test DefaultStorage model

Author: xr0master

test/models/default_storage_test.dart

@@ -0,0 +1,29 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+import 'package:emailjs/src/models/default_storage.dart';
+
+void main() {
+  setUpAll(() async {
+    final Map<String, Object> values = <String, Object>{'test': 100};
+    SharedPreferences.setMockInitialValues(values);
+  });
+
+  test('get value', () async {
+    DefaultStorage storage = DefaultStorage();
+    final value = await storage.get('test');
+    expect(value, 100);
+  });
+
+  test('remove value', () async {
+    DefaultStorage storage = DefaultStorage();
+    await storage.remove('test');
+    expect(await storage.get('test'), null);
+  });
+
+  test('set value', () async {
+    DefaultStorage storage = DefaultStorage();
+    await storage.set('test', 500);
+    expect(await storage.get('test'), 500);
+  });
+}