Fix embedding FlutterMacOS.framework for macOS add2app via cocoapods (#144248)

Fixes https://github.com/flutter/flutter/issues/144244.

dev/devicelab/bin/tasks/build_ios_framework_module_test.dart

@@ -810,6 +810,41 @@ Future<void> _testBuildMacOSFramework(Directory projectDir) async {
     'GeneratedPluginRegistrant.swift',
   ));
 
+  section('Validate embed FlutterMacOS.framework with CocoaPods');
+
+  final File podspec = File(path.join(
+    cocoapodsOutputPath,
+    'Debug',
+    'FlutterMacOS.podspec',
+  ));
+
+  podspec.writeAsStringSync(
+    podspec.readAsStringSync().replaceFirst('null.null.0', '0.0.0'),
+  );
+
+  final Directory macosDirectory = Directory(path.join(projectDir.path, 'macos'));
+  final File podfile = File(path.join(macosDirectory.path, 'Podfile'));
+  final String currentPodfile = podfile.readAsStringSync();
+
+  // Temporarily test Add-to-App Cocoapods podspec for framework
+  podfile.writeAsStringSync('''
+target 'Runner' do
+  # Comment the next line if you don't want to use dynamic frameworks
+  use_frameworks!
+
+  pod 'FlutterMacOS', :podspec => '${podspec.path}'
+end
+''');
+  await inDirectory(macosDirectory, () async {
+    await eval('pod', <String>['install']);
+  });
+
+  // Change podfile back to original
+  podfile.writeAsStringSync(currentPodfile);
+  await inDirectory(macosDirectory, () async {
+    await eval('pod', <String>['install']);
+  });
+
   section('Build frameworks without plugins');
   await _testBuildFrameworksWithoutPlugins(projectDir, platform: 'macos');
 }

packages/flutter_tools/lib/src/commands/build_macos_framework.dart

@@ -186,7 +186,7 @@ $licenseSource
 LICENSE
   }
   s.author                = { 'Flutter Dev Team' => 'flutter-dev@googlegroups.com' }
-  s.source                = { :http => '${cache.storageBaseUrl}/flutter_infra_release/flutter/${cache.engineRevision}/$artifactsMode/artifacts.zip' }
+  s.source                = { :http => '${cache.storageBaseUrl}/flutter_infra_release/flutter/${cache.engineRevision}/$artifactsMode/FlutterMacOS.framework.zip' }
   s.documentation_url     = 'https://flutter.dev/docs'
   s.osx.deployment_target = '10.14'
   s.vendored_frameworks   = 'FlutterMacOS.framework'

packages/flutter_tools/test/commands.shard/hermetic/build_darwin_framework_test.dart

@@ -470,7 +470,7 @@ void main() {
 
             final File expectedPodspec = outputDirectory.childFile('FlutterMacOS.podspec');
             final String podspecContents = expectedPodspec.readAsStringSync();
-            expect(podspecContents, contains("'$storageBaseUrl/flutter_infra_release/flutter/$engineRevision/darwin-x64/artifacts.zip'"));
+            expect(podspecContents, contains("'$storageBaseUrl/flutter_infra_release/flutter/$engineRevision/darwin-x64/FlutterMacOS.framework.zip'"));
           }, overrides: <Type, Generator>{
             FileSystem: () => memoryFileSystem,
             ProcessManager: () => FakeProcessManager.any(),
@@ -489,7 +489,7 @@ void main() {
 
             final File expectedPodspec = outputDirectory.childFile('FlutterMacOS.podspec');
             final String podspecContents = expectedPodspec.readAsStringSync();
-            expect(podspecContents, contains("'$storageBaseUrl/flutter_infra_release/flutter/$engineRevision/darwin-x64-profile/artifacts.zip'"));
+            expect(podspecContents, contains("'$storageBaseUrl/flutter_infra_release/flutter/$engineRevision/darwin-x64-profile/FlutterMacOS.framework.zip'"));
           }, overrides: <Type, Generator>{
             FileSystem: () => memoryFileSystem,
             ProcessManager: () => FakeProcessManager.any(),
@@ -508,7 +508,7 @@ void main() {
 
             final File expectedPodspec = outputDirectory.childFile('FlutterMacOS.podspec');
             final String podspecContents = expectedPodspec.readAsStringSync();
-            expect(podspecContents, contains("'$storageBaseUrl/flutter_infra_release/flutter/$engineRevision/darwin-x64-release/artifacts.zip'"));
+            expect(podspecContents, contains("'$storageBaseUrl/flutter_infra_release/flutter/$engineRevision/darwin-x64-release/FlutterMacOS.framework.zip'"));
           }, overrides: <Type, Generator>{
             FileSystem: () => memoryFileSystem,
             ProcessManager: () => FakeProcessManager.any(),