Fetch resilience correctness matrix

2026-10-03T23:45:42.748Z - Node v24.21.0

Scenario	ffetch 5.7.1	ky 2.1.0	fetch-retry 6.0.0	ofetch 1.5.1	wretch 3.0.9	resilient-fetch-client 0.3.0	fetch-smartly 1.0.2	@resili/fetch 0.2.0-beta.1	fetch-resilience 0.1.0	flowshield 1.0.4	ts-retry-circuit 2.1.1
Retry recovery	PASS	PASS	PASS	PASS	PASS	PASS	PASS	PASS	PASS	PASS	PASS
Retry exhaustion	PASS	PASS	PASS	PASS	PASS	PASS	PASS	PASS	PASS	PASS	PASS
Zero retries	PASS	PASS	PASS	PASS	PASS	PASS	PASS	PASS	PASS	PASS	PASS
Retry + abort during backoff	PASS	PASS	FAIL	FAIL	FAIL	FAIL	PASS	FAIL	FAIL	PASS	PASS
Bulkhead + queued abort	PASS	N/A	N/A	N/A	N/A	FAIL	N/A	FAIL	FAIL	FAIL	N/A
Hedge + streaming body	PASS	N/A	N/A	N/A	N/A	N/A	N/A	PASS	N/A	PASS	N/A
Circuit + hedge accounting	PASS	N/A	N/A	N/A	N/A	N/A	N/A	PASS	N/A	PASS	N/A
Retry over real HTTP	PASS	PASS	PASS	PASS	PASS	PASS	PASS	PASS	PASS	PASS	PASS
Timeout over real HTTP	PASS	PASS	N/A	PASS	PASS	PASS	PASS	PASS	PASS	PASS	PASS
Retry + total timeout	PASS	PASS	N/A	N/A	FAIL	FAIL	N/A	N/A	FAIL	FAIL	N/A
Retry + body replay	PASS	PASS	PASS	PASS	PASS	PASS	PASS	PASS	PASS	PASS	PASS
Retry-After + abort	PASS	PASS	N/A	N/A	N/A	FAIL	PASS	FAIL	N/A	N/A	N/A
Retry + throwing hooks	PASS	PASS	PASS	PASS	FAIL	N/A	PASS	PASS	N/A	PASS	PASS
Hedge + all branches fail	PASS	N/A	N/A	N/A	N/A	N/A	N/A	PASS	N/A	PASS	N/A
Hedge + timeout	PASS	N/A	N/A	N/A	N/A	N/A	N/A	PASS	N/A	FAIL	N/A
Dedupe + retry	PASS	N/A	N/A	N/A	PASS	N/A	PASS	FAIL	N/A	N/A	N/A
Dedupe + caller cancellation	PASS	N/A	N/A	N/A	PASS	N/A	PASS	PASS	N/A	N/A	N/A
Bulkhead + retry	PASS	N/A	N/A	N/A	N/A	PASS	N/A	PASS	PASS	PASS	N/A
Circuit + retry accounting	PASS	N/A	N/A	N/A	N/A	PASS	PASS	PASS	PASS	PASS	PASS
Circuit + half-open concurrency	FAIL	N/A	N/A	N/A	N/A	PASS	FAIL	PASS	PASS	PASS	FAIL
Circuit + local cancellation	PASS	N/A	N/A	N/A	N/A	FAIL	PASS	FAIL	FAIL	PASS	PASS

122 passed, 25 failed, 0 skipped, 0 not run; 0 cells have no implemented test; 84 N/A.

N/A means this combination is unavailable; each cell explains why. NOT TESTED means unimplemented; NOT RUN means a registered case was absent from this run. Cells link to configurations, expected behavior, and failure details.

Case details

Retry recovery / ffetch - PASS

Configuration: GET; two 503 responses then 200; 2 retries; delay 20ms

Expected: 200; body ready; exactly 3 attempts; no late attempts, active attempts or transport timers

Retry recovery / ky - PASS

Configuration: GET; two 503 responses then 200; 2 retries; delay 20ms

Expected: 200; body ready; exactly 3 attempts; no late attempts, active attempts or transport timers

Retry recovery / fetch-retry - PASS

Configuration: GET; two 503 responses then 200; 2 retries; delay 20ms

Expected: 200; body ready; exactly 3 attempts; no late attempts, active attempts or transport timers

Retry recovery / ofetch - PASS

Configuration: GET; two 503 responses then 200; 2 retries; delay 20ms

Expected: 200; body ready; exactly 3 attempts; no late attempts, active attempts or transport timers

Retry recovery / wretch - PASS

Configuration: GET; two 503 responses then 200; 2 retries; delay 20ms; retry middleware resolves final response to Wretch HTTP handling; omit retry middleware for zero budget

Expected: 200; body ready; exactly 3 attempts; no late attempts, active attempts or transport timers

Retry recovery / resilient-fetch-client - PASS

Configuration: GET; two 503 responses then 200; 2 retries; delay 20ms; published backoff with initial/max delay configured; deterministic Math.random=0.5

Expected: 200; body ready; exactly 3 attempts; no late attempts, active attempts or transport timers

Retry recovery / fetch-smartly - PASS

Configuration: GET; two 503 responses then 200; 2 retries; delay 20ms; original parsed SmartFetchResponse result; normal timeout 60000ms

Expected: 200; body ready; exactly 3 attempts; no late attempts, active attempts or transport timers

Retry recovery / @resili/fetch - PASS

Configuration: GET; two 503 responses then 200; 2 retries; delay 20ms; maxAttempts=retries+1; circuit outside hedge

Expected: 200; body ready; exactly 3 attempts; no late attempts, active attempts or transport timers

Retry recovery / fetch-resilience - PASS

Configuration: GET; two 503 responses then 200; 2 retries; delay 20ms

Expected: 200; body ready; exactly 3 attempts; no late attempts, active attempts or transport timers

Retry recovery / flowshield - PASS

Configuration: GET; two 503 responses then 200; 2 retries; delay 20ms; HTTP operation throws HttpStatusError; circuit outside hedge; retry omitted for zero budget

Expected: 200; body ready; exactly 3 attempts; no late attempts, active attempts or transport timers

Retry recovery / ts-retry-circuit - PASS

Configuration: GET; two 503 responses then 200; 2 retries; delay 20ms; public createCircuitFetch; full-jitter exponential backoff; deterministic Math.random=0.5 in scripted tests

Expected: 200; body ready; exactly 3 attempts; no late attempts, active attempts or transport timers

Retry exhaustion / ffetch - PASS

Configuration: GET; three 503 responses; 2 retries; delay 20ms

Expected: Exact HttpError; cause is a 503 Response with the original body; exactly 3 attempts; no transport timers

Retry exhaustion / ky - PASS

Configuration: GET; three 503 responses; 2 retries; delay 20ms

Expected: Exact HTTPError; response.status is 503; exactly 3 attempts; no transport timers

Retry exhaustion / fetch-retry - PASS

Configuration: GET; three 503 responses; 2 retries; delay 20ms

Expected: Return the final 503 Response with the original body; exactly 3 attempts; no transport timers

Retry exhaustion / ofetch - PASS

Configuration: GET; three 503 responses; 2 retries; delay 20ms

Expected: Exact FetchError; status is 503; exactly 3 attempts; no transport timers

Retry exhaustion / wretch - PASS

Configuration: GET; three 503 responses; 2 retries; delay 20ms; retry middleware resolves final response to Wretch HTTP handling; omit retry middleware for zero budget

Expected: Exact WretchError constructor; status 503; exactly 3 attempts; no transport timers

Retry exhaustion / resilient-fetch-client - PASS

Configuration: GET; three 503 responses; 2 retries; delay 20ms; published backoff with initial/max delay configured; deterministic Math.random=0.5

Expected: Exact HttpError; cause responseStatus; details.status 503; exactly 3 attempts; no transport timers

Retry exhaustion / fetch-smartly - PASS

Configuration: GET; three 503 responses; 2 retries; delay 20ms; original parsed SmartFetchResponse result; normal timeout 60000ms

Expected: Exact HttpError; status 503 and original error body; exactly 3 attempts; no transport timers

Retry exhaustion / @resili/fetch - PASS

Configuration: GET; three 503 responses; 2 retries; delay 20ms; maxAttempts=retries+1; circuit outside hedge

Expected: Exact RetryExceededError; ERR_RETRY_EXCEEDED; attempts and identical cause/lastError; exactly 3 attempts; no transport timers

Retry exhaustion / fetch-resilience - PASS

Configuration: GET; three 503 responses; 2 retries; delay 20ms

Expected: Return the final 503 Response with the original body; exactly 3 attempts; no transport timers

Retry exhaustion / flowshield - PASS

Configuration: GET; three 503 responses; 2 retries; delay 20ms; HTTP operation throws HttpStatusError; circuit outside hedge; retry omitted for zero budget

Expected: Exact RetryExhaustedError with attempts and HttpStatusError cause carrying response.status 503; with zero retries, exact underlying HttpStatusError; exactly 3 attempts; no transport timers

