public async Task UnsubscribeFromTopicAsync() { var handler = new MockMessageHandler() { Response = @"{""results"":[{}]}", }; var factory = new MockHttpClientFactory(handler); var client = new InstanceIdClient(factory, MockCredential); var result = await client.UnsubscribeFromTopicAsync("test-topic", new List <string> { "abc123" }); Assert.Equal(1, result.SuccessCount); }