test(abort): Add AbortSignal.any advanced tests

[tennisleng]

Splitting #25341: Advanced scenarios (events, timeouts, nested).

[coderabbitai]

Walkthrough

Adds a comprehensive test suite that verifies AbortSignal.any() behavior: empty and multiple inputs, already-aborted signals, reason propagation, abort event semantics and ordering, nested compositions, and interactions with timeout-based signals.

Changes

Cohort / File(s)	Change Summary
Test Suite for AbortSignal.any() test/js/web/abort/abort-signal-any.test.ts	Adds tests exercising basic behavior (empty input, single/multiple signals), already-aborted inputs, propagation of various abort reasons (including DOMException AbortError), abort event firing and ordering, nested AbortSignal.any() usage, and interactions with AbortSignal.timeout() including TimeoutError vs. manual abort precedence.

Pre-merge checks

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description is largely incomplete, missing required sections from the template (What does this PR do?, How did you verify your code works?).	Add the missing template sections: provide a detailed explanation of what the PR does and describe how the code was verified (e.g., test execution results).

✅ Passed checks (1 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately summarizes the main change: adding advanced tests for AbortSignal.any covering events, timeouts, and nested scenarios.

---

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📥 Commits

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📒 Files selected for processing (1)

• test/js/web/abort/abort-signal-any.test.ts (1 hunks)

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📓 Path-based instructions (3)

test/**/*.{js,ts,jsx,tsx}

📄 CodeRabbit inference engine (.cursor/rules/writing-tests.mdc)

test/**/*.{js,ts,jsx,tsx}: Write tests as JavaScript and TypeScript files using Jest-style APIs (test, describe, expect) and import from bun:test
Use test.each and data-driven tests to reduce boilerplate when testing multiple similar cases

Files:

• test/js/web/abort/abort-signal-any.test.ts

test/**/*.test.{ts,js,jsx,tsx,mjs,cjs}

📄 CodeRabbit inference engine (test/CLAUDE.md)

test/**/*.test.{ts,js,jsx,tsx,mjs,cjs}: Use bun:test with files that end in *.test.{ts,js,jsx,tsx,mjs,cjs}
Do not write flaky tests. Never wait for time to pass in tests; always wait for the condition to be met instead of using an arbitrary amount of time
Never use hardcoded port numbers in tests. Always use port: 0 to get a random port
Prefer concurrent tests over sequential tests using test.concurrent or describe.concurrent when multiple tests spawn processes or write files, unless it's very difficult to make them concurrent
When spawning Bun processes in tests, use bunExe and bunEnv from harness to ensure the same build of Bun is used and debug logging is silenced
Use -e flag for single-file tests when spawning Bun processes
Use tempDir() from harness to create temporary directories with files for multi-file tests instead of creating files manually
Prefer async/await over callbacks in tests
When callbacks must be used and it's just a single callback, use Promise.withResolvers to create a promise that can be resolved or rejected from a callback
Do not set a timeout on tests. Bun already has timeouts
Use Buffer.alloc(count, fill).toString() instead of 'A'.repeat(count) to create repetitive strings in tests, as ''.repeat is very slow in debug JavaScriptCore builds
Use describe blocks for grouping related tests
Always use await using or using to ensure proper resource cleanup in tests for APIs like Bun.listen, Bun.connect, Bun.spawn, Bun.serve, etc
Always check exit codes and test error scenarios in error tests
Use describe.each() for parameterized tests
Use toMatchSnapshot() for snapshot testing
Use beforeAll(), afterEach(), beforeEach() for setup/teardown in tests
Track resources (servers, clients) in arrays for cleanup in afterEach()

Files:

