[code_builder] Expand code coverage

[kevmoo]

1. TypeReference (100.0% Coverage) in test/specs/type_reference_test.dart:
   • Added test for generic bounds formatting (e.g., T extends num).
   • Added robust tests for newInstance, newInstanceNamed, constInstance, and constInstanceNamed constructor calls.
   • Added tests ensuring that AST property bindings (url, symbol, and type) are correctly exposed.
2. RecordType (100.0% Coverage) in test/specs/record_type_test.dart:
   • Added API contract tests to verify that calling instantiation methods (newInstance, newInstanceNamed, constInstance, constInstanceNamed) correctly throws UnsupportedError as record types cannot be directly instantiated as objects.
   • Ensured standard properties (url and symbol returning null, type returning self) are fully asserted.
3. FunctionType (100.0% Coverage) in test/specs/function_type_test.dart (New File):
   • Created a dedicated test suite validating all properties and instantiation restrictions.
   • Added targeted verification of the toTypeDef AST conversion utility, ensuring it generates perfect typedef structures (e.g., typedef MyFunc = String Function(int);).

---

File	Original Coverage	New Coverage	Hit Lines / Total Lines
lib/src/specs/type_reference.dart	29.4%	100.0% 🚀	17 / 17
lib/src/specs/type_record.dart	26.7%	100.0% 🚀	15 / 15
lib/src/specs/type_function.dart	37.5%	100.0% 🚀	16 / 16

[github-actions]

Package publishing

Package	Version	Status	Publish tag (post-merge)
package:bazel_worker	1.1.5	already published at pub.dev
package:benchmark_harness	2.4.0	already published at pub.dev
package:boolean_selector	2.1.2	already published at pub.dev
package:browser_launcher	1.2.0-wip	WIP (no publish necessary)
package:cli_config	0.2.1-wip	WIP (no publish necessary)
package:cli_util	0.5.1	already published at pub.dev
package:clock	1.1.3-wip	WIP (no publish necessary)
package:code_builder	4.12.0-wip	WIP (no publish necessary)
package:coverage	1.15.0	already published at pub.dev
package:csslib	1.0.2	already published at pub.dev
package:extension_discovery	2.1.0	already published at pub.dev
package:file	7.0.2-wip	WIP (no publish necessary)
package:file_testing	3.1.0-wip	WIP (no publish necessary)
package:glob	2.1.3	already published at pub.dev
package:graphs	2.4.0-wip	WIP (no publish necessary)
package:html	0.15.7-wip	WIP (no publish necessary)
package:io	1.1.0-wip	WIP (no publish necessary)
package:json_rpc_2	4.1.0	already published at pub.dev
package:markdown	7.4.0	ready to publish	markdown-v7.4.0
package:mime	2.1.0-wip	WIP (no publish necessary)
package:oauth2	2.0.5	already published at pub.dev
package:package_config	2.3.0-wip	WIP (no publish necessary)
package:pool	1.5.3-wip	WIP (no publish necessary)
package:process	5.0.5	(error) pubspec version (5.0.5) and changelog (5.0.6-wip) don't agree
package:pub_semver	2.2.0	already published at pub.dev
package:pubspec_parse	1.6.0-wip	WIP (no publish necessary)
package:source_map_stack_trace	2.1.3-wip	WIP (no publish necessary)
package:source_maps	0.10.14-wip	WIP (no publish necessary)
package:source_span	1.10.2	already published at pub.dev
package:sse	4.2.0	already published at pub.dev
package:stack_trace	1.12.2-wip	(error) pubspec version (1.12.2-wip) and changelog (1.12.2-dev) don't agree
package:stream_channel	2.1.4	already published at pub.dev
package:stream_transform	2.1.2-wip	WIP (no publish necessary)
package:string_scanner	1.4.2-wip	WIP (no publish necessary)
package:term_glyph	1.2.3-wip	WIP (no publish necessary)
package:test_reflective_loader	0.6.0	ready to publish	test_reflective_loader-v0.6.0
package:timing	1.0.2	already published at pub.dev
package:unified_analytics	8.0.15	ready to publish	unified_analytics-v8.0.15
package:watcher	1.2.2-wip	WIP (no publish necessary)
package:yaml	3.1.4-wip	WIP (no publish necessary)
package:yaml_edit	2.2.4	already published at pub.dev

Documentation at https://github.com/dart-lang/ecosystem/wiki/Publishing-automation.

[github-actions]

PR Health

License Headers ✔️

// Copyright (c) 2026, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

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Files
pkgs/bazel_worker/benchmark/benchmark.dart
pkgs/coverage/lib/src/coverage_options.dart
pkgs/html/example/main.dart
pkgs/pubspec_parse/test/git_uri_test.dart
pkgs/watcher/test/custom_watcher_factory_test.dart

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Breaking changes ✔️

Package	Change	Current Version	New Version	Needed Version	Looking good?
code_builder	None	4.11.1	4.12.0-wip	4.12.0-wip	✔️

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Coverage ✔️

File	Coverage

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API leaks ✔️

The following packages contain symbols visible in the public API, but not exported by the library. Export these symbols or remove them from your publicly visible API.

Package	Leaked API symbol	Leaking sources

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Unused Dependencies ✔️

Package	Status
code_builder	✔️ All dependencies utilized correctly.

For details on how to fix these, see dependency_validator.

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Changelog Entry ✔️

Package	Changed Files

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[gemini-code-assist]

Code Review

This pull request introduces comprehensive unit tests for FunctionType, RecordType, and TypeReference to verify their API contracts and code generation capabilities. The feedback suggests using .add() instead of .addAll() for single elements to be more idiomatic, refactoring redundant variable declarations in tests to improve maintainability, and expanding test coverage to include typeArguments while utilizing raw strings for better readability in expectations.