Skill: Improve Test Coverage

Trigger

When coverage is below {{CONFIG.testing.coverageMinimum}}% or user asks to improve coverage.

Steps

Step 1: Analyze Current Coverage

• Run coverage report: {{CONFIG.testing.coverageCommand}}
• Identify files below {{CONFIG.testing.coverageMinimum}}% coverage
• Rank by: business criticality × uncovered percentage

Step 2: Identify Gaps

For each uncovered file:

• List uncovered functions/methods
• List uncovered branches (if/else, switch)
• List uncovered error paths
• Determine which gaps are most important

Step 3: Write Missing Tests

Priority order:

1. Error handling paths
2. Business logic branches
3. Edge cases (null, empty, boundary)
4. Success paths (usually already covered)

For each test:

• Follow AAA pattern (Arrange-Act-Assert)
• Use descriptive test names
• Mock external dependencies
• Assert specific behaviors, not implementation

Step 4: Verify Coverage

• Run coverage again: {{CONFIG.testing.coverageCommand}}
• Confirm target met: ≥{{CONFIG.testing.coverageMinimum}}%
• All new tests pass

Completion

Coverage meets or exceeds {{CONFIG.testing.coverageMinimum}}% with meaningful tests.