feat(flutter_tools): introduce Test and Drive specification objects - #194017

)

Updates `dart-use-pattern-matching` (`SKILL.md` and
`resources/dart_skills.yaml`) to recommend object and record pattern
destructuring when unpacking multiple fields, eliminating a single-use
intermediate variable, or promoting nullable fields (`:field!`), while
preserving standard property access (`user.name`) for single properties
and mutable/outer-scoped bindings. Verified with `dart format`, `dart
analyze --fatal-infos`, and `skills_lint`.

### Why

- Subsection 5
([`skills/dart-use-pattern-matching/SKILL.md:140-142`](https://github.com/dart-lang/skills/blob/0d9f1c4/skills/dart-use-pattern-matching/SKILL.md#L140-L142))
previously only discouraged single-property object destructuring (`final
User(:name) = user;`), without guiding agents to use object
destructuring (`final Spec(:Type field1, :Type field2!) = spec;`) or
`MapEntry(:key, :value)` loops in place of repetitive single-field
`final` assignments (motivated by
flutter/flutter#194017 (comment)).
- Adds guardrails against destructuring when a long class name with
renamed getters wraps a 2-field extraction across 3+ lines or when a
target variable is mutable (`var`) or assigned to an outer scope.

Roll Flutter from 4249ccbc18a3 to 426be968b5eb (44 revisions)

flutter/flutter@4249ccb...426be96

2026-10-14 [email protected] Allow color delta tolerance in in-memory fuzzy image comparator (flutter/flutter#193937)
2026-10-14 [email protected] [web] Drop stale composing range after text is replaced mid-composition (flutter/flutter#194096)
2026-10-14 [email protected] Roll Skia from 2a2bbea66844 to acde3755d2e2 (1 revision) (flutter/flutter#194376)
2026-10-14 [email protected] Roll Skia from 128c983b12de to 2a2bbea66844 (1 revision) (flutter/flutter#194371)
2026-10-14 [email protected] Roll Skia from 48a294ed4955 to 128c983b12de (3 revisions) (flutter/flutter#194353)
2026-10-14 [email protected] feat(flutter_tools): extract WebDebugConfig from DebuggingOptions (flutter/flutter#194312)
2026-10-14 [email protected] Roll Skia from ea6781c5b6d1 to 48a294ed4955 (2 revisions) (flutter/flutter#194349)
2026-10-14 [email protected] Include <vector> in Android proc_table.h. (flutter/flutter#194325)
2026-10-14 [email protected] Roll Dart SDK from 5933cb486b4a to 6b50116630d0 (28 revisions) (flutter/flutter#194341)
2026-10-14 [email protected] Move GLES3 instancing API entry points to FOR_EACH_IMPELLER_GLES3_PROC (flutter/flutter#194319)
2026-10-14 [email protected] feat(flutter_tools): extract AndroidGradleConfig and move toGradleConfig to AndroidBuildInfo (flutter/flutter#194016)
2026-10-14 [email protected] Roll Skia from ae297bec6012 to ea6781c5b6d1 (8 revisions) (flutter/flutter#194331)
2026-10-14 [email protected] [flutter_tools] Migrate gradle_errors and deferred_components_prebuild_validator away from globals (flutter/flutter#193649)
2026-10-14 [email protected] [Impeller] Cache GLES sampler configuration in RenderPassStateCache (flutter/flutter#193922)
2026-10-14 [email protected] Roll pub packages (flutter/flutter#194332)
2026-10-13 [email protected] [tool] Migrate RunCommand to modular dependency injection (flutter/flutter#190791)
2026-10-13 [email protected] Include `engine/src/flutter/.ci.yaml` in quarterly `goldctl` checklist (flutter/flutter#194316)
2026-10-13 [email protected] [flutter_tools] Remove the last AMD module system support (flutter/flutter#193607)
2026-10-13 [email protected] Roll Skia from 8b3394a60654 to ae297bec6012 (5 revisions) (flutter/flutter#194310)
2026-10-13 [email protected] [web] Remove the a11y placeholder only after the gesture ends (flutter/flutter#194109)
2026-10-13 [email protected] Upgrade goldctl to the latest version (flutter/flutter#193932)
2026-10-13 [email protected] [flutter_tools] Lazily initialize AndroidStudio validation and optimize candidate selection (flutter/flutter#191968)
2026-10-13 [email protected] [flutter_tools] Clean up outdated widget preview TODOs and refactor static state (flutter/flutter#189437)
2026-10-13 [email protected] Roll Skia from e5b5db6d0d6f to 8b3394a60654 (2 revisions) (flutter/flutter#194306)
2026-10-13 [email protected] Redistribute TESTOWNERS for Android team (flutter/flutter#193861)
2026-10-13 [email protected] feat(flutter_tools): introduce Test and Drive specification objects (flutter/flutter#194017)
2026-10-13 [email protected] [Impeller] Keep the aspect ratio when shrinking images to the max texture size (flutter/flutter#194010)
2026-10-13 [email protected] [flutter tool] preserve inherited `DASH__SUPPRESS_ANALYTICS=true` for sub-tools (flutter/flutter#194261)
2026-10-13 [email protected] Roll Packages from d8d9e97 to a1ed23c (9 revisions) (flutter/flutter#194302)
2026-10-13 [email protected] Use PE/COFF AOT snapshots for Windows x64 (flutter/flutter#187594)
2026-10-13 [email protected] Fix Expansible crash when PageStorage holds a non-bool value (flutter/flutter#192195)
2026-10-13 [email protected] Roll Skia from ffeccb3ca58a to e5b5db6d0d6f (1 revision) (flutter/flutter#194297)
2026-10-13 [email protected] Explain why initState() is too early to depend on an inherited widget (flutter/flutter#192727)
2026-10-13 [email protected] Refactor TestPlatformDispatcher (flutter/flutter#192747)
2026-10-13 [email protected] Roll Skia from 3de0984208ec to ffeccb3ca58a (2 revisions) (flutter/flutter#194291)
2026-10-13 [email protected] Roll Skia from 0580c2b780f6 to 3de0984208ec (2 revisions) (flutter/flutter#194281)
2026-10-13 [email protected] Roll Skia from f641d55e07a8 to 0580c2b780f6 (3 revisions) (flutter/flutter#194275)
2026-10-13 [email protected] Roll Skia from 0e5d8d1be81b to f641d55e07a8 (1 revision) (flutter/flutter#194266)
2026-10-13 [email protected] Scaffold view metrics overrides (flutter/flutter#192764)
2026-10-13 [email protected] [web] Add SemanticsRole.listBox and SemanticsRole.option (flutter/flutter#192971)
2026-10-13 [email protected] Pin mac_unopt to macOS 15 (flutter/flutter#194254)
2026-10-13 [email protected] Roll pub packages (flutter/flutter#194257)
2026-10-12 [email protected] Roll Skia from 17f6986c226c to 0e5d8d1be81b (4 revisions) (flutter/flutter#194249)
2026-10-12 [email protected] Make DisplayLists' use of DlPaint, SkPaint, and impeller::Paint agree on the default isAntiAlias (flutter/flutter#193939)

