PyCharm enables usage of the following testing frameworks:
| Framework | Code completion | Run/debug configuration | Ability to create a test | Navigation between tests and tests subjects | Ability to run tests | Code inspections |
|---|---|---|---|---|---|---|
| Python unittests | Yes | Yes | Yes | Yes | Yes | Partially |
| Pytest | Yes | Yes | Yes | Yes | Yes | Yes |
| Python nosetests | Partially | Yes | Yes | Yes | Yes | Partially |
| tox | No | Yes | No | No | Yes | Partially |
| TwistedTrial | Yes | Yes | Yes | Yes | Yes | N/A |
| Python doctests | N/A | Yes | No | N/A | Yes | Yes |
Available only in PyCharm Professional | ||||||
| BDD Testing Framework | Yes | Yes | Yes (for step definitions) | Yes (between steps and features) | Yes | Partially |
Before you start working with the testing framework of your choice, make sure that the desired framework is installed on your machine. Refer to the framework documentation for the installation details.
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If you are running a version of Python prior to 3.3 you must specify the number of processes to run simultaneously (e.g. Finally, if you want to run tests under a more strenuous set of settings, you can run test as./.
PyCharm auto-detects a test runner that is installed on your Python interpreter and uses it to run tests. Still, you always have an option to explicitly specify the required test runner in the project settings.
Set a testing framework
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To set a test runner, press Ctrl+Alt+S to open the IDE settings and select Tools | Python Integrated Tools, and then select the target test runner from the Default test runner list.
Choose the desired test runner:
If the selected test runner is missing in the specified interpreter, the appropriate notification appears.
Click the Fix button to download and install the corresponding framework.
- Supporting Pytest¶. Pytest provides a rich execution and reporting environment for tests and can be used to run multiple test files together. The pytest scheme for discovering tests inside Python modules is much more flexible than that provided by unittest, but test files should not take advantage of that flexibility as it can lead to inconsistency in test reports that depend on the.
- Run tests that failed in the most recent test run. Similar to Python: Run Failed Tests on versions prior to 2021.9. Test: Rerun Last Run: Debug tests that were executed in the most recent test run. Test: Run All Tests: Run all discovered tests. Equivalent to Python: Run All Tests on versions prior to 2021.9. Test: Run Test at Cursor.
By default, the suggested default test runner is unittest. However, you can redefine the default framework and change it to nosetest, pytest or TwistedTrial.
Change the default testing framework
From the main menu, select File | New Project Setup | Settings for New Projects for Windows and Linux, or File | New Project Setup | Preferences for New Projects for macOS.
Select Tools | Python Integrated Tools.
In the Testing area, select the test runner that will be default for all newly created projects.
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With the test runner selected, PyCharm suggests the appropriate default run/debug configuration:
If a user already has the testing run/debug configuration for a specific file and for a specific testing framework, then PyCharm will launch this run/debug configuration, regardless of your chosen default test runner. For more details in how to change or delete such a configuration, see Run/debug configurations.