Plugin Test Framework Skill

Plugin Test Framework

Create isolated virtual test environments to verify hooks, plugins, and agents work correctly.

Quick Start

# Create test environment
/forge-editor:test-env hook     # Hook test environment
/forge-editor:test-env plugin   # Full plugin test
/forge-editor:test-env agent    # Agent test

# Run tests
/forge-editor:run-tests /tmp/test-env

Test Environment Structure

/tmp/plugin-test-{uuid}/
├── .claude/
│   ├── settings.json          # Hook configurations
│   └── hooks/
│       ├── *.sh               # Hook scripts
│       └── logs/              # Execution logs
├── .claude-plugin/
│   └── plugin.json            # Plugin metadata
├── commands/
│   └── *.md                   # Slash commands
├── skills/
│   └── */SKILL.md             # Skills
├── agents/
│   └── *.md                   # Agent definitions
├── run-tests.sh               # Test runner
└── TEST-RESULTS.md            # Results

Test Types

1. Hook Tests

Verify hook scripts respond correctly to events.

Test Cases: | Test | Input | Expected | |------|-------|----------| | Block dangerous command | rm -rf / | permissionDecision: "deny" | | Modify input | npm publish | updatedInput with --dry-run | | Auto-allow safe | echo hello | permissionDecision: "allow" | | Log success | PostToolUse + success | success: true in log | | Log failure | PostToolUse + error | success: false in log | | Context inject | UserPromptSubmit | stdout becomes context | | Stop control | Stop + incomplete | decision: "block" |

Hook Test JSON Format:

{
  "session_id": "test-001",
  "hook_event_name": "PreToolUse",
  "tool_name": "Bash",
  "tool_input": {"command": "rm -rf /important"},
  "cwd": "/tmp/test"
}

2. Plugin Tests

Verify plugin structure and component registration.

Validation Checks:

[ ] .claude-plugin/plugin.json exists and valid
[ ] commands/*.md have correct frontmatter
[ ] skills/*/SKILL.md have correct structure
[ ] agents/*.md have correct format
[ ] hooks/hooks.json is valid (if exists)

Plugin Structure Validation:

# Check required fields in plugin.json
jq -e '.name and .description' .claude-plugin/plugin.json

# Validate command frontmatter
for cmd in commands/*.md; do
  grep -q "^description:" "$cmd"
done

3. Agent Tests

Verify agent definitions and tool access.

Agent Test Cases: | Test | Check | |------|-------| | Tool list valid | All tools exist in Claude Code | | Description present | Non-empty description | | Prompt template | Valid prompt structure | | Model specification | Valid model (sonnet/opus/haiku) |

Test Runner API

Create Test Environment

create_test_env() {
    local TYPE="$1"  # hook, plugin, agent, full
    local TEST_DIR="/tmp/plugin-test-$(date +%s)"

    mkdir -p "$TEST_DIR/.claude/hooks/logs"
    mkdir -p "$TEST_DIR/.claude-plugin"
    mkdir -p "$TEST_DIR/commands"
    mkdir -p "$TEST_DIR/skills/test-skill"
    mkdir -p "$TEST_DIR/agents"

    # Generate based on type
    case "$TYPE" in
        hook) generate_hook_tests "$TEST_DIR" ;;
        plugin) generate_plugin_tests "$TEST_DIR" ;;
        agent) generate_agent_tests "$TEST_DIR" ;;
        full) generate_all_tests "$TEST_DIR" ;;
    esac

    echo "$TEST_DIR"
}

Run Tests

run_tests() {
    local TEST_DIR="$1"
    local RESULTS="$TEST_DIR/TEST-RESULTS.md"

    echo "# Test Results" > "$RESULTS"
    echo "Date: $(date)" >> "$RESULTS"

    # Hook tests
    if [ -d "$TEST_DIR/.claude/hooks" ]; then
        run_hook_tests "$TEST_DIR" >> "$RESULTS"
    fi

    # Plugin validation
    if [ -f "$TEST_DIR/.claude-plugin/plugin.json" ]; then
        validate_plugin "$TEST_DIR" >> "$RESULTS"
    fi