Retry exhaustion / ts-retry-circuit - PASS

Configuration: GET; three 503 responses; 2 retries; delay 20ms; public createCircuitFetch; full-jitter exponential backoff; deterministic Math.random=0.5 in scripted tests

Expected: Exact Error constructor and HTTP 503 message from createCircuitFetch; exactly 3 attempts; no transport timers

Zero retries / ffetch - PASS

Configuration: GET; one 503; 0 retries

Expected: Exact HttpError; cause is a 503 Response with the original body; exactly 1 attempts; no transport timers

Zero retries / ky - PASS

Configuration: GET; one 503; 0 retries

Expected: Exact HTTPError; response.status is 503; exactly 1 attempts; no transport timers

Zero retries / fetch-retry - PASS

Configuration: GET; one 503; 0 retries

Expected: Return the final 503 Response with the original body; exactly 1 attempts; no transport timers

Zero retries / ofetch - PASS

Configuration: GET; one 503; 0 retries

Expected: Exact FetchError; status is 503; exactly 1 attempts; no transport timers

Zero retries / wretch - PASS

Configuration: GET; one 503; 0 retries; retry middleware resolves final response to Wretch HTTP handling; omit retry middleware for zero budget

Expected: Exact WretchError constructor; status 503; exactly 1 attempts; no transport timers

Zero retries / resilient-fetch-client - PASS

Configuration: GET; one 503; 0 retries; published backoff with initial/max delay configured; deterministic Math.random=0.5

Expected: Exact HttpError; cause responseStatus; details.status 503; exactly 1 attempts; no transport timers

Zero retries / fetch-smartly - PASS

Configuration: GET; one 503; 0 retries; original parsed SmartFetchResponse result; normal timeout 60000ms

Expected: Exact HttpError; status 503 and original error body; exactly 1 attempts; no transport timers

Zero retries / @resili/fetch - PASS

Configuration: GET; one 503; 0 retries; maxAttempts=retries+1; circuit outside hedge

Expected: Exact RetryExceededError; ERR_RETRY_EXCEEDED; attempts and identical cause/lastError; exactly 1 attempts; no transport timers

Zero retries / fetch-resilience - PASS

Configuration: GET; one 503; 0 retries

Expected: Return the final 503 Response with the original body; exactly 1 attempts; no transport timers

Zero retries / flowshield - PASS

Configuration: GET; one 503; 0 retries; HTTP operation throws HttpStatusError; circuit outside hedge; retry omitted for zero budget

Zero retries / ts-retry-circuit - PASS

Configuration: GET; one 503; 0 retries; public createCircuitFetch; full-jitter exponential backoff; deterministic Math.random=0.5 in scripted tests

Expected: Exact Error constructor and HTTP 503 message from createCircuitFetch; exactly 1 attempts; no transport timers

Retry + abort during backoff / ffetch - PASS

Configuration: 2 retries; backoff 100ms; caller abort at 20ms; drain timers; healthy follow-up

Expected: Exact AbortError; prompt settlement; cancelled caller never dispatched again; replacement/follow-up succeeds; no leaked transport work

Retry + abort during backoff / ky - PASS

Configuration: 2 retries; backoff 100ms; caller abort at 20ms; drain timers; healthy follow-up

Expected: Exact DOMException, identical caller abort reason; prompt settlement; cancelled caller never dispatched again; replacement/follow-up succeeds; no leaked transport work

Retry + abort during backoff / fetch-retry - FAIL

Configuration: 2 retries; backoff 100ms; caller abort at 20ms; drain timers; healthy follow-up

Expected: Exact DOMException, identical caller abort reason; prompt settlement; cancelled caller never dispatched again; replacement/follow-up succeeds; no leaked transport work

AssertionError: Cancellation must settle during backoff: expected undefined to be defined
    at /home/runner/work/http-resilience/http-resilience/test/conformance/competitor-combinations.test.ts:29:68
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: No dispatch after cancellation: expected 3 to be 1 // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/competitor-combinations.test.ts:36:71
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: expected 4 to be 2 // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/competitor-combinations.test.ts:43:30
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

Failure trace

Retry + abort during backoff / ofetch - FAIL

Configuration: 2 retries; backoff 100ms; caller abort at 20ms; drain timers; healthy follow-up

Expected: Exact FetchError with caller abort reason as cause; prompt settlement; cancelled caller never dispatched again; replacement/follow-up succeeds; no leaked transport work

AssertionError: Cancellation must settle during backoff: expected undefined to be defined
    at /home/runner/work/http-resilience/http-resilience/test/conformance/competitor-combinations.test.ts:29:68
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: No dispatch after cancellation: expected 2 to be 1 // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/competitor-combinations.test.ts:36:71
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: expected 3 to be 2 // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/competitor-combinations.test.ts:43:30
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

Failure trace

Retry + abort during backoff / wretch - FAIL

Configuration: 2 retries; backoff 100ms; caller abort at 20ms; drain timers; healthy follow-up; retry middleware resolves final response to Wretch HTTP handling; omit retry middleware for zero budget

Expected: Exact DOMException, identical caller abort reason; prompt settlement; cancelled caller never dispatched again; replacement/follow-up succeeds; no leaked transport work

AssertionError: Cancellation must settle during backoff: expected undefined to be defined
    at /home/runner/work/http-resilience/http-resilience/test/conformance/competitor-combinations.test.ts:29:68
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: No dispatch after cancellation: expected 2 to be 1 // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/competitor-combinations.test.ts:36:71
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: expected 3 to be 2 // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/competitor-combinations.test.ts:43:30
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

Failure trace

Retry + abort during backoff / resilient-fetch-client - FAIL

Configuration: 2 retries; backoff 100ms; caller abort at 20ms; drain timers; healthy follow-up; published backoff with initial/max delay configured; deterministic Math.random=0.5

Expected: Exact DOMException, identical caller abort reason; prompt settlement; cancelled caller never dispatched again; replacement/follow-up succeeds; no leaked transport work

AssertionError: Cancellation must settle during backoff: expected undefined to be defined
    at /home/runner/work/http-resilience/http-resilience/test/conformance/competitor-combinations.test.ts:29:68
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: No dispatch after cancellation: expected 2 to be 1 // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/competitor-combinations.test.ts:36:71
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: expected 3 to be 2 // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/competitor-combinations.test.ts:43:30
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

Failure trace

Retry + abort during backoff / fetch-smartly - PASS

Configuration: 2 retries; backoff 100ms; caller abort at 20ms; drain timers; healthy follow-up; original parsed SmartFetchResponse result; normal timeout 60000ms

Expected: Exact DOMException, identical caller abort reason; prompt settlement; cancelled caller never dispatched again; replacement/follow-up succeeds; no leaked transport work

Retry + abort during backoff / @resili/fetch - FAIL

Configuration: 2 retries; backoff 100ms; caller abort at 20ms; drain timers; healthy follow-up; maxAttempts=retries+1; circuit outside hedge

Expected: Exact DOMException, identical caller abort reason forwarded by the fetch adapter; prompt settlement; cancelled caller never dispatched again; replacement/follow-up succeeds; no leaked transport work

AssertionError: Cancellation must settle during backoff: expected undefined to be defined
    at /home/runner/work/http-resilience/http-resilience/test/conformance/competitor-combinations.test.ts:29:68
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

Failure trace

Retry + abort during backoff / fetch-resilience - FAIL

Configuration: 2 retries; backoff 100ms; caller abort at 20ms; drain timers; healthy follow-up

Expected: Exact DOMException, identical caller abort reason; prompt settlement; cancelled caller never dispatched again; replacement/follow-up succeeds; no leaked transport work

AssertionError: Cancellation must settle during backoff: expected undefined to be defined
    at /home/runner/work/http-resilience/http-resilience/test/conformance/competitor-combinations.test.ts:29:68
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: No dispatch after cancellation: expected 3 to be 1 // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/competitor-combinations.test.ts:36:71
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: expected 4 to be 2 // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/competitor-combinations.test.ts:43:30
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

Failure trace

Retry + abort during backoff / flowshield - PASS

Configuration: 2 retries; backoff 100ms; caller abort at 20ms; drain timers; healthy follow-up; HTTP operation throws HttpStatusError; circuit outside hedge; retry omitted for zero budget

Expected: Exact DOMException, identical caller abort reason; prompt settlement; cancelled caller never dispatched again; replacement/follow-up succeeds; no leaked transport work

Retry + abort during backoff / ts-retry-circuit - PASS

Configuration: 2 retries; backoff 100ms; caller abort at 20ms; drain timers; healthy follow-up; public createCircuitFetch; full-jitter exponential backoff; deterministic Math.random=0.5 in scripted tests

Expected: Exact CircuitAbortedError, CIRCUIT_ABORTED; prompt settlement; cancelled caller never dispatched again; replacement/follow-up succeeds; no leaked transport work

Bulkhead + queued abort / ffetch - PASS

Configuration: Capacity 1; queue 1; first request 100ms; queued caller abort at 20ms; replacement

Expected: Exact AbortError; prompt settlement; cancelled caller never dispatched again; replacement/follow-up succeeds; no leaked transport work

Bulkhead + queued abort / ky - N/A

Configuration: Not applicable

Expected: No bulkhead queue is offered by this package.

