karma-skill
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".
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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/lambdatest/agent-skills --skill karma-skill- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads karma-skill automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
Karma Testing Skill
Core Patterns
karma.conf.js
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
describe('StringUtils', () => {
it('should capitalize first letter', () => {
expect(StringUtils.capitalize('hello')).toBe('Hello');
});
it('should handle empty string', () => {
expect(StringUtils.capitalize('')).toBe('');
});
});
Angular Integration
// 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 |
FAQ
What does the karma-skill skill do?
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".
How do I install karma-skill?
Run npx skills add https://github.com/lambdatest/agent-skills --skill karma-skill in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/karma-skill/ (personal) or .claude/skills/karma-skill/ (project).
Which AI agents can use karma-skill?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is karma-skill safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains karma-skill?
It is published by lambdatest in lambdatest/agent-skills. It has 217 recorded installs.
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