fetch plugin list test

test/helpers/test_helpers.dart

@@ -250,19 +250,33 @@ GraphQLClient getAndRegisterGraphQLClient() {
   // Either fill this with mock data or override this stub
   // and return null
 
-  // when(service.query(QueryOptions(
-  //   document: gql(queries.getPluginsList()),
-  // ))).thenAnswer(
-  //   (realInvocation) async {
-  //     return QueryResult.internal(
-  //       source: QueryResultSource.network,
-  //       parserFn: (data) => {},
-  //       data: {
-  //         "getPlugins": [],
-  //       },
-  //     );
-  //   },
-  // );
+  when(service.query(any)).thenAnswer(
+    (realInvocation) async {
+      if (locator.isRegistered<GraphQLClient>()) {
+        return Future.value(
+          QueryResult<Map<String, dynamic>>(
+            source: QueryResultSource.network,
+            data: {
+              "getPlugins": null,
+            },
+            options: QueryOptions(
+              document: gql(queries.getPluginsList()),
+            ),
+          ),
+        );
+      } else {
+        return Future.value(
+          QueryResult<Map<String, dynamic>>(
+            source: QueryResultSource.network,
+            data: null,
+            options: QueryOptions(
+              document: gql(queries.getPluginsList()),
+            ),
+          ),
+        );
+      }
+    },
+  );
 
   when(service.defaultPolicies).thenAnswer(
     (realInvocation) => DefaultPolicies(),

test/plugins/fetch_plugin_list_test.dart

@@ -0,0 +1,86 @@
+import 'dart:io';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:graphql_flutter/graphql_flutter.dart';
+import 'package:hive/hive.dart';
+import 'package:mockito/mockito.dart';
+import 'package:talawa/plugins/fetch_plugin_list.dart';
+import 'package:talawa/services/graphql_config.dart';
+
+import '../helpers/test_helpers.dart';
+import '../helpers/test_locator.dart';
+
+/// Tests fetch_plugin_list.dart.
+///
+/// more_info_if_required
+///
+/// **params**:
+///   None
+///
+/// **returns**:
+///   None
+void main() async {
+  testSetupLocator();
+  locator<GraphqlConfig>().test();
+  late FetchPluginList fetchPluginList;
+
+  final Directory dir = await Directory.systemTemp.createTemp('talawa_test');
+  Hive.init(dir.path);
+  await Hive.openBox('pluginBox');
+
+  setUp(() {
+    registerServices();
+    locator.allowReassignment = true;
+
+    locator.registerLazySingleton<FetchPluginList>(() => FetchPluginList());
+    fetchPluginList = locator<FetchPluginList>();
+  });
+  group('FetchPluginList', () {
+    test('fetchList should fetch plugins and store them in Hive', () async {
+      final queryResult = QueryResult(
+        data: {
+          'getPlugins': [
+            {
+              '_id': '1',
+              'pluginName': 'Plugin 1',
+              'pluginCreatedBy': 'User A',
+              'pluginDesc': 'Description A',
+              'pluginInstallStatus': true,
+              'installedOrgs': ['Org A'],
+            },
+          ],
+        },
+        options: QueryOptions(
+          document: gql(queries.getPluginsList()),
+        ),
+        source: QueryResultSource.network,
+      );
+
+      when(locator<GraphqlConfig>().clientToQuery()).thenAnswer(
+        (_) => locator<GraphQLClient>(),
+      );
+      when(
+        locator<GraphQLClient>().query(
+          QueryOptions(
+            document: gql(queries.getPluginsList()),
+          ),
+        ),
+      ).thenAnswer((_) async => queryResult);
+      await fetchPluginList.fetchList();
+
+      verify(locator<GraphqlConfig>().clientToQuery()).called(2);
+      verify(
+        locator<GraphQLClient>().query(
+          QueryOptions(
+            document: gql(queries.getPluginsList()),
+          ),
+        ),
+      ).called(2);
+
+      expect(fetchPluginList.box, isNotNull);
+      expect(
+        fetchPluginList.box.get('plugins'),
+        equals(queryResult.data!["getPlugins"]),
+      );
+    });
+  });
+}