• test/js/web/abort/abort-signal-any.test.ts

test/**/*.test.{ts,tsx}

📄 CodeRabbit inference engine (CLAUDE.md)

test/**/*.test.{ts,tsx}: For single-file tests in Bun test suite, prefer using -e flag over tempDir
For multi-file tests in Bun test suite, prefer using tempDir and Bun.spawn
Always use port: 0 when spawning servers in tests - do not hardcode ports or use custom random port functions
Use normalizeBunSnapshot to normalize snapshot output in tests instead of manual output comparison
Never write tests that check for no 'panic', 'uncaught exception', or similar strings in test output - that is not a valid test
Use tempDir from harness to create temporary directories in tests - do not use tmpdirSync or fs.mkdtempSync
In tests, call expect(stdout).toBe(...) before expect(exitCode).toBe(0) when spawning processes for more useful error messages on failure
Do not write flaky tests - do not use setTimeout in tests; instead await the condition to be met since you're testing the CONDITION, not TIME PASSING
Verify your test fails with USE_SYSTEM_BUN=1 bun test <file> and passes with bun bd test <file> - tests are not valid if they pass with USE_SYSTEM_BUN=1
Avoid shell commands in tests - do not use find or grep; use Bun's Glob and built-in tools instead
Test files must end in .test.ts or .test.tsx and be created in the appropriate test folder structure

Files:

• test/js/web/abort/abort-signal-any.test.ts

🧠 Learnings (19)

📚 Learning: 2025-11-24T18:37:30.259Z

Learnt from: CR
Repo: oven-sh/bun PR: 0
File: test/CLAUDE.md:0-0
Timestamp: 2025-11-24T18:37:30.259Z
Learning: Applies to test/**/*.test.{ts,js,jsx,tsx,mjs,cjs} : Prefer async/await over callbacks in tests

Applied to files:

• test/js/web/abort/abort-signal-any.test.ts

📚 Learning: 2025-11-24T18:37:30.259Z

Learnt from: CR
Repo: oven-sh/bun PR: 0
File: test/CLAUDE.md:0-0
Timestamp: 2025-11-24T18:37:30.259Z
Learning: Applies to test/**/*.test.{ts,js,jsx,tsx,mjs,cjs} : Always check exit codes and test error scenarios in error tests

Applied to files:

• test/js/web/abort/abort-signal-any.test.ts

📚 Learning: 2025-11-24T18:35:50.422Z

Learnt from: CR
Repo: oven-sh/bun PR: 0
File: .cursor/rules/writing-tests.mdc:0-0
Timestamp: 2025-11-24T18:35:50.422Z
Learning: See `test/harness.ts` for common test utilities and helpers

Applied to files:

• test/js/web/abort/abort-signal-any.test.ts

📚 Learning: 2025-09-03T01:30:58.001Z

Learnt from: markovejnovic
Repo: oven-sh/bun PR: 21728
File: test/js/valkey/valkey.test.ts:264-271
Timestamp: 2025-09-03T01:30:58.001Z
Learning: For test/js/valkey/valkey.test.ts PUB/SUB tests, avoid arbitrary sleeps and async-forEach. Instead, resolve a Promise from the subscriber callback when the expected number of messages is observed and await it with a bounded timeout (e.g., withTimeout + Promise.withResolvers) to account for Redis server→subscriber propagation.

Applied to files:

• test/js/web/abort/abort-signal-any.test.ts

📚 Learning: 2025-12-02T05:59:51.485Z

Learnt from: CR
Repo: oven-sh/bun PR: 0
File: CLAUDE.md:0-0
Timestamp: 2025-12-02T05:59:51.485Z
Learning: Applies to test/**/*.test.{ts,tsx} : Never write tests that check for no 'panic', 'uncaught exception', or similar strings in test output - that is not a valid test

Applied to files:

• test/js/web/abort/abort-signal-any.test.ts

📚 Learning: 2025-11-24T18:37:30.259Z

Learnt from: CR
Repo: oven-sh/bun PR: 0
File: test/CLAUDE.md:0-0
Timestamp: 2025-11-24T18:37:30.259Z
Learning: Applies to test/**/*.test.{ts,js,jsx,tsx,mjs,cjs} : Do not write flaky tests. Never wait for time to pass in tests; always wait for the condition to be met instead of using an arbitrary amount of time

Applied to files:

• test/js/web/abort/abort-signal-any.test.ts

📚 Learning: 2025-12-02T05:59:51.485Z

Learnt from: CR
Repo: oven-sh/bun PR: 0
File: CLAUDE.md:0-0
Timestamp: 2025-12-02T05:59:51.485Z
Learning: Applies to test/**/*.test.{ts,tsx} : Do not write flaky tests - do not use `setTimeout` in tests; instead `await` the condition to be met since you're testing the CONDITION, not TIME PASSING

Applied to files:

• test/js/web/abort/abort-signal-any.test.ts

📚 Learning: 2025-09-20T00:57:56.685Z

Learnt from: markovejnovic
Repo: oven-sh/bun PR: 22568
File: test/js/valkey/valkey.test.ts:268-276
Timestamp: 2025-09-20T00:57:56.685Z
Learning: For test/js/valkey/valkey.test.ts, do not comment on synchronous throw assertions for async Redis methods like ctx.redis.set() - the maintainer has explicitly requested to stop looking at this error pattern.

