By name: integration-e2e-testing description: "Designs integration and E2E tests with mock boundaries. Use when: writing E2E tests, integration tests, or reviewing test quality."
Integration Test & E2E Test Design/Implementation Rules
Test Types and Limits
| Type | Purpose | Limit |
|---|---|---|
| Integration Test | Component interaction verification | 3 per feature |
| E2E Test | Critical user journey verification | 1-2 per feature |
Behavior-First Principle
Observability Check (All YES = Include)
| Check | Question | If NO |
|---|---|---|
| Observable | Can user observe the result? | Exclude |
| System Context | Does it require integration of multiple components? | Exclude |
| Automatable | Can it run stably in CI environment? | Exclude |
Include/Exclude Criteria
Include: Business logic accuracy, data integrity, user-visible features, error handling Exclude: External live connections, performance metrics, implementation details, UI layout
Skeleton Specification
Required Comment Format
Each test skeleton MUST include:
- AC: Original acceptance criteria text
- ROI: Calculated score with Business Value and Frequency
- Behavior: Trigger → Process → Observable Result format
- Metadata: @category, @dependency, @complexity annotations
Implementation Rules
Behavior Verification
| Step Type | Verification Target |
|---|---|
| Trigger | Reproduce in test setup (Arrange) |
| Process | Intermediate state or function call |
| Observable Result | Final output value (return value, error message, log output) |
Pass Criteria: Test passes if "observable result" is verified as return value or mock call argument
Integration Test Mock Boundaries
| Judgment Criteria | Mock | Actual |
|---|---|---|
| Part of test target? | No → Can mock | Yes → Actual required |
| External network communication? | Yes → Mock required | No → Actual recommended |
E2E Test Execution Conditions
- Execute only after all components are implemented
- Do not use mocks (full system integration required)
Review Criteria
Skeleton and Implementation Consistency
| Check | Failure Condition |
|---|---|
| Behavior Verification | No assertion for "observable result" |
| Verification Item Coverage | Listed verification items not included in assertions |
| Mock Boundary | Internal components mocked in integration test |
Implementation Quality
| Check | Failure Condition |
|---|---|
| AAA Structure | Arrange/Act/Assert separation unclear |
| Independence | State sharing between tests, execution order dependency |
| Reproducibility | Depends on date/random, results vary |
| Readability | Test name and verification content don't match |