[cupertino_ui] Re-enable tab_scaffold_test.dart

[Renzo-Olivares]

This test re-enables tab_scaffold_test.dart, and brings over widget_inspector_test_utils.dart into tests/.

Pre-Review Checklist

• I read the [Contributor Guide] and followed the process outlined there for submitting PRs.
• I read the [AI contribution guidelines] and understand my responsibilities, or I am not using AI tools.
• I read the [Tree Hygiene] page, which explains my responsibilities.
• I read and followed the [relevant style guides] and ran [the auto-formatter].
• I signed the [CLA].
• The title of the PR starts with the name of the package surrounded by square brackets, e.g. [shared_preferences]
• I [linked to at least one issue that this PR fixes] in the description above.
• I followed [the version and CHANGELOG instructions], using [semantic versioning] and the [repository CHANGELOG style], or I have commented below to indicate which documented exception this PR falls under[^1].
• I updated/added any relevant documentation (doc comments with ///).
• I added new tests to check the change I am making, or I have commented below to indicate which [test exemption] this PR falls under[^1].
• All existing and new tests are passing.

[gemini-code-assist]

Code Review

This pull request removes the skip annotation from tab_scaffold_test.dart, updates its imports, and introduces a new test utility file widget_inspector_test_utils.dart containing DispatchedEventKey and TestWidgetInspectorService. Feedback suggests removing an unused import in the new utility file and replacing it with package:flutter/widgets.dart. Additionally, it is recommended to use .toString() instead of a direct cast to String in testBoolExtension to handle boolean values safely.

[gemini-code-assist]

The import of package:cupertino_ui/cupertino_ui.dart is unused in this test utility file. To avoid unnecessary coupling and keep the test utilities clean, import package:flutter/widgets.dart instead, which provides WidgetInspectorService and WidgetsBinding.

Suggested change

	import 'package:cupertino_ui/cupertino_ui.dart';
	import 'package:flutter/widgets.dart';

References

1. Unused imports should be avoided to keep the codebase clean and maintainable, adhering to Dart's standard lint rules (unused_import). ^(link)

[justinmc]

Is it really unused?

[Renzo-Olivares]

No it's definitely used.

[gemini-code-assist]

The testBoolExtension method casts the 'enabled' value directly to String using as String. However, some service extensions return actual boolean values (e.g., true or false) rather than string representations. To make this utility more robust and prevent runtime TypeErrors, convert the value to a string using .toString().

  Future<String> testBoolExtension(String name, Map<String, String> arguments) async {
    expect(extensions, contains(name));
    // Encode and decode to JSON to match behavior using a real service
    // extension where only JSON is allowed.
    final Map<String, dynamic> result = json.decode(json.encode(await extensions[name]!(arguments))) as Map<String, dynamic>;
    return result['enabled']?.toString() ?? 'false';
  }

[justinmc]

Sounds reasonable, though I know you just copied this code, so it's fine either way.

[justinmc]

LGTM 👍

[justinmc]

Is it really unused?

[justinmc]

Sounds reasonable, though I know you just copied this code, so it's fine either way.