Update Contribution.md

[kyklish]

Branch A has unit test A, Branch B has unit test B

When developer checkout from Branch A to Branch B old test files A are present in out folder and they may produce errors, when launch extension's test via Debug (Ctrl + Shift + D) -> Test Extension -> F5.

Solution: npm run pretest after each branch switching.

Add pretest to launch.json too expensive, we need quick test, not full recompile each time.

Maybe we need add some info about this to Contibution.md, for such newbie developers like me :) ? I can't write it in clean way, I'm terrible in this. Can you @mark-wiemer ?

Why tsc in watch mode don't detect missing files and not delete corresponding js files?

[mark-wiemer]

See #236 :)

[kyklish]

Today another problem arrive :( Microsoft stops support VS Code for Windows 7. Last working version is 1.70.3. Now test suite downloads 1.71.0 and fails to run tests.

Solution: explicitly pass VS Code executable path to runTests() in .\src\test\runTest.ts

runTests({
    vscodeExecutablePath: './.vscode-test/vscode-win32-archive-1.70.3/Code.exe',
    ...

Can we somehow workaround this problem (do not mess with modified file in Git)?

[mark-wiemer]

I really don't recommend using Windows 7. It's not secure at this point and hasn't been for a while.

I'll add documentation about this but it'll be surrounded by warnings "please don't use Windows 7, this extension only supports supported versions of Windows."