flutter/packages/flutter_tools/test/commands/create_test.dart

// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'dart:async';
import 'dart:convert';

import 'package:args/command_runner.dart';
import 'package:flutter_tools/src/base/file_system.dart';
import 'package:flutter_tools/src/base/io.dart';
import 'package:flutter_tools/src/cache.dart';
import 'package:flutter_tools/src/commands/create.dart';
import 'package:flutter_tools/src/dart/sdk.dart';
import 'package:flutter_tools/src/project.dart';
import 'package:flutter_tools/src/version.dart';
import 'package:mockito/mockito.dart';
import 'package:process/process.dart';

import '../src/common.dart';
import '../src/context.dart';

const String frameworkRevision = '12345678';
const String frameworkChannel = 'omega';

void main() {
  Directory tempDir;
  Directory projectDir;
  FlutterVersion mockFlutterVersion;
  LoggingProcessManager loggingProcessManager;

  setUpAll(() {
    Cache.disableLocking();
  });

  setUp(() {
    loggingProcessManager = LoggingProcessManager();
    tempDir = fs.systemTempDirectory.createTempSync('flutter_tools_create_test.');
    projectDir = tempDir.childDirectory('flutter_project');
    mockFlutterVersion = MockFlutterVersion();
  });

  tearDown(() {
    tryToDelete(tempDir);
  });

  // Verify that we create a default project ('application') that is
  // well-formed.
  testUsingContext('can create a default project', () async {
    await _createAndAnalyzeProject(projectDir, <String>[], <String>[
      '.android/app/',
      '.gitignore',
      '.ios/Flutter',
      '.metadata',
      'lib/main.dart',
      'pubspec.yaml',
      'README.md',
      'test/widget_test.dart',
    ], unexpectedPaths: <String>[
      'android/',
      'ios/',
    ]);
    return _runFlutterTest(projectDir);
  }, timeout: allowForRemotePubInvocation);

  testUsingContext('can create a legacy module project', () async {
    await _createAndAnalyzeProject(projectDir, <String>[
      '--template=module',
    ], <String>[
      '.android/app/',
      '.gitignore',
      '.ios/Flutter',
      '.metadata',
      'lib/main.dart',
      'pubspec.yaml',
      'README.md',
      'test/widget_test.dart',
    ], unexpectedPaths: <String>[
      'android/',
      'ios/',
    ]);
    return _runFlutterTest(projectDir);
  }, timeout: allowForRemotePubInvocation);

  testUsingContext('kotlin/swift legacy app project', () async {
    return _createProject(
      projectDir,
      <String>['--no-pub', '--template=app', '--android-language=kotlin', '--ios-language=swift'],
      <String>[
        'android/app/src/main/kotlin/com/example/flutterproject/MainActivity.kt',
        'ios/Runner/AppDelegate.swift',
        'ios/Runner/Runner-Bridging-Header.h',
        'lib/main.dart',
      ],
      unexpectedPaths: <String>[
        'android/app/src/main/java/com/example/flutterproject/MainActivity.java',
        'ios/Runner/AppDelegate.h',
        'ios/Runner/AppDelegate.m',
        'ios/Runner/main.m',
      ],
    );
  }, timeout: allowForCreateFlutterProject);

  testUsingContext('package project', () async {
    await _createAndAnalyzeProject(
      projectDir,
      <String>['--template=package'],
      <String>[
        'lib/flutter_project.dart',
        'test/flutter_project_test.dart',
      ],
      unexpectedPaths: <String>[
        'android/app/src/main/java/com/example/flutterproject/MainActivity.java',
        'android/src/main/java/com/example/flutterproject/FlutterProjectPlugin.java',
        'example/android/app/src/main/java/com/example/flutterprojectexample/MainActivity.java',
        'example/ios/Runner/AppDelegate.h',
        'example/ios/Runner/AppDelegate.m',
        'example/ios/Runner/main.m',
        'example/lib/main.dart',
        'ios/Classes/FlutterProjectPlugin.h',
        'ios/Classes/FlutterProjectPlugin.m',
        'ios/Runner/AppDelegate.h',
        'ios/Runner/AppDelegate.m',
        'ios/Runner/main.m',
        'lib/main.dart',
        'test/widget_test.dart',
      ],
    );
    return _runFlutterTest(projectDir);
  }, timeout: allowForRemotePubInvocation);

