---
description: Smart test runner - runs tests for changed files only
argument-hint: [pattern] - Optional test pattern or file to run
---

# Smart Test Runner

## Pre-computed Context

**Test Framework Detection:**
!`cat package.json 2>/dev/null | grep -E '"(jest|vitest|mocha|ava|tape)"' | head -3 || echo "No JS test framework"`

**Python Test Framework:**
!`cat pyproject.toml setup.cfg 2>/dev/null | grep -E '(pytest|unittest|nose)' | head -3 || echo "No Python test framework"`

**Test Scripts:**
!`cat package.json 2>/dev/null | grep -E '"test' | head -5 || echo "No test scripts"`

**Changed Files:**
!`git diff --name-only HEAD~3 2>/dev/null | head -10`

**Related Test Files:**
!`git diff --name-only HEAD~3 2>/dev/null | sed 's/\.\(ts\|tsx\|js\|jsx\)$/.test.\1/' | xargs -I{} sh -c 'test -f {} && echo {}' 2>/dev/null | head -5`

---

## Instructions

You are running tests intelligently - focusing on changed files when possible.

### Detect Test Framework

#### JavaScript/TypeScript

1. **Jest**
```bash
npx jest --passWithNoTests
```

2. **Vitest**
```bash
npx vitest run
```

3. **npm test script**
```bash
npm test
```

#### Python

1. **pytest**
```bash
pytest -v
```

2. **unittest**
```bash
python -m unittest discover
```

### Smart Test Selection

If no argument provided, run tests related to changed files:

#### Jest - Run related tests
```bash
npx jest --findRelatedTests $(git diff --name-only HEAD~3 | tr '\n' ' ')
```

#### Jest - Run changed test files only
```bash
npx jest --testPathPattern="$(git diff --name-only HEAD~3 | grep -E '\.test\.(ts|tsx|js|jsx)$' | tr '\n' '|' | sed 's/|$//')"
```

#### Vitest - Run changed
```bash
npx vitest run --changed HEAD~3
```

#### pytest - Run specific files
```bash
pytest $(git diff --name-only HEAD~3 | grep -E '_test\.py$|test_.*\.py$' | tr '\n' ' ')
```

### With Pattern Argument

If argument provided, run tests matching that pattern:

```bash
# Jest
npx jest --testPathPattern="$ARGUMENTS"

# Vitest
npx vitest run "$ARGUMENTS"

# pytest
pytest -k "$ARGUMENTS"
```

### Test Output

Show test results with appropriate verbosity:

```bash
# Jest with coverage
npx jest --coverage --passWithNoTests

# pytest verbose
pytest -v --tb=short
```

### On Failure

If tests fail:
1. Show the failing test names
2. Show the error messages
3. Identify the source file that likely caused the failure
4. Suggest fix or ask if you should investigate

---

## Common Options

**Run all tests:**
```bash
/workflow:test --all
```

**Run with coverage:**
```bash
/workflow:test --coverage
```

**Run in watch mode:**
```bash
npx jest --watch
# or
npx vitest
```

**Run specific test file:**
```bash
/workflow:test src/utils.test.ts
```