Applied to files:

• test/js/web/abort/abort-signal-any.test.ts

📚 Learning: 2025-09-20T00:58:38.042Z

Learnt from: markovejnovic
Repo: oven-sh/bun PR: 22568
File: test/js/valkey/valkey.test.ts:561-564
Timestamp: 2025-09-20T00:58:38.042Z
Learning: For test/js/valkey/valkey.test.ts, do not comment on synchronous throw assertions for async Redis methods (like ctx.redis.set(), ctx.redis.unsubscribe(), etc.) - Bun's Redis client implementation differs from Node.js and can throw synchronously even for async methods. The maintainer has explicitly requested to stop looking at this error pattern.

Applied to files:

• test/js/web/abort/abort-signal-any.test.ts

📚 Learning: 2025-12-02T05:59:51.485Z

Learnt from: CR
Repo: oven-sh/bun PR: 0
File: CLAUDE.md:0-0
Timestamp: 2025-12-02T05:59:51.485Z
Learning: Applies to test/**/*.test.{ts,tsx} : In tests, call `expect(stdout).toBe(...)` before `expect(exitCode).toBe(0)` when spawning processes for more useful error messages on failure

Applied to files:

• test/js/web/abort/abort-signal-any.test.ts

📚 Learning: 2025-11-24T18:37:30.259Z

Learnt from: CR
Repo: oven-sh/bun PR: 0
File: test/CLAUDE.md:0-0
Timestamp: 2025-11-24T18:37:30.259Z
Learning: Applies to test/**/*.test.{ts,js,jsx,tsx,mjs,cjs} : Always use `await using` or `using` to ensure proper resource cleanup in tests for APIs like Bun.listen, Bun.connect, Bun.spawn, Bun.serve, etc

Applied to files:

• test/js/web/abort/abort-signal-any.test.ts

📚 Learning: 2025-11-24T18:37:30.259Z

Learnt from: CR
Repo: oven-sh/bun PR: 0
File: test/CLAUDE.md:0-0
Timestamp: 2025-11-24T18:37:30.259Z
Learning: Applies to test/**/*.test.{ts,js,jsx,tsx,mjs,cjs} : Do not set a timeout on tests. Bun already has timeouts

Applied to files:

• test/js/web/abort/abort-signal-any.test.ts

📚 Learning: 2025-11-06T00:58:23.965Z

Learnt from: markovejnovic
Repo: oven-sh/bun PR: 24417
File: test/js/bun/spawn/spawn.test.ts:903-918
Timestamp: 2025-11-06T00:58:23.965Z
Learning: In Bun test files, `await using` with spawn() is appropriate for long-running processes that need guaranteed cleanup on scope exit or when explicitly testing disposal behavior. For short-lived processes that exit naturally (e.g., console.log scripts), the pattern `const proc = spawn(...); await proc.exited;` is standard and more common, as evidenced by 24 instances vs 4 `await using` instances in test/js/bun/spawn/spawn.test.ts.

Applied to files:

• test/js/web/abort/abort-signal-any.test.ts

📚 Learning: 2025-11-08T04:06:33.198Z

Learnt from: Jarred-Sumner
Repo: oven-sh/bun PR: 24491
File: test/js/bun/transpiler/declare-global.test.ts:17-17
Timestamp: 2025-11-08T04:06:33.198Z
Learning: In Bun test files, `await using` with Bun.spawn() is the preferred pattern for spawned processes regardless of whether they are short-lived or long-running. Do not suggest replacing `await using proc = Bun.spawn(...)` with `const proc = Bun.spawn(...); await proc.exited;`.

