qunit

What is qunit?

QUnit is a powerful, easy-to-use JavaScript unit testing framework. It is used to test any generic JavaScript code, including code running in the browser or in Node.js. QUnit is especially useful for testing jQuery projects.

What are qunit's main functionalities?

Basic Test

This feature allows you to write a basic test case. The `QUnit.test` function defines a test with a name and a callback function. The `assert.ok` method checks if the given expression is true.

QUnit.test('hello test', function(assert) {
  assert.ok(1 == '1', 'Passed!');
});

Asynchronous Testing

QUnit supports asynchronous testing. You can use async/await to handle asynchronous operations within your tests. The test will wait for the promise to resolve before making assertions.

QUnit.test('asynchronous test: async and await', async function(assert) {
  const result = await new Promise(resolve => setTimeout(() => resolve('done'), 1000));
  assert.equal(result, 'done', 'Passed!');
});

Module Grouping

QUnit allows you to group related tests using `QUnit.module`. You can also define setup and teardown logic using hooks like `beforeEach` and `afterEach`.

QUnit.module('group a', function(hooks) {
  hooks.beforeEach(function(assert) {
    assert.ok(true, 'beforeEach called');
  });
  QUnit.test('a basic test example', function(assert) {
    assert.ok(true, 'this test is fine');
  });
});

Other packages similar to qunit

mocha

Mocha is a feature-rich JavaScript test framework running on Node.js and in the browser, making asynchronous testing simple and fun. Mocha tests run serially, allowing for flexible and accurate reporting, while mapping uncaught exceptions to the correct test cases. Compared to QUnit, Mocha is more flexible and can be paired with various assertion libraries like Chai.

jest

Jest is a delightful JavaScript Testing Framework with a focus on simplicity. It works out of the box for most JavaScript projects and provides a rich API for writing tests. Jest includes built-in assertion libraries and mocking capabilities, making it a more integrated solution compared to QUnit.

jasmine

Jasmine is a behavior-driven development framework for testing JavaScript code. It does not depend on any other JavaScript frameworks and does not require a DOM. Jasmine is known for its easy-to-read syntax and is often compared to QUnit for its simplicity and ease of use.

README

QUnit testing framework for nodejs.

http://qunitjs.com

http://github.com/jquery/qunit

Features

• cli
• testrunner api
• test coverage via istanbul
• tests inside of one testfile run synchronous, but every testfile runs parallel
• tests from each file run in its own spawned node process
• same API for client and server side code (original QUnit is used)
• the simplest API of the world, especially for asynchronous testing
• you can write tests in TDD or BDD style depending on your task and test type
• you can run the same tests in browser if there is no dependencies to node
• generators support

Installation

$ npm i qunit

API

http://api.qunitjs.com

The only exception

// Separate tests into modules.
// Use `QUnit` namespace, because `module` is reserved for node.
QUnit.module(name, lifecycle)

Usage

Command line

Read full cli api doc using "--help" or "-h":

$ qunit -h

$ qunit -c ./code.js -t ./tests.js

By default, code and dependencies are added to the global scope. To specify requiring them into a namespace object, prefix the path or module name with the variable name to be used for the namespace object, followed by a colon:

$ qunit -c code:./code.js -d utils:utilmodule -t ./time.js

via api

var testrunner = require("qunit");

// Defaults:
{
    // logging options
    log: {

        // log assertions overview
        assertions: true,

        // log expected and actual values for failed tests
        errors: true,

        // log tests overview
        tests: true,

        // log summary
        summary: true,

        // log global summary (all files)
        globalSummary: true,

        // log coverage
        coverage: true,

        // log global coverage (all files)
        globalCoverage: true,

        // log currently testing code file
        testing: true
    },

    // run test coverage tool
    coverage: false,

    // define dependencies, which are required then before code
    deps: null,

    // define namespace your code will be attached to on global['your namespace']
    namespace: null,

    // max amount of ms child can be blocked, after that we assume running an infinite loop
    maxBlockDuration: 1000
}

// change any option for all tests globally
testrunner.options.optionName = value;

// or use setup function
testrunner.setup({
    log: {
        summary: true
    }
});


// one code and tests file
testrunner.run({
    code: "/path/to/your/code.js",
    tests: "/path/to/your/tests.js"
}, callback);

// require code into a namespace object, rather than globally
testrunner.run({
    code: {path: "/path/to/your/code.js", namespace: "code"},
    tests: "/path/to/your/tests.js"
}, callback);

// one code and multiple tests file
testrunner.run({
    code: "/path/to/your/code.js",
    tests: ["/path/to/your/tests.js", "/path/to/your/tests1.js"]
}, callback);

// array of code and test files
testrunner.run([
    {
        code: "/path/to/your/code.js",
        tests: "/path/to/your/tests.js"
    },
    {
        code: "/path/to/your/code.js",
        tests: "/path/to/your/tests.js"
    }
], callback);

// using testrunner callback
testrunner.run({
    code: "/path/to/your/code.js",
    tests: "/path/to/your/tests.js"
}, function(err, report) {
    console.dir(report);
});

// specify dependency
testrunner.run({
    deps: "/path/to/your/dependency.js",
    code: "/path/to/your/code.js",
    tests: "/path/to/your/tests.js"
}, callback);

// dependencies can be modules or files
testrunner.run({
    deps: "modulename",
    code: "/path/to/your/code.js",
    tests: "/path/to/your/tests.js"
}, callback);

// dependencies can required into a namespace object
testrunner.run({
    deps: {path: "utilmodule", namespace: "utils"},
    code: "/path/to/your/code.js",
    tests: "/path/to/your/tests.js"
}, callback);

// specify multiple dependencies
testrunner.run({
    deps: ["/path/to/your/dependency1.js", "/path/to/your/dependency2.js"],
    code: "/path/to/your/code.js",
    tests: "/path/to/your/tests.js"
}, callback);

Writing tests

QUnit API and code which have to be tested are already loaded and attached to the global context.

Some tests examples

test("a basic test example", function () {
    ok(true, "this test is fine");
    var value = "hello";
    equal("hello", value, "We expect value to be hello");
});

QUnit.module("Module A");

test("first test within module", 1, function () {
    ok(true, "a dummy");
});

test("second test within module", 2, function () {
    ok(true, "dummy 1 of 2");
    ok(true, "dummy 2 of 2");
});

QUnit.module("Module B", {
    setup: function () {
        // do some initial stuff before every test for this module
    },
    teardown: function () {
        // do some stuff after every test for this module
    }
});

test("some other test", function () {
    expect(2);
    equal(true, false, "failing test");
    equal(true, true, "passing test");
});

QUnit.module("Module C", {
    setup: function() {
        // setup a shared environment for each test
        this.options = { test: 123 };
    }
});

test("this test is using shared environment", 1, function () {
    deepEqual({ test: 123 }, this.options, "passing test");
});

test("this is an async test example", function () {
    expect(2);
    stop();
    setTimeout(function () {
        ok(true, "finished async test");
        strictEqual(true, true, "Strict equal assertion uses ===");
        start();
    }, 100);
});

Generators support

test("my async test with generators", function* () {
    var data = yield asyncFn();
    equal(data, {a: 1}, 'generators work');
});

Run tests

$ npm i
$ npm test

Coverage

Code coverage via Istanbul. To utilize, install istanbul and set option coverage: true or give a path where to store report coverage: {dir: "coverage/path"} or pass --cov parameter in the shell. Coverage calculations based on code and tests passed to node-qunit.