public void WhenTheFilterExpressionIsModifiedTheFilterChanges()
{
var @switch = new LoggingFilterSwitch();
var sink = new CollectingSink();
var log = new LoggerConfiguration()
.Filter.ControlledBy(@switch)
.WriteTo.Sink(sink)
.CreateLogger();
var v11 = Some.InformationEvent("Adding {Volume} L", 11);
log.Write(v11);
Assert.Same(v11, sink.SingleEvent);
sink.Events.Clear();
@switch.Expression = "Volume > 12";
log.Write(v11);
Assert.Equal(0, sink.Events.Count);
@switch.Expression = "Volume > 10";
log.Write(v11);
Assert.Same(v11, sink.SingleEvent);
sink.Events.Clear();
@switch.Expression = null;
log.Write(v11);
Assert.Same(v11, sink.SingleEvent);
}
/// <summary>
/// Use a <see cref="LoggingFilterSwitch"/> to dynamically control filtering.
/// </summary>
/// <param name="loggerFilterConfiguration">Filter configuration.</param>
/// <param name="switch">A <see cref="LoggingFilterSwitch"/> that can be used to dynamically control
/// log filtering.</param>
/// <returns>The underlying <see cref="LoggerConfiguration"/>.</returns>
public static LoggerConfiguration ControlledBy(this LoggerFilterConfiguration loggerFilterConfiguration, LoggingFilterSwitch @switch)
{
if (loggerFilterConfiguration == null)
{
throw new ArgumentNullException(nameof(loggerFilterConfiguration));
}
if (@switch == null)
{
throw new ArgumentNullException(nameof(@switch));
}
return(loggerFilterConfiguration.With(@switch));
}
