unittest2 vs Mocha comparison of testing frameworks
What are the differences between unittest2 and Mocha?




Programming language




Unit Testing

Unit Testing, Intergration Testing, End-to-End Testing

General info

Unittest2 is a newer version on the inbuilt unit testing framework unittest

To use o use unittest2 instead of unittest, simply replace 'import unittest' with 'import unittest2'. It has many new features such as: - addCleanups for better resource management; -many new assert methods; - assertRaises as context manager, with access to the exception afterwards; - test discovery and new command line options (including failfast and better handling of ctrl-C during test runs); - class and module level fixtures: setUpClass, tearDownClass, setUpModule, tearDownModule; -test skipping and expected failures and many more improvements on the API and bug fixes

Mocha is a widely used JavaScript test framework for Node.js

Mocha is a simple, flexible and the one of the widely adopted JS test framework. Mocha usually runs tests serially which enables the accurate reporting. Also it's useful for asynchronous testing, and provides various king of test reports. Spec is default test reporter for mocha, there are many test reports like Nyan, Dot matrix, Tap, Landing strip, List and Progress. Mocha is being used with many other test frameworks like Selenium WebDriver, Webdriver.io, wd and Cypress
Set of frameworks originating from SUnit (Smalltalk's testing framework). They share similar structure and functionality.


unittest2 is a newer version of unittest which is an xUnit style framework for Python.


It has an XUnit reporter available which outputs an XUnit-compatible XML document, often applicable in CI servers.
Allows testing code execution on the client, such as a web browser


Front-end functionality and behaviour can be tested by unittest2. function by function


Mocha Runs in the browser and is used widely to test front-end components and functionality. It can test various DOM elements, front-end functions and so on.
Allows testing the bahovior of a server-side code


We can write tests with unittest2 to test each function for server-side behaviour


Mocha provides convenient ways of testing the Node server.It works well with Chai (an assertion library) where it provides the environment for writing server-side tests while we write the tests with Chai
Allows defining a fixed, specific states of data (fixtures) that are test-local. This ensures specific environment for a single test


By use of the 'setUp()' function which is called to prepare the test fixture

Mocha provides the hooks before(), after(), beforeEach(), and afterEach() to set up preconditions and clean up after your tests
Group fixtures
Allows defining a fixed, specific states of data for a group of tests (group-fixtures). This ensures specific environment for a given group of tests.


unittest2 allows you to group your initialization code buy use of the 'setUp()' function and clean up code with a 'tearDown()' function


Mocha allows grouping of fixtures
Supports data generators for tests. Data generators generate input data for test. The test is then run for each input data produced in this way.


unittest2 contains generator methods in the module 'unittest.TestCase'

Licence type governing the use and redistribution of the software

MIT License

MIT License

Mocks are objects that simulate the behavior of real objects. Using mocks allows testing some part of the code in isolation (with other parts mocked when needed)


Mocks are available from the library unittest.mock which allows you to replace parts of your system under test with mock objects

Provides Mocking capabilities through third party libraries like sinon.js, simple-mock and nock
Allows organizing tests in groups


One can build suites either manually or use test discovery to build the suite automatically by scanning a directory


Grouping is supported and is accomplished by the using a nested 'describe()'
Other useful information about the testing framework