Skill v1.0.1

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lambdatest/agent-skills/karma-skill

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PublishedAugust 9, 2026 at 09:09 PM

Content Hashsha256:100923d30e686cb4...

Git SHA0491a3a29aa1

Bump Typepatch

Compare with v1.0.0

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SKILL.md3.1 KBactive

SKILL.md · 117 lines · 3.1 KB

version: "1.0.1" name: karma-skill description: > Generates Karma test runner configurations for browser-based JavaScript testing. Works with Jasmine, Mocha, or QUnit. Use when user mentions "Karma", "karma.conf.js", "browser test runner". Triggers on: "Karma", "karma.conf", "karma test runner", "browser-based JS test". languages:

JavaScript
TypeScript

category: unit-testing license: MIT metadata: author: TestMu AI version: "1.0"

Karma Testing Skill

Core Patterns

karma.conf.js

javascript

module.exports = function(config) {
  config.set({
    basePath: '',
    frameworks: ['jasmine'],
    files: [
      'src/**/*.js',
      'test/**/*.spec.js'
    ],
    preprocessors: {
      'src/**/*.js': ['coverage']
    },
    reporters: ['progress', 'coverage'],
    coverageReporter: {
      type: 'html',
      dir: 'coverage/'
    },
    port: 9876,
    colors: true,
    logLevel: config.LOG_INFO,
    autoWatch: true,
    browsers: ['Chrome', 'Firefox'],
    singleRun: false,
    concurrency: Infinity,
    // LambdaTest cloud browsers
    customLaunchers: {
      ChromeLT: {
        base: 'WebDriver',
        config: {
          hostname: 'hub.lambdatest.com',
          port: 80
        },
        browserName: 'Chrome',
        version: 'latest',
        name: 'Karma Test',
        tunnel: true,
        user: process.env.LT_USERNAME,
        accessKey: process.env.LT_ACCESS_KEY
      }
    }
  });
};

Test with Jasmine Framework

javascript

describe('StringUtils', () => {
  it('should capitalize first letter', () => {
    expect(StringUtils.capitalize('hello')).toBe('Hello');
  });
  it('should handle empty string', () => {
    expect(StringUtils.capitalize('')).toBe('');
  });
});

Angular Integration

javascript

// karma.conf.js for Angular
frameworks: ['jasmine', '@angular-devkit/build-angular'],
plugins: [
  require('karma-jasmine'),
  require('karma-chrome-launcher'),
  require('karma-coverage'),
  require('@angular-devkit/build-angular/plugins/karma')
],

Setup: `npm install karma karma-jasmine karma-chrome-launcher karma-coverage --save-dev`

Run: `npx karma start` or `npx karma start --single-run`

Init: `npx karma init karma.conf.js`

Deep Patterns

See reference/playbook.md for production-grade patterns:

Section	What You Get
§1 Production Configuration	Full karma.conf.js with coverage thresholds, reporters, CI launchers
§2 Component Testing	Service mocking, DOM interaction, form validation patterns
§3 HTTP Service Testing	HttpTestingController, error handling, retry testing
§4 Directive & Pipe Testing	Host component pattern, custom pipes with edge cases
§5 RxJS & Async Patterns	debounceTime, switchMap cancellation, subscription cleanup
§6 Router & NgRx Testing	RouterTestingModule, MockStore, selector overrides
§7 LambdaTest Integration	Cloud browser configuration for cross-browser testing
§8 CI/CD Integration	GitHub Actions with coverage, test reporting
§9 Debugging Table	12 common problems with causes and fixes
§10 Best Practices	14-item checklist for production Angular testing

← v1.0.0 All versions

Skill v1.0.1

Karma Testing Skill

Core Patterns

karma.conf.js

Test with Jasmine Framework

Angular Integration

Setup: npm install karma karma-jasmine karma-chrome-launcher karma-coverage --save-dev

Run: npx karma start or npx karma start --single-run

Init: npx karma init karma.conf.js

Deep Patterns

Setup: `npm install karma karma-jasmine karma-chrome-launcher karma-coverage --save-dev`

Run: `npx karma start` or `npx karma start --single-run`

Init: `npx karma init karma.conf.js`