Implementation Plan: Cocoon Integration Test [checkpoint: 5d0d05c]

Phase 1: Package Setup & Fake Consolidation

• [x] Task: Create packages/cocoon_integration_test structure.
  • [x] Create directory and pubspec.yaml.
  • [x] Add dependencies: cocoon_service (app_dart), cocoon_server_test, test, http, etc.
• [x] Task: Consolidate Fakes into packages/cocoon_integration_test.
  • [x] Identify FakeConfig, FakeDashboardAuthentication, FakeBuildBucketClient, FakeLuciBuildService, FakeGerritService, FakeScheduler, FakeCiYamlFetcher, FakeBuildStatusService, FakeContentAwareHashService.
  • [x] Move these from app_dart/test/src/ (or wherever they are) to packages/cocoon_integration_test/lib/src/fakes/.
  • [x] Export them from packages/cocoon_integration_test/lib/testing.dart.
  • [x] Update app_dart to depend on cocoon_integration_test for these fakes (refactor existing tests).

Phase 2: Implementation of Integration Server

• [x] Task: Implement IntegrationServer class.
  • [x] Create packages/cocoon_integration_test/lib/src/server.dart.
  • [x] Implement startServer({Config? config, ...}) which sets up the CocoonService (from app_dart) with the Fakes.
  • [x] Ensure CacheService is inMemory: true.
• [x] Task: Implement Test Helpers.
  • [x] Create helper methods to seed the Fakes (e.g., populateFirestore, setConfigs).

Phase 3: Verification

• [x] Task: Write a “Smoke Test”.
  • [x] Create packages/cocoon_integration_test/test/server_test.dart.
  • [x] Verify the server starts and responds to a simple health check or API call.
• [x] Task: Conductor - User Manual Verification (Protocol in workflow.md)