Applied to files:

• test/js/web/abort/abort-signal-any.test.ts

📚 Learning: 2025-10-08T13:48:02.430Z

Learnt from: Jarred-Sumner
Repo: oven-sh/bun PR: 23373
File: test/js/bun/tarball/extract.test.ts:107-111
Timestamp: 2025-10-08T13:48:02.430Z
Learning: In Bun's test runner, use `expect(async () => { await ... }).toThrow()` to assert async rejections. Unlike Jest/Vitest, Bun does not require `await expect(...).rejects.toThrow()` - the async function wrapper with `.toThrow()` is the correct pattern for async error assertions in Bun tests.

Applied to files:

• test/js/web/abort/abort-signal-any.test.ts

📚 Learning: 2025-11-24T18:35:50.422Z

Learnt from: CR
Repo: oven-sh/bun PR: 0
File: .cursor/rules/writing-tests.mdc:0-0
Timestamp: 2025-11-24T18:35:50.422Z
Learning: Applies to test/**/*.{js,ts,jsx,tsx} : Write tests as JavaScript and TypeScript files using Jest-style APIs (`test`, `describe`, `expect`) and import from `bun:test`

Applied to files:

• test/js/web/abort/abort-signal-any.test.ts

📚 Learning: 2025-12-02T05:59:51.485Z

Learnt from: CR
Repo: oven-sh/bun PR: 0
File: CLAUDE.md:0-0
Timestamp: 2025-12-02T05:59:51.485Z
Learning: Applies to test/**/*.test.{ts,tsx} : Verify your test fails with `USE_SYSTEM_BUN=1 bun test <file>` and passes with `bun bd test <file>` - tests are not valid if they pass with `USE_SYSTEM_BUN=1`

Applied to files:

• test/js/web/abort/abort-signal-any.test.ts

📚 Learning: 2025-10-18T05:23:24.403Z

Learnt from: theshadow27
Repo: oven-sh/bun PR: 23798
File: test/js/bun/telemetry-server.test.ts:91-100
Timestamp: 2025-10-18T05:23:24.403Z
Learning: In the Bun codebase, telemetry tests (test/js/bun/telemetry-*.test.ts) should focus on telemetry API behavior: configure/disable/isEnabled, callback signatures and invocation, request ID correlation, and error handling. HTTP protocol behaviors like status code normalization (e.g., 200 with empty body → 204) should be tested in HTTP server tests (test/js/bun/http/), not in telemetry tests. Keep separation of concerns: telemetry tests verify the telemetry API contract; HTTP tests verify HTTP semantics.

Applied to files:

• test/js/web/abort/abort-signal-any.test.ts

📚 Learning: 2025-12-02T05:59:51.485Z

Learnt from: CR
Repo: oven-sh/bun PR: 0
File: CLAUDE.md:0-0
Timestamp: 2025-12-02T05:59:51.485Z
Learning: Applies to test/**/*.test.{ts,tsx} : For multi-file tests in Bun test suite, prefer using `tempDir` and `Bun.spawn`

Applied to files:

• test/js/web/abort/abort-signal-any.test.ts

🧬 Code graph analysis (1)

test/js/web/abort/abort-signal-any.test.ts (1)

src/js/node/test.ts (1)

• signal (63-68)

🔇 Additional comments (1)

test/js/web/abort/abort-signal-any.test.ts (1)

1-206: LGTM! All previous review comments have been addressed.

This test suite is well-structured and comprehensive. All the issues from previous reviews have been resolved:

• The AI tool reference in comments has been removed
• Time-based waits (Bun.sleep) have been replaced with event-based synchronization using Promise.withResolvers
• Unnecessary async keywords have been removed from synchronous tests
• The tests now properly await conditions rather than arbitrary time delays

The test suite follows all coding guidelines:

• ✓ Uses bun:test imports
• ✓ Employs test.each for data-driven tests (lines 89-101)
• ✓ No flaky time-based waits
• ✓ Proper use of Promise.withResolvers for event handling
• ✓ Clear describe block organization
• ✓ Helpful comments explaining synchronous abort behavior

The tests comprehensively cover AbortSignal.any() functionality including edge cases, reason propagation, event handling, nested compositions, and timeout interactions.

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Actionable comments posted: 4

📜 Review details

Configuration used: Path: .coderabbit.yaml

Review profile: ASSERTIVE

Plan: Pro

Disabled knowledge base sources:

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📥 Commits

Reviewing files that changed from the base of the PR and between 9c96937 and 849c43d.

