[quick_actions]make QuickActions testable (#1067)

packages/quick_actions/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.3.1
+
+* Added unit tests.
+
 ## 0.3.0+2
 
 * Add missing template type parameter to `invokeMethod` calls.

packages/quick_actions/example/lib/main.dart

@@ -36,7 +36,7 @@ class _MyHomePageState extends State<MyHomePage> {
   @override
   void initState() {
     super.initState();
-    final QuickActions quickActions = const QuickActions();
+    final QuickActions quickActions = QuickActions();
     quickActions.initialize((String shortcutType) {
       if (shortcutType == 'action_main') {
         print('The user tapped on the "Main view" action.');

packages/quick_actions/lib/quick_actions.dart

@@ -36,13 +36,21 @@ class ShortcutItem {
 
 /// Quick actions plugin.
 class QuickActions {
-  const QuickActions();
+  factory QuickActions() => _instance;
+
+  @visibleForTesting
+  QuickActions.withMethodChannel(this.channel);
+
+  static final QuickActions _instance =
+      QuickActions.withMethodChannel(_kChannel);
+
+  final MethodChannel channel;
 
   /// Initializes this plugin.
   ///
   /// Call this once before any further interaction with the the plugin.
   void initialize(QuickActionHandler handler) {
-    _kChannel.setMethodCallHandler((MethodCall call) async {
+    channel.setMethodCallHandler((MethodCall call) async {
       assert(call.method == 'launch');
       handler(call.arguments);
     });
@@ -52,12 +60,12 @@ class QuickActions {
   Future<void> setShortcutItems(List<ShortcutItem> items) async {
     final List<Map<String, String>> itemsList =
         items.map(_serializeItem).toList();
-    await _kChannel.invokeMethod<void>('setShortcutItems', itemsList);
+    await channel.invokeMethod<void>('setShortcutItems', itemsList);
   }
 
   /// Removes all [ShortcutItem]s registered for the app.
   Future<void> clearShortcutItems() =>
-      _kChannel.invokeMethod<void>('clearShortcutItems');
+      channel.invokeMethod<void>('clearShortcutItems');
 
   Map<String, String> _serializeItem(ShortcutItem item) {
     return <String, String>{

packages/quick_actions/pubspec.yaml

@@ -3,7 +3,7 @@ description: Flutter plugin for creating shortcuts on home screen, also known as
   Quick Actions on iOS and App Shortcuts on Android.
 author: Flutter Team <flutter-dev@googlegroups.com>
 homepage: https://github.com/flutter/plugins/tree/master/packages/quick_actions
-version: 0.3.0+2
+version: 0.3.1
 
 flutter:
   plugin:
@@ -16,6 +16,12 @@ dependencies:
     sdk: flutter
   meta: ^1.0.5
 
+dev_dependencies:
+  test: ^1.3.0
+  mockito: ^3.0.0
+  flutter_test:
+    sdk: flutter
+
 environment:
   sdk: ">=2.0.0-dev.28.0 <3.0.0"
   flutter: ">=1.5.0 <2.0.0"

packages/quick_actions/test/quick_actions_test.dart

@@ -0,0 +1,58 @@
+// Copyright 2017 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 'package:flutter/services.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:quick_actions/quick_actions.dart';
+
+void main() {
+  QuickActions quickActions;
+  final List<MethodCall> log = <MethodCall>[];
+
+  setUp(() {
+    quickActions = QuickActions();
+    quickActions.channel.setMockMethodCallHandler(
+      (MethodCall methodCall) async {
+        log.add(methodCall);
+        return null;
+      },
+    );
+  });
+
+  test('setShortcutItems with demo data', () async {
+    const String type = 'type';
+    const String localizedTitle = 'localizedTitle';
+    const String icon = 'icon';
+    await quickActions.setShortcutItems(
+      const <ShortcutItem>[
+        ShortcutItem(type: type, localizedTitle: localizedTitle, icon: icon)
+      ],
+    );
+    expect(
+      log,
+      <Matcher>[
+        isMethodCall(
+          'setShortcutItems',
+          arguments: <Map<String, String>>[
+            <String, String>{
+              'type': type,
+              'localizedTitle': localizedTitle,
+              'icon': icon,
+            }
+          ],
+        ),
+      ],
+    );
+    log.clear();
+  });
+
+  test('clearShortcutItems', () {
+    quickActions.clearShortcutItems();
+    expect(
+      log,
+      <Matcher>[
+        isMethodCall('clearShortcutItems', arguments: null),
+      ],
+    );
+  });
+}