Broken playwright test on Windows using TheiaTextEditor

[Hanksha]

Bug Description:

Since the changes in #14764 our tests using the TheiaTextEditor are failing on Windows at await editor.waitForVisible().
I investigated it and the expected viewSelector and tabSelector are different from the actual.

Actual in Browser:
code-editor-opener:file:///c%3A/Users/Vivien/martini-designer-e2e-tests/.gitignore:1
Expected by TheiaTextEditor:
code-editor-opener:file://c%3A/Users/Vivien/martini-designer-e2e-tests/.gitignore:1

It looks like the path returned by TheiaWorkspace.escapedPath (which calls TheiaWorkspace.path) lost a leading / for Windows which causes TheiaTextEditor to generate incorrect selectors.

Steps to Reproduce:

1. Run a playwright test that open a file.
2. Create TheiaTextEditor pointing to the opened file.
3. use await editor.waitForVisible()
4. This will timeout.

Additional Information

• Operating System:
• Theia Version: 1.60.0

[msujew]

Interesting file://c%3A/Users/Vivien/martini-designer-e2e-tests/.gitignore was never a valid file URI in the first place, as it uses c: as the authority (which isn't correct). It should either be file:///c%3A/... (empty authority) or file:/c%3A (no authority).

[Hanksha]

@msujew Yes "file:///c%3A/... (empty authority)" is the selector that was used before and what I see in the browser. As of Theia 1.60 the selector used by TheiaTextEditor is "file://c%3A/..."

[JonasHelming]

@planger FYI