How to run Run only a Single test in Visual Studio Code and Python with output

Question

Does anyone know how to run only one python test with Test Explorer in Visual Studio Code?

I have installed https://marketplace.visualstudio.com/items?itemName=LittleFoxTeam.vscode-python-test-adapter.

I am using pytest.

In the picture below:

If I press "Run Test" then only one test runs, but I do not see any log / output.

To see the output I have to press "Run", but this runs all my tests. This is incredibly frustrating.

I would like to be able to run only the one test with the Visual Studio Code interface and see the log for this run.

Answer 1

I did not find one elegant way to just run one test and then see the correct sampled/collected output from that test, but I found a way to run only the test I was working on by tagging it with:

@pytest.mark.run_this_test

and hit F5 anywhere in VSCode to just run this test over and over again. The PyTest debug config looks like this:

{
    "name": "PyTest",
    "type": "python",
    "request": "launch",
    "console": "integratedTerminal",
    "module": "pytest",
    "args": [
        "-s", "-m run_this_test"
    ],
    "justMyCode": false,
    "pythonPath": "${config:python.pythonPath}",
    "env": {
        "PYTHONPATH": "${workspaceRoot}"
}

This 'tagging' does not scale in a team obviously, but it works for me alone.

I created a repo containing my solution: https://bitbucket.org/geircode/vscode-testsetup-python

To test it:

• run the script "requirements.install.bat"
• open vscode in the root folder
• select "PyTest" in the "debug and run" tab
• Hit F5 to start debugging and see the correct output from the test

Answer 2

From VS Code test explorer it's possible. Hope this helps.