Run tests for package:rfw on stable as well.

For non-master-channel builds, the run_tests.sh script runs but
doesn't bother checking the actual coverage, since I expect Dart's
coverage logic to diverge in master and so we'd have to have
per-channel covered line counts, and that way lies madness.

No version change: Only affects how tests are run, not a public-facing change.
No CHANGELOG change: Only affects how tests are run, not a public-facing change.

.cirrus.yml

@@ -78,16 +78,8 @@ task:
           CHANNEL: "master"
           CHANNEL: "stable"
       script:
-        # Exclude:
-        # - flutter_image; its tests need a test server, so are run via
-        #   local_tests.sh.
-        # - rfw on stable; it includes golden tests whose results differ
-        #   between branch
-        - if [[ "$CHANNEL" == "master" ]]; then
-        -   ./script/tool_runner.sh test --exclude=flutter_image
-        - else
-        -   ./script/tool_runner.sh test --exclude=flutter_image,rfw
-        - fi
+        # We exclude flutter_image because its tests need a test server, so are run via local_tests.sh.
+        - ./script/tool_runner.sh test --exclude=flutter_image
       depends_on:
         - format+analyze
     - name: android-build+platform-tests
@@ -98,18 +90,8 @@ task:
       script:
         # extension_google_sign_in_as_googleapis_auth is currently not building, see
         # https://github.com/flutter/flutter/issues/89301
-        # rfw is excluded until the next Flutter stable release because it depends
-        # on features that have never shipped to stable. (The rfw package has
-        # never worked on stable so this is not going to break anyone.)
-        # When updating this, also look at the ios tests below.
-        # When updating this, also update the `rfw/run_tests.sh` file.
-        - if [[ "$CHANNEL" == "master" ]]; then
-        -   ./script/tool_runner.sh build-examples --apk --exclude=extension_google_sign_in_as_googleapis_auth
-        -   ./script/tool_runner.sh native-test --android --no-integration
-        - else
-        -   ./script/tool_runner.sh build-examples --apk --exclude=extension_google_sign_in_as_googleapis_auth,rfw
-        -   ./script/tool_runner.sh native-test --android --no-integration --exclude=rfw
-        - fi
+        - ./script/tool_runner.sh build-examples --apk --exclude=extension_google_sign_in_as_googleapis_auth
+        - ./script/tool_runner.sh native-test --android --no-integration
       depends_on:
         - format+analyze
     - name: web_benchmarks_test
@@ -140,16 +122,7 @@ task:
       CHANNEL: "stable"
   << : *FLUTTER_UPGRADE_TEMPLATE
   build_script:
-    # Exclude rfw until the next Flutter stable release because it depends
-    # on features that have never shipped to stable. (The rfw package has
-    # never worked on stable so this is not going to break anyone.)
-    # When updating this, also look at the android tests above.
-    # When updating this, also update the `rfw/run_tests.sh` file.
-    - if [[ "$CHANNEL" == "master" ]]; then
-    -   ./script/tool_runner.sh build-examples --ios
-    - else
-    -   ./script/tool_runner.sh build-examples --ios --exclude=rfw
-    - fi
+    - ./script/tool_runner.sh build-examples --ios
 
 task:
   name: local_tests

packages/rfw/README.md

@@ -266,3 +266,7 @@ When contributing code, ensure that `flutter test --coverage; lcov
 update `test_coverage/bin/test_coverage.dart` with the appropriate
 expectations to prevent future coverage regressions. (That program is
 run by `run_tests.sh`.)
+
+Golden tests are only run against the Flutter master channel and only
+run on Linux, since minor rendering differences are expected on
+different platforms and on different versions of Flutter.

packages/rfw/test/argument_decoders_test.dart

@@ -4,11 +4,18 @@
 
 // This file is hand-formatted.
 
+import 'dart:io' show Platform;
+
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:rfw/formats.dart' show parseLibraryFile;
 import 'package:rfw/rfw.dart';
 
+// See Contributing section of README.md file.
+final bool runGoldens = Platform.isLinux &&
+    (!Platform.environment.containsKey('CHANNEL') ||
+        Platform.environment['CHANNEL'] == 'master');
+
 void main() {
   testWidgets('String example', (WidgetTester tester) async {
     Duration? duration;
@@ -494,5 +501,5 @@ void main() {
       find.byType(RemoteWidget),
       matchesGoldenFile('goldens/argument_decoders_test.gridview.custom.png'),
     );
-  });
+  }, skip: !runGoldens);
 }

packages/rfw/test/material_widgets_test.dart

@@ -2,11 +2,18 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'dart:io' show Platform;
+
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:rfw/formats.dart' show parseLibraryFile;
 import 'package:rfw/rfw.dart';
 
+// See Contributing section of README.md file.
+final bool runGoldens = Platform.isLinux &&
+    (!Platform.environment.containsKey('CHANNEL') ||
+        Platform.environment['CHANNEL'] == 'master');
+
 void main() {
   testWidgets('Material widgets', (WidgetTester tester) async {
     final Runtime runtime = Runtime()
@@ -140,5 +147,5 @@ void main() {
       find.byType(RemoteWidget),
       matchesGoldenFile('goldens/material_test.drawer.png'),
     );
-  });
+  }, skip: !runGoldens);
 }

packages/rfw/test_coverage/bin/test_coverage.dart

@@ -15,39 +15,32 @@ const String lastUpdate = '2021-08-30';
 Future<void> main(List<String> arguments) async {
   // This script is mentioned in the README.md file.
 
-  if (Platform.environment['CHANNEL'] == 'stable') {
-    // For now these are disabled because this package has never been supported
-    // on the stable channel and requires newer language features that have not
-    // yet shipped to a stable build. It will be possible to test this with the
-    // first stable to ship after October 2021.
-    print(
-      'Skipping tests on stable channel.\n'
-      'These tests can be unskipped once we ship a stable after October 2021.',
-    );
-    exit(0);
-  }
-
   final Directory coverageDirectory = Directory('coverage');
 
   if (coverageDirectory.existsSync()) {
     coverageDirectory.deleteSync(recursive: true);
   }
 
-  // We run with --update-goldens because the goal here is not to verify the tests
-  // pass but to verify the coverage, and the goldens are not always going to pass
-  // when run on different platforms (e.g. on Cirrus we run this on a mac but the
-  // goldens expect a linux box).
   final ProcessResult result = Process.runSync(
     'flutter',
-    <String>['test', '--coverage', '--update-goldens'],
+    <String>['test', '--coverage'],
   );
   if (result.exitCode != 0) {
     print(result.stdout);
     print(result.stderr);
     print('Tests failed.');
+    // leave coverage directory around to aid debugging
     exit(1);
   }
 
+  if (Platform.environment['CHANNEL'] != 'master') {
+    print(
+      'Tests passed. (Coverage verification skipped; not on master channel.)',
+    );
+    coverageDirectory.deleteSync(recursive: true);
+    exit(0);
+  }
+
   final List<lcov.Record> records = await lcov.Parser.parse(
     'coverage/lcov.info',
   );