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package kamon.trace.logging
import kamon.testkit.BaseKamonSpec
import kamon.trace.{ EmptyTraceContext, Tracer }
import org.slf4j.MDC
class MdcKeysSupportSpec extends BaseKamonSpec("mdc-keys-support-spec") {
"Running code with MDC support" should {
"add nothing to the MDC" when {
"the trace context is empty" in {
// Given an empty trace context.
Tracer.withContext(EmptyTraceContext) {
// When some code is executed with MDC support.
MdcKeysSupport.withMdc {
// Then the MDC should not contain the trace token.
Option(MDC.get(MdcKeysSupport.traceTokenKey)) should be(None)
// Or name
Option(MDC.get(MdcKeysSupport.traceNameKey)) should be(None)
}
}
}
}
"add the trace token and name to the context" when {
"the trace context is not empty" in {
// Given a trace context.
Tracer.withNewContext("name", Some("token")) {
// When some code is executed with MDC support.
MdcKeysSupport.withMdc {
// Then the MDC should contain the trace token.
Option(MDC.get(MdcKeysSupport.traceTokenKey)) should be(Some("token"))
// And name
Option(MDC.get(MdcKeysSupport.traceNameKey)) should be(Some("name"))
}
// Then after code is executed the MDC should have been cleared.
Option(MDC.get(MdcKeysSupport.traceTokenKey)) should be(None)
Option(MDC.get(MdcKeysSupport.traceNameKey)) should be(None)
}
}
}
}
}
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