public void When_asserting_that_an_event_was_not_raised_and_it_doesnt_exist_it_should_throw()
{
// Arrange
var subject = new EventRaisingClass();
using var monitor = subject.Monitor();
// Act
Action act = () => monitor.Should().NotRaise("NonExistingEvent");
// Assert
act.Should().Throw <InvalidOperationException>().WithMessage(
"Not monitoring any events named \"NonExistingEvent\".");
}
public void When_the_event_sender_is_the_expected_object_it_should_not_throw()
{
// Arrange
var subject = new EventRaisingClass();
using var monitor = subject.Monitor();
subject.RaiseEventWithSender();
// Act
Action act = () => monitor.Should().Raise("PropertyChanged").WithSender(subject);
// Assert
act.Should().NotThrow();
}
public void When_a_monitored_class_event_has_fired_it_should_be_possible_to_reset_the_event_monitor()
{
// Arrange
var subject = new EventRaisingClass();
using var eventMonitor = subject.Monitor();
subject.RaiseEventWithSenderAndPropertyName("SomeProperty");
// Act
eventMonitor.Clear();
// Assert
eventMonitor.Should().NotRaise("PropertyChanged");
}
public void When_a_property_changed_event_for_another_than_the_unexpected_property_was_raised_it_should_not_throw()
{
// Arrange
var subject = new EventRaisingClass();
using var monitor = subject.Monitor();
subject.RaiseEventWithSenderAndPropertyName("SomeOtherProperty");
// Act
Action act = () => monitor.Should().NotRaisePropertyChangeFor(x => x.SomeProperty);
// Assert
act.Should().NotThrow();
}
public void When_an_expected_property_changed_event_was_raised_for_all_properties_it_should_not_throw()
{
// Arrange
var subject = new EventRaisingClass();
using var monitor = subject.Monitor();
subject.RaiseEventWithSenderAndPropertyName(null);
// Act
Action act = () => monitor.Should().RaisePropertyChangeFor(null);
// Assert
act.Should().NotThrow();
}
public void When_asserting_an_event_that_doesnt_exist_it_should_throw()
{
// Arrange
var subject = new EventRaisingClass();
using var monitoredSubject = subject.Monitor();
// Act
// ReSharper disable once AccessToDisposedClosure
Action act = () => monitoredSubject.Should().Raise("NonExistingEvent");
// Assert
act.Should().Throw <InvalidOperationException>().WithMessage(
"Not monitoring any events named \"NonExistingEvent\".");
}
public void When_a_property_changed_event_for_a_specific_property_was_not_raised_it_should_throw()
{
// Arrange
var subject = new EventRaisingClass();
using var monitor = subject.Monitor();
// Act
Action act = () => monitor.Should().RaisePropertyChangeFor(x => x.SomeProperty, "the property was changed");
// Assert
act.Should().Throw <XunitException>().WithMessage(
"Expected object " + Formatter.ToString(subject) +
" to raise event \"PropertyChanged\" for property \"SomeProperty\" because the property was changed, but it did not*");
}
public void TestUnsubscription_Simple()
{
EventRaisingClass observed = new EventRaisingClass();
_eventRaised = false;
var handler = new WeakEventHandler <EventArgs>(GetCallback(), h => observed.Event -= h);
observed.Event += handler.Handler;
Assert.AreEqual(1, observed.SubscriptionCount);
// unregistration should detach event
observed.Event -= handler.Handler;
Assert.AreEqual(0, observed.SubscriptionCount);
Assert.IsFalse(_eventRaised);
}
public void When_an_event_was_not_raised_it_should_throw_and_use_the_reason()
{
// Arrange
var subject = new EventRaisingClass();
using var monitor = subject.Monitor();
// Act
Action act = () => monitor.Should().Raise("PropertyChanged", "{0} should cause the event to get raised", "Foo()");
// Assert
act.Should().Throw <XunitException>().WithMessage(
"Expected object " + Formatter.ToString(subject) +
" to raise event \"PropertyChanged\" because Foo() should cause the event to get raised, but it did not.");
}
public void When_monitoring_an_object_with_invalid_property_expression_it_should_throw()
{
// Arrange
var eventSource = new EventRaisingClass();
using var monitor = eventSource.Monitor();
Func <EventRaisingClass, int> func = e => e.SomeOtherProperty;
// Act
Action act = () => monitor.Should().RaisePropertyChangeFor(e => func(e));
// Assert
act.Should().Throw <ArgumentException>()
.WithParameterName("expression");
}
public void When_nesting_monitoring_requests_scopes_should_be_isolated()
{
// Arrange
var eventSource