Organize SDK tests and enforce 98% source coverage

[HAYDEN-OAI]

Summary

• Separate Stainless-generated API contract tests from handwritten unit tests with dedicated test:unit, test:generated, and test:coverage commands.
• Add focused coverage for streaming, response accumulation, WebSocket adapters and reconnects, authentication, pagination, uploads, platform detection, resource exports, and generated helper methods.
• Measure every executable SDK source file with V8 coverage, excluding only vendored and type-only files, and enforce 98% statements/lines, 90% branches, and 93% functions in the required CI test-matrix check.

Validation

• Full coverage suite: 1,980 tests passed; 1 existing test skipped.
• Coverage: 98.83% statements/lines, 90.72% branches, and 93.50% functions.
• ./node_modules/.bin/tsc --noEmit --pretty false
• ./node_modules/.bin/eslint .
• ./node_modules/.bin/prettier --check .
• node --experimental-strip-types scripts/check-node-version-policy.ts

Related Linear issues

• SDK-205 — Define a meaningful test-coverage target and automate reporting

[openai-sdks]

OkTest Summary

✅ 237/237 SDK tests passed in 8.912s for Node SDK PR #2034.

Test results — 42 files

Test	Result	Time
tests/chat-completions-complex-body.test.ts	✅ Passed	108ms
tests/chat-completions-create.test.ts	✅ Passed	114ms
tests/chat-completions-stream.test.ts	✅ Passed	193ms
tests/files-content-binary.test.ts	✅ Passed	112ms
tests/files-create-multipart.test.ts	✅ Passed	137ms
tests/files-list-pagination.test.ts	✅ Passed	114ms
tests/initialize-config.test.ts	✅ Passed	87ms
tests/instance-isolation.test.ts	✅ Passed	104ms
tests/models-list.test.ts	✅ Passed	113ms
tests/responses-background-lifecycle.test.ts	✅ Passed	172ms
tests/responses-body-method-errors.test.ts	✅ Passed	320ms
tests/responses-cancel-timeout.test.ts	✅ Passed	204ms
tests/responses-cancel.test.ts	✅ Passed	171ms
tests/responses-compact-retries.test.ts	✅ Passed	118ms
tests/responses-compact.test.ts	✅ Passed	173ms
tests/responses-create-advanced-stream.test.ts	✅ Passed	97ms
tests/responses-create-advanced.test.ts	✅ Passed	135ms
tests/responses-create-disconnect.test.ts	✅ Passed	1.088s
tests/responses-create-errors.test.ts	✅ Passed	166ms
tests/responses-create-malformed-api-responses.test.ts	✅ Passed	149ms
tests/responses-create-retries.test.ts	✅ Passed	204ms
tests/responses-create-stream-failures.test.ts	✅ Passed	139ms
tests/responses-create-stream-timeout.test.ts	✅ Passed	2.141s
tests/responses-create-stream-wire.test.ts	✅ Passed	2.142s
tests/responses-create-stream.test.ts	✅ Passed	61ms
tests/responses-create-terminal-states.test.ts	✅ Passed	174ms
tests/responses-create-timeout.test.ts	✅ Passed	198ms
tests/responses-create.test.ts	✅ Passed	110ms
tests/responses-delete.test.ts	✅ Passed	99ms
tests/responses-input-items-errors.test.ts	✅ Passed	170ms
tests/responses-input-items-list.test.ts	✅ Passed	149ms
tests/responses-input-items-options.test.ts	✅ Passed	78ms
tests/responses-input-tokens-count-timeout.test.ts	✅ Passed	217ms
tests/responses-input-tokens-count.test.ts	✅ Passed	139ms
tests/responses-malformed-inputs.test.ts	✅ Passed	1.711s
tests/responses-not-found-errors.test.ts	✅ Passed	252ms
tests/responses-parse.test.ts	✅ Passed	167ms
tests/responses-retrieve-retries.test.ts	✅ Passed	574ms
tests/responses-retrieve.test.ts	✅ Passed	154ms
tests/responses-stored-method-errors.test.ts	✅ Passed	408ms
tests/retry-behavior.test.ts	✅ Passed	2.911s
tests/sdk-error-shape.test.ts	✅ Passed	227ms

View OkTest run #30571188819

_{SDK merge (d44d12b89f5b) · head (69bc9a164fe2) · base (d77cf24d9f38) · OkTest (91635c6a2723)}

[jbeckwith-oai]

Thermo-nuclear review clean. Verified the exact head (69bc9a1), suite partitioning, coverage gate wiring, source/test structure, and green CI coverage (98.83% statements/lines, 90.72% branches, 93.5% functions; 1,980 tests).