📒 Files selected for processing (1)

• test/js/web/abort/abort-signal-any.test.ts (1 hunks)

🧰 Additional context used

📓 Path-based instructions (3)

test/**/*.{js,ts,jsx,tsx}

📄 CodeRabbit inference engine (.cursor/rules/writing-tests.mdc)

test/**/*.{js,ts,jsx,tsx}: Write tests as JavaScript and TypeScript files using Jest-style APIs (test, describe, expect) and import from bun:test
Use test.each and data-driven tests to reduce boilerplate when testing multiple similar cases

Files:

• test/js/web/abort/abort-signal-any.test.ts

test/**/*.test.{ts,js,jsx,tsx,mjs,cjs}

📄 CodeRabbit inference engine (test/CLAUDE.md)

test/**/*.test.{ts,js,jsx,tsx,mjs,cjs}: Use bun:test with files that end in *.test.{ts,js,jsx,tsx,mjs,cjs}
Do not write flaky tests. Never wait for time to pass in tests; always wait for the condition to be met instead of using an arbitrary amount of time
Never use hardcoded port numbers in tests. Always use port: 0 to get a random port
Prefer concurrent tests over sequential tests using test.concurrent or describe.concurrent when multiple tests spawn processes or write files, unless it's very difficult to make them concurrent
When spawning Bun processes in tests, use bunExe and bunEnv from harness to ensure the same build of Bun is used and debug logging is silenced
Use -e flag for single-file tests when spawning Bun processes
Use tempDir() from harness to create temporary directories with files for multi-file tests instead of creating files manually
Prefer async/await over callbacks in tests
When callbacks must be used and it's just a single callback, use Promise.withResolvers to create a promise that can be resolved or rejected from a callback
Do not set a timeout on tests. Bun already has timeouts
Use Buffer.alloc(count, fill).toString() instead of 'A'.repeat(count) to create repetitive strings in tests, as ''.repeat is very slow in debug JavaScriptCore builds
Use describe blocks for grouping related tests
Always use await using or using to ensure proper resource cleanup in tests for APIs like Bun.listen, Bun.connect, Bun.spawn, Bun.serve, etc
Always check exit codes and test error scenarios in error tests
Use describe.each() for parameterized tests
Use toMatchSnapshot() for snapshot testing
Use beforeAll(), afterEach(), beforeEach() for setup/teardown in tests
Track resources (servers, clients) in arrays for cleanup in afterEach()

Files:

• test/js/web/abort/abort-signal-any.test.ts

test/**/*.test.{ts,tsx}

📄 CodeRabbit inference engine (CLAUDE.md)

test/**/*.test.{ts,tsx}: For single-file tests in Bun test suite, prefer using -e flag over tempDir
For multi-file tests in Bun test suite, prefer using tempDir and Bun.spawn
Always use port: 0 when spawning servers in tests - do not hardcode ports or use custom random port functions
Use normalizeBunSnapshot to normalize snapshot output in tests instead of manual output comparison
Never write tests that check for no 'panic', 'uncaught exception', or similar strings in test output - that is not a valid test
Use tempDir from harness to create temporary directories in tests - do not use tmpdirSync or fs.mkdtempSync
In tests, call expect(stdout).toBe(...) before expect(exitCode).toBe(0) when spawning processes for more useful error messages on failure
Do not write flaky tests - do not use setTimeout in tests; instead await the condition to be met since you're testing the CONDITION, not TIME PASSING
Verify your test fails with USE_SYSTEM_BUN=1 bun test <file> and passes with bun bd test <file> - tests are not valid if they pass with USE_SYSTEM_BUN=1
Avoid shell commands in tests - do not use find or grep; use Bun's Glob and built-in tools instead
Test files must end in .test.ts or .test.tsx and be created in the appropriate test folder structure

Files:

• test/js/web/abort/abort-signal-any.test.ts

🧠 Learnings (16)

📓 Common learnings

Learnt from: CR
Repo: oven-sh/bun PR: 0
File: test/CLAUDE.md:0-0
Timestamp: 2025-11-24T18:37:30.259Z
Learning: Applies to test/**/*.test.{ts,js,jsx,tsx,mjs,cjs} : Always check exit codes and test error scenarios in error tests