  testUsingContext('plugin project', () async {
    await _createAndAnalyzeProject(
      projectDir,
      <String>['--template=plugin'],
      <String>[
        'android/src/main/java/com/example/flutterproject/FlutterProjectPlugin.java',
        'example/android/app/src/main/java/com/example/flutterprojectexample/MainActivity.java',
        'example/ios/Runner/AppDelegate.h',
        'example/ios/Runner/AppDelegate.m',
        'example/ios/Runner/main.m',
        'example/lib/main.dart',
        'flutter_project.iml',
        'ios/Classes/FlutterProjectPlugin.h',
        'ios/Classes/FlutterProjectPlugin.m',
        'lib/flutter_project.dart',
      ],
    );
    return _runFlutterTest(projectDir.childDirectory('example'));
  }, timeout: allowForRemotePubInvocation);

  testUsingContext('kotlin/swift plugin project', () async {
    return _createProject(
      projectDir,
      <String>['--no-pub', '--template=plugin', '-a', 'kotlin', '--ios-language', 'swift'],
      <String>[
        'android/src/main/kotlin/com/example/flutterproject/FlutterProjectPlugin.kt',
        'example/android/app/src/main/kotlin/com/example/flutterprojectexample/MainActivity.kt',
        'example/ios/Runner/AppDelegate.swift',
        'example/ios/Runner/Runner-Bridging-Header.h',
        'example/lib/main.dart',
        'ios/Classes/FlutterProjectPlugin.h',
        'ios/Classes/FlutterProjectPlugin.m',
        'ios/Classes/SwiftFlutterProjectPlugin.swift',
        'lib/flutter_project.dart',
      ],
      unexpectedPaths: <String>[
        'android/src/main/java/com/example/flutterproject/FlutterProjectPlugin.java',
        'example/android/app/src/main/java/com/example/flutterprojectexample/MainActivity.java',
        'example/ios/Runner/AppDelegate.h',
        'example/ios/Runner/AppDelegate.m',
        'example/ios/Runner/main.m',
      ],
    );
  }, timeout: allowForCreateFlutterProject);

  testUsingContext('plugin project with custom org', () async {
    return _createProject(
      projectDir,
      <String>['--no-pub', '--template=plugin', '--org', 'com.bar.foo'],
      <String>[
        'android/src/main/java/com/bar/foo/flutterproject/FlutterProjectPlugin.java',
        'example/android/app/src/main/java/com/bar/foo/flutterprojectexample/MainActivity.java',
      ],
      unexpectedPaths: <String>[
        'android/src/main/java/com/example/flutterproject/FlutterProjectPlugin.java',
        'example/android/app/src/main/java/com/example/flutterprojectexample/MainActivity.java',
      ],
    );
  }, timeout: allowForCreateFlutterProject);

  testUsingContext('legacy app project with-driver-test', () async {
    return _createAndAnalyzeProject(
      projectDir,
      <String>['--with-driver-test', '--template=app'],
      <String>['lib/main.dart'],
    );
  }, timeout: allowForRemotePubInvocation);

  testUsingContext('application project with pub', () async {
    return _createProject(projectDir, <String>[
      '--template=application'
    ], <String>[
      '.android/build.gradle',
      '.android/Flutter/build.gradle',
      '.android/Flutter/src/main/AndroidManifest.xml',
      '.android/Flutter/src/main/java/io/flutter/facade/Flutter.java',
      '.android/Flutter/src/main/java/io/flutter/facade/FlutterFragment.java',
      '.android/Flutter/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java',
      '.android/gradle.properties',
      '.android/gradle/wrapper/gradle-wrapper.jar',
      '.android/gradle/wrapper/gradle-wrapper.properties',
      '.android/gradlew',
      '.android/gradlew.bat',
      '.android/include_flutter.groovy',
      '.android/local.properties',
      '.android/settings.gradle',
      '.gitignore',
      '.metadata',
      '.packages',
      'lib/main.dart',
      'pubspec.lock',
      'pubspec.yaml',
      'README.md',
      'test/widget_test.dart',
    ], unexpectedPaths: <String>[
      'android/',
      'ios/',
    ]);
  }, timeout: allowForRemotePubInvocation);

