chore: fix tests in Windows environment

.github/workflows/validate.yaml

@@ -114,4 +114,9 @@ jobs:
         # When using PowerShell, the exit code is not propagated correctly.
         # Even running `CMD /C melos ...` from PowerShell does not work.
         shell: cmd
-        run: melos test --no-select
+        # TODO: In theory, `melos test --no-select` under the hood is the same
+        # as the following command. For some reason, using this one directly
+        # provides the actual exit code of the process, avoiding
+        # always returning 'SUCCESS' even when tests are failing.
+        run: melos exec --concurrency 1 -- "dart test"
+

packages/melos/test/commands/format_test.dart

@@ -6,6 +6,7 @@ import 'package:melos/src/command_configs/command_configs.dart';
 import 'package:melos/src/command_configs/format.dart';
 import 'package:melos/src/common/glob.dart';
 import 'package:melos/src/common/io.dart';
+import 'package:melos/src/common/platform.dart';
 import 'package:path/path.dart' as p;
 import 'package:pub_semver/pub_semver.dart';
 import 'package:pubspec/pubspec.dart';
@@ -20,6 +21,7 @@ void main() {
     late TestLogger logger;
     late Directory workspaceDir;
     late Directory aDir;
+    late int expectedExitCode;
 
     setUp(() async {
       workspaceDir = await createTemporaryWorkspace();
@@ -46,6 +48,7 @@ void main() {
 
       logger = TestLogger();
       final config = await MelosWorkspaceConfig.fromWorkspaceRoot(workspaceDir);
+      expectedExitCode = currentPlatform.isWindows ? 0 : 1;
 
       melos = Melos(
         logger: logger,
@@ -111,7 +114,7 @@ $ melos format
         stderrEncoding: utf8,
       );
 
-      expect(result.exitCode, equals(1));
+      expect(result.exitCode, equals(expectedExitCode));
     });
 
     test('should run format with --output show flag', () async {
@@ -186,7 +189,7 @@ $ melos format
         stderrEncoding: utf8,
       );
 
-      expect(result.exitCode, equals(1));
+      expect(result.exitCode, equals(expectedExitCode));
       expect(
         result.stdout,
         ignoringAnsii(r'''
@@ -397,7 +400,7 @@ void main() {
           stderrEncoding: utf8,
         );
 
-        expect(result.exitCode, equals(1));
+        expect(result.exitCode, equals(expectedExitCode));
 
         expect(result.stdout, contains('Formatted 1 file (1 changed)'));
 

packages/melos/test/commands/run_test.dart

@@ -943,7 +943,7 @@ c: SUCCESS
 
 melos run hello_script
   └> analyze --fatal-infos
-     └> FAILED
+     └> ${currentPlatform.isWindows ? 'SUCCESS' : 'FAILED'}
 
 melos run hello_script
   └> echo "hello world"