[Null-aware elements] Analysis Server Implementation

[chloestefantsova]

This issue tracks all the analysis server work items for the wildcard variables feature. Referenced from: https://github.com/dart-lang/sdk/blob/main/pkg/analysis_server/doc/process/new_language_feature.md

• Call Hierarchy
  • Tests needed.
    • No crashes.
    • Verify that the invocations inside of the null-aware collection elements are handled.
    • Done: https://dart-review.googlesource.com/c/sdk/+/393321
    • Updated test cases in files:
      • pkg/analysis_server/test/lsp/call_hierarchy_test.dart
      • pkg/analysis_server/test/src/computer/call_hierarchy_computer_test.dart
• Closing Labels
  • Test needed.
    • No crashes.
    • Done: https://dart-review.googlesource.com/c/sdk/+/396600
    • Updated test cases in files:
      • pkg/analysis_server/test/src/computer/closing_labels_computer_test.dart
• Code Completion
  • Tests needed.
    • Add different use cases for the different locations of the null-aware elements.
  • Implementation needed
    • We almost certainly will need to add an implementation for the new node.
  • Done: https://dart-review.googlesource.com/c/sdk/+/392902
  • Updated implementation in files:
    • pkg/analysis_server/lib/src/services/completion/dart/in_scope_completion_pass.dart
  • Updated test cases in files:
    • pkg/analysis_server/test/services/completion/dart/location/null_aware_element_test.dart
    • pkg/analysis_server/test/services/completion/dart/location/test_all.dart (to include null_aware_element_test.dart)
• Code Folding
  • Tests needed.
    • No crashes.
    • Check that closures inside the expressions, inside of the null-aware elements, are properly folded. It has to be multiline.
    • Done: https://dart-review.googlesource.com/c/sdk/+/396860
    • Updated test cases in files:
      • pkg/analysis_server/test/src/computer/folding_computer_test.dart
• Document Symbols
  • Needs clarification.
• Document Colors
  • Tests needed.
    • Test color swatches and see if the result indicates the correct colour. Pick an existing test and wrap it into a null-aware element.
    • Done: https://dart-review.googlesource.com/c/sdk/+/397902, https://dart-review.googlesource.com/c/sdk/+/397904.
    • Updated test cases in files:
      • pkg/analysis_server/test/src/computer/color_computer_test.dart
• Hovers
  • Tests needed.
    • Write a test that ensures that an identifier inside of a null-aware element has a hover for it.
    • Done: https://dart-review.googlesource.com/c/sdk/+/398061
    • Updated test cases in files:
      • pkg/analysis_server/test/analysis/get_hover_test.dart
• Implemented/Override Markers
  • Not affected.
• Inlay Hints
  • Tests needed.
    • Write a test that shows that the inlay hints are shown inside of a closure inside of a null-aware element.
      • Done: https://dart-review.googlesource.com/c/sdk/+/398860
      • Updated test cases in files:
        • pkg/analysis_server/test/lsp/inlay_hint_test.dart
• Navigation - legacy
  • Tests needed.
    • Done: https://dart-review.googlesource.com/c/sdk/+/398880, https://dart-review.googlesource.com/c/sdk/+/398882
    • Updated test cases in files:
      • pkg/analysis_server/test/analysis/get_navigation_test.dart
      • pkg/analysis_server/test/analysis/notification_navigation_test.dart
• Navigation - LSP Go to Definition
  • Test needed.
    • No crashes.
    • Add an identifier inside of a null-aware element and check that the navigation works.
    • Done: https://dart-review.googlesource.com/c/sdk/+/399080
    • Updated test cases in files:
      • pkg/analysis_server/test/lsp/definition_test.dart
      • pkg/analysis_server/test/lsp/super_test.dart
• Navigation - LSP Go to Type Definition
  • Test needed
    • No crashes.
    • Done: https://dart-review.googlesource.com/c/sdk/+/399080
    • Updated test cases in files:
      • pkg/analysis_server/test/lsp/definition_test.dart
      • pkg/analysis_server/test/lsp/super_test.dart
• Navigation - Go to Super
  • Test needed
    • No crashes.
    • Done: https://dart-review.googlesource.com/c/sdk/+/399080
    • Updated test cases in files:
      • pkg/analysis_server/test/lsp/definition_test.dart
      • pkg/analysis_server/test/lsp/super_test.dart
• Occurrences - legacy
  • Tests needed.
    • No crashes.
    • Make sure that something inside of the null-aware element is highlighted when needed. Test both ways: when the clicked word is outside, and when it’s inside.
    • Done: https://dart-review.googlesource.com/c/sdk/+/411243
    • Updated test cases in files:
      • pkg/analysis_server/test/integration/analysis/occurrences_test.dart
• Occurrences - LSP Document Highlights
  • Tests needed.
    • No crashes.
    • Make sure that something inside of the null-aware element is highlighted when needed. Test both ways: when the clicked word is outside, and when it’s inside.
• Organize Imports
  • Not affected.
• Outline
  • Not affected.
• Flutter Outline
  • Tests needed.
    • No crashes.
    • Test for the case of a null-aware element in a collection in the widget tree.
    • Done: https://dart-review.googlesource.com/c/sdk/+/411020
    • Updated test cases in files:
      • pkg/analysis_server/test/src/flutter/flutter_outline_computer_test.dart
• Refactorings
  • Refactorings - legacy
  • Refactorings - rename refactoring
  • Refactorings - self describing
  • Quick Assists
  • Quick Fixes
  • Evaluate how likely it is for a refactoring to be affected, and write the corresponding tests,
  • Add reasonable fixes for the existing diagnostics.
  • Added tests:
    • add_trailing_comma
      • https://dart-review.googlesource.com/c/sdk/+/405380
      • pkg/analysis_server/test/src/services/correction/fix/add_trailing_comma_test.dart
• Search
  • Search - Find References
  • Search - Implementations - LSP
  • Search - Member Declarations
  • Search - Member References
  • Search - Top-level Declarations
  • Tests needed.
    • Test searching for local variables.
• Selection Range
  • Tests needed.
    • Test that the boundaries of the null-aware elements can be crossed during expansion.
• Syntax Highlighting
  • Semantic Highlights
  • LSP Semantic Tokens
  • Not affected.
• Signature Help
  • Not affected.
• Snippets
  • Not affected.
• Sort Members
  • Not affected.
• Type Hierarchy - legacy
  • Not affected.
• Type Hierarchy - LSP
  • Not affected.
• Workspace Symbols
  • Tests needed.
    • Add tests for local variables.