wire in fuchsiaApp (#33781)

packages/flutter_tools/lib/src/application_package.dart

@@ -387,10 +387,11 @@ class PrebuiltIOSApp extends IOSApp {
 }
 
 class ApplicationPackageStore {
-  ApplicationPackageStore({ this.android, this.iOS });
+  ApplicationPackageStore({ this.android, this.iOS, this.fuchsia });
 
   AndroidApk android;
   IOSApp iOS;
+  FuchsiaApp fuchsia;
 
   Future<ApplicationPackage> getPackageForPlatform(TargetPlatform platform) async {
     switch (platform) {
@@ -403,10 +404,12 @@ class ApplicationPackageStore {
       case TargetPlatform.ios:
         iOS ??= IOSApp.fromIosProject(FlutterProject.current().ios);
         return iOS;
+      case TargetPlatform.fuchsia:
+        fuchsia ??= FuchsiaApp.fromFuchsiaProject(FlutterProject.current().fuchsia);
+        return fuchsia;
       case TargetPlatform.darwin_x64:
       case TargetPlatform.linux_x64:
       case TargetPlatform.windows_x64:
-      case TargetPlatform.fuchsia:
       case TargetPlatform.tester:
       case TargetPlatform.web:
         return null;

packages/flutter_tools/lib/src/fuchsia/application_package.dart

@@ -7,6 +7,7 @@ import 'package:meta/meta.dart';
 import '../application_package.dart';
 import '../base/file_system.dart';
 import '../build_info.dart';
+import '../globals.dart';
 import '../project.dart';
 
 abstract class FuchsiaApp extends ApplicationPackage {
@@ -14,6 +15,11 @@ abstract class FuchsiaApp extends ApplicationPackage {
 
   /// Creates a new [FuchsiaApp] from a fuchsia sub project.
   factory FuchsiaApp.fromFuchsiaProject(FuchsiaProject project) {
+    if (!project.existsSync()) {
+      // If the project doesn't exist at all the current hint to run flutter
+      // create is accurate.
+      return null;
+    }
     return BuildableFuchsiaApp(
       project: project,
     );
@@ -23,6 +29,11 @@ abstract class FuchsiaApp extends ApplicationPackage {
   ///
   /// [applicationBinary] is the path to the .far archive.
   factory FuchsiaApp.fromPrebuiltApp(FileSystemEntity applicationBinary) {
+    final FileSystemEntityType entityType = fs.typeSync(applicationBinary.path);
+    if (entityType != FileSystemEntityType.file) {
+      printError('File "${applicationBinary.path}" does not exist or is not a .far file. Use far archive.');
+      return null;
+    }
     return PrebuiltFuchsiaApp(
       farArchive: applicationBinary.path,
     );

packages/flutter_tools/test/application_package_test.dart

@@ -10,6 +10,7 @@ import 'package:file/memory.dart';
 import 'package:flutter_tools/src/base/platform.dart';
 import 'package:flutter_tools/src/build_info.dart';
 import 'package:flutter_tools/src/cache.dart';
+import 'package:flutter_tools/src/fuchsia/application_package.dart';
 import 'package:flutter_tools/src/project.dart';
 import 'package:mockito/mockito.dart';
 
@@ -305,6 +306,52 @@ void main() {
       expect(iosApp, null);
     }, overrides: overrides);
   });
+
+  group('FuchsiaApp', () {
+    final Map<Type, Generator> overrides = <Type, Generator>{
+      FileSystem: () => MemoryFileSystem(),
+      Platform: _kNoColorTerminalPlatform,
+      OperatingSystemUtils: () => MockOperatingSystemUtils(),
+    };
+    testUsingContext('Error on non-existing file', () {
+      final PrebuiltFuchsiaApp fuchsiaApp =
+          FuchsiaApp.fromPrebuiltApp(fs.file('not_existing.far'));
+      expect(fuchsiaApp, isNull);
+      final BufferLogger logger = context.get<Logger>();
+      expect(
+        logger.errorText,
+        'File "not_existing.far" does not exist or is not a .far file. Use far archive.\n',
+      );
+    }, overrides: overrides);
+
+    testUsingContext('Error on non-far file', () {
+      fs.directory('regular_folder').createSync();
+      final PrebuiltFuchsiaApp fuchsiaApp =
+          FuchsiaApp.fromPrebuiltApp(fs.file('regular_folder'));
+      expect(fuchsiaApp, isNull);
+      final BufferLogger logger = context.get<Logger>();
+      expect(
+        logger.errorText,
+        'File "regular_folder" does not exist or is not a .far file. Use far archive.\n',
+      );
+    }, overrides: overrides);
+
+    testUsingContext('Success with far file', () {
+      fs.file('bundle.far').createSync();
+      final PrebuiltFuchsiaApp fuchsiaApp = FuchsiaApp.fromPrebuiltApp(fs.file('bundle.far'));
+      final BufferLogger logger = context.get<Logger>();
+      expect(logger.errorText, isEmpty);
+      expect(fuchsiaApp.id, 'bundle.far');
+    }, overrides: overrides);
+
+    testUsingContext('returns null when there is no fuchsia', () async {
+      fs.file('pubspec.yaml').createSync();
+      fs.file('.packages').createSync();
+      final BuildableFuchsiaApp fuchsiaApp = FuchsiaApp.fromFuchsiaProject(FlutterProject.fromDirectory(fs.currentDirectory).fuchsia);
+
+      expect(fuchsiaApp, null);
+    }, overrides: overrides);
+  });
 }
 
 const String _aaptDataWithExplicitEnabledAndMainLauncherActivity =