Verify case-insensitive TextMapGetters (open-telemetry#4847)

* Verify case-insensitive TextMapGetters

* Separate test

testing-common/src/main/groovy/io/opentelemetry/instrumentation/test/base/HttpServerTest.groovy

@@ -291,8 +291,31 @@ abstract class HttpServerTest<SERVER> extends InstrumentationSpecification imple
  def traceId = "00000000000000000000000000000123"
  def parentId = "0000000000000456"
  def request = AggregatedHttpRequest.of(
+ // intentionally sending mixed-case "tracePARENT" to make sure that TextMapGetters are not case-sensitive
  request(SUCCESS, method).headers().toBuilder()
- .set("traceparent", "00-" + traceId.toString() + "-" + parentId.toString() + "-01")
+ .set("tracePARENT", "00-" + traceId.toString() + "-" + parentId.toString() + "-01")
+ .build())
+ def response = client.execute(request).aggregate().join()
+
+ expect:
+ response.status().code() == SUCCESS.status
+ response.contentUtf8() == SUCCESS.body
+
+ and:
+ assertTheTraces(1, traceId, parentId, "GET", SUCCESS, null, response)
+
+ where:
+ method = "GET"
+ }
+
+ // make sure that TextMapGetters are not case-sensitive
+ def "test success with uppercase TRACEPARENT header"() {
+ setup:
+ def traceId = "00000000000000000000000000000123"
+ def parentId = "0000000000000456"
+ def request = AggregatedHttpRequest.of(
+ request(SUCCESS, method).headers().toBuilder()
+ .set("TRACEPARENT", "00-" + traceId.toString() + "-" + parentId.toString() + "-01")
  .build())
  def response = client.execute(request).aggregate().join()