Bulkhead + queued abort / fetch-retry - N/A

Configuration: Not applicable

Expected: No bulkhead queue is offered by this package.

Bulkhead + queued abort / ofetch - N/A

Configuration: Not applicable

Expected: No bulkhead queue is offered by this package.

Bulkhead + queued abort / wretch - N/A

Configuration: Not applicable

Expected: No bulkhead queue is offered by this package.

Bulkhead + queued abort / resilient-fetch-client - FAIL

Configuration: Capacity 1; queue 1; first request 100ms; queued caller abort at 20ms; replacement; published backoff with initial/max delay configured; deterministic Math.random=0.5

Expected: Exact DOMException, identical caller abort reason; prompt settlement; cancelled caller never dispatched again; replacement/follow-up succeeds; no leaked transport work

AssertionError: Queued cancellation must settle before slot handoff: expected undefined to be defined
    at /home/runner/work/http-resilience/http-resilience/test/conformance/competitor-combinations.test.ts:64:82
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: Cancelled queue entry must release queue capacity: expected false to be true // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/competitor-combinations.test.ts:73:81
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: expected 1 to be 2 // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/competitor-combinations.test.ts:75:32
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

Failure trace

Bulkhead + queued abort / fetch-smartly - N/A

Configuration: Not applicable

Expected: No bulkhead queue is offered by this package.

Bulkhead + queued abort / @resili/fetch - FAIL

Configuration: Capacity 1; queue 1; first request 100ms; queued caller abort at 20ms; replacement; maxAttempts=retries+1; circuit outside hedge

AssertionError: Queued cancellation must settle before slot handoff: expected undefined to be defined
    at /home/runner/work/http-resilience/http-resilience/test/conformance/competitor-combinations.test.ts:64:82
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: Cancelled queue entry must release queue capacity: expected false to be true // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/competitor-combinations.test.ts:73:81
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: expected 1 to be 2 // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/competitor-combinations.test.ts:75:32
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

Failure trace

Bulkhead + queued abort / fetch-resilience - FAIL

Configuration: Capacity 1; queue 1; first request 100ms; queued caller abort at 20ms; replacement

Expected: Exact DOMException, identical caller abort reason; prompt settlement; cancelled caller never dispatched again; replacement/follow-up succeeds; no leaked transport work

AssertionError: Queued cancellation must settle before slot handoff: expected undefined to be defined
    at /home/runner/work/http-resilience/http-resilience/test/conformance/competitor-combinations.test.ts:64:82
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: Cancelled queue entry must release queue capacity: expected false to be true // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/competitor-combinations.test.ts:73:81
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: expected [ …(2) ] to not include 'https://example.test/resource/cancell…'
    at Proxy.<anonymous> (file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/index.C4tKZ0yW.js:2077:15)
    at Proxy.<anonymous> (file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/index.C4tKZ0yW.js:1944:14)
    at Proxy.methodWrapper (file:///home/runner/work/http-resilience/http-resilience/node_modules/chai/index.js:1737:25)
    at /home/runner/work/http-resilience/http-resilience/test/conformance/competitor-combinations.test.ts:77:24
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

Failure trace

Bulkhead + queued abort / flowshield - FAIL

Configuration: Capacity 1; queue 1; first request 100ms; queued caller abort at 20ms; replacement; HTTP operation throws HttpStatusError; circuit outside hedge; retry omitted for zero budget

Expected: Exact DOMException, identical caller abort reason; prompt settlement; cancelled caller never dispatched again; replacement/follow-up succeeds; no leaked transport work

AssertionError: Queued cancellation must settle before slot handoff: expected undefined to be defined
    at /home/runner/work/http-resilience/http-resilience/test/conformance/competitor-combinations.test.ts:64:82
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: Cancelled queue entry must release queue capacity: expected false to be true // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/competitor-combinations.test.ts:73:81
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: expected [ …(2) ] to not include 'https://example.test/resource/cancell…'
    at Proxy.<anonymous> (file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/index.C4tKZ0yW.js:2077:15)
    at Proxy.<anonymous> (file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/index.C4tKZ0yW.js:1944:14)
    at Proxy.methodWrapper (file:///home/runner/work/http-resilience/http-resilience/node_modules/chai/index.js:1737:25)
    at /home/runner/work/http-resilience/http-resilience/test/conformance/competitor-combinations.test.ts:77:24
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

Failure trace

Bulkhead + queued abort / ts-retry-circuit - N/A

Configuration: Not applicable

Expected: Capacity rejects immediately; no queued bulkhead is offered.

Hedge + streaming body / ffetch - PASS

Configuration: Primary hangs; hedge after 10ms; winning body chunks at +20ms and +40ms

Expected: Body winner readable to EOF; primary cancelled; exactly 2 attempts; no active attempts, bodies or transport timers

Hedge + streaming body / ky - N/A

Configuration: Not applicable

Expected: No hedging policy is offered by this package.

Hedge + streaming body / fetch-retry - N/A

Configuration: Not applicable

Expected: No hedging policy is offered by this package.

Hedge + streaming body / ofetch - N/A

Configuration: Not applicable

Expected: No hedging policy is offered by this package.

Hedge + streaming body / wretch - N/A

Configuration: Not applicable

Expected: No hedging policy is offered by this package.

Hedge + streaming body / resilient-fetch-client - N/A

Configuration: Not applicable

Expected: No hedging policy is offered by this package.

Hedge + streaming body / fetch-smartly - N/A

Configuration: Not applicable

Expected: No hedging policy is offered by this package.

Hedge + streaming body / @resili/fetch - PASS

Configuration: Primary hangs; hedge after 10ms; winning body chunks at +20ms and +40ms; maxAttempts=retries+1; circuit outside hedge

Expected: Body winner readable to EOF; primary cancelled; exactly 2 attempts; no active attempts, bodies or transport timers

Hedge + streaming body / fetch-resilience - N/A

Configuration: Not applicable

Expected: No hedging policy is offered by this package.

Hedge + streaming body / flowshield - PASS

Configuration: Primary hangs; hedge after 10ms; winning body chunks at +20ms and +40ms; HTTP operation throws HttpStatusError; circuit outside hedge; retry omitted for zero budget

Expected: Body winner readable to EOF; loser result discarded as documented; caller abort cleans up the hanging loser; exactly 2 attempts; no remaining transport work

Hedge + streaming body / ts-retry-circuit - N/A

Configuration: Not applicable

Expected: No hedging policy is offered by this package.

Circuit + hedge accounting / ffetch - PASS

Configuration: Circuit trips after one logical failure; hedge at 10ms; primary 503 at 15ms; winning hedge at 30ms; unhedged POST failure

Expected: Winner and next request succeed; threshold-crossing POST and subsequent refusal throw exact CircuitOpenError; exactly 4 attempts

Circuit + hedge accounting / ky - N/A

Configuration: Not applicable

Expected: No hedging policy is offered by this package.

Circuit + hedge accounting / fetch-retry - N/A

Configuration: Not applicable

Expected: No hedging policy is offered by this package.

Circuit + hedge accounting / ofetch - N/A

Configuration: Not applicable

Expected: No hedging policy is offered by this package.

Circuit + hedge accounting / wretch - N/A

Configuration: Not applicable

Expected: No hedging policy is offered by this package.

Circuit + hedge accounting / resilient-fetch-client - N/A

Configuration: Not applicable

Expected: No hedging policy is offered by this package.

Circuit + hedge accounting / fetch-smartly - N/A

Configuration: Not applicable

Expected: No hedging policy is offered by this package.

Circuit + hedge accounting / @resili/fetch - PASS

Configuration: Circuit trips after one logical failure; hedge at 10ms; primary 503 at 15ms; winning hedge at 30ms; unhedged POST failure; maxAttempts=retries+1; circuit outside hedge; POST hedges too; failed POST uses 2 attempts; same circuit instance throughout

Expected: Winner and follow-up succeed; hedged POST failure throws exact Error with message No acceptable hedged result completed.; next call exact CircuitOpenError; 5 transport attempts

Circuit + hedge accounting / fetch-resilience - N/A

Configuration: Not applicable

Expected: No hedging policy is offered by this package.

Circuit + hedge accounting / flowshield - PASS

Configuration: Circuit trips after one logical failure; hedge at 10ms; primary 503 at 15ms; winning hedge at 30ms; unhedged POST failure; HTTP operation throws HttpStatusError; circuit outside hedge; retry omitted for zero budget

Expected: Winner and next request succeed; deliberate failure follows HTTP contract; next call throws exact CircuitOpenError; exactly 4 attempts

Circuit + hedge accounting / ts-retry-circuit - N/A

Configuration: Not applicable

Expected: No hedging policy is offered by this package.

