public void ExtractHeaderTags_MatchesCaseInsensitive()
{
// HttpRequestHeaders setup
var request = new HttpRequestMessage();
var headers = new ReflectionHttpHeadersCollection(request.Headers);
// Initialize constants
const string customHeader1Name = "dd-custom-header1";
const string customHeader1Value = "match1";
const string customHeader1TagName = "custom-header1-tag";
const string customHeader2Name = "DD-CUSTOM-HEADER-MISMATCHING-CASE";
const string customHeader2Value = "match2";
const string customHeader2TagName = "custom-header2-tag";
string customHeader2LowercaseHeaderName = customHeader2Name.ToLowerInvariant();
// Initialize WebRequest and add headers
headers.Add(customHeader1Name, customHeader1Value);
headers.Add(customHeader2Name, customHeader2Value);
// Initialize header tag arguments
var headerToTagMap = new Dictionary <string, string>();
headerToTagMap.Add(customHeader1Name, customHeader1TagName);
headerToTagMap.Add(customHeader2LowercaseHeaderName, customHeader2TagName);
// Set expectations
var expectedResults = new Dictionary <string, string>();
expectedResults.Add(customHeader1TagName, customHeader1Value);
expectedResults.Add(customHeader2TagName, customHeader2Value);
// Test
var tagsFromHeader = SpanContextPropagator.Instance.ExtractHeaderTags(headers, headerToTagMap);
// Assert
Assert.NotNull(tagsFromHeader);
Assert.Equal(expectedResults, tagsFromHeader);
}