📚 Learning: 2025-11-24T18:37:30.259Z

Learnt from: CR
Repo: oven-sh/bun PR: 0
File: test/CLAUDE.md:0-0
Timestamp: 2025-11-24T18:37:30.259Z
Learning: Applies to test/**/*.test.{ts,js,jsx,tsx,mjs,cjs} : Prefer async/await over callbacks in tests

Applied to files:

• test/js/web/abort/abort-signal-any.test.ts

📚 Learning: 2025-11-24T18:37:30.259Z

Learnt from: CR
Repo: oven-sh/bun PR: 0
File: test/CLAUDE.md:0-0
Timestamp: 2025-11-24T18:37:30.259Z
Learning: Applies to test/**/*.test.{ts,js,jsx,tsx,mjs,cjs} : Always check exit codes and test error scenarios in error tests

Applied to files:

• test/js/web/abort/abort-signal-any.test.ts

📚 Learning: 2025-11-24T18:35:50.422Z

Learnt from: CR
Repo: oven-sh/bun PR: 0
File: .cursor/rules/writing-tests.mdc:0-0
Timestamp: 2025-11-24T18:35:50.422Z
Learning: See `test/harness.ts` for common test utilities and helpers

Applied to files:

• test/js/web/abort/abort-signal-any.test.ts

📚 Learning: 2025-09-03T01:30:58.001Z

Learnt from: markovejnovic
Repo: oven-sh/bun PR: 21728
File: test/js/valkey/valkey.test.ts:264-271
Timestamp: 2025-09-03T01:30:58.001Z
Learning: For test/js/valkey/valkey.test.ts PUB/SUB tests, avoid arbitrary sleeps and async-forEach. Instead, resolve a Promise from the subscriber callback when the expected number of messages is observed and await it with a bounded timeout (e.g., withTimeout + Promise.withResolvers) to account for Redis server→subscriber propagation.

Applied to files:

• test/js/web/abort/abort-signal-any.test.ts

📚 Learning: 2025-11-24T18:37:30.259Z

Learnt from: CR
Repo: oven-sh/bun PR: 0
File: test/CLAUDE.md:0-0
Timestamp: 2025-11-24T18:37:30.259Z
Learning: Applies to test/**/*.test.{ts,js,jsx,tsx,mjs,cjs} : Do not write flaky tests. Never wait for time to pass in tests; always wait for the condition to be met instead of using an arbitrary amount of time

Applied to files:

• test/js/web/abort/abort-signal-any.test.ts

📚 Learning: 2025-12-02T05:59:51.485Z

Learnt from: CR
Repo: oven-sh/bun PR: 0
File: CLAUDE.md:0-0
Timestamp: 2025-12-02T05:59:51.485Z
Learning: Applies to test/**/*.test.{ts,tsx} : Never write tests that check for no 'panic', 'uncaught exception', or similar strings in test output - that is not a valid test

Applied to files:

• test/js/web/abort/abort-signal-any.test.ts

📚 Learning: 2025-12-02T05:59:51.485Z

Learnt from: CR
Repo: oven-sh/bun PR: 0
File: CLAUDE.md:0-0
Timestamp: 2025-12-02T05:59:51.485Z
Learning: Applies to test/**/*.test.{ts,tsx} : Do not write flaky tests - do not use `setTimeout` in tests; instead `await` the condition to be met since you're testing the CONDITION, not TIME PASSING

Applied to files:

• test/js/web/abort/abort-signal-any.test.ts

📚 Learning: 2025-11-24T18:35:08.612Z

Learnt from: CR
Repo: oven-sh/bun PR: 0
File: .cursor/rules/dev-server-tests.mdc:0-0
Timestamp: 2025-11-24T18:35:08.612Z
Learning: Applies to test/bake/dev/esm.test.ts : Organize ESM tests in esm.test.ts for tests about various ESM features in development mode

Applied to files:

• test/js/web/abort/abort-signal-any.test.ts

📚 Learning: 2025-11-24T18:37:30.259Z

Learnt from: CR
Repo: oven-sh/bun PR: 0
File: test/CLAUDE.md:0-0
Timestamp: 2025-11-24T18:37:30.259Z
Learning: Applies to test/**/*.test.{ts,js,jsx,tsx,mjs,cjs} : Always use `await using` or `using` to ensure proper resource cleanup in tests for APIs like Bun.listen, Bun.connect, Bun.spawn, Bun.serve, etc

