Review Commit

Review Commit

This skill analyzes a git commit and generates a comprehensive test plan document for all changed files.

When to Use

Invoke this skill when:

• User asks to "review a commit" or "analyze a commit"
• User wants to create a test plan for recent changes
• User mentions "changed files" in context of testing
• User wants to ensure test coverage for new code

Workflow

Step 1: Collect Changed Files

Use git commands to identify all changed files in the target commit:

# Get commit info
git log -1 --pretty=format:"%H%n%an%n%ad%n%s%n%b"

# Get all changed files with status (A=Added, M=Modified, D=Deleted)
git diff HEAD~1 --name-status

# Get list of changed files only
git diff HEAD~1 --name-only

Step 2: Categorize Changes

Organize the changed files into categories:

1. New Classes (Added - A): Files that were added in the commit
2. Modified Classes (Modified - M): Files that were modified
3. Deleted Classes (Deleted - D): Files that were removed

Filter to focus on source code files:

• src/main/kotlin/**/*.kt - Main source files
• src/main/java/**/*.java - Java source files
• Exclude test files from the "needs test" list
• Exclude config files, resources, and build files

Step 3: Read and Analyze Each File

For each changed source file:

1. Read the file content using mcp_Filesystem_read_text_file or Read tool
2. Analyze the class structure:
   • Class name and purpose
   • Key methods and their responsibilities
   • Dependencies and integrations
   • Complexity level
3. Determine testing priority:
   • HIGH: Core business logic, complex algorithms, public APIs
   • MEDIUM: Service classes, utilities, data transformations
   • LOW: Constants, simple data classes, UI renderers

Step 4: Generate Test Plan Document

Create a markdown document at docs/test-plan-<feature-name>.md with:

Document Structure

# Test Case Plan for Commit: <commit-message>

**Commit:** `<commit-hash>`  
**Author:** <author>  
**Date:** <date>  
**Message:** <commit-message>

---

## Summary

<Brief description of what the commit changes>

---

## 1. New Classes Requiring Tests (Added - A)

### 1.1 <Category Name>

| Class | Path | Priority | Test Status | Description |
|-------|------|----------|-------------|-------------|
| `ClassName` | `path/to/File.kt` | **HIGH** | ❌ No test | <Detailed description> |

**Test Scenarios:**

1. **ClassName**
   - Test scenario 1
   - Test scenario 2
   - ...

---

## 2. Modified Classes Requiring Test Updates (Modified - M)

### 2.1 <Category Name>

| Class | Path | Priority | Test Status | Description |
|-------|------|----------|-------------|-------------|
| `ClassName` | `path/to/File.kt` | **MEDIUM** | ✅ Has test | <What changed and what to verify> |

**Test Scenarios:**

1. **ClassName**
   - Verify new behavior
   - Test edge cases
   - ...

---

## 3. Deleted Classes

| Class | Path | Notes |
|-------|------|-------|
| `ClassName` | `path/to/File.kt` | <Why deleted, migration notes> |

---

## 4. Test Implementation Priority

### Phase 1: Critical Tests (HIGH Priority)

| # | Test Class | Target Class | Key Scenarios |
|---|------------|--------------|---------------|
| 1 | `ClassTest` | `Class` | Key scenarios |

### Phase 2: Important Tests (HIGH Priority)

...

### Phase 3: Medium Priority Tests

...

### Phase 4: Low Priority Tests

...

---

## 5. Test File Locations

src/test/kotlin/com/example/ ├── package/ │ ├── ClassTest.kt │ └── ...

---

## 6. Existing Tests to Verify

| Test File | Status | Notes |
|-----------|--------|-------|
| `ExistingTest.kt` | ✅ Modified | <What to verify> |

---

## 7. Test Coverage Summary

| Category | Total | Has Test | Needs Test |
|----------|-------|----------|------------|
| New Classes | X | Y | Z |
| Modified Classes | X | Y | Z |
| **Total** | **X** | **Y** | **Z** |

---

## 8. Test Patterns and Utilities

### Test Base Classes
- List applicable test base classes

### Test Data
- Test data file locations

### Mock Utilities
- Available mock utilities

---

## 9. Next Steps

1. ⬜ Review each class without test coverage
2. ⬜ Prioritize based on complexity and usage
3. ⬜ Create test cases following the project's test patterns
4. ⬜ Ensure integration tests cover the full workflow
5. ⬜ Update this document as tests are implemented

Step 5: Add Detailed Comments

For each class in the test plan, include:

1. Description: What the class does, its responsibilities, and how it integrates
2. Test Scenarios: Specific test cases to write
3. Priority: HIGH/MEDIUM/LOW based on:
   • Business criticality
   • Code complexity
   • Usage frequency
   • Risk of regression

Step 6: Identify Test Patterns

Look at existing tests in the project to identify:

1. Test base classes being used
2. Naming conventions for test files
3. Test utilities and fixtures available
4. Mock patterns used
5. Assertion libraries used

Example Usage

User: review the latest commit

The skill will:

1. Run git log -1 to get commit info
2. Run git diff HEAD~1 --name-status to get changed files
3. Read each source file
4. Generate docs/test-plan-<feature>.md
5. Include detailed comments and test scenarios for each class

Output

The skill produces a comprehensive test plan document that:

• Lists all added/modified/deleted classes
• Provides detailed descriptions for each class
• Suggests specific test scenarios
• Prioritizes test implementation
• Shows test coverage summary
• Guides test file organization

Notes

• Focus on source files, not test files (test files are the output, not input)
• Exclude build files, resources, and configuration from detailed analysis
• Check if tests already exist for modified files
• Consider integration tests for complex workflows
• Group related classes by package or feature