LimitRate: add tests

Author: xr0master

test/utils/is_limit_rate_hit_test.dart

@@ -0,0 +1,68 @@
+import 'package:emailjs/src/models/default_storage.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+import 'package:emailjs/emailjs.dart';
+import 'package:emailjs/src/utils/is_limit_rate_hit.dart';
+
+void main() {
+  setUp(() async {
+    final Map<String, Object> values = <String, Object>{};
+    SharedPreferences.setMockInitialValues(values);
+  });
+
+  group('limit rate is disabled', () {
+    test('empty limit rate options', () async {
+      DefaultStorage storage = DefaultStorage();
+      const limitRate = LimitRate();
+
+      expect(await isLimitRateHit(limitRate, storage), false);
+    });
+
+    test('throttle is 0', () async {
+      DefaultStorage storage = DefaultStorage();
+      const limitRate = LimitRate(throttle: 0);
+
+      expect(await isLimitRateHit(limitRate, storage), false);
+    });
+
+    test('no record', () async {
+      DefaultStorage storage = DefaultStorage();
+      const limitRate = LimitRate(throttle: 1000, id: 'app');
+
+      expect(await isLimitRateHit(limitRate, storage), false);
+    });
+
+    test('no hit limit', () async {
+      DefaultStorage storage = DefaultStorage();
+      const limitRate = LimitRate(throttle: 100, id: 'app');
+
+      expect(await isLimitRateHit(limitRate, storage), false);
+
+      await Future.delayed(const Duration(milliseconds: 150));
+
+      expect(await isLimitRateHit(limitRate, storage), false);
+    });
+
+    test('not same page or ID', () async {
+      DefaultStorage storage = DefaultStorage();
+      LimitRate limitRate = const LimitRate(throttle: 100, id: 'app');
+
+      expect(await isLimitRateHit(limitRate, storage), false);
+
+      limitRate = const LimitRate(throttle: 100, id: 'new-app');
+      
+      expect(await isLimitRateHit(limitRate, storage), false);
+    });
+  });
+
+  group('limit rate is enabled', () {
+    test('hit limit', () async {
+      DefaultStorage storage = DefaultStorage();
+      const limitRate = LimitRate(throttle: 100, id: 'app');
+
+      expect(await isLimitRateHit(limitRate, storage), false);
+      expect(await isLimitRateHit(limitRate, storage), true);
+    });
+  });
+}