    # Agent validation
    if [ -d "$TEST_DIR/agents" ]; then
        validate_agents "$TEST_DIR" >> "$RESULTS"
    fi

    cat "$RESULTS"
}

Hook Test Templates

PreToolUse Guard Hook

#!/bin/bash
INPUT=$(cat)
TOOL_NAME=$(echo "$INPUT" | jq -r '.tool_name')
COMMAND=$(echo "$INPUT" | jq -r '.tool_input.command // ""')

# Block dangerous patterns
if echo "$COMMAND" | grep -qE "rm\s+-rf\s+/"; then
    jq -n '{
      "hookSpecificOutput": {
        "permissionDecision": "deny"
      },
      "systemMessage": "Dangerous command blocked"
    }'
    exit 0
fi

exit 0

PostToolUse Logger

#!/bin/bash
INPUT=$(cat)
TOOL_NAME=$(echo "$INPUT" | jq -r '.tool_name')
RESPONSE=$(echo "$INPUT" | jq -c '.tool_response // {}')

SUCCESS=true
echo "$RESPONSE" | grep -qiE "(error|failed)" && SUCCESS=false

jq -n --arg tool "$TOOL_NAME" --argjson success "$SUCCESS" \
    '{tool: $tool, success: $success, timestamp: now|todate}'

UserPromptSubmit Context Injector

#!/bin/bash
INPUT=$(cat)

# stdout becomes Claude context
echo "=== Test Context ==="
echo "Environment: TEST"
echo "Time: $(date)"
echo "==================="

exit 0

Plugin Validation

plugin.json Schema

{
  "name": "string (required)",
  "description": "string (required)",
  "version": "string (optional)",
  "author": {
    "name": "string",
    "email": "string"
  }
}

Command Frontmatter

---
description: Required description
argument-hint: Optional hint
allowed-tools: ["Tool1", "Tool2"]
---

Skill Structure

skills/skill-name/
├── SKILL.md          # Required
└── references/       # Optional
    └── *.md

Agent Validation

Agent Format

---
description: Agent description
allowed-tools: ["Read", "Write", "Bash"]
model: haiku  # or sonnet, opus
---

# Agent Name

Agent prompt content...

Valid Tools List

Read, Write, Edit, Bash, Glob, Grep, Task,
TodoWrite, WebFetch, WebSearch, AskUserQuestion,
NotebookEdit, NotebookRead, KillShell, Skill

Usage Examples

Test a Hook Script

# Simulate PreToolUse event
echo '{"hook_event_name":"PreToolUse","tool_name":"Bash","tool_input":{"command":"rm -rf /"}}' | \
    ./hook-script.sh

Validate Plugin Structure

# Quick validation
test -f .claude-plugin/plugin.json && \
    jq -e '.name' .claude-plugin/plugin.json && \
    echo "Plugin valid"

Test Agent Definition

# Check agent frontmatter
head -10 agents/my-agent.md | grep -E "^(description|allowed-tools|model):"

Test Results Format

# Test Results
Date: 2026-01-02

## Hook Tests
- ✅ Block dangerous rm
- ✅ Modify npm publish
- ✅ Auto-allow safe commands
- ✅ Log tool usage

## Plugin Validation
- ✅ plugin.json valid
- ✅ Commands have frontmatter
- ✅ Skills structured correctly

## Agent Validation
- ✅ All agents have descriptions
- ✅ Tool lists valid

## Summary
- Passed: 10/10
- Failed: 0/10

Integration with CI

# .github/workflows/test-plugin.yml
name: Plugin Tests
on: [push, pull_request]

jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - name: Create test environment
        run: ./scripts/create-test-env.sh
      - name: Run tests
        run: ./scripts/run-tests.sh
      - name: Upload results
        uses: actions/upload-artifact@v4
        with:
          name: test-results
          path: TEST-RESULTS.md

Agent Skills: Plugin Test Framework

Install this agent skill to your local

Skill Files