test(e2e): fix outline tree expansion, method validation, and virtualization handling W-21714868

[kylewalke]

What does this PR do?

Fixes e2e outline tests that logged method validation failures (11/12 missing) but silently passed because only classFound was asserted.

Root causes fixed:

• ensureOutlineTreeFullyVisible used wrong CSS selectors (.codicon-chevron-right) and double-click expansion (navigates editor, doesn't expand tree). Replaced with keyboard-driven ArrowRight/ArrowDown walk.
• validateApexSymbolsInOutline used page-wide text= selectors that false-matched editor content instead of outline rows. Scoped all selectors to .outline-tree/.tree-explorer.
• collectAllTreeLabels broke early on duplicate labels (two constructors both named ApexClassExample). Now uses element id for end-detection.
• textContent() on parent container pulled <style> CSS into debug output. Now queries individual row elements.
• DOM row count-based termination failed with Monaco's virtualised list (viewport-sized count stays constant). Now tracks focused row identity.
• Sticky pane header intercepted clicks on partially-hidden rows. Fixed with force: true on list container.

Assertion strengthened:

• Added expect(symbolValidation.allExpectedMethodsFound).toBe(true) — missing methods now fail the test.

What issues does this PR fix or reference?

@W-21714868@

Results

• Outline: 12/12 methods validated in both chromium-web and desktop-electron
• Full suite: 85/85 passing in CI

[github-actions]

E2E Test Results Summary

Run: 220

Test Results

• Passed: 85
• Failed: 0
• Errors: 0
• Total: 85

Passing Rate by File

• apex-hover.spec.ts/junit.xml: 100.0% (21/21 passed)
• apex-lsp-integration.spec.ts/junit.xml: 100.0% (16/16 passed)
• apex-goto-definition.spec.ts/junit.xml: 100.0% (29/29 passed)
• apex-outline.spec.ts/junit.xml: 100.0% (11/11 passed)
• apex-extension-core.spec.ts/junit.xml: 100.0% (8/8 passed)

Artifacts

View detailed test reports in the Artifacts section.

All tests passed

[github-actions]

E2E Test Results Summary

Run: 264

Test Results

• Passed: 85
• Failed: 0
• Errors: 0
• Total: 85

Passing Rate by File

• apex-hover.spec.ts/junit.xml: 100.0% (21/21 passed)
• apex-lsp-integration.spec.ts/junit.xml: 100.0% (16/16 passed)
• apex-goto-definition.spec.ts/junit.xml: 100.0% (29/29 passed)
• apex-outline.spec.ts/junit.xml: 100.0% (11/11 passed)
• apex-extension-core.spec.ts/junit.xml: 100.0% (8/8 passed)

Artifacts

View detailed test reports in the Artifacts section.

All tests passed

[github-actions]

E2E Test Results Summary

Run: 267

Test Results

• Passed: 85
• Failed: 0
• Errors: 0
• Total: 85

Passing Rate by File

• apex-hover.spec.ts/junit.xml: 100.0% (21/21 passed)
• apex-lsp-integration.spec.ts/junit.xml: 100.0% (16/16 passed)
• apex-goto-definition.spec.ts/junit.xml: 100.0% (29/29 passed)
• apex-outline.spec.ts/junit.xml: 100.0% (11/11 passed)
• apex-extension-core.spec.ts/junit.xml: 100.0% (8/8 passed)

Artifacts

View detailed test reports in the Artifacts section.

All tests passed

[github-actions]

E2E Test Results Summary

Run: 281

Test Results

• Passed: 85
• Failed: 0
• Errors: 0
• Total: 85

Passing Rate by File

• apex-hover.spec.ts/junit.xml: 100.0% (21/21 passed)
• apex-lsp-integration.spec.ts/junit.xml: 100.0% (16/16 passed)
• apex-goto-definition.spec.ts/junit.xml: 100.0% (29/29 passed)
• apex-outline.spec.ts/junit.xml: 100.0% (11/11 passed)
• apex-extension-core.spec.ts/junit.xml: 100.0% (8/8 passed)

Artifacts

View detailed test reports in the Artifacts section.

All tests passed