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Test Analyzer MCP Server

by giri-jeedigunta
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JavaScript
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Test Analyzer MCP Server

A Model Context Protocol (MCP) server that provides tools for analyzing unit test setups, checking coverage, and generating comprehensive test reports for JavaScript/TypeScript projects.

Features

  • 🔍 Framework Detection: Automatically detects Jest, Vitest, Mocha, Cypress, and Playwright

  • 📊 Coverage Analysis: Detailed coverage metrics with visual feedback

  • 📁 Test Discovery: Finds and analyzes all test files in your project

  • 🎯 Smart Recommendations: Actionable insights to improve your testing strategy

  • 🚀 Frontend Focused: Optimized for React, Vue, Angular, and other frontend frameworks

Installation

The server is already configured in your MCP settings at:

/Users/venkatagiribabu.jeedigunta/Library/Application Support/Code/User/globalStorage/saoudrizwan.claude-dev/settings/cline_mcp_settings.json

Available Tools

1. analyze_test_setup

Analyzes the complete unit test setup of a repository.

Parameters:

  • repoPath (required): Path to the repository to analyze

Returns:

  • Framework name (jest, vitest, mocha, etc.)

  • List of test files found

  • Total test count

  • Test structure (suites, tests, hooks)

  • Coverage configuration

  • Testing dependencies

  • Summary report

2. check_coverage

Checks test coverage for a repository with detailed metrics.

Parameters:

  • repoPath (required): Path to the repository

  • runTests (optional, default: false): Whether to run tests to generate fresh coverage data

Returns:

  • Line coverage percentage

  • Statement coverage percentage

  • Function coverage percentage

  • Branch coverage percentage

  • Visual status indicators (✅ Good, ⚠️ Fair, ❌ Poor)

  • Overall coverage summary

3. get_test_summary

Generates a comprehensive test analysis report.

Parameters:

  • repoPath (required): Path to the repository

Returns:

  • Complete test setup overview

  • Coverage metrics with visual feedback

  • Categorized dependencies

  • Actionable recommendations

  • Markdown-formatted report

Sample Queries

Here are example queries you can use with Claude when this MCP server is active:

Basic Analysis

"Analyze the test setup for the project at /Users/me/projects/my-react-app" "Check what testing framework is being used in /path/to/project" "Find all test files in my current project"

Coverage Analysis

"Check the test coverage for /Users/me/projects/my-app" "Run tests and get fresh coverage data for the project at /path/to/repo" "What's the current test coverage status? Is it meeting the thresholds?"

Comprehensive Reports

"Give me a complete test analysis report for /Users/me/projects/frontend-app" "Generate a test summary with recommendations for improving coverage" "Analyze the testing setup and suggest improvements"

Specific Inquiries

"How many tests are in the project at /path/to/repo?" "What testing dependencies are installed in this project?" "Is coverage reporting configured properly?" "Which test files have been created in this project?"

Supported Test Frameworks

Unit Testing

  • Jest - Detected via jest.config.js, package.json

  • Vitest - Detected via vitest.config.js, vite.config.js

  • Mocha - Detected via .mocharc.js, .mocharc.json

E2E Testing

  • Cypress - Detected via cypress.config.js, cypress.json

  • Playwright - Detected via playwright.config.js

Supported Coverage Tools

  • Jest Coverage (built-in)

  • NYC/Istanbul (.nycrc, .nycrc.json)

  • C8 (V8 coverage)

  • Vitest Coverage (@vitest/coverage-c8, @vitest/coverage-istanbul)

Test File Patterns

The server automatically detects test files matching these patterns:

  • **/*.test.{js,jsx,ts,tsx}

  • **/*.spec.{js,jsx,ts,tsx}

  • **/__tests__/**/*.{js,jsx,ts,tsx}

  • test/**/*.{js,jsx,ts,tsx} (Mocha)

  • cypress/integration/**/* (Cypress)

  • cypress/e2e/**/* (Cypress)

  • **/*.cy.{js,jsx,ts,tsx} (Cypress component tests)

  • tests/**/*.{js,jsx,ts,tsx} (Playwright)

