spec-test — Create and Run Tests for a Spec Task

Create tests based on task completion criteria, run them, and output structured results.

Language Rules

1. Auto-detect input language → output in the same language
2. Japanese input → Japanese output, use references/test-guide.ja.md
3. English input → English output, use references/test-guide.md
4. Explicit override takes priority

Options

Execution Flow

Step 0: Context Loading (Phase A / Phase B)

Same as spec-code §Step 0, but identify your role as tester.

Phase B applies when re-testing after a fix: focus on the specific test failures and changed code.

Step 1: Extract Test Requirements

From tasks.md, find the task matching --task {task-id} and extract:

• Completion criteria (checkboxes)
• Target files (implementation files to test)
• Requirements ID (for traceability)

From design.md (if available):

• Expected interfaces and behaviors
• Edge cases mentioned in design

Step 2: Detect Test Patterns

Scan the project for existing test conventions:

1. Find test files: look for *.test.*, *.spec.*, __tests__/, test/, tests/ directories
2. Detect framework: Jest, Vitest, Mocha, pytest, Go test, Rust test, etc.
3. Detect patterns: AAA (Arrange-Act-Assert), describe/it blocks, test helpers, fixtures
4. Detect test commands: from package.json scripts, Makefile, CLAUDE.md, etc.

If no existing tests found, use framework defaults appropriate to the language.

Step 3: Design Test Cases

Based on completion criteria and design:

1. Happy path tests: Each completion criterion → at least one test
2. Edge cases: Empty inputs, boundary values, error conditions
3. Negative tests: Invalid inputs, unauthorized access, missing data

Step 4: Create Tests

Write test files following detected patterns:

• Place in the conventional test location
• Import test helpers/fixtures if they exist
• Follow naming conventions of existing tests
• Apply AAA pattern (Arrange-Act-Assert)

Step 5: Run Tests

Execute the detected test command:

# Auto-detect and run
npm test / npx jest / npx vitest / pytest / go test / cargo test

If a specific test file can be targeted, run only the new tests first, then the full suite.

Step 6: Collect Results and Write Output

Output to --output path (default: .specs/{feature}/test-{task-id}.md):

# Test: {task-id}
type: test

## Meta
- Tester: spec-test
- Date: {ISO 8601}
- Command: {test command used}
- Framework: {detected framework}

## Results
- Tests: {passed}/{total} passed
- Coverage: {percentage}% (if available)
- Duration: {time}

## Test Cases
- [x] {test name} — {what it verifies}
- [x] {test name} — {what it verifies}
- [ ] {test name} — FAILED: {error message}

## Completion Criteria Coverage
| Criterion | Test | Status |
|---|---|---|
| {criterion from tasks.md} | {test name} | PASS / FAIL |

## Gate: PASS / FAIL

Gate logic:

• All tests pass → PASS
• Any test fails → FAIL

Step 7: Commit Tests

Commit test files following project conventions:

• Default format: test(scope): {task-id} — {brief description}
• Stage only test files

Error Handling

Usage Examples

# Test a specific task
/spec-test --task T-007 --spec .specs/did-deactivation/

# Test with explicit file targets
/spec-test --task T-003 --spec .specs/auth-feature/ --files src/auth/service.ts

# Standalone (no spec context)
/spec-test --task T-001 --files src/utils/parser.ts