public void AssertJsonSerializer()
{
string connectionString = "AccountEndpoint=https://localtestcosmos.documents.azure.com:443/;AccountKey=425Mcv8CXQqzRNCgFNjIhT424GK99CKJvASowTnq15Vt8LeahXTcN5wt3342vQ==;";
var cosmosClientBuilder = new CosmosClientBuilder(connectionString);
var cosmosClient = cosmosClientBuilder.Build(new MockDocumentClient());
Assert.IsInstanceOfType(cosmosClient.ClientOptions.CosmosSerializerWithWrapperOrDefault, typeof(CosmosJsonSerializerWrapper));
Assert.AreEqual(cosmosClient.ClientOptions.CosmosSerializerWithWrapperOrDefault, cosmosClient.ClientOptions.PropertiesSerializer);
CosmosSerializer defaultSerializer = cosmosClient.ClientOptions.PropertiesSerializer;
CosmosSerializer mockJsonSerializer = new Mock <CosmosSerializer>().Object;
cosmosClientBuilder.WithCustomJsonSerializer(mockJsonSerializer);
var cosmosClientCustom = cosmosClientBuilder.Build(new MockDocumentClient());
Assert.AreEqual(defaultSerializer, cosmosClientCustom.ClientOptions.PropertiesSerializer);
Assert.AreEqual(mockJsonSerializer, cosmosClientCustom.ClientOptions.Serializer);
Assert.IsInstanceOfType(cosmosClientCustom.ClientOptions.CosmosSerializerWithWrapperOrDefault, typeof(CosmosJsonSerializerWrapper));
Assert.AreEqual(mockJsonSerializer, ((CosmosJsonSerializerWrapper)cosmosClientCustom.ClientOptions.CosmosSerializerWithWrapperOrDefault).InternalJsonSerializer);
}