Retry over real HTTP / ffetch - PASS

Configuration: Native fetch; loopback HTTP; 2 retries; delay 5ms

Expected: 200; body ready; exactly 3 server arrivals

Retry over real HTTP / ky - PASS

Configuration: Native fetch; loopback HTTP; 2 retries; delay 5ms

Expected: 200; body ready; exactly 3 server arrivals

Retry over real HTTP / fetch-retry - PASS

Configuration: Native fetch; loopback HTTP; 2 retries; delay 5ms

Expected: 200; body ready; exactly 3 server arrivals

Retry over real HTTP / ofetch - PASS

Configuration: Native fetch; loopback HTTP; 2 retries; delay 5ms

Expected: 200; body ready; exactly 3 server arrivals

Retry over real HTTP / wretch - PASS

Configuration: Native fetch; loopback HTTP; 2 retries; delay 5ms; retry middleware resolves final response to Wretch HTTP handling; omit retry middleware for zero budget

Expected: 200; body ready; exactly 3 server arrivals

Retry over real HTTP / resilient-fetch-client - PASS

Configuration: Native fetch; loopback HTTP; 2 retries; delay 5ms; published backoff with initial/max delay configured; deterministic Math.random=0.5

Expected: 200; body ready; exactly 3 server arrivals

Retry over real HTTP / fetch-smartly - PASS

Configuration: Native fetch; loopback HTTP; 2 retries; delay 5ms; original parsed SmartFetchResponse result; normal timeout 60000ms

Expected: 200; body ready; exactly 3 server arrivals

Retry over real HTTP / @resili/fetch - PASS

Configuration: Native fetch; loopback HTTP; 2 retries; delay 5ms; maxAttempts=retries+1; circuit outside hedge

Expected: 200; body ready; exactly 3 server arrivals

Retry over real HTTP / fetch-resilience - PASS

Configuration: Native fetch; loopback HTTP; 2 retries; delay 5ms

Expected: 200; body ready; exactly 3 server arrivals

Retry over real HTTP / flowshield - PASS

Configuration: Native fetch; loopback HTTP; 2 retries; delay 5ms; HTTP operation throws HttpStatusError; circuit outside hedge; retry omitted for zero budget

Expected: 200; body ready; exactly 3 server arrivals

Retry over real HTTP / ts-retry-circuit - PASS

Configuration: Native fetch; loopback HTTP; 2 retries; delay 5ms; public createCircuitFetch; full-jitter exponential backoff; deterministic Math.random=0.5 in scripted tests

Expected: 200; body ready; exactly 3 server arrivals

Timeout over real HTTP / ffetch - PASS

Configuration: Native fetch; loopback HTTP; headers delayed 1000ms; per-request/attempt timeout 100ms; 0 retries

Expected: Exact TimeoutError; healthy follow-up succeeds

Timeout over real HTTP / ky - PASS

Configuration: Native fetch; loopback HTTP; headers delayed 1000ms; per-request/attempt timeout 100ms; 0 retries

Expected: Exact TimeoutError; healthy follow-up succeeds

Timeout over real HTTP / fetch-retry - N/A

Configuration: Not applicable

Expected: No timeout policy is offered; native fetch alone does not supply this deadline.

Timeout over real HTTP / ofetch - PASS

Configuration: Native fetch; loopback HTTP; headers delayed 1000ms; per-request/attempt timeout 100ms; 0 retries

Expected: Exact FetchError; exact Error cause named TimeoutError with code 23; healthy follow-up succeeds

Timeout over real HTTP / wretch - PASS

Configuration: Native fetch; loopback HTTP; headers delayed 1000ms; per-request/attempt timeout 100ms; 0 retries; retry middleware resolves final response to Wretch HTTP handling; omit retry middleware for zero budget

Expected: Exact DOMException named AbortError from AbortAddon.setTimeout; healthy follow-up succeeds

Timeout over real HTTP / resilient-fetch-client - PASS

Configuration: Native fetch; loopback HTTP; headers delayed 1000ms; per-request/attempt timeout 100ms; 0 retries; published backoff with initial/max delay configured; deterministic Math.random=0.5

Expected: Exact Cockatiel TaskCancelledError identifying timeout; healthy follow-up succeeds

Timeout over real HTTP / fetch-smartly - PASS

Configuration: Native fetch; loopback HTTP; headers delayed 1000ms; per-request/attempt timeout 100ms; 0 retries; original parsed SmartFetchResponse result; normal timeout 60000ms

Expected: Exact TimeoutError with timeout 100; healthy follow-up succeeds

Timeout over real HTTP / @resili/fetch - PASS

Configuration: Native fetch; loopback HTTP; headers delayed 1000ms; per-request/attempt timeout 100ms; 0 retries; maxAttempts=retries+1; circuit outside hedge

Expected: Exact RetryExceededError (1 attempt); cause is exact TimeoutError, ERR_TIMEOUT, timeoutMs 100; healthy follow-up succeeds

Timeout over real HTTP / fetch-resilience - PASS

Configuration: Native fetch; loopback HTTP; headers delayed 1000ms; per-request/attempt timeout 100ms; 0 retries

Expected: Exact TimeoutError; healthy follow-up succeeds

Timeout over real HTTP / flowshield - PASS

Configuration: Native fetch; loopback HTTP; headers delayed 1000ms; per-request/attempt timeout 100ms; 0 retries; HTTP operation throws HttpStatusError; circuit outside hedge; retry omitted for zero budget

Expected: Exact TimeoutError; healthy follow-up succeeds

Timeout over real HTTP / ts-retry-circuit - PASS

Configuration: Native fetch; loopback HTTP; headers delayed 1000ms; per-request/attempt timeout 100ms; 0 retries; public createCircuitFetch; full-jitter exponential backoff; deterministic Math.random=0.5 in scripted tests

Expected: Exact CircuitTimeoutError, CIRCUIT_TIMEOUT, timeoutMs 100; healthy follow-up succeeds

Retry + total timeout / ffetch - PASS

Configuration: 100ms overall deadline; 1 retry; backoff 300ms or 80ms with second attempt hanging

Expected: Exact library timeout error; settle at 100ms; original budget preserved; no dispatch after deadline; cooperative work stops; healthy follow-up

Retry + total timeout / ky - PASS

Configuration: 100ms overall deadline; 1 retry; backoff 300ms or 80ms with second attempt hanging

Expected: Exact library timeout error; settle at 100ms; original budget preserved; no dispatch after deadline; cooperative work stops; healthy follow-up

Retry + total timeout / fetch-retry - N/A

Configuration: Not applicable

Expected: No overall deadline encompassing retry/backoff is exposed by this fetch API; per-attempt timeout is a different contract.

Retry + total timeout / ofetch - N/A

Configuration: Not applicable

Expected: No overall deadline encompassing retry/backoff is exposed by this fetch API; per-attempt timeout is a different contract.

Retry + total timeout / wretch - FAIL

Configuration: 100ms overall deadline; 1 retry; backoff 300ms or 80ms with second attempt hanging; retry middleware resolves final response to Wretch HTTP handling; omit retry middleware for zero budget

Expected: Exact library timeout error; settle at 100ms; original budget preserved; no dispatch after deadline; cooperative work stops; healthy follow-up

AssertionError: Deadline must cover backoff and subsequent attempts: expected undefined to be defined
    at /home/runner/work/http-resilience/http-resilience/test/conformance/retry-total-timeout.test.ts:24:86
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: No dispatch after original deadline: expected 2 to be 1 // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/retry-total-timeout.test.ts:33:76
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

Failure trace

Retry + total timeout / resilient-fetch-client - FAIL

Configuration: 100ms overall deadline; 1 retry; backoff 300ms or 80ms with second attempt hanging; published backoff with initial/max delay configured; deterministic Math.random=0.5

Expected: Exact library timeout error; settle at 100ms; original budget preserved; no dispatch after deadline; cooperative work stops; healthy follow-up

AssertionError: No dispatch after original deadline: expected 2 to be 1 // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/retry-total-timeout.test.ts:33:76
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

Failure trace

Retry + total timeout / fetch-smartly - N/A

Configuration: Not applicable

Expected: No overall deadline encompassing retry/backoff is exposed by this fetch API; per-attempt timeout is a different contract.

Retry + total timeout / @resili/fetch - N/A

Configuration: Not applicable

Expected: No overall deadline encompassing retry/backoff is exposed by this fetch API; per-attempt timeout is a different contract.

Retry + total timeout / fetch-resilience - FAIL

Configuration: 100ms overall deadline; 1 retry; backoff 300ms or 80ms with second attempt hanging

Expected: Exact library timeout error; settle at 100ms; original budget preserved; no dispatch after deadline; cooperative work stops; healthy follow-up

AssertionError: No dispatch after original deadline: expected 2 to be 1 // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/retry-total-timeout.test.ts:33:76
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: Cooperative work must stop: expected 1 to be +0 // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/retry-total-timeout.test.ts:34:73
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

Failure trace

Retry + total timeout / flowshield - FAIL

Configuration: 100ms overall deadline; 1 retry; backoff 300ms or 80ms with second attempt hanging; HTTP operation throws HttpStatusError; circuit outside hedge; retry omitted for zero budget

Expected: Exact library timeout error; settle at 100ms; original budget preserved; no dispatch after deadline; cooperative work stops; healthy follow-up

AssertionError: No dispatch after original deadline: expected 2 to be 1 // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/retry-total-timeout.test.ts:33:76
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: Cooperative work must stop: expected 1 to be +0 // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/retry-total-timeout.test.ts:34:73
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

Failure trace

Retry + total timeout / ts-retry-circuit - N/A

Configuration: Not applicable

Expected: No overall deadline encompassing retry/backoff is exposed by this fetch API; per-attempt timeout is a different contract.

