Test Coverage Analyzer

Name: test-coverage-analyzer
Rating: 78
Author: codeswiftr

When to Use

•After implementing new features to ensure coverage.
•Before releases to validate quality.
•When refactoring to ensure regression protection.
•During code reviews to assess test quality.

Coverage Metrics

Metric	Target	Critical
Line Coverage	80%+	60%+
Branch Coverage	75%+	50%+
Function Coverage	90%+	70%+

Workflow

1. Generate Coverage Report

bash

# Python (pytest)
pytest --cov=src --cov-report=html --cov-report=term-missing

# JavaScript (Jest)
npm test -- --coverage

# Go
go test -coverprofile=coverage.out ./...
go tool cover -html=coverage.out

# Rust
cargo tarpaulin --out Html

2. Analyze Gaps

Focus on:

•Critical paths: Auth, payments, data handling.
•Error handling: Exception branches, edge cases.
•Business logic: Core domain functions.
•Integration points: API calls, database operations.

3. Prioritize Tests

Priority	What to Test
P0	Security-critical code (auth, encryption)
P1	Business-critical logic (payments, core features)
P2	Error handling and edge cases
P3	Utility functions and helpers
P4	UI components (if not critical)

4. Generate Test Suggestions

For each uncovered function:

•Identify input types and ranges.
•List edge cases (null, empty, boundary).
•Note error conditions to test.
•Suggest mocking requirements.

Test Suggestion Template

markdown

## Missing Coverage: `function_name` (file.py:42)

### Current Coverage: 45% (lines 42-60 uncovered)

### Suggested Tests:

#### Happy Path
```python
def test_function_name_success():
    result = function_name(valid_input)
    assert result == expected_output

Edge Cases

python

def test_function_name_empty_input():
    with pytest.raises(ValueError):
        function_name("")

def test_function_name_boundary():
    result = function_name(MAX_VALUE)
    assert result == expected_boundary

Error Handling

python

def test_function_name_handles_timeout():
    with mock.patch('module.external_call', side_effect=TimeoutError):
        result = function_name(input)
        assert result == fallback_value

code


## Output Checklist
- [ ] Coverage report generated.
- [ ] Critical path coverage verified.
- [ ] Gap analysis completed.
- [ ] Test suggestions for uncovered code.
- [ ] Priority ranking for new tests.