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

@@ -85,18 +85,8 @@ 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 [[ "$CHANNEL" == "master" ]]; then
-        -   ./script/tool_runner.sh build-examples --apk --exclude=extension_google_sign_in_as_googleapis_auth
-        -   ./script/tool_runner.sh native-test --android --no-integration
-        - else
-        -   ./script/tool_runner.sh build-examples --apk --exclude=extension_google_sign_in_as_googleapis_auth,rfw
-        -   ./script/tool_runner.sh native-test --android --no-integration --exclude=rfw
-        - fi
+        - ./script/tool_runner.sh build-examples --apk --exclude=extension_google_sign_in_as_googleapis_auth
+        - ./script/tool_runner.sh native-test --android --no-integration
       depends_on:
         - format+analyze
     - name: web_benchmarks_test
@@ -127,16 +117,7 @@ task:
       CHANNEL: "stable"
   << : *FLUTTER_UPGRADE_TEMPLATE
   build_script:
-    # Exclude rfw until the next Flutter stable release because it depends
-    # on features that have never shipped to stable. (The rfw package has
-    # never worked on stable so this is not going to break anyone.)
-    # When updating this, also look at the android tests above.
-    # When updating this, also update the `rfw/run_tests.sh` file.
-    - if [[ "$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/test_coverage/bin/test_coverage.dart

@@ -15,18 +15,6 @@ 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()) {
@@ -45,9 +33,16 @@ Future<void> main(List<String> arguments) async {
     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',
   );