public void ConstructorThrowsWithInvalidStringComparison(string headerName, string headerValue, MediaTypeHeaderValue mediaType)
        {
            int invalidValue = 999;

            Assert.ThrowsInvalidEnumArgument(() => new RequestHeaderMapping(headerName, headerValue, (StringComparison)invalidValue, false, mediaType),
                                             "valueComparison", invalidValue, typeof(StringComparison));
        }