@web/test-runner-mocha
Advanced tools
Test framework implementation of Mocha for Web Test Runner
See @web/test-runner for a default implementation and CLI for the test runner.
Mocha relies on global variables, in any JS test file describe and it are available globally and can be used directly:
describe('my test', () => {
it('foo is bar', () => {
if ('foo' !== 'bar') {
throw new Error('foo does not equal bar');
}
});
});
If you're writing tests as HTML, you can import this library to run tests with mocha:
<html>
<body>
<script type="module">
// after importing "@web/test-runner-mocha", describe and it will be available globally
import { runTests } from '@web/test-runner-mocha';
describe('my test', () => {
it('foo is bar', () => {
if ('foo' !== 'bar') {
throw new Error('foo does not equal bar');
}
});
});
// you need to call runTests() when you've loaded all your tests
runTests();
</script>
</body>
</html>
Configuring mocha to use TDD is not yet supported.
Web Test Runner is based on bundle-free development, and runs your tests in the browser without any modification. This means you need to make sure your tests, code and test libraries can work in the browser as is. For example they should be standard es modules.
The test runner server can be configured to do some code transformations on the fly, although this may impact performance. Check out the docs to learn more about that.
@open-wc/testing is a general purpose library, including assertions via chai, HTML test fixtures, a11y tests and test helpers.
It is an opinionated implementation which brings together multiple libraries. You could also use the individual libraries together:
For stubbing and mocking, we recommend sinon which ships an es module variant out of the box:
import { stub, useFakeTimers } from 'sinon';
FAQs
Mocha test framework for Web Test Runner
The npm package @web/test-runner-mocha receives a total of 67,040 weekly downloads. As such, @web/test-runner-mocha popularity was classified as popular.
We found that @web/test-runner-mocha demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 7 open source maintainers collaborating on the project.
Did you know?
Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.
Security News
Socket and Seal Security collaborate to fix a critical npm overrides bug, resolving a three-year security issue in the JavaScript ecosystem's most popular package manager.
Security News
TypeScript is porting its compiler to Go, delivering 10x faster builds, lower memory usage, and improved editor performance for a smoother developer experience.
Research
Security News
The Socket Research Team has discovered six new malicious npm packages linked to North Korea’s Lazarus Group, designed to steal credentials and deploy backdoors.