Add "Go to Next/Previous Uncovered Line" navigation for Test Coverage

[obrobrio2000]

Fixes #258967
Related to #258961

Description

Adds navigation buttons and keyboard shortcuts to jump between uncovered lines in the test coverage view.

Changes

• New Commands:

  • testing.coverage.goToNextMissedLine (Alt+F9)
  • testing.coverage.goToPreviousMissedLine (Shift+Alt+F9)

• UI Enhancements:

  • Added up/down arrow buttons to the Coverage Toolbar Widget
  • Added menu items in Editor Title when coverage is active
  • Commands available in Command Palette when coverage is open

• Navigation Behavior:

  • Jumps to next/previous line with zero test coverage
  • Wraps around at file boundaries for continuous navigation
  • Centers the target line in the editor for better visibility
  • Only enabled when coverage data is available for the current file

Implementation Details

The implementation follows VS Code's existing navigation patterns (similar to "Go to Next Error"):

• Navigation methods in CodeCoverageDecorations class iterate through decorations marked with CLASS_MISS
• Action2 classes provide command registration with keybindings and menu integration
• Toolbar buttons execute the commands via ICommandService

Testing

To test:

1. Open a file with test coverage
2. Use Alt+F9 to jump to next uncovered line
3. Use Shift+Alt+F9 to jump to previous uncovered line
4. Verify navigation wraps around at file boundaries
5. Check toolbar buttons appear and function correctly

[Copilot]

Pull Request Overview

This PR adds keyboard shortcuts and UI navigation buttons to jump between uncovered lines in VS Code's test coverage view, making it easier for developers to navigate through untested code sections.

• Adds two new commands for navigating to next/previous uncovered lines with Alt+F9 and Shift+Alt+F9 keybindings
• Implements navigation logic in the CodeCoverageDecorations class to find and jump to missed coverage lines
• Adds up/down arrow buttons to the coverage toolbar widget for UI-based navigation

Reviewed Changes

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

File	Description
src/vs/workbench/contrib/testing/common/constants.ts	Adds command IDs for the new navigation commands
src/vs/workbench/contrib/testing/browser/codeCoverageDecorations.ts	Implements navigation methods and registers Action2 commands with keybindings and menu items

[connor4312]

lgtm thanks!

[connor4312]

There are some compile errors:

Error: [define-class-fields-check] src/vs/workbench/contrib/testing/browser/codeCoverageDecorations.ts(268,10): error TS6133: 'isMissedLine' is declared but its value is never read.
Error: [define-class-fields-check] src/vs/workbench/contrib/testing/browser/codeCoverageDecorations.ts(1040,102): error TS2339: Property 'ID' does not exist on type 'typeof CodeCoverageDecorations'.
Error: [define-class-fields-check] src/vs/workbench/contrib/testing/browser/codeCoverageDecorations.ts(1076,102): error TS2339: Property 'ID' does not exist on type 'typeof CodeCoverageDecorations'.

[connor4312]

This is already available via the constants enum Testing.CoverageDecorationsContributionId

[connor4312]

Still some errors -- these should be shown in your vscode window if you have the eslint extension installed:

Warning: [eslint ] [21:59:56] /mnt/vss/_work/vscode/vscode/src/vs/workbench/contrib/testing/browser/codeCoverageDecorations.ts: line 1006, col 11, Warning - Duplicate key 'testing.goToNextMissedLine' with different message value. (local/code-no-unexternalized-strings)
Warning: [eslint ] /mnt/vss/_work/vscode/vscode/src/vs/workbench/contrib/testing/browser/codeCoverageDecorations.ts: line 1042, col 11, Warning - Duplicate key 'testing.goToPreviousMissedLine' with different message value. (local/code-no-unexternalized-strings)
[eslint ]
[e