Mocha Testing Framework
Qualified supports the Mocha testing framework, in a BDD or TDD setup.
The following is a Mocha TDD example on how to use the framework using the built in Node.js assertion library:
const assert = require("assert");
suite('Array', () => {
suiteSetup(() => { /* optional code to run before the entire suite */ });
setup(() => { /* optional code to run before each test */ });
teardown(() => { /* optional code to run after each test */ });
suiteTeardown(() => { /* optional code to run after the entire suite */ });
suite('#indexOf()', () => {
test('should return -1 when not present', () => {
assert.strictEqual(-1, [1,2,3].indexOf(4));
});
});
});Assertions
Mocha allows you to use any assertion library you want and so does not auto-require a certain library for you by default.
Chai
We recommend that you use the Chai BDD/TDD assertion library. It supports the following assertion styles:
Expect
const {expect} = require("chai");
expect(foo).to.be.a('string');
expect(foo).to.equal('bar');
expect(foo).to.have.length(3);
expect(tea).to.have.property('flavors').with.length(3);Assert
const {assert} = require("chai");
assert.typeOf(foo, 'string');
assert.strictEqual(foo, 'bar');
assert.lengthOf(foo, 3)
assert.property(tea, 'flavors');
assert.lengthOf(tea.flavors, 3);