Testing - Test View for Python with multi-root workspace

Refs: #15750

• macOS @sandy081
• linux @roblourens
• windows @meganrogge

Complexity: 3

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Requirements

1. Install python extension from here: https://pvsc.blob.core.windows.net/extension-builds/ms-python-insiders.vsix
2. Make sure you have "python.experiments.optInto": ["All"], in your user settings. If you did not have it, add it and reload.

Testing

1. Open either this project https://github.com/karthiknadig/multiroot_pytest_sample or create a project layout similar to that.
2. Create a virtual environment in the repo directory and install pytest.
   1. Navigate to the repo directory in the terminal.
   2. Then use following commands to create virtual envs
      1. For windows, you can use this command py -3 -m venv .venv
      2. For mac/linux you can use the command python3 -m venv .venv Note: For linux users you may not have venv available out of the box. Please install python3-venv via apt.
   3. Activate the virtual environment:
      1. For windows : run the activate binary .\.venv\Scripts\activate
      2. For linux/mac (bash): run source ./.venv/bin/activate . Note: If you use other terminal shells there are scripts under Scripts or bin directory that should work for your preferred shell.
   4. Once activated you should see the name of the env in the prompt. Run the following command to install pytest: python -m pip install pytest
3. Activate the python extension and select the virtual environment that you just created. Depending on where you create the virtual environment it may or may not show up in the quick pick. But you can always browse to it and select it.
4. If you created your own files, then configure each project root for testing using the python: configure test command. Otherwise you should see the tests in the test view.
5. Run the tests, add more files or test and see the Test UI update accordingly.

[karthiknadig]

@sandy081 That is not in the scope of this testing plan item. You can skip that.

You can re-select that python by running Python: Select interpreter command

[karthiknadig]

@roblourens that is a know issue #16170, #16613