Run Test | Debug Test disappear on save, then re-appear when tabbing on/off the file.

[amittleider]

Environment data

• VS Code version: 1.27.2
• Extension version (available under the Extensions sidebar): 2018.8.0
• OS and version: Ubuntu 16.04
• Python version (& distribution if applicable, e.g. Anaconda): Python 3.6.3
• Type of virtual environment used (N/A | venv | virtualenv | conda | ...): venv

Actual behavior

I have 2 files, test_vscode1.py and test_vscode2.py. I first discover the unit tests to get the Run Test | Debug Test buttons. Next, I remove the i = 0 line and re-save the file. The Run Test | Debug Test disappears permanently if I stay on this file. Next, I tab to the test_vscode1.py file and back to the test_vscode2.py file and the Run Test | Debug Test buttons re-appear.

Expected behavior

Don't make the Run Test | Debug Test buttons disappear on save.

Steps to reproduce:

1. See the description above

Logs

Output for Python in the Output panel (View→Output, change the drop-down the upper-right of the Output panel to Python)

Just a bunch of nose discovery stuff, don't think it's useful

Output from Console under the Developer Tools panel (toggle Developer Tools on under Help)

devlogs.txt

[DonJayamanne]

I'm unable to replicate this issue.
Please could you provide a sample repo I can use to replicate this at my end.

[amittleider]

Thanks for taking a look @DonJayamanne .

I have set up a repro in this repo: https://github.com/amittleider/vscode_python_bug_repro .

Here are the steps:

cd ~/mysource
git clone git@github.com:amittleider/vscode_python_bug_repro.git
pip install -e vscode_python_bug_repro

Next, open VScode and use the "Add folder to workspace" and select the folder ~/mysource/vscode_python_bug_repro/vscode_python_bug_repro_lib.

Next, set your workspace settings to the following json:

{
	"folders": [
		{
			"path": "/home/mitt/source/vscode_python_bug_repro/vscode_python_bug_repro_lib"
		}
	],
	"settings": {}
}

Set your user settings to the following json:

{
    "python.unitTest.nosetestsEnabled": true,
    "python.unitTest.autoTestDiscoverOnSaveEnabled": false,
    "editor.fontSize": 12,
    "window.zoomLevel": 0,
    "breadcrumbs.enabled": true,
    "workbench.editor.enablePreview": false,
    "editor.wordBasedSuggestions": false,
}

Next, use the VScode console to "Discover Unit Tests", like the gif below.

Next, hopefully you will see the bug as well. Here is a gif of the bug repro using the repository I made.

[DonJayamanne]

Sorry still unable to replicate this issue at my end.

[amittleider]

Is there any more information that I can give to help?

I have updated my version of the extension and the version of the VSCode today. Unfortunately the problem is worse -- Now I never see the Code Lens for Run Tests | Debug Tests, no matter what.

There is another bug open on the issue here: #2908 . The difference is that my tests have no types in them (although the code that runs inside of the tests are typed).

Below is a new gif. I begin by discovering unit tests, but no code lens shows up. Then I run the current unit test file, which succeeds. Then I debug the current unit test, which hits the breakpoint properly.

VSCode version: 1.29.0
VScode Python version: 2018.10.1
Ubuntu 18.04

[DonJayamanne]

Could you edit the file (add an empty line), then close and re-open the file.

[amittleider]

I tried to add some new lines, close, and re-open, but it didn't work. I also tried to disabled the C#, C++, and Docker extensions for my workspace (now I just have your Python extension and a VS keymap enabled for this workspace), and it looks like I'm back to the behavior that I originally posted on Oct 4 (Run Test | Debug Test code lens appears when you arrive on the file, but if you save, it disappears).

I had a debugging session today on the issue. It appears to me the problem is coming from testFiles.ts line 72.

const symbols = (await symbolProvider.provideDocumentSymbols(document, token)) as SymbolInformation[];

When I tab onto the file (the case where Run Tests | Debug Tests appears properly), the symbols variable is properly populated. When I save the file (the case where Run Tests | Debug Tests disappears), the symbols variable an empty array, so the getCodeLens function will never be called. I get a bit lost going into the symbolProvider code.