  • e2e/**/*.{js,jsx,ts,tsx} (E2E tests)

Coverage Thresholds

The server evaluates coverage based on these thresholds:

  • ✅ Good: ≥ 80% coverage

  • ⚠️ Fair: ≥ 60% coverage

  • ❌ Poor: < 60% coverage

Example Output

Test Setup Analysis

{ "framework": "jest", "testFiles": ["src/__tests__/utils.test.js", "src/components/Button.test.tsx"], "testCount": 25, "testStructure": { "suites": 10, "tests": 25, "hooks": ["beforeEach", "afterEach"] }, "dependencies": ["jest@29.5.0", "@testing-library/react@14.0.0"] }

Coverage Report

Coverage Summary: - Lines: 85.5% ✅ Good - Statements: 84.2% ✅ Good - Functions: 78.9% ⚠️ Fair - Branches: 72.3% ⚠️ Fair Overall: ⚠️ Fair

Recommendations

## Recommendations - 🟡 Branch coverage is below 80%. Add tests for different code paths. - 🟡 Function coverage could be improved. Consider testing utility functions. - ✅ Line coverage is good! Keep maintaining high standards.

Advanced Usage

Analyzing Multiple Projects

You can analyze multiple projects in sequence:

"First analyze tests for /project1, then compare with /project2"

CI/CD Integration Ideas

"Check if the coverage meets our 80% threshold for CI" "Generate a test report for the pull request review"

Test Improvement Workflow

1. "Analyze current test setup" 2. "Check which files have low coverage" 3. "Suggest test cases for uncovered branches" 4. "Re-run coverage after adding tests"

Troubleshooting

No Framework Detected

  • Ensure package.json exists in the repository

  • Check if test framework is in devDependencies

  • Verify configuration files are present

No Coverage Data Found

  • Run tests with runTests: true parameter

  • Ensure coverage is configured in test framework

  • Check if coverage directory exists after running tests

No Test Files Found

  • Verify test files follow common naming patterns

  • Check if tests are in excluded directories (node_modules, dist, build)

  • Ensure file extensions match (.test.js, .spec.ts, etc.)

Development

Adding New Frameworks

To support additional test frameworks, update the frameworks array in the server implementation with:

  • Framework name

  • Configuration file patterns

  • Test file patterns

Extending Coverage Support

The server can be extended to support additional coverage formats by:

  • Adding new file patterns to coverageFiles array

  • Implementing parsers for specific coverage formats

  • Supporting additional coverage reporters

License

ISC

Author

Giri - https://github.com/giri-jeedigunta/

Cline MCP screenshots

Deploy Server
A
security – no known vulnerabilities
F
license - not found
A
quality - confirmed to work

How are these scores calculated?

local-only server

The server can only run on the client's local machine because it depends on local resources.

Tools

Enables comprehensive analysis of JavaScript/TypeScript project testing setups by detecting frameworks like Jest, Vitest, and Cypress, analyzing test coverage metrics, and generating actionable recommendations for improving test quality. Provides detailed insights into test structure, dependencies, and coverage thresholds with visual feedback.

  1. Features
    1. Installation
      1. Available Tools
        1. 1. analyze_test_setup
        2. 2. check_coverage
        3. 3. get_test_summary
      2. Sample Queries
        1. Basic Analysis
        2. Coverage Analysis
        3. Comprehensive Reports
        4. Specific Inquiries
      3. Supported Test Frameworks
        1. Unit Testing
        2. E2E Testing
      4. Supported Coverage Tools
        1. Test File Patterns
          1. Coverage Thresholds
            1. Example Output
              1. Test Setup Analysis
              2. Coverage Report
              3. Recommendations
            2. Advanced Usage
              1. Analyzing Multiple Projects
              2. CI/CD Integration Ideas
              3. Test Improvement Workflow
            3. Troubleshooting
              1. No Framework Detected
              2. No Coverage Data Found
              3. No Test Files Found
            4. Development
              1. Adding New Frameworks
              2. Extending Coverage Support
            5. License
              1. Author
                1. Cline MCP screenshots

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