Box.V2.Test.BoxCollectionsManagerTest.GetCollections_ValidResponse C# (CSharp) Method

        public async Task GetCollections_ValidResponse()
        {
            /*** Arrange ***/
            string responseString = @"{
                                            ""total_count"": 1,
                                            ""entries"": [
                                                {
                                                    ""type"": ""collection"",
                                                    ""id"": ""405151"",
                                                    ""name"": ""Favorites"",
                                                    ""collection_type"": ""favorites""
                                                }
                                            ],
                                            ""limit"": 100,
                                            ""offset"": 0
                                        }";
            IBoxRequest boxRequest = null;
            Uri collectionUri = new Uri(Constants.CollectionsEndpointString);
            _config.SetupGet(x => x.CollectionsEndpointUri).Returns(collectionUri);
            _handler.Setup(h => h.ExecuteAsync<BoxCollection<BoxCollectionItem>>(It.IsAny<IBoxRequest>()))
                .Returns(Task.FromResult<IBoxResponse<BoxCollection<BoxCollectionItem>>>(new BoxResponse<BoxCollection<BoxCollectionItem>>()
                {
                    Status = ResponseStatus.Success,
                    ContentString = responseString
                }))
                .Callback<IBoxRequest>(r => boxRequest = r);

            /*** Act ***/

            BoxCollection<BoxCollectionItem> result = await _collectionsManager.GetCollectionsAsync();

            /*** Assert ***/

            //Request check
            Assert.IsNotNull(boxRequest);
            Assert.AreEqual(RequestMethod.Get, boxRequest.Method);
            Assert.AreEqual(collectionUri, boxRequest.AbsoluteUri.AbsoluteUri);

            //Response check
            Assert.AreEqual(1, result.TotalCount);
            Assert.IsNotNull(result.Entries);
            Assert.AreEqual(1, result.Entries.Count);
            Assert.AreEqual("collection", result.Entries[0].Type);
            Assert.AreEqual("405151", result.Entries[0].Id);
            Assert.AreEqual("Favorites", result.Entries[0].Name);
            Assert.AreEqual("favorites", result.Entries[0].CollectionType);
            Assert.AreEqual(100, result.Limit);
            Assert.AreEqual(0, result.Offset);

        }