public void WriteTrace_works()
{
string result = null;
var handler = new OperationLogHandler(writeTrace: m => result = m);
var message = "Princess Celestia is an alicorn.";
handler.WriteTrace(message);
Assert.Equal(message, result);
}
public void Write_methods_are_noops_when_null()
{
var handler = new OperationLogHandler();
handler.WriteError("Princess Celestia does not exist.");
handler.WriteWarning("Princess Celestia is in danger.");
handler.WriteInformation("Princess Celestia is on her way.");
handler.WriteDebug("Princess Celestia is a princess.");
handler.WriteTrace("Princess Celestia is an alicorn.");
}