Client test harness - Unit testing Flutter GraphQL

helpers.dart

MockGraphQLClient generateMockGraphQLClient() {
  final graphQLClient = MockGraphQLClient();
  final queryManager = MockQueryManager();

  when(() => graphQLClient.defaultPolicies).thenReturn(DefaultPolicies());
  when(() => graphQLClient.queryManager).thenReturn(queryManager);

  return graphQLClient;
}

class MockGraphQLClient extends Mock implements GraphQLClient {}

class MockQueryManager extends Mock implements QueryManager {}