Testing - Test View for Python `unittest`

[karthiknadig]

Refs: #15750

• macOS @DonJayamanne
• linux @gregvanl
• windows @alexr00

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 an empty folder in VS Code.
2. Add following unittest code (name your file my_tests.py). Do not name it unittest.py that will override the unittest library:

import unittest
class PassingTests(unittest.TestCase):
    def test_passing(self):
        self.assertEqual(42, 42)
    def test_passing_still(self):
        self.assertEqual("silly walk", "silly walk")
class FailingTests(unittest.TestCase):
    def test_failure(self):
        self.assertEqual(42, -13)
    def test_failure_still(self):
        self.assertEqual("I'm right!", "no, I am!")

3. Select any python version.
4. You can either configure tests using Python: configure tests... command from the command pallet, or go the test view and configure by using the welcome view, or you can run tests to get a prompt to configure.
5. Select unittest framework.
6. You should see the tests in the test view. Run the tests.
7. Add your own test methods, or add another test file, the test UI should update accordingly.

[alexr00]

I followed both of the Requirements steps, but I wasn't able to get this working. Am I missing something?

[gregvanl]

@alexr00 It looks like the test file detection is really fragile. For example if you specify searching for the pattern "*test.py", it will detect a file called "utest.py" but not with more than one character (for example "untest.py").
I was able to get detection to work most reliably with just "test.py".
I'll enter an issue.

[alexr00]

Tried your suggestion @gregvanl of naming the file utest.py, but it still doesn't work.