  testUsingContext('has correct content and formatting with applicaiton template', () async {
    Cache.flutterRoot = '../..';
    when(mockFlutterVersion.frameworkRevision).thenReturn(frameworkRevision);
    when(mockFlutterVersion.channel).thenReturn(frameworkChannel);

    final CreateCommand command = CreateCommand();
    final CommandRunner<Null> runner = createTestCommandRunner(command);

    await runner.run(<String>['create', '--template=application', '--no-pub', '--org', 'com.foo.bar', projectDir.path]);

    void expectExists(String relPath) {
      expect(fs.isFileSync('${projectDir.path}/$relPath'), true);
    }

    expectExists('lib/main.dart');
    expectExists('test/widget_test.dart');

    for (FileSystemEntity file in projectDir.listSync(recursive: true)) {
      if (file is File && file.path.endsWith('.dart')) {
        final String original = file.readAsStringSync();

        final Process process = await Process.start(
          sdkBinaryName('dartfmt'),
          <String>[file.path],
          workingDirectory: projectDir.path,
        );
        final String formatted = await process.stdout.transform(utf8.decoder).join();

        expect(original, formatted, reason: file.path);
      }
    }

    await _runFlutterTest(projectDir, target: fs.path.join(projectDir.path, 'test', 'widget_test.dart'));

    // Generated Xcode settings
    final String xcodeConfigPath = fs.path.join('.ios', 'Flutter', 'Generated.xcconfig');
    expectExists(xcodeConfigPath);
    final File xcodeConfigFile = fs.file(fs.path.join(projectDir.path, xcodeConfigPath));
    final String xcodeConfig = xcodeConfigFile.readAsStringSync();
    expect(xcodeConfig, contains('FLUTTER_ROOT='));
    expect(xcodeConfig, contains('FLUTTER_APPLICATION_PATH='));
    expect(xcodeConfig, contains('FLUTTER_TARGET='));
    // App identification
    final String xcodeProjectPath = fs.path.join('.ios', 'Runner.xcodeproj', 'project.pbxproj');
    expectExists(xcodeProjectPath);
    final File xcodeProjectFile = fs.file(fs.path.join(projectDir.path, xcodeProjectPath));
    final String xcodeProject = xcodeProjectFile.readAsStringSync();
    expect(xcodeProject, contains('PRODUCT_BUNDLE_IDENTIFIER = com.foo.bar.flutterProject'));

    final String versionPath = fs.path.join('.metadata');
    expectExists(versionPath);
    final String version = fs.file(fs.path.join(projectDir.path, versionPath)).readAsStringSync();
    expect(version, contains('version:'));
    expect(version, contains('revision: 12345678'));
    expect(version, contains('channel: omega'));

    // IntelliJ metadata
    final String intelliJSdkMetadataPath = fs.path.join('.idea', 'libraries', 'Dart_SDK.xml');
    expectExists(intelliJSdkMetadataPath);
    final String sdkMetaContents = fs
        .file(fs.path.join(
          projectDir.path,
          intelliJSdkMetadataPath,
        ))
        .readAsStringSync();
    expect(sdkMetaContents, contains('<root url="file:/'));
    expect(sdkMetaContents, contains('/bin/cache/dart-sdk/lib/core"'));
  }, overrides: <Type, Generator>{
    FlutterVersion: () => mockFlutterVersion,
  }, timeout: allowForCreateFlutterProject);

  testUsingContext('has correct content and formatting with legacy app template', () async {
    Cache.flutterRoot = '../..';
    when(mockFlutterVersion.frameworkRevision).thenReturn(frameworkRevision);
    when(mockFlutterVersion.channel).thenReturn(frameworkChannel);

    final CreateCommand command = CreateCommand();
    final CommandRunner<Null> runner = createTestCommandRunner(command);

