Testing

Overview

This page explains the testing set up, as well as the basic testing fundamentals used for testing the frontend.

Frameworks

Here are the two main frameworks used for testing JS code in general as well as React components: * Jest Main testing framework for JS/TS testing * Babel JavaScript compiler to compile Reacts JSX syntax to JavaScript

Fundamentals

• Run all tests by executing following command in the root directory: npm test
• Test file names shouold follow following structure to be detected by jest: <NAME OF COMPONENT TO TEST>.test.<js/ts/jsx/tsx>
• Test files should be in the same directory as the component under test
• jest configuration file: https://github.com/MathGrass/mathgrass-frontend/blob/develop/jest.config.js
• babel configuration file: https://github.com/MathGrass/mathgrass-frontend/blob/develop/babel.config.json

Testing with Redux Store

A main aspect of the MathGrass Frontend application is the global redux store, which handles the applications state. There are two ways of testing with the redux store: * Work with a mocked store using redux-mock-store * Work with an instance of the real store In order to work with the real store some dispatch functions have been added to make testing easier (e.g. resetting the store).

Examples

So far only unit tests have been implemented. Examples of how to test React components can be seen in the test file for the assessment component. To see an example of how a service is tested have a look at the websocket service test.