Test Coverage Analysis

Analyze test coverage and identify untested code.

Usage

/craft:test:coverage [options]

What This Does

1. Runs tests with coverage instrumentation
2. Analyzes coverage data by file, function, line
3. Identifies gaps in test coverage
4. Suggests tests for uncovered code

Coverage Metrics

Metric	Description
Line	Percentage of lines executed
Branch	Percentage of branches taken
Function	Percentage of functions called
Statement	Percentage of statements executed

Options

• --report <type> - Report type: terminal, html, json
• --threshold <N> - Minimum coverage percentage
• --show-missing - Show uncovered line numbers
• --by-file - Breakdown by file
• --suggest - Suggest tests for gaps

Examples

# Basic coverage report
/craft:test:coverage

# HTML report
/craft:test:coverage --report html

# Show missing lines
/craft:test:coverage --show-missing

# Enforce threshold
/craft:test:coverage --threshold 80

# Get test suggestions
/craft:test:coverage --suggest

Output

Running tests with coverage...

Coverage Report
─────────────────────────────────────────
File                     Lines   Branch
─────────────────────────────────────────
src/auth.py               95%     88%
src/api/handlers.py       72%     65%
src/utils.py             100%    100%
src/db/models.py          85%     80%
─────────────────────────────────────────
TOTAL                     87%     82%

Uncovered lines:
  src/api/handlers.py: 45-48, 72-80, 95

Suggested tests:
  - test_handler_error_cases (lines 45-48)
  - test_handler_edge_cases (lines 72-80)

Integration

Works with:

• /craft:test:run - Run tests
• /craft:code:coverage - Code coverage command
• /craft:code:ci-local - CI checks