    await runner.run(<String>['create', '--template=app', '--no-pub', '--org', 'com.foo.bar', projectDir.path]);

    void expectExists(String relPath) {
      expect(fs.isFileSync('${projectDir.path}/$relPath'), true);
    }

    expectExists('lib/main.dart');
    expectExists('test/widget_test.dart');

    for (FileSystemEntity file in projectDir.listSync(recursive: true)) {
      if (file is File && file.path.endsWith('.dart')) {
        final String original = file.readAsStringSync();

        final Process process = await Process.start(
          sdkBinaryName('dartfmt'),
          <String>[file.path],
          workingDirectory: projectDir.path,
        );
        final String formatted = await process.stdout.transform(utf8.decoder).join();

        expect(original, formatted, reason: file.path);
      }
    }

    await _runFlutterTest(projectDir, target: fs.path.join(projectDir.path, 'test', 'widget_test.dart'));

    // Generated Xcode settings
    final String xcodeConfigPath = fs.path.join('ios', 'Flutter', 'Generated.xcconfig');
    expectExists(xcodeConfigPath);
    final File xcodeConfigFile = fs.file(fs.path.join(projectDir.path, xcodeConfigPath));
    final String xcodeConfig = xcodeConfigFile.readAsStringSync();
    expect(xcodeConfig, contains('FLUTTER_ROOT='));
    expect(xcodeConfig, contains('FLUTTER_APPLICATION_PATH='));
    expect(xcodeConfig, contains('FLUTTER_FRAMEWORK_DIR='));
    // App identification
    final String xcodeProjectPath = fs.path.join('ios', 'Runner.xcodeproj', 'project.pbxproj');
    expectExists(xcodeProjectPath);
    final File xcodeProjectFile = fs.file(fs.path.join(projectDir.path, xcodeProjectPath));
    final String xcodeProject = xcodeProjectFile.readAsStringSync();
    expect(xcodeProject, contains('PRODUCT_BUNDLE_IDENTIFIER = com.foo.bar.flutterProject'));

    final String versionPath = fs.path.join('.metadata');
    expectExists(versionPath);
    final String version = fs.file(fs.path.join(projectDir.path, versionPath)).readAsStringSync();
    expect(version, contains('version:'));
    expect(version, contains('revision: 12345678'));
    expect(version, contains('channel: omega'));

    // IntelliJ metadata
    final String intelliJSdkMetadataPath = fs.path.join('.idea', 'libraries', 'Dart_SDK.xml');
    expectExists(intelliJSdkMetadataPath);
    final String sdkMetaContents = fs
        .file(fs.path.join(
          projectDir.path,
          intelliJSdkMetadataPath,
        ))
        .readAsStringSync();
    expect(sdkMetaContents, contains('<root url="file:/'));
    expect(sdkMetaContents, contains('/bin/cache/dart-sdk/lib/core"'));
  }, overrides: <Type, Generator>{
    FlutterVersion: () => mockFlutterVersion,
  }, timeout: allowForCreateFlutterProject);

  testUsingContext('can re-gen default template over existing project', () async {
    Cache.flutterRoot = '../..';

    final CreateCommand command = CreateCommand();
    final CommandRunner<Null> runner = createTestCommandRunner(command);

    await runner.run(<String>['create', '--no-pub', projectDir.path]);

    await runner.run(<String>['create', '--no-pub', projectDir.path]);
  }, timeout: allowForCreateFlutterProject);

  testUsingContext('can re-gen default template over existing legacy app project with no metadta and detect the type', () async {
    Cache.flutterRoot = '../..';

    final CreateCommand command = CreateCommand();
    final CommandRunner<Null> runner = createTestCommandRunner(command);

    await runner.run(<String>['create', '--no-pub', '--template=app', projectDir.path]);

