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


Programming language




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

General info

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,, wd and Cypress

Concordion is a tool used to write and manage automated acceptance tests in Java based projects

Concordion specifications are written in Markdown, HTML or Excel and then instrumented with special links, attributes or comments respectively. When the corresponding test fixture class is run, Concordion interprets the instrumentation to execute the test. Concordion lets you write them in normal language using paragraphs, tables and proper punctuation. This makes specification more natural to read and write, and helps everyone to understand and agree about what a feature is supposed to do.
Set of frameworks originating from SUnit (Smalltalk's testing framework). They share similar structure and functionality.


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


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.


You can specify tests for front-end components and functionality with concordion
Allows testing the bahovior of a server-side code


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


You can test server-side components and functionality with concordion.
Allows defining a fixed, specific states of data (fixtures) that are test-local. This ensures specific environment for a single test

Mocha provides the hooks before(), after(), beforeEach(), and afterEach() to set up preconditions and clean up after your tests


Concordion contains fixtures which correspond to a specific instrumentation within the code. That is when specifications are written they are instrumented with special links, attributes or comments which are then run with their corresponding fixtures
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.


Mocha allows grouping of fixtures


One can group fixtures in concordion
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.


Licence type governing the use and redistribution of the software

MIT License

Apache License 2.0

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)

Provides Mocking capabilities through third party libraries like sinon.js, simple-mock and nock


By use of third party libraries like mockito
Allows organizing tests in groups


Grouping is supported and is accomplished by the using a nested 'describe()'


One can group tests into suites
Other useful information about the testing framework