Stabilize Project Navigator UI tests

[jkaunert]

Summary

• Launch Project Navigator UI tests with isolated temporary workspaces that CodeEdit creates when needed.
• Harden Project Navigator row queries with explicit waits for row-count growth and named rows.
• Stabilize add-button discovery plus folder expansion/collapse assertions used by the Project Navigator UI tests.

Why

While preparing the Project Navigator UI-test stabilization work, release-readiness review found testCreateNewFiles could still race file creation by relying on a short selected-row/row lookup after choosing Add File. This hardens that path so creation waits for observable navigator growth, the expected titled row, and tab/editor evidence before continuing.

Validation

• DEVELOPER_DIR=/Applications/Xcode-26.6-RC2.app/Contents/Developer xcodebuild -version -> Xcode 26.6 (17F113)
• xcodebuild -project CodeEdit.xcodeproj -scheme CodeEdit -configuration Debug -derivedDataPath /tmp/apple-appdev-deriveddata/codeedit-baseline-ui-tests-pr-20260702-xcode26 -destination 'platform=macOS' -skipPackagePluginValidation build -> passed (** BUILD SUCCEEDED **)
• xcodebuild ... -only-testing:CodeEditUITests/ProjectNavigatorFileManagementUITests/testCreateNewFiles -only-testing:CodeEditUITests/ProjectNavigatorUITests/testNavigatorOpenFilesAndFolder test -> passed (** TEST SUCCEEDED **, 2 tests)
• xcodebuild ... -only-testing:CodeEditUITests/ProjectNavigatorFileManagementUITests test -> passed (** TEST SUCCEEDED **, 2 tests)
• xcodebuild ... -only-testing:CodeEditUITests/ProjectNavigatorUITests test -> passed (** TEST SUCCEEDED **, 1 test)
• git diff --check upstream/main...HEAD -> clean

Notes

The build/test runs still print SwiftLint package-plugin command-report noise after success, for example The following build commands failed: Running SwiftLint ..., while xcodebuild exits 0 and prints the final build/test success marker. I did not find a branch-attributable warning from these UI-test changes.

My active default Xcode is currently Xcode 27 beta; that toolchain fails unrelated base code in EditorTabsOverflowShadow.swift with ambiguous use of 'opacity'. I used Xcode 26.6 for this PR's freshness validation.

[Copilot]

Pull request overview

This PR focuses on stabilizing Project Navigator UI tests by improving how tests locate and wait for navigator elements, and by introducing a DEBUG-only app launch mode that opens an isolated temporary workspace created by CodeEdit.

Changes:

• Added more resilient UI-test queries and explicit wait helpers for navigator row discovery and row-count changes.
• Updated Project Navigator UI tests to wait for expected rows/row-count transitions instead of relying on short timing windows.
• Added a DEBUG-only launch argument path for CodeEdit to create/open an isolated temp workspace for UI tests.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
CodeEditUITests/Query.swift	Adds add-button lookup, row query helpers, and polling-based wait utilities used by UI tests.
CodeEditUITests/ProjectPath.swift	Adds helper to generate a temp workspace identifier for app-created workspaces.
CodeEditUITests/Features/NavigatorArea/ProjectNavigator/ProjectNavigatorUITests.swift	Hardens folder open/close assertions using explicit waits and row-count checks.
CodeEditUITests/Features/NavigatorArea/ProjectNavigator/ProjectNavigatorFileManagementUITests.swift	Stabilizes “Add File” flow by waiting for navigator growth, expected row, and editor/tab evidence.
CodeEditUITests/App.swift	Adds launchWithAppWritableTempDir() to launch CodeEdit in a workspace created by the app.
CodeEdit/Features/NavigatorArea/ProjectNavigator/ProjectNavigatorToolbarBottom.swift	Makes the “Add” control more reliably discoverable by UI tests via an explicit label and sizing.
CodeEdit/AppDelegate.swift	Adds DEBUG-only support for --codeedit-uitest-open-temp-workspace and consolidates workspace opening logic.

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[Copilot]

Pull request overview

Copilot reviewed 7 out of 7 changed files in this pull request and generated 2 comments.