    // Remove the .metadata to simulate an older instantiation that didn't generate those.
    fs.file(fs.path.join(projectDir.path, '.metadata')).deleteSync();

    await runner.run(<String>['create', '--no-pub', projectDir.path]);

    final String metadata = fs.file(fs.path.join(projectDir.path, '.metadata')).readAsStringSync();
    expect(metadata, contains('project_type: app\n'));
  }, timeout: allowForCreateFlutterProject);

  testUsingContext('can re-gen default template over existing legacy app project and detect the type', () async {
    Cache.flutterRoot = '../..';

    final CreateCommand command = CreateCommand();
    final CommandRunner<Null> runner = createTestCommandRunner(command);

    await runner.run(<String>['create', '--no-pub', '--template=app', projectDir.path]);

    await runner.run(<String>['create', '--no-pub', projectDir.path]);

    final String metadata = fs.file(fs.path.join(projectDir.path, '.metadata')).readAsStringSync();
    expect(metadata, contains('project_type: app\n'));
  }, timeout: allowForCreateFlutterProject);

  testUsingContext('can re-gen default template over existing plugin project and detect the type', () async {
    Cache.flutterRoot = '../..';

    final CreateCommand command = CreateCommand();
    final CommandRunner<Null> runner = createTestCommandRunner(command);

    await runner.run(<String>['create', '--no-pub', '--template=plugin', projectDir.path]);

    await runner.run(<String>['create', '--no-pub', projectDir.path]);

    final String metadata = fs.file(fs.path.join(projectDir.path, '.metadata')).readAsStringSync();
    expect(metadata, contains('project_type: plugin'));
  }, timeout: allowForCreateFlutterProject);

  testUsingContext('can re-gen default template over existing package project and detect the type', () async {
    Cache.flutterRoot = '../..';

    final CreateCommand command = CreateCommand();
    final CommandRunner<Null> runner = createTestCommandRunner(command);

    await runner.run(<String>['create', '--no-pub', '--template=package', projectDir.path]);

    await runner.run(<String>['create', '--no-pub', projectDir.path]);

    final String metadata = fs.file(fs.path.join(projectDir.path, '.metadata')).readAsStringSync();
    expect(metadata, contains('project_type: package'));
  }, timeout: allowForCreateFlutterProject);

  testUsingContext('can re-gen application .android/ folder, reusing custom org', () async {
    await _createProject(
      projectDir,
      <String>['--template=application', '--org', 'com.bar.foo'],
      <String>[],
    );
    projectDir.childDirectory('.android').deleteSync(recursive: true);
    return _createProject(
      projectDir,
      <String>[],
      <String>[
        '.android/app/src/main/java/com/bar/foo/flutterproject/host/MainActivity.java',
      ],
    );
  }, timeout: allowForRemotePubInvocation);

  testUsingContext('can re-gen application .ios/ folder, reusing custom org', () async {
    await _createProject(
      projectDir,
      <String>['--template=application', '--org', 'com.bar.foo'],
      <String>[],
    );
    projectDir.childDirectory('.ios').deleteSync(recursive: true);
    await _createProject(projectDir, <String>[], <String>[]);
    final FlutterProject project = await FlutterProject.fromDirectory(projectDir);
    expect(
      project.ios.productBundleIdentifier,
      'com.bar.foo.flutterProject',
    );
  }, timeout: allowForRemotePubInvocation);

  testUsingContext('can re-gen legacy app android/ folder, reusing custom org', () async {
    await _createProject(
      projectDir,
      <String>['--no-pub', '--template=app', '--org', 'com.bar.foo'],
      <String>[],
    );
    projectDir.childDirectory('android').deleteSync(recursive: true);
    return _createProject(
      projectDir,
      <String>['--no-pub'],
      <String>[
        'android/app/src/main/java/com/bar/foo/flutterproject/MainActivity.java',
      ],
      unexpectedPaths: <String>[
        'android/app/src/main/java/com/example/flutterproject/MainActivity.java',
      ],
    );
  }, timeout: allowForCreateFlutterProject);

  testUsingContext('can re-gen legacy app ios/ folder, reusing custom org', () async {
    await _createProject(
      projectDir,
      <String>['--no-pub', '--template=app', '--org', 'com.bar.foo'],
      <String>[],
    );
    projectDir.childDirectory('ios').deleteSync(recursive: true);
    await _createProject(projectDir, <String>['--no-pub'], <String>[]);
    final FlutterProject project = await FlutterProject.fromDirectory(projectDir);
    expect(
      project.ios.productBundleIdentifier,
      'com.bar.foo.flutterProject',
    );
  }, timeout: allowForCreateFlutterProject);

