public void EventSourceSetup_HigherSeverity()
{
// get default sink using reflection
var defaultLogger = OtelLogging.GetLogger();
var sinkField = defaultLogger.GetType().GetField("_sink", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);
var defaultSink = (ISink)sinkField.GetValue(defaultLogger);
try
{
var testSink = new TestSink();
var listener = new SdkSelfDiagnosticsEventListener(EventLevel.Verbose);
// override default logger's sink with test sink
sinkField.SetValue(defaultLogger, testSink);
// Emitting a Verbose event. Or any EventSource event with lower severity than Error.
AspNetTelemetryEventSource.Log.ActivityRestored("123");
OpenTelemetrySdkEventSource.Log.ActivityStarted("Activity started", "1");
testSink.Messages.Should().Contain(msg => msg.Contains("EventSource=OpenTelemetry-Instrumentation-AspNet-Telemetry, Message=Activity restored, Id='123'"));
testSink.Messages.Should().Contain(msg => msg.Contains("EventSource=OpenTelemetry-Sdk, Message=Activity started."));
}
finally
{
// restore default sink
sinkField.SetValue(defaultLogger, defaultSink);
}
}
public void EventSourceSetup_LowerSeverity()
{
// get default sink using reflection
var defaultLogger = OtelLogging.GetLogger();
var sinkField = defaultLogger.GetType().GetField("_sink", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);
var defaultSink = (ISink)sinkField.GetValue(defaultLogger);
try
{
var testSink = new TestSink();
var listener = new SdkSelfDiagnosticsEventListener(EventLevel.Error);
// override default logger's sink with test sink
sinkField.SetValue(defaultLogger, testSink);
// Emitting a Verbose event. Or any EventSource event with lower severity than Error.
AspNetTelemetryEventSource.Log.ActivityRestored("123");
OpenTelemetrySdkEventSource.Log.ActivityStarted("Activity started", "1");
testSink.Messages.Should().BeEmpty("events with lower severity than error should not be written.");
}
finally
{
// restore default sink
sinkField.SetValue(defaultLogger, defaultSink);
}
}
