public void BeginningTheScopeAddsTheListenerToTheSource_EndingTheScopeRemovesTheListenerFromTheSource()
{
CheckThatSourceDoesNotContainTheListener();
IDisposable defaultScope = DataBindingTraceListener.BeginScope();
CheckThatSourceContainsTheListener();
IDisposable customScope = DataBindingTraceListener.BeginScope(Handle);
CheckThatSourceContainsTheListener();
customScope.Dispose();
CheckThatSourceContainsTheListener();
defaultScope.Dispose();
CheckThatSourceDoesNotContainTheListener();
public void TraceEventOnSourceCallsTraceEventOfListener_WhichCallsWriteViaWriteHeaderAndWriteLineOfListener()
{
string?actualMessage = null;
using (DataBindingTraceListener.BeginScope(m => actualMessage = m))
{
string header = "System.Windows.Data Error: 2 : ";
string expectedMessage = header + "Format" + Environment.NewLine;
PresentationTraceSources.DataBindingSource.TraceEvent(TraceEventType.Error, 2, "Format", Array.Empty <object>());
Assert.Null(actualMessage);
PresentationTraceSources.DataBindingSource.Flush();
Assert.Equal(expectedMessage, actualMessage);
}
}
