public void GetSupportedContentTypes(string actualContentType, string expectedContentType)
        {
            IApiRequestFormatMetadataProvider apiRequestFormatMetadataProvider = new CborInputFormatter(null);
            IReadOnlyList <string>            contentTypes
                = apiRequestFormatMetadataProvider.GetSupportedContentTypes(
                      actualContentType, typeof(object));

            if (string.IsNullOrEmpty(expectedContentType))
            {
                Assert.Null(contentTypes);
            }
            else
            {
                Assert.Equal(1, contentTypes.Count);
                Assert.Equal(expectedContentType, contentTypes[0]);
            }
        }