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Unit testing of Shopware plugins

To successfully launch a Shopware plugin that will provide the features for a merchant and generate profits for the developers, it is necessary to perform the testing of a plugin. Among different testing methods and procedures, unit testing remains a crucial way to perform tests that will help identify the problems and test a plugin before implementing it into a store. In this regard, we will review the process of unit testing plugins for Shopware 6.

Why is unit testing important?

Performing unit testing is integral to software development because it allows testing the applications before launching them and making other tests. The primary purpose of unit testing is to run tests for the individual components and code snippets. Unit testing aims to test the logic of independent lines of codes and components by isolating them from the rest of an application. This method requires making test scripts and cases to identify the performance of the individual components. By performing unit testing, it is possible to fix the potential issues in the early stages and change the code base. Usually, the developers test the components that can affect the overall work of software. However, the complicated part of unit testing is the notion that it could require writing multiple lines of code for testing just one line.

Unit testing for Shopware plugins

Unit testing of Shopware plugins involves working with plugin bases. With Shopware, one needs to know the Symphony framework, which is based on PHP. Configuring PHP requires creating the file phpunit.xml.dist in the root directory of a plugin. Another important step of the unit testing is to create mocking services. In particular, to perform specific commands and provide parameters for the testing which would work only in the testing environment, the file <plugin root>/Resources/config/services_test.{xml|yml} should be created. This file will override the usual services.{xml|yml} file and will be used only for running tests.

The common method of performing the unit test for the Shopware plugins is to use cli tools. This tool allows you to easily identify the code snippets for testing and run the test for the needed components. Another crucial helper for unit testing is Bootstrap with the file Bootstrap.php , which helps to create the testing environment and initialize the shop context. Nevertheless, more detailed instructions on the unit testing for Shopware plugins is available in the official documentation.

Bottom line

Consequently, unit testing is a significant aspect of making sure that the code works properly in the early stages of development. Testing the individual components and functions during the development allows us to identify what should be fixed and what aspects require more work. Even though unit testing might be complicated in terms of execution for every code component, this method ensures that developers save time and money by preventing issues before releasing software for other tests.

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