Create parse_local_storage_test.dart

test/parse_local_storage_test.dart

@@ -0,0 +1,46 @@
+import 'package:flutter_parse/flutter_parse.dart';
+import 'package:flutter_parse/src/parse_local_storage.dart';
+import 'package:test/test.dart';
+
+void main() {
+  group('Parse Local Storage', () {
+    setUpAll(() {
+      final ParseConfiguration _configuration = ParseConfiguration(
+        server: 'SERVER',
+        applicationId: 'APPLICATION_ID',
+        clientKey: 'CLIENT_KEY',
+        enableLogging: true,
+      );
+      Parse.initialize(_configuration);
+    });
+
+    const String key1 = 'default local storage must be empty';
+    test(key1, () async {
+      final localStorage = await parseLocalStorage.get(key1);
+
+      expect(localStorage.isEmpty, isTrue);
+    });
+
+    const String key2 = 'adding local storage with an item must not be empty';
+    test(key2, () async {
+      final localStorage = await parseLocalStorage.get(key2);
+      await localStorage.setItem('first', 1);
+
+      expect(localStorage.isEmpty, isFalse);
+      expect(localStorage.getItem('first'), 1);
+    });
+
+    const String key3 =
+        'remove after adding local storage with an item must be empty';
+    test(key3, () async {
+      final localStorage = await parseLocalStorage.get(key3);
+      await localStorage.setItem('second', 2);
+
+      expect(localStorage.isEmpty, isFalse);
+      expect(localStorage.getItem('second'), 2);
+
+      await localStorage.delete();
+      expect(localStorage.isEmpty, isTrue);
+    });
+  });
+}