public void TraceWriter_IFormatProvider(Func <ILogger, string, TraceLevel> loggerAction)
{
string message = "Hello, World!";
// Need to explicity define lowest level.
LoggerConfiguration loggerConfiguration = new LoggerConfiguration().MinimumLevel.Verbose();
InMemoryTraceWriter traceWriter = new InMemoryTraceWriter(TraceLevel.Verbose);
loggerConfiguration = loggerConfiguration.WriteTo.TraceWriter(traceWriter, "{Message}");
ILogger logger = loggerConfiguration.CreateLogger();
Assert.Equal(0, traceWriter.Events.Count);
TraceLevel expectedTraceLevel = loggerAction(logger, message);
Assert.Equal(1, traceWriter.Events.Count);
TraceEvent traceEvent = traceWriter.Events.First();
Assert.Equal(message, traceEvent.Message);
Assert.Equal(expectedTraceLevel, traceEvent.Level);
}
