public void On_methods_are_noops_when_null()
{
var handler = new OperationReportHandler();
handler.OnWarning("Princess Celestia is in danger.");
handler.OnInformation("Princess Celestia is on her way.");
handler.OnVerbose("Princess Celestia is an alicorn.");
}
public void OnVerbose_works()
{
string result = null;
var handler = new OperationReportHandler(verboseHandler: m => result = m);
var message = "Princess Celestia is an alicorn.";
handler.OnVerbose(message);
Assert.Equal(message, result);
}