#39 - Write tests

Author: astrutz

lib/main.dart

@@ -1,24 +1,15 @@
 import 'package:flutter/material.dart';
-import 'package:google_fonts/google_fonts.dart';
+import 'themes/theme.dart';
 import 'screens/mainMenu.dart';
 
 void main() => runApp(_App());
 
 class _App extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
-    final textTheme = Theme.of(context).textTheme;
     return MaterialApp(
       home: MainMenuScreen(),
-      theme: ThemeData(
-        primaryColor: Colors.green[800],
-        colorScheme: Theme.of(context).colorScheme.copyWith(
-              primary: Color(0xFF2E7D32),
-              onPrimary: Color(0xFFFFFFFF),
-              primaryVariant: Color(0xFF005005),
-            ),
-        textTheme: GoogleFonts.rubikTextTheme(textTheme),
-      ),
+      theme: appTheme(context),
     );
   }
 }

lib/themes/theme.dart

@@ -0,0 +1,15 @@
+import 'package:flutter/material.dart';
+import 'package:google_fonts/google_fonts.dart';
+
+ThemeData appTheme(context) {
+  final textTheme = Theme.of(context).textTheme;
+  return ThemeData(
+    primaryColor: Colors.green[800],
+    colorScheme: Theme.of(context).colorScheme.copyWith(
+          primary: Colors.green[800],
+          onPrimary: Color(0xFFFFFFFF),
+          primaryVariant: Colors.green[900],
+        ),
+    textTheme: GoogleFonts.rubikTextTheme(textTheme),
+  );
+}

test/components/menuButton_test.dart

@@ -1 +1,38 @@
-void main() {}
+import 'package:dartsdrill/components/menuButton.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+void main() {
+  group('Widget', () {
+    testWidgets('MenuButton without onpressed should be disabled', (WidgetTester tester) async {
+      Widget testWidget = new MediaQuery(
+        data: new MediaQueryData(),
+        child: new MaterialApp(
+          home: new MenuButton(
+            buttonText: 'title',
+            icon: Icons.calendar_today_rounded,
+          ),
+        ),
+      );
+      await tester.pumpWidget(testWidget);
+      final elevatedButtonFinder = find.byWidgetPredicate((widget) => widget is ElevatedButton && widget.enabled == false);
+      expect(elevatedButtonFinder, findsOneWidget);
+    });
+
+    testWidgets('MenuButton with onpressed should be enabled', (WidgetTester tester) async {
+      Widget testWidget = new MediaQuery(
+        data: new MediaQueryData(),
+        child: new MaterialApp(
+          home: new MenuButton(
+            buttonText: 'title',
+            onPressed: () => {},
+            icon: Icons.calendar_today_rounded,
+          ),
+        ),
+      );
+      await tester.pumpWidget(testWidget);
+      final elevatedButtonFinder = find.byWidgetPredicate((widget) => widget is ElevatedButton && widget.enabled == true);
+      expect(elevatedButtonFinder, findsOneWidget);
+    });
+  });
+}

test/screens/mainMenu_test.dart

@@ -1,7 +1,41 @@
+import 'package:dartsdrill/components/menuButton.dart';
+import 'package:dartsdrill/screens/mainMenu.dart';
+import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 
 void main() {
-  test('One should be one', () {
-    expect(1, 1);
+  group('Unit', () {
+    final mainMenu = MainMenuScreen();
+    final screens = mainMenu.getScreens();
+    test('MainMenu should have screens to show', () {
+      expect(mainMenu.getScreens().length, greaterThanOrEqualTo(1));
+    });
+
+    test('MainMenu should have screens with titles', () {
+      final hasTitles = screens.every((screen) => screen.containsKey('title'));
+      expect(hasTitles, true);
+    });
+
+    test('MainMenu should have screens with icons', () {
+      final hasIcons = screens.every((screen) => screen.containsKey('icon'));
+      expect(hasIcons, true);
+    });
+  });
+
+  group('Widget', () {
+    testWidgets('MainMenu should have MenuButtons', (WidgetTester tester) async {
+      Widget testWidget = new MediaQuery(data: new MediaQueryData(), child: new MaterialApp(home: new MainMenuScreen()));
+      await tester.pumpWidget(testWidget);
+      final menuButtonFinder = find.byWidgetPredicate((widget) => widget is MenuButton);
+      expect(menuButtonFinder, findsWidgets);
+    });
+
+    testWidgets('MainMenu should have as much buttons as screens', (WidgetTester tester) async {
+      Widget testWidget = new MediaQuery(data: new MediaQueryData(), child: new MaterialApp(home: new MainMenuScreen()));
+      await tester.pumpWidget(testWidget);
+      final mainMenu = MainMenuScreen();
+      final menuButtonFinder = find.byWidgetPredicate((widget) => widget is MenuButton);
+      expect(menuButtonFinder, findsNWidgets(mainMenu.getScreens().length));
+    });
   });
 }