Mocha (JavaScript framework)
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 | |
| Developer(s) | OpenJS Foundation |
|---|---|
| Initial release | 22 November 2011 |
| Stable release | 10.0.0
/ 1 May 2022 |
| Repository | github |
| Written in | JavaScript |
| Platform | Node.js |
| Type | Test automation framework |
| License | MIT |
| Website | mochajs |
Mocha is a JavaScript test framework for Node.js programs, featuring browser support, asynchronous testing, test coverage reports, and use of any assertion library.[1]
Assertion libraries
Mocha can be used with most JavaScript assertion libraries, including:
- should.js
- express.js
- chai
- better-assert
- unexpected
Usage and examples
<syntaxhighlight lang="console"> $ npm install -g mocha $ mkdir test $ $EDITOR test/test.js # or open with your favorite editor </syntaxhighlight> <syntaxhighlight lang="javascript"> var assert = require("assert") describe('Foo', function(){
describe('#getBar(value)', function() {
it('should return 100 when value is negative') // placeholder
it('should return 0 when value is positive', function() {
assert.equal(0, Foo.getBar(10));
})
})
})
</syntaxhighlight>
<syntaxhighlight lang="console">
$ mocha
.
1 test complete (1ms)
</syntaxhighlight>
For asynchronous testing, invoke the callback, and Mocha will wait for completion.
<syntaxhighlight lang="javascript"> describe('Foo', function(){
describe('#bar()', function() {
it('should work without error', function(done) {
var foo = new Foo(128);
foo.bar(done);
})
})
}) </syntaxhighlight>
See also
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