  testUsingContext('can re-gen plugin ios/ and example/ folders, reusing custom org', () async {
    await _createProject(
      projectDir,
      <String>['--no-pub', '--template=plugin', '--org', 'com.bar.foo'],
      <String>[],
    );
    projectDir.childDirectory('example').deleteSync(recursive: true);
    projectDir.childDirectory('ios').deleteSync(recursive: true);
    await _createProject(
      projectDir,
      <String>['--no-pub', '--template=plugin'],
      <String>[
        'example/android/app/src/main/java/com/bar/foo/flutterprojectexample/MainActivity.java',
        'ios/Classes/FlutterProjectPlugin.h',
      ],
      unexpectedPaths: <String>[
        'example/android/app/src/main/java/com/example/flutterprojectexample/MainActivity.java',
        'android/src/main/java/com/example/flutterproject/FlutterProjectPlugin.java',
      ],
    );
    final FlutterProject project = await FlutterProject.fromDirectory(projectDir);
    expect(
      project.example.ios.productBundleIdentifier,
      'com.bar.foo.flutterProjectExample',
    );
  }, timeout: allowForCreateFlutterProject);

  testUsingContext('fails to re-gen without specified org when org is ambiguous', () async {
    await _createProject(
      projectDir,
      <String>['--no-pub', '--template=app', '--org', 'com.bar.foo'],
      <String>[],
    );
    fs.directory(fs.path.join(projectDir.path, 'ios')).deleteSync(recursive: true);
    await _createProject(
      projectDir,
      <String>['--no-pub', '--template=app', '--org', 'com.bar.baz'],
      <String>[],
    );
    expect(
      () => _createProject(projectDir, <String>[], <String>[]),
      throwsToolExit(message: 'Ambiguous organization'),
    );
  }, timeout: allowForCreateFlutterProject);

  // Verify that we help the user correct an option ordering issue
  testUsingContext('produces sensible error message', () async {
    Cache.flutterRoot = '../..';

    final CreateCommand command = CreateCommand();
    final CommandRunner<Null> runner = createTestCommandRunner(command);

    expect(
      runner.run(<String>['create', projectDir.path, '--pub']),
      throwsToolExit(exitCode: 2, message: 'Try moving --pub'),
    );
  });

  // Verify that we fail with an error code when the file exists.
  testUsingContext('fails when file exists', () async {
    Cache.flutterRoot = '../..';
    final CreateCommand command = CreateCommand();
    final CommandRunner<Null> runner = createTestCommandRunner(command);
    final File existingFile = fs.file('${projectDir.path.toString()}/bad');
    if (!existingFile.existsSync()) {
      existingFile.createSync(recursive: true);
    }
    expect(
      runner.run(<String>['create', existingFile.path]),
      throwsToolExit(message: 'file exists'),
    );
  });

  testUsingContext('fails when invalid package name', () async {
    Cache.flutterRoot = '../..';
    final CreateCommand command = CreateCommand();
    final CommandRunner<Null> runner = createTestCommandRunner(command);
    expect(
      runner.run(<String>['create', fs.path.join(projectDir.path, 'invalidName')]),
      throwsToolExit(message: '"invalidName" is not a valid Dart package name.'),
    );
  });

  testUsingContext(
    'invokes pub offline when requested',
    () async {
      Cache.flutterRoot = '../..';

      final CreateCommand command = CreateCommand();
      final CommandRunner<Null> runner = createTestCommandRunner(command);

      await runner.run(<String>['create', '--pub', '--offline', projectDir.path]);
      expect(loggingProcessManager.commands.first, contains(matches(r'dart-sdk[\\/]bin[\\/]pub')));
      expect(loggingProcessManager.commands.first, contains('--offline'));
    },
    timeout: allowForCreateFlutterProject,
    overrides: <Type, Generator>{
      ProcessManager: () => loggingProcessManager,
    },
  );

