[tool] Extend flutter test workaround to other desktops (#6024)

Expand the multiple-test-files workaround in `drive-examples` from macOS to all of the desktop platforms, now that we know it's not macOS-specific.

See https://github.com/flutter/flutter/issues/135673

script/tool/lib/src/drive_examples_command.dart

@@ -404,8 +404,10 @@ class DriveExamplesCommand extends PackageLoopingCommand {
     // Workaround for https://github.com/flutter/flutter/issues/135673
     // Once that is fixed on stable, this logic can be removed and the command
     // can always just be run with "integration_test".
-    final bool needsMultipleInvocations =
+    final bool needsMultipleInvocations = testFiles.length > 1 &&
-        testFiles.length > 1 && getBoolArg(platformMacOS);
+        (getBoolArg(platformLinux) ||
+            getBoolArg(platformMacOS) ||
+            getBoolArg(platformWindows));
     final Iterable<String> individualRunTargets = needsMultipleInvocations
         ? testFiles
             .map((File f) => getRelativePosixPath(f, from: example.directory))

script/tool/test/drive_examples_command_test.dart

@@ -450,7 +450,8 @@ void main() {
 
     // This tests the workaround for https://github.com/flutter/flutter/issues/135673
     // and the behavior it tests should be removed once that is fixed.
-    test('runs tests separately on macOS', () async {
+    group('runs tests separately on desktop', () {
+      test('macOS', () async {
         final RepositoryPackage plugin = createFakePlugin(
           'plugin',
           packagesDir,
@@ -503,6 +504,117 @@ void main() {
             ]));
       });
 
+      // This tests the workaround for https://github.com/flutter/flutter/issues/135673
+      // and the behavior it tests should be removed once that is fixed.
+      test('Linux', () async {
+        final RepositoryPackage plugin = createFakePlugin(
+          'plugin',
+          packagesDir,
+          extraFiles: <String>[
+            'example/integration_test/first_test.dart',
+            'example/integration_test/second_test.dart',
+            'example/linux/foo.cc',
+          ],
+          platformSupport: <String, PlatformDetails>{
+            platformLinux: const PlatformDetails(PlatformSupport.inline),
+          },
+        );
+
+        final Directory pluginExampleDirectory = getExampleDir(plugin);
+
+        final List<String> output = await runCapturingPrint(runner, <String>[
+          'drive-examples',
+          '--linux',
+        ]);
+
+        expect(
+          output,
+          containsAllInOrder(<Matcher>[
+            contains('Running for plugin'),
+            contains('No issues found!'),
+          ]),
+        );
+
+        expect(
+            processRunner.recordedCalls,
+            orderedEquals(<ProcessCall>[
+              ProcessCall(
+                  getFlutterCommand(mockPlatform),
+                  const <String>[
+                    'test',
+                    '-d',
+                    'linux',
+                    'integration_test/first_test.dart',
+                  ],
+                  pluginExampleDirectory.path),
+              ProcessCall(
+                  getFlutterCommand(mockPlatform),
+                  const <String>[
+                    'test',
+                    '-d',
+                    'linux',
+                    'integration_test/second_test.dart',
+                  ],
+                  pluginExampleDirectory.path),
+            ]));
+      });
+
+      // This tests the workaround for https://github.com/flutter/flutter/issues/135673
+      // and the behavior it tests should be removed once that is fixed.
+      test('Windows', () async {
+        final RepositoryPackage plugin = createFakePlugin(
+          'plugin',
+          packagesDir,
+          extraFiles: <String>[
+            'example/integration_test/first_test.dart',
+            'example/integration_test/second_test.dart',
+            'example/windows/foo.cpp',
+          ],
+          platformSupport: <String, PlatformDetails>{
+            platformWindows: const PlatformDetails(PlatformSupport.inline),
+          },
+        );
+
+        final Directory pluginExampleDirectory = getExampleDir(plugin);
+
+        final List<String> output = await runCapturingPrint(runner, <String>[
+          'drive-examples',
+          '--windows',
+        ]);
+
+        expect(
+          output,
+          containsAllInOrder(<Matcher>[
+            contains('Running for plugin'),
+            contains('No issues found!'),
+          ]),
+        );
+
+        expect(
+            processRunner.recordedCalls,
+            orderedEquals(<ProcessCall>[
+              ProcessCall(
+                  getFlutterCommand(mockPlatform),
+                  const <String>[
+                    'test',
+                    '-d',
+                    'windows',
+                    'integration_test/first_test.dart',
+                  ],
+                  pluginExampleDirectory.path),
+              ProcessCall(
+                  getFlutterCommand(mockPlatform),
+                  const <String>[
+                    'test',
+                    '-d',
+                    'windows',
+                    'integration_test/second_test.dart',
+                  ],
+                  pluginExampleDirectory.path),
+            ]));
+      });
+    });
+
     test('driving when plugin does not suppport web is a no-op', () async {
       createFakePlugin('plugin', packagesDir, extraFiles: <String>[
         'example/integration_test/plugin_test.dart',