Applied to files:

• test/js/web/abort/abort-signal-any.test.ts

📚 Learning: 2025-10-08T13:48:02.430Z

Learnt from: Jarred-Sumner
Repo: oven-sh/bun PR: 23373
File: test/js/bun/tarball/extract.test.ts:107-111
Timestamp: 2025-10-08T13:48:02.430Z
Learning: In Bun's test runner, use `expect(async () => { await ... }).toThrow()` to assert async rejections. Unlike Jest/Vitest, Bun does not require `await expect(...).rejects.toThrow()` - the async function wrapper with `.toThrow()` is the correct pattern for async error assertions in Bun tests.

Applied to files:

• test/js/web/abort/abort-signal-any.test.ts

📚 Learning: 2025-11-24T18:35:50.422Z

Learnt from: CR
Repo: oven-sh/bun PR: 0
File: .cursor/rules/writing-tests.mdc:0-0
Timestamp: 2025-11-24T18:35:50.422Z
Learning: Applies to test/**/*.{js,ts,jsx,tsx} : Write tests as JavaScript and TypeScript files using Jest-style APIs (`test`, `describe`, `expect`) and import from `bun:test`

Applied to files:

• test/js/web/abort/abort-signal-any.test.ts

📚 Learning: 2025-12-02T05:59:51.485Z

Learnt from: CR
Repo: oven-sh/bun PR: 0
File: CLAUDE.md:0-0
Timestamp: 2025-12-02T05:59:51.485Z
Learning: Applies to test/**/*.test.{ts,tsx} : Verify your test fails with `USE_SYSTEM_BUN=1 bun test <file>` and passes with `bun bd test <file>` - tests are not valid if they pass with `USE_SYSTEM_BUN=1`

Applied to files:

• test/js/web/abort/abort-signal-any.test.ts

📚 Learning: 2025-12-02T05:59:51.485Z

Learnt from: CR
Repo: oven-sh/bun PR: 0
File: CLAUDE.md:0-0
Timestamp: 2025-12-02T05:59:51.485Z
Learning: Applies to test/**/*.test.{ts,tsx} : For multi-file tests in Bun test suite, prefer using `tempDir` and `Bun.spawn`

Applied to files:

• test/js/web/abort/abort-signal-any.test.ts

📚 Learning: 2025-10-18T05:23:24.403Z

Learnt from: theshadow27
Repo: oven-sh/bun PR: 23798
File: test/js/bun/telemetry-server.test.ts:91-100
Timestamp: 2025-10-18T05:23:24.403Z
Learning: In the Bun codebase, telemetry tests (test/js/bun/telemetry-*.test.ts) should focus on telemetry API behavior: configure/disable/isEnabled, callback signatures and invocation, request ID correlation, and error handling. HTTP protocol behaviors like status code normalization (e.g., 200 with empty body → 204) should be tested in HTTP server tests (test/js/bun/http/), not in telemetry tests. Keep separation of concerns: telemetry tests verify the telemetry API contract; HTTP tests verify HTTP semantics.

Applied to files:

• test/js/web/abort/abort-signal-any.test.ts

📚 Learning: 2025-11-24T18:37:30.259Z

Learnt from: CR
Repo: oven-sh/bun PR: 0
File: test/CLAUDE.md:0-0
Timestamp: 2025-11-24T18:37:30.259Z
Learning: Applies to test/**/*.test.{ts,js,jsx,tsx,mjs,cjs} : Do not set a timeout on tests. Bun already has timeouts

Applied to files:

• test/js/web/abort/abort-signal-any.test.ts

🧬 Code graph analysis (1)

test/js/web/abort/abort-signal-any.test.ts (1)

src/js/node/test.ts (1)

• signal (63-68)

🔇 Additional comments (1)

test/js/web/abort/abort-signal-any.test.ts (1)

10-113: Solid coverage of core AbortSignal.any semantics

The basic, already‑aborted, and reason‑propagation tests are clear, deterministic, and align well with the expected AbortSignal.any behavior. The use of test.each for reason cases keeps the suite concise and readable.