Swap Mocks to Fakes in build_fuchsia_test (#76266)

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

@@ -17,14 +17,14 @@ import 'package:flutter_tools/src/fuchsia/fuchsia_pm.dart';
 import 'package:flutter_tools/src/fuchsia/fuchsia_sdk.dart';
 import 'package:flutter_tools/src/project.dart';
 import 'package:meta/meta.dart';
-import 'package:mockito/mockito.dart';
 import 'package:process/process.dart';
+import 'package:test/fake.dart';
 
 import '../../src/common.dart';
 import '../../src/context.dart';
 import '../../src/testbed.dart';
 
-// Defined globally for mocks to use.
+// Defined globally for fakes to use.
 FileSystem fileSystem;
 
 void main() {
@@ -42,10 +42,10 @@ void main() {
       'FLUTTER_ROOT': '/'
     },
   );
-  MockFuchsiaSdk fuchsiaSdk;
+  FakeFuchsiaSdk fuchsiaSdk;
 
   setUp(() {
-    fuchsiaSdk = MockFuchsiaSdk();
+    fuchsiaSdk = FakeFuchsiaSdk();
     fileSystem = MemoryFileSystem.test();
   });
 
@@ -172,7 +172,7 @@ void main() {
   });
 }
 
-class MockFuchsiaPM extends Mock implements FuchsiaPM {
+class FakeFuchsiaPM extends Fake implements FuchsiaPM {
   String _appName;
 
   @override
@@ -224,7 +224,7 @@ class MockFuchsiaPM extends Mock implements FuchsiaPM {
   }
 }
 
-class MockFuchsiaKernelCompiler extends Mock implements FuchsiaKernelCompiler {
+class FakeFuchsiaKernelCompiler extends Fake implements FuchsiaKernelCompiler {
   @override
   Future<void> build({
     @required FuchsiaProject fuchsiaProject,
@@ -238,11 +238,11 @@ class MockFuchsiaKernelCompiler extends Mock implements FuchsiaKernelCompiler {
   }
 }
 
-class MockFuchsiaSdk extends Mock implements FuchsiaSdk {
+class FakeFuchsiaSdk extends Fake implements FuchsiaSdk {
   @override
-  final FuchsiaPM fuchsiaPM = MockFuchsiaPM();
+  final FuchsiaPM fuchsiaPM = FakeFuchsiaPM();
 
   @override
   final FuchsiaKernelCompiler fuchsiaKernelCompiler =
-      MockFuchsiaKernelCompiler();
+      FakeFuchsiaKernelCompiler();
 }