  testUsingContext(
    'invokes pub online when offline not requested',
    () async {
      Cache.flutterRoot = '../..';

      final CreateCommand command = CreateCommand();
      final CommandRunner<Null> runner = createTestCommandRunner(command);

      await runner.run(<String>['create', '--pub', projectDir.path]);
      expect(loggingProcessManager.commands.first, contains(matches(r'dart-sdk[\\/]bin[\\/]pub')));
      expect(loggingProcessManager.commands.first, isNot(contains('--offline')));
    },
    timeout: allowForCreateFlutterProject,
    overrides: <Type, Generator>{
      ProcessManager: () => loggingProcessManager,
    },
  );
}

Future<Null> _createProject(
  Directory dir,
  List<String> createArgs,
  List<String> expectedPaths, {
  List<String> unexpectedPaths = const <String>[],
}) async {
  Cache.flutterRoot = '../..';
  final CreateCommand command = CreateCommand();
  final CommandRunner<Null> runner = createTestCommandRunner(command);
  final List<String> args = <String>['create'];
  args.addAll(createArgs);
  args.add(dir.path);
  await runner.run(args);

  bool pathExists(String path) {
    final String fullPath = fs.path.join(dir.path, path);
    return fs.typeSync(fullPath) != FileSystemEntityType.notFound;
  }

  final List<String> failures = <String>[];
  for (String path in expectedPaths) {
    if (!pathExists(path)) {
      failures.add('Path "$path" does not exist.');
    }
  }
  for (String path in unexpectedPaths) {
    if (pathExists(path)) {
      failures.add('Path "$path" exists when it shouldn\'t.');
    }
  }
  expect(failures, isEmpty, reason: failures.join('\n'));
}

Future<Null> _createAndAnalyzeProject(
  Directory dir,
  List<String> createArgs,
  List<String> expectedPaths, {
  List<String> unexpectedPaths = const <String>[],
}) async {
  await _createProject(dir, createArgs, expectedPaths, unexpectedPaths: unexpectedPaths);
  await _analyzeProject(dir.path);
}

Future<Null> _analyzeProject(String workingDir) async {
  final String flutterToolsPath = fs.path.absolute(fs.path.join(
    'bin',
    'flutter_tools.dart',
  ));

  final List<String> args = <String>[]
    ..addAll(dartVmFlags)
    ..add(flutterToolsPath)
    ..add('analyze');

  final ProcessResult exec = await Process.run(
    '$dartSdkPath/bin/dart',
    args,
    workingDirectory: workingDir,
  );
  if (exec.exitCode != 0) {
    print(exec.stdout);
    print(exec.stderr);
  }
  expect(exec.exitCode, 0);
}

Future<Null> _runFlutterTest(Directory workingDir, {String target}) async {
  final String flutterToolsPath = fs.path.absolute(fs.path.join(
    'bin',
    'flutter_tools.dart',
  ));

  final List<String> args = <String>[]
    ..addAll(dartVmFlags)
    ..add(flutterToolsPath)
    ..add('test')
    ..add('--no-color');
  if (target != null) {
    args.add(target);
  }

  final ProcessResult exec = await Process.run(
    '$dartSdkPath/bin/dart',
    args,
    workingDirectory: workingDir.path,
  );
  if (exec.exitCode != 0) {
    print(exec.stdout);
    print(exec.stderr);
  }
  expect(exec.exitCode, 0);
}

class MockFlutterVersion extends Mock implements FlutterVersion {}

/// A ProcessManager that invokes a real process manager, but keeps
/// track of all commands sent to it.
class LoggingProcessManager extends LocalProcessManager {
  List<List<String>> commands = <List<String>>[];

  @override
  Future<Process> start(
    List<dynamic> command, {
    String workingDirectory,
    Map<String, String> environment,
    bool includeParentEnvironment = true,
    bool runInShell = false,
    ProcessStartMode mode = ProcessStartMode.normal,
  }) {
    commands.add(command);
    return super.start(
      command,
      workingDirectory: workingDirectory,
      environment: environment,
      includeParentEnvironment: includeParentEnvironment,
      runInShell: runInShell,
      mode: mode,
    );
  }
}