public void buggy_handlers_are_removed_and_their_errors_are_caught()
{
CriticalErrorCollector c = new CriticalErrorCollector();
int buggyEventHandlerCount = 0;
var goodCollector = new List <string>();
Action <CriticalErrorCollector.ErrorEventArgs> addMsg = errorEvent =>
{
lock ( goodCollector )
{
foreach (var e in errorEvent.Errors)
{
goodCollector.Add(e.Exception.Message);
}
}
};
var hGood = new EventHandler <CriticalErrorCollector.ErrorEventArgs>((sender, e) => addMsg(e));
var hBad = new EventHandler <CriticalErrorCollector.ErrorEventArgs>((sender, e) => { ++buggyEventHandlerCount; throw new Exception("From buggy handler."); });
c.OnErrorFromBackgroundThreads += hGood;
c.OnErrorFromBackgroundThreads += hBad;
try
{
c.Add(new Exception("The-Test-Exception-Message"), "First call");
c.WaitOnErrorFromBackgroundThreadsPending();
buggyEventHandlerCount.Should().Be(1);
goodCollector.Count.Should().Be(2, "We also received the error of the buggy handler :-).");
if (goodCollector.Count != 2)
{
// Forces the display of the messages.
string.Join(Environment.NewLine + "-" + Environment.NewLine, goodCollector)
.Should().Be("Only 2 messages should have been received.");
}
c.Add(new Exception("The-Test-Exception-Message"), "Second call");
c.WaitOnErrorFromBackgroundThreadsPending();
goodCollector.Count.Should().Be(3);
buggyEventHandlerCount.Should().Be(1);
}
finally
{
c.OnErrorFromBackgroundThreads -= hGood;
c.OnErrorFromBackgroundThreads -= hBad;
}
}
public void catching_one_event()
{
CriticalErrorCollector c = new CriticalErrorCollector();
CriticalErrorCollector.ErrorEventArgs catched = null;
EventHandler <CriticalErrorCollector.ErrorEventArgs> h = (sender, e) => catched = e;
c.OnErrorFromBackgroundThreads += h;
try
{
c.Add(new Exception("The-Test-Exception-Message"), "Produced by SimpleTest");
c.WaitOnErrorFromBackgroundThreadsPending();
catched.Should().NotBeNull();
catched.Errors.Should().HaveCount(1);
catched.Errors[0].Exception.Message.Should().Contain("The-Test-Exception-Message");
catched.Errors[0].Comment.Should().Contain("Produced by SimpleTest");
}
finally
{
c.OnErrorFromBackgroundThreads -= h;
}
}