Retry + body replay / ffetch - PASS

Configuration: Explicit POST retries; text, Request and one-shot stream bodies; first attempt consumes payload then returns 503

Expected: Replayable payload identical on every attempt; supported Request/stream cloning works; unsupported replay fails explicitly with exact TypeError or documented wrapper; never silently empty

Retry + body replay / ky - PASS

Configuration: Explicit POST retries; text, Request and one-shot stream bodies; first attempt consumes payload then returns 503

Retry + body replay / fetch-retry - PASS

Configuration: Explicit POST retries; text, Request and one-shot stream bodies; first attempt consumes payload then returns 503

Retry + body replay / ofetch - PASS

Configuration: Explicit POST retries; text, Request and one-shot stream bodies; first attempt consumes payload then returns 503

Retry + body replay / wretch - PASS

Configuration: Explicit POST retries; text, Request and one-shot stream bodies; first attempt consumes payload then returns 503; retry middleware resolves final response to Wretch HTTP handling; omit retry middleware for zero budget

Retry + body replay / resilient-fetch-client - PASS

Configuration: Explicit POST retries; text, Request and one-shot stream bodies; first attempt consumes payload then returns 503; published backoff with initial/max delay configured; deterministic Math.random=0.5

Retry + body replay / fetch-smartly - PASS

Configuration: Explicit POST retries; text, Request and one-shot stream bodies; first attempt consumes payload then returns 503; original parsed SmartFetchResponse result; normal timeout 60000ms

Retry + body replay / @resili/fetch - PASS

Configuration: Explicit POST retries; text, Request and one-shot stream bodies; first attempt consumes payload then returns 503; maxAttempts=retries+1; circuit outside hedge

Retry + body replay / fetch-resilience - PASS

Configuration: Explicit POST retries; text, Request and one-shot stream bodies; first attempt consumes payload then returns 503

Retry + body replay / flowshield - PASS

Configuration: Explicit POST retries; text, Request and one-shot stream bodies; first attempt consumes payload then returns 503; HTTP operation throws HttpStatusError; circuit outside hedge; retry omitted for zero budget

Retry + body replay / ts-retry-circuit - PASS

Configuration: Explicit POST retries; text, Request and one-shot stream bodies; first attempt consumes payload then returns 503; public createCircuitFetch; full-jitter exponential backoff; deterministic Math.random=0.5 in scripted tests

Retry-After + abort / ffetch - PASS

Configuration: 503 (429 for fetch-smartly); 1 retry; Retry-After seconds/date/invalid/large; documented delay caps; abort at 20ms

Expected: Correct header wait or documented cap/fallback; exact caller abort error; prompt settlement; no subsequent dispatch; no leftover transport timers

Retry-After + abort / ky - PASS

Configuration: 503 (429 for fetch-smartly); 1 retry; Retry-After seconds/date/invalid/large; documented delay caps; abort at 20ms

Expected: Correct header wait or documented cap/fallback; exact caller abort error; prompt settlement; no subsequent dispatch; no leftover transport timers

Retry-After + abort / fetch-retry - N/A

Configuration: Not applicable

Expected: No Retry-After handling is offered by this package.

Retry-After + abort / ofetch - N/A

Configuration: Not applicable

Expected: No Retry-After handling is offered by this package.

Retry-After + abort / wretch - N/A

Configuration: Not applicable

Expected: No Retry-After handling is offered by this package.

Retry-After + abort / resilient-fetch-client - FAIL

Configuration: 503 (429 for fetch-smartly); 1 retry; Retry-After seconds/date/invalid/large; documented delay caps; abort at 20ms; published backoff with initial/max delay configured; deterministic Math.random=0.5

Expected: Correct header wait or documented cap/fallback; exact caller abort error; prompt settlement; no subsequent dispatch; no leftover transport timers

AssertionError: Abort must interrupt header-derived wait: 1: expected undefined to be defined
    at /home/runner/work/http-resilience/http-resilience/test/conformance/retry-after-abort.test.ts:30:85
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: No dispatch after header-wait cancellation: expected 2 to be 1 // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/retry-after-abort.test.ts:37:87
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: Abort must interrupt header-derived wait: Thu, 01 Jan 1970 00:00:01 GMT: expected undefined to be defined
    at /home/runner/work/http-resilience/http-resilience/test/conformance/retry-after-abort.test.ts:30:85
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: No dispatch after header-wait cancellation: expected 2 to be 1 // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/retry-after-abort.test.ts:37:87
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: Abort must interrupt header-derived wait: bad: expected undefined to be defined
    at /home/runner/work/http-resilience/http-resilience/test/conformance/retry-after-abort.test.ts:30:85
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: No dispatch after header-wait cancellation: expected 2 to be 1 // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/retry-after-abort.test.ts:37:87
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: Abort must interrupt header-derived wait: 1000: expected undefined to be defined
    at /home/runner/work/http-resilience/http-resilience/test/conformance/retry-after-abort.test.ts:30:85
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: No dispatch after header-wait cancellation: expected 2 to be 1 // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/retry-after-abort.test.ts:37:87
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

Failure trace

Retry-After + abort / fetch-smartly - PASS

Configuration: 503 (429 for fetch-smartly); 1 retry; Retry-After seconds/date/invalid/large; documented delay caps; abort at 20ms; original parsed SmartFetchResponse result; normal timeout 60000ms

Expected: Correct header wait or documented cap/fallback; exact caller abort error; prompt settlement; no subsequent dispatch; no leftover transport timers

Retry-After + abort / @resili/fetch - FAIL

Configuration: 503 (429 for fetch-smartly); 1 retry; Retry-After seconds/date/invalid/large; documented delay caps; abort at 20ms; maxAttempts=retries+1; circuit outside hedge

Expected: Correct header wait or documented cap/fallback; exact caller abort error; prompt settlement; no subsequent dispatch; no leftover transport timers

AssertionError: Retry-After must control retry timing: 1: expected 2 to be 1 // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/retry-after-abort.test.ts:40:92
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: Abort must interrupt header-derived wait: 1: expected undefined to be defined
    at /home/runner/work/http-resilience/http-resilience/test/conformance/retry-after-abort.test.ts:30:85
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: Retry-After must control retry timing: Thu, 01 Jan 1970 00:00:01 GMT: expected 2 to be 1 // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/retry-after-abort.test.ts:40:92
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: Abort must interrupt header-derived wait: Thu, 01 Jan 1970 00:00:01 GMT: expected undefined to be defined
    at /home/runner/work/http-resilience/http-resilience/test/conformance/retry-after-abort.test.ts:30:85
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: Abort must interrupt header-derived wait: bad: expected undefined to be defined
    at /home/runner/work/http-resilience/http-resilience/test/conformance/retry-after-abort.test.ts:30:85
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: Retry-After must control retry timing: 1000: expected 2 to be 1 // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/retry-after-abort.test.ts:40:92
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: Abort must interrupt header-derived wait: 1000: expected undefined to be defined
    at /home/runner/work/http-resilience/http-resilience/test/conformance/retry-after-abort.test.ts:30:85
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

Failure trace

Retry-After + abort / fetch-resilience - N/A

Configuration: Not applicable

Expected: No Retry-After handling is offered by this package.

Retry-After + abort / flowshield - N/A

Configuration: Not applicable

Expected: No Retry-After handling is offered by this package.

Retry-After + abort / ts-retry-circuit - N/A

Configuration: Not applicable

Expected: No Retry-After handling is offered by this package.

Retry + throwing hooks / ffetch - PASS

Configuration: 503 then healthy response; 2 retries configured; throw/reject from supported predicate/delay/retry callback

Expected: Sentinel error preserved by identity; one transport attempt; no late retry; same client accepts healthy follow-up

Retry + throwing hooks / ky - PASS

Configuration: 503 then healthy response; 2 retries configured; throw/reject from supported predicate/delay/retry callback

Expected: Sentinel error preserved by identity; one transport attempt; no late retry; same client accepts healthy follow-up

Retry + throwing hooks / fetch-retry - PASS

Configuration: 503 then healthy response; 2 retries configured; throw/reject from supported predicate/delay/retry callback

Expected: Sentinel error preserved by identity; one transport attempt; no late retry; same client accepts healthy follow-up

Retry + throwing hooks / ofetch - PASS

Configuration: 503 then healthy response; 2 retries configured; throw/reject from supported predicate/delay/retry callback

Expected: Sentinel error preserved by identity; one transport attempt; no late retry; same client accepts healthy follow-up

Retry + throwing hooks / wretch - FAIL

Configuration: 503 then healthy response; 2 retries configured; throw/reject from supported predicate/delay/retry callback; retry middleware resolves final response to Wretch HTTP handling; omit retry middleware for zero budget

Expected: Sentinel error preserved by identity; one transport attempt; no late retry; same client accepts healthy follow-up

AssertionError: callback: callback rejection must settle the caller: expected undefined to be defined
    at /home/runner/work/http-resilience/http-resilience/test/conformance/retry-hook-error.test.ts:19:92
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: async-callback: callback rejection must settle the caller: expected undefined to be defined
    at /home/runner/work/http-resilience/http-resilience/test/conformance/retry-hook-error.test.ts:19:92
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

Failure trace

Retry + throwing hooks / resilient-fetch-client - N/A

Configuration: Not applicable

Expected: No configurable retry predicate, delay function or retry callback is exposed.