If this roll has caused a breakage, revert this CL and set the roller
...

…lutter#194017)

### Rationale

`FlutterTestRunner.runTests` accepted 33 loose parameters (duplicating
23 of them on `runTestsBySpawningLightweightEngines` alongside
duplicated `package:test` CLI argument lists), and
`DriverService.startTest` accepted 12 loose parameters fed by untyped
`boolArg` / `stringArg` / regex splitting in `TestCommand` and
`DriveCommand`. Following flutter#191018, flutter#191510, flutter#191760, flutter#192307, flutter#192455,
flutter#192524, flutter#192818, and flutter#193323, this change introduces immutable
service-layer specification objects and migrates `TestCommand` and
`DriveCommand` to typed `OptionDescriptor`s.

### Summary of Changes

- Introduce `@immutable class TestFilterSpecification` and `@immutable
class TestExecutionSpecification` (with `toPackageTestArgs()`) in
`test/runner.dart`, shrinking `FlutterTestRunner.runTests` from 33
parameters to 3 (`testWrapper`, `testFiles`, `spec`) and
`runTestsBySpawningLightweightEngines` from 25 parameters to 2
(`testFiles`, `spec`).
- Migrate `TestCommand` (`commands/test.dart`) from inline `argParser`
registrations and untyped `boolArg`/`stringArg`/`stringsArg` queries to
private typed `OptionDescriptor` constants (`argParser.addDescriptors` +
`getValue` / `wasParsed`), and update `bin/fuchsia_tester.dart`.
- Introduce `@immutable class DriveTestSpecification` (with
`parseBrowserDimension`) in `drive/drive_service.dart`, shrinking
`DriverService.startTest` (and `FlutterDriverService` /
`WebDriverService`) from 12 parameters to 2 (`testFile`, `spec`).
- Migrate `DriveCommand` (`commands/drive.dart`) from inline
registrations and ad-hoc string/int/enum parsing to private typed
`OptionDescriptor` constants (`IntOptionDescriptor`,
`DefaultedEnumOptionDescriptor<Browser>`, etc.) and
`DriveTestSpecification`.
- Update unit tests across `test_test.dart`, `drive_test.dart`,
`drive_service_test.dart`, and `web_driver_service_test.dart`.

### Flow / Surface Delta

```mermaid
flowchart LR
    A["TestCommand (OptionDescriptors)"] --> B["TestExecutionSpecification"]
    B --> C["FlutterTestRunner.runTests(spec)"]
    D["DriveCommand (OptionDescriptors)"] --> E["DriveTestSpecification"]
    E --> F["DriverService.startTest(spec)"]
```

### Verification

- Executed `dart analyze --fatal-infos` on `packages/flutter_tools` with
0 issues.
- Executed `dart test` across `test_test.dart`, `drive_test.dart`,
`drive_service_test.dart`, and `web_driver_service_test.dart` (`148/148`
passing).

## Pre-launch Checklist

- [x] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [x] I read the [Tree Hygiene] wiki page, which explains my
responsibilities.
- [x] I read and followed the [Flutter Style Guide], including [Features
we expect every widget to implement].
- [x] I signed the [CLA].
- [ ] I listed at least one issue that this PR fixes in the description
above.
- [x] I updated/added relevant documentation (doc comments with `///`).
- [x] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [x] I followed the [breaking change policy] and added [Data Driven
Fixes] where supported.
- [x] All existing and new tests are passing.