cypress-io/cypress

Tests and CI were inspected, not executed; their existence is not a passing result. The repository combines Vitest, Mocha, Jest, Cypress browser suites, and a system-test harness. Inspected coverage includes option translation, session persistence/probing, subscription behavior, configuration child failures, and browser interception. The inventory and test inspection are bounded, so local TODOs and mocks describe specific limits rather than whole-repository coverage gaps.

• Root Vitest discovers package/tooling/script project configurations and the CLI project, excludes system-tests, and configures V8 coverage plus default/JUnit reporting; server test-unit runs Mocha then Vitest, while data-context uses Jest with experimental VM modules.
  vitest.config.ts#L3-15packages/server/package.json#L18-23packages/data-context/package.json#L17-19
• CLI run tests assert project-path rejection, conflicting headed/headless flags, testing-type choices, and POSIX argument forwarding; verify/spawn are mocked, so these tests do not establish real binary launch behavior.
  cli/test/lib/exec/run.spec.ts#L32-41cli/test/lib/exec/run.spec.ts#L61-99cli/test/lib/exec/run.spec.ts#L112-164
• Server session tests use temporary cache directories and inspect actual JSON files, covering immutable identity, temporary-file cleanup, swallowed write failure, pending-write removal, and project-switch preservation.
  packages/server/test/unit/cypress-sessions_spec.ts#L13-32packages/server/test/unit/cypress-sessions_spec.ts#L62-109packages/server/test/unit/cypress-sessions_spec.ts#L221-249
• CLI session tests exercise fake HTTP sessions and closed ports, asserting rejection of recycled-port/session mismatches, malformed JSON, timeout, and stale CDP endpoints while retaining browser identity.
  cli/test/lib/cypress-sessions.spec.ts#L193-227cli/test/lib/cypress-sessions.spec.ts#L230-262
• InterceptedRequest Vitest tests resolve pending handlers through a mocked socket and assert enabled/disabled subscription dispatch counts; they do not exercise a real proxy or CDP transport.
  packages/net-stubbing/test/unit/intercepted-request.spec.ts#L8-64packages/net-stubbing/test/unit/intercepted-request.spec.ts#L67-118
• The driver interception suite asserts route state and backend event frames in browser tests, but declares 15 retries and unique route names for documented flakiness/request leakage. runEachSpec also carries an explicit TODO for a cancelled just-in-time component-run system test.
  packages/driver/cypress/e2e/commands/net_stubbing.cy.ts#L14-29packages/driver/cypress/e2e/commands/net_stubbing.cy.ts#L45-84packages/server/lib/modes/run.ts#L889-904
• A Jest ProjectConfigIpc test loads a real configuration child and injects EPIPE; system config tests cover invalid settings and JS/TS config filenames, and the harness offers withBinary mode. A config-spec TODO requests environment-variable coverage locally.
  packages/data-context/test/unit/data/ProjectConfigIpc-real-child-process.spec.ts#L33-84system-tests/test/config_spec.js#L21-79system-tests/lib/system-tests.ts#L81-101
• Inspected CircleCI definitions gate contributor builds behind approval, select suites through pipeline parameters, add Chrome forceHttp1 smoke coverage, and aggregate browser/system/type/lint checks at ready-to-release; GitHub Actions separately checks semantic PR titles/changelog and generates release SBOMs.
  .circleci/src/pipeline/workflows/pull-request.yml#L39-105.circleci/src/pipeline/workflows/pull-request.yml#L327-345.circleci/src/pipeline/workflows/@main.yml#L279-331.github/workflows/semantic-pull-request.yml#L35-49