Retry + throwing hooks / fetch-smartly - PASS

Configuration: 503 then healthy response; 2 retries configured; throw/reject from supported predicate/delay/retry callback; original parsed SmartFetchResponse result; normal timeout 60000ms

Expected: Sentinel error preserved by identity; one transport attempt; no late retry; same client accepts healthy follow-up

Retry + throwing hooks / @resili/fetch - PASS

Configuration: 503 then healthy response; 2 retries configured; throw/reject from supported predicate/delay/retry callback; maxAttempts=retries+1; circuit outside hedge

Expected: Sentinel error preserved by identity; one transport attempt; no late retry; same client accepts healthy follow-up

Retry + throwing hooks / fetch-resilience - N/A

Configuration: Not applicable

Expected: No configurable retry predicate, delay function or retry callback is exposed.

Retry + throwing hooks / flowshield - PASS

Configuration: 503 then healthy response; 2 retries configured; throw/reject from supported predicate/delay/retry callback; HTTP operation throws HttpStatusError; circuit outside hedge; retry omitted for zero budget

Expected: Sentinel error preserved by identity; one transport attempt; no late retry; same client accepts healthy follow-up

Retry + throwing hooks / ts-retry-circuit - PASS

Configuration: 503 then healthy response; 2 retries configured; throw/reject from supported predicate/delay/retry callback; public createCircuitFetch; full-jitter exponential backoff; deterministic Math.random=0.5 in scripted tests

Expected: Sentinel error preserved by identity; one transport attempt; no late retry; same client accepts healthy follow-up

Hedge + all branches fail / ffetch - PASS

Configuration: Primary and one hedge after 10ms; distinct TypeErrors; completion at 20/60ms or 30/50ms; no retries

Expected: Two attempts; exact terminal error/cause: ffetch last RetryLimitError -> original TypeError, Resili last original error, flowshield primary original error; no leaked work

Hedge + all branches fail / ky - N/A

Configuration: Not applicable

Expected: No hedging policy is offered.

Hedge + all branches fail / fetch-retry - N/A

Configuration: Not applicable

Expected: No hedging policy is offered.

Hedge + all branches fail / ofetch - N/A

Configuration: Not applicable

Expected: No hedging policy is offered.

Hedge + all branches fail / wretch - N/A

Configuration: Not applicable

Expected: No hedging policy is offered.

Hedge + all branches fail / resilient-fetch-client - N/A

Configuration: Not applicable

Expected: No hedging policy is offered.

Hedge + all branches fail / fetch-smartly - N/A

Configuration: Not applicable

Expected: No hedging policy is offered.

Hedge + all branches fail / @resili/fetch - PASS

Configuration: Primary and one hedge after 10ms; distinct TypeErrors; completion at 20/60ms or 30/50ms; no retries; maxAttempts=retries+1; circuit outside hedge

Expected: Two attempts; exact terminal error/cause: ffetch last RetryLimitError -> original TypeError, Resili last original error, flowshield primary original error; no leaked work

Hedge + all branches fail / fetch-resilience - N/A

Configuration: Not applicable

Expected: No hedging policy is offered.

Hedge + all branches fail / flowshield - PASS

Configuration: Primary and one hedge after 10ms; distinct TypeErrors; completion at 20/60ms or 30/50ms; no retries; HTTP operation throws HttpStatusError; circuit outside hedge; retry omitted for zero budget

Expected: Two attempts; exact terminal error/cause: ffetch last RetryLimitError -> original TypeError, Resili last original error, flowshield primary original error; no leaked work

Hedge + all branches fail / ts-retry-circuit - N/A

Configuration: Not applicable

Expected: No hedging policy is offered.

Hedge + timeout / ffetch - PASS

Configuration: Hedge delay 10ms; timeout 5/10/11/100ms; primary/hedge hang; no retries; healthy follow-up

Expected: Exact timeout error/wrapper; deadline settlement; no dispatch at/after deadline; cooperative branches stop; no late hedge; same client recovers

Hedge + timeout / ky - N/A

Configuration: Not applicable

Expected: No hedging policy is offered.

Hedge + timeout / fetch-retry - N/A

Configuration: Not applicable

Expected: No hedging policy is offered.

Hedge + timeout / ofetch - N/A

Configuration: Not applicable

Expected: No hedging policy is offered.

Hedge + timeout / wretch - N/A

Configuration: Not applicable

Expected: No hedging policy is offered.

Hedge + timeout / resilient-fetch-client - N/A

Configuration: Not applicable

Expected: No hedging policy is offered.

Hedge + timeout / fetch-smartly - N/A

Configuration: Not applicable

Expected: No hedging policy is offered.

Hedge + timeout / @resili/fetch - PASS

Configuration: Hedge delay 10ms; timeout 5/10/11/100ms; primary/hedge hang; no retries; healthy follow-up; maxAttempts=retries+1; circuit outside hedge

Expected: Exact timeout error/wrapper; deadline settlement; no dispatch at/after deadline; cooperative branches stop; no late hedge; same client recovers

Hedge + timeout / fetch-resilience - N/A

Configuration: Not applicable

Expected: No hedging policy is offered.

Hedge + timeout / flowshield - FAIL

Configuration: Hedge delay 10ms; timeout 5/10/11/100ms; primary/hedge hang; no retries; healthy follow-up; HTTP operation throws HttpStatusError; circuit outside hedge; retry omitted for zero budget

Expected: Exact timeout error/wrapper; deadline settlement; no dispatch at/after deadline; cooperative branches stop; no late hedge; same client recovers

AssertionError: No late hedge at deadline 5: expected 2 to be 1 // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/hedge-timeout.test.ts:32:79
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: expected false to be true // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/hedge-timeout.test.ts:35:82
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: All cooperative branches must stop: expected 1 to be +0 // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/hedge-timeout.test.ts:36:81
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: No late hedge at deadline 10: expected 2 to be 1 // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/hedge-timeout.test.ts:32:79
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: expected false to be true // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/hedge-timeout.test.ts:35:82
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: All cooperative branches must stop: expected 1 to be +0 // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/hedge-timeout.test.ts:36:81
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: All cooperative branches must stop: expected 2 to be +0 // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/hedge-timeout.test.ts:36:81
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: All cooperative branches must stop: expected 2 to be +0 // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/hedge-timeout.test.ts:36:81
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

Failure trace

Hedge + timeout / ts-retry-circuit - N/A

Configuration: Not applicable

Expected: No hedging policy is offered.

Dedupe + retry / ffetch - PASS

Configuration: 4 same-key GET callers; dedupe outside retry (Resili public policy order 150); two delayed 503s then streamed ready; 2 retries; delay 20ms; fresh same-key follow-up

Expected: Exactly 3 shared transport attempts; every caller settles with 200 and independently usable body; registry cleans up and follow-up dispatches once

Dedupe + retry / ky - N/A

Configuration: Not applicable

Expected: No request deduplication policy/helper is offered.

Dedupe + retry / fetch-retry - N/A

Configuration: Not applicable

Expected: No request deduplication policy/helper is offered.

Dedupe + retry / ofetch - N/A

Configuration: Not applicable

Expected: No request deduplication policy/helper is offered.

Dedupe + retry / wretch - PASS

Configuration: 4 same-key GET callers; dedupe outside retry (Resili public policy order 150); two delayed 503s then streamed ready; 2 retries; delay 20ms; fresh same-key follow-up; retry middleware resolves final response to Wretch HTTP handling; omit retry middleware for zero budget

Expected: Exactly 3 shared transport attempts; every caller settles with 200 and independently usable body; registry cleans up and follow-up dispatches once

Dedupe + retry / resilient-fetch-client - N/A

Configuration: Not applicable

Expected: No request deduplication policy/helper is offered.

Dedupe + retry / fetch-smartly - PASS

Configuration: 4 same-key GET callers; dedupe outside retry (Resili public policy order 150); two delayed 503s then streamed ready; 2 retries; delay 20ms; fresh same-key follow-up; original parsed SmartFetchResponse result; normal timeout 60000ms

Expected: Exactly 3 shared transport attempts; every caller settles with 200 and independently usable body; registry cleans up and follow-up dispatches once

Dedupe + retry / @resili/fetch - FAIL

Expected: Exactly 3 shared transport attempts; every caller settles with 200 and independently usable body; registry cleans up and follow-up dispatches once

AssertionError: expected { ok: false, …(1) } to deeply equal { ok: true, value: 'ready' }
    at /home/runner/work/http-resilience/http-resilience/test/conformance/dedupe-retry.test.ts:25:69
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: expected { ok: false, …(1) } to deeply equal { ok: true, value: 'ready' }
    at /home/runner/work/http-resilience/http-resilience/test/conformance/dedupe-retry.test.ts:25:69
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: expected { ok: false, …(1) } to deeply equal { ok: true, value: 'ready' }
    at /home/runner/work/http-resilience/http-resilience/test/conformance/dedupe-retry.test.ts:25:69
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

Failure trace

Dedupe + retry / fetch-resilience - N/A

Configuration: Not applicable

Expected: No request deduplication policy/helper is offered.

Dedupe + retry / flowshield - N/A

Configuration: Not applicable

Expected: No request deduplication policy/helper is offered.

Dedupe + retry / ts-retry-circuit - N/A

Configuration: Not applicable

Expected: No request deduplication policy/helper is offered.

Dedupe + caller cancellation / ffetch - PASS

Configuration: Two same-key callers with distinct controllers; cancel follower/owner/all at 20ms; response at 100ms; fresh same-key follow-up

Expected: Exact ownership: ffetch follower detaches but owner abort cancels shared work; Resili subscribers detach independently, preserve the caller DOMException reason, and final detach aborts shared work; wretch/Smart DedupManager share owner's promise and ignore follower signal; no stranded caller; fresh call works

Dedupe + caller cancellation / ky - N/A

Configuration: Not applicable

Expected: No request deduplication policy/helper is offered.

Dedupe + caller cancellation / fetch-retry - N/A

Configuration: Not applicable

Expected: No request deduplication policy/helper is offered.

Dedupe + caller cancellation / ofetch - N/A

Configuration: Not applicable

Expected: No request deduplication policy/helper is offered.

Dedupe + caller cancellation / wretch - PASS

Configuration: Two same-key callers with distinct controllers; cancel follower/owner/all at 20ms; response at 100ms; fresh same-key follow-up; retry middleware resolves final response to Wretch HTTP handling; omit retry middleware for zero budget

Dedupe + caller cancellation / resilient-fetch-client - N/A

Configuration: Not applicable

Expected: No request deduplication policy/helper is offered.

Dedupe + caller cancellation / fetch-smartly - PASS

Configuration: Two same-key callers with distinct controllers; cancel follower/owner/all at 20ms; response at 100ms; fresh same-key follow-up; original parsed SmartFetchResponse result; normal timeout 60000ms

Dedupe + caller cancellation / @resili/fetch - PASS

Configuration: Two same-key callers with distinct controllers; cancel follower/owner/all at 20ms; response at 100ms; fresh same-key follow-up; maxAttempts=retries+1; circuit outside hedge

Dedupe + caller cancellation / fetch-resilience - N/A

Configuration: Not applicable

Expected: No request deduplication policy/helper is offered.

Dedupe + caller cancellation / flowshield - N/A

Configuration: Not applicable

Expected: No request deduplication policy/helper is offered.

Dedupe + caller cancellation / ts-retry-circuit - N/A

Configuration: Not applicable

Expected: No request deduplication policy/helper is offered.

Bulkhead + retry / ffetch - PASS

Configuration: Capacity 1; queue 1; one retry; 100ms backoff; concurrent A/B; success and exhaustion; fresh C

Expected: Never exceed one transport attempt at once; ffetch holds the logical-request slot (A,A,B), others release during backoff (A,B,A); exact exhaustion outcome; no deadlock/leaked capacity

Bulkhead + retry / ky - N/A

Configuration: Not applicable

Expected: No queued bulkhead is exposed; immediate capacity rejection is a different contract.

Bulkhead + retry / fetch-retry - N/A

Configuration: Not applicable

Expected: No queued bulkhead is exposed; immediate capacity rejection is a different contract.

Bulkhead + retry / ofetch - N/A

Configuration: Not applicable

Expected: No queued bulkhead is exposed; immediate capacity rejection is a different contract.

Bulkhead + retry / wretch - N/A

Configuration: Not applicable

Expected: No queued bulkhead is exposed; immediate capacity rejection is a different contract.

Bulkhead + retry / resilient-fetch-client - PASS

Configuration: Capacity 1; queue 1; one retry; 100ms backoff; concurrent A/B; success and exhaustion; fresh C; published backoff with initial/max delay configured; deterministic Math.random=0.5

Expected: Never exceed one transport attempt at once; ffetch holds the logical-request slot (A,A,B), others release during backoff (A,B,A); exact exhaustion outcome; no deadlock/leaked capacity

Bulkhead + retry / fetch-smartly - N/A

Configuration: Not applicable

Expected: No queued bulkhead is exposed; immediate capacity rejection is a different contract.

Bulkhead + retry / @resili/fetch - PASS

Configuration: Capacity 1; queue 1; one retry; 100ms backoff; concurrent A/B; success and exhaustion; fresh C; maxAttempts=retries+1; circuit outside hedge

Expected: Never exceed one transport attempt at once; ffetch holds the logical-request slot (A,A,B), others release during backoff (A,B,A); exact exhaustion outcome; no deadlock/leaked capacity

Bulkhead + retry / fetch-resilience - PASS

Configuration: Capacity 1; queue 1; one retry; 100ms backoff; concurrent A/B; success and exhaustion; fresh C

Expected: Never exceed one transport attempt at once; ffetch holds the logical-request slot (A,A,B), others release during backoff (A,B,A); exact exhaustion outcome; no deadlock/leaked capacity

Bulkhead + retry / flowshield - PASS

Configuration: Capacity 1; queue 1; one retry; 100ms backoff; concurrent A/B; success and exhaustion; fresh C; HTTP operation throws HttpStatusError; circuit outside hedge; retry omitted for zero budget

Expected: Never exceed one transport attempt at once; ffetch holds the logical-request slot (A,A,B), others release during backoff (A,B,A); exact exhaustion outcome; no deadlock/leaked capacity

Bulkhead + retry / ts-retry-circuit - N/A

Configuration: Not applicable

Expected: No queued bulkhead is exposed; immediate capacity rejection is a different contract.

Circuit + retry accounting / ffetch - PASS

Configuration: Circuit threshold 2; 2 retries; repeated 503; explicit circuit outside retry except resilient-fetch-client/Resili native attempt accounting

Expected: Attempt-counting circuits dispatch twice then refuse; logical-counting circuits permit 3 attempts per request and trip after 2 requests; exact trip-point and subsequent refusal errors

Circuit + retry accounting / ky - N/A

Configuration: Not applicable

Expected: No circuit breaker policy/helper is offered.

Circuit + retry accounting / fetch-retry - N/A

Configuration: Not applicable

Expected: No circuit breaker policy/helper is offered.

Circuit + retry accounting / ofetch - N/A

Configuration: Not applicable

Expected: No circuit breaker policy/helper is offered.

Circuit + retry accounting / wretch - N/A

Configuration: Not applicable

Expected: No circuit breaker policy/helper is offered.

Circuit + retry accounting / resilient-fetch-client - PASS

Configuration: Circuit threshold 2; 2 retries; repeated 503; explicit circuit outside retry except resilient-fetch-client/Resili native attempt accounting; published backoff with initial/max delay configured; deterministic Math.random=0.5

Expected: Attempt-counting circuits dispatch twice then refuse; logical-counting circuits permit 3 attempts per request and trip after 2 requests; exact trip-point and subsequent refusal errors

Circuit + retry accounting / fetch-smartly - PASS

Configuration: Circuit threshold 2; 2 retries; repeated 503; explicit circuit outside retry except resilient-fetch-client/Resili native attempt accounting; original parsed SmartFetchResponse result; normal timeout 60000ms

Expected: Attempt-counting circuits dispatch twice then refuse; logical-counting circuits permit 3 attempts per request and trip after 2 requests; exact trip-point and subsequent refusal errors

Circuit + retry accounting / @resili/fetch - PASS

Configuration: Circuit threshold 2; 2 retries; repeated 503; explicit circuit outside retry except resilient-fetch-client/Resili native attempt accounting; maxAttempts=retries+1; circuit outside hedge

Expected: Attempt-counting circuits dispatch twice then refuse; logical-counting circuits permit 3 attempts per request and trip after 2 requests; exact trip-point and subsequent refusal errors

Circuit + retry accounting / fetch-resilience - PASS

Configuration: Circuit threshold 2; 2 retries; repeated 503; explicit circuit outside retry except resilient-fetch-client/Resili native attempt accounting

Expected: Attempt-counting circuits dispatch twice then refuse; logical-counting circuits permit 3 attempts per request and trip after 2 requests; exact trip-point and subsequent refusal errors

Circuit + retry accounting / flowshield - PASS

Configuration: Circuit threshold 2; 2 retries; repeated 503; explicit circuit outside retry except resilient-fetch-client/Resili native attempt accounting; HTTP operation throws HttpStatusError; circuit outside hedge; retry omitted for zero budget

Expected: Attempt-counting circuits dispatch twice then refuse; logical-counting circuits permit 3 attempts per request and trip after 2 requests; exact trip-point and subsequent refusal errors

Circuit + retry accounting / ts-retry-circuit - PASS

Configuration: Circuit threshold 2; 2 retries; repeated 503; explicit circuit outside retry except resilient-fetch-client/Resili native attempt accounting; public createCircuitFetch; full-jitter exponential backoff; deterministic Math.random=0.5 in scripted tests

Expected: Attempt-counting circuits dispatch twice then refuse; logical-counting circuits permit 3 attempts per request and trip after 2 requests; exact trip-point and subsequent refusal errors

Circuit + half-open concurrency / ffetch - FAIL

Configuration: Threshold 1; reset 100 ms; zero retries. Single probe, queued followers (Cockatiel), or unrestricted probes per contract. fetch-smartly public circuit helper wraps fetchWithRetry.

Expected: No dispatch before reset; admit at deadline; exact refusal errors; failed probes restart cooldown; late success cannot close a reopened circuit; healthy recovery.

AssertionError: late success must not close the newer open state: expected false to be true // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/circuit-half-open-concurrency.test.ts:129:59
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

Failure trace

Circuit + half-open concurrency / ky - N/A

Configuration: Not applicable

Expected: No circuit breaker policy/helper is offered.

Circuit + half-open concurrency / fetch-retry - N/A

Configuration: Not applicable

Expected: No circuit breaker policy/helper is offered.

Circuit + half-open concurrency / ofetch - N/A

Configuration: Not applicable

Expected: No circuit breaker policy/helper is offered.

Circuit + half-open concurrency / wretch - N/A

Configuration: Not applicable

Expected: No circuit breaker policy/helper is offered.

Circuit + half-open concurrency / resilient-fetch-client - PASS

Configuration: Threshold 1; reset 100 ms; zero retries. Single probe, queued followers (Cockatiel), or unrestricted probes per contract. fetch-smartly public circuit helper wraps fetchWithRetry.; published backoff with initial/max delay configured; deterministic Math.random=0.5

Expected: No dispatch before reset; admit at deadline; exact refusal errors; failed probes restart cooldown; late success cannot close a reopened circuit; healthy recovery.

Circuit + half-open concurrency / fetch-smartly - FAIL

Configuration: Threshold 1; reset 100 ms; zero retries. Single probe, queued followers (Cockatiel), or unrestricted probes per contract. fetch-smartly public circuit helper wraps fetchWithRetry.; original parsed SmartFetchResponse result; normal timeout 60000ms

Expected: No dispatch before reset; admit at deadline; exact refusal errors; failed probes restart cooldown; late success cannot close a reopened circuit; healthy recovery.

AssertionError: late success must not admit during the new cooldown: expected true to be false // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/circuit-half-open-concurrency.test.ts:132:93
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: late success must not consume the recovery response: expected 4 to be 3 // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/circuit-half-open-concurrency.test.ts:134:88
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

Failure trace

Circuit + half-open concurrency / @resili/fetch - PASS

Expected: No dispatch before reset; admit at deadline; exact refusal errors; failed probes restart cooldown; late success cannot close a reopened circuit; healthy recovery.

Circuit + half-open concurrency / fetch-resilience - PASS

Configuration: Threshold 1; reset 100 ms; zero retries. Single probe, queued followers (Cockatiel), or unrestricted probes per contract. fetch-smartly public circuit helper wraps fetchWithRetry.

Expected: No dispatch before reset; admit at deadline; exact refusal errors; failed probes restart cooldown; late success cannot close a reopened circuit; healthy recovery.

Circuit + half-open concurrency / flowshield - PASS

Configuration: Threshold 1; reset 100 ms; zero retries. Single probe, queued followers (Cockatiel), or unrestricted probes per contract. fetch-smartly public circuit helper wraps fetchWithRetry.; HTTP operation throws HttpStatusError; circuit outside hedge; retry omitted for zero budget

Expected: No dispatch before reset; admit at deadline; exact refusal errors; failed probes restart cooldown; late success cannot close a reopened circuit; healthy recovery.

Circuit + half-open concurrency / ts-retry-circuit - FAIL

Configuration: Threshold 1; reset 100 ms; zero retries. Single probe, queued followers (Cockatiel), or unrestricted probes per contract. fetch-smartly public circuit helper wraps fetchWithRetry.; public createCircuitFetch; full-jitter exponential backoff; deterministic Math.random=0.5 in scripted tests

Expected: No dispatch before reset; admit at deadline; exact refusal errors; failed probes restart cooldown; late success cannot close a reopened circuit; healthy recovery.

AssertionError: admit at the exact reset deadline: expected 1 to be 2 // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/circuit-half-open-concurrency.test.ts:56:72
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: new cooldown expires at its deadline: expected 2 to be 3 // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/circuit-half-open-concurrency.test.ts:87:75
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: stale variant reset boundary: expected 2 to be 3 // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/circuit-half-open-concurrency.test.ts:117:65
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: late success must not admit during the new cooldown: expected true to be false // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/circuit-half-open-concurrency.test.ts:132:93
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: late success must not consume the recovery response: expected 4 to be 3 // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/circuit-half-open-concurrency.test.ts:134:88
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

Failure trace

Circuit + local cancellation / ffetch - PASS

Configuration: Reset 10000 ms. Active-fetch variant: threshold 1, no retries. Backoff variant: threshold 2, one retry, delay 100 ms; count preceding 503 at declared attempt/logical boundary.

Expected: Exact abort error/reason; prompt settlement and no late dispatch. Abort excluded as failure by classified circuits (Resili still records a nonfailure sample in its rate window); generic all-error policies and fetch-smartly public helper count it. Trip at the exact remaining real-failure budget; exact refusal; healthy recovery.

Circuit + local cancellation / ky - N/A

Configuration: Not applicable

Expected: No circuit breaker policy/helper is offered.

Circuit + local cancellation / fetch-retry - N/A

Configuration: Not applicable

Expected: No circuit breaker policy/helper is offered.

Circuit + local cancellation / ofetch - N/A

Configuration: Not applicable

Expected: No circuit breaker policy/helper is offered.

Circuit + local cancellation / wretch - N/A

Configuration: Not applicable

Expected: No circuit breaker policy/helper is offered.

Circuit + local cancellation / resilient-fetch-client - FAIL

Configuration: Reset 10000 ms. Active-fetch variant: threshold 1, no retries. Backoff variant: threshold 2, one retry, delay 100 ms; count preceding 503 at declared attempt/logical boundary.; published backoff with initial/max delay configured; deterministic Math.random=0.5

AssertionError: backoff cancellation must settle promptly: expected undefined to be defined
    at /home/runner/work/http-resilience/http-resilience/test/conformance/circuit-local-cancellation.test.ts:67:79
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: no dispatch after backoff cancellation: expected 2 to be 1 // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/circuit-local-cancellation.test.ts:71:84
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

Failure trace

Circuit + local cancellation / fetch-smartly - PASS

Configuration: Reset 10000 ms. Active-fetch variant: threshold 1, no retries. Backoff variant: threshold 2, one retry, delay 100 ms; count preceding 503 at declared attempt/logical boundary.; original parsed SmartFetchResponse result; normal timeout 60000ms

Circuit + local cancellation / @resili/fetch - FAIL

AssertionError: backoff cancellation must settle promptly: expected undefined to be defined
    at /home/runner/work/http-resilience/http-resilience/test/conformance/circuit-local-cancellation.test.ts:67:79
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

Failure trace

Circuit + local cancellation / fetch-resilience - FAIL

Configuration: Reset 10000 ms. Active-fetch variant: threshold 1, no retries. Backoff variant: threshold 2, one retry, delay 100 ms; count preceding 503 at declared attempt/logical boundary.

AssertionError: backoff cancellation must settle promptly: expected undefined to be defined
    at /home/runner/work/http-resilience/http-resilience/test/conformance/circuit-local-cancellation.test.ts:67:79
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

AssertionError: no dispatch after backoff cancellation: expected 2 to be 1 // Object.is equality
    at /home/runner/work/http-resilience/http-resilience/test/conformance/circuit-local-cancellation.test.ts:71:84
    at file:///home/runner/work/http-resilience/http-resilience/node_modules/vitest/dist/chunks/run.BTlFXlnv.js:2783:20

Failure trace

Circuit + local cancellation / flowshield - PASS

Configuration: Reset 10000 ms. Active-fetch variant: threshold 1, no retries. Backoff variant: threshold 2, one retry, delay 100 ms; count preceding 503 at declared attempt/logical boundary.; HTTP operation throws HttpStatusError; circuit outside hedge; retry omitted for zero budget

Circuit + local cancellation / ts-retry-circuit - PASS

Configuration: Reset 10000 ms. Active-fetch variant: threshold 1, no retries. Backoff variant: threshold 2, one retry, delay 100 ms; count preceding 503 at declared attempt/logical boundary.; public createCircuitFetch; full-jitter exponential backoff; deterministic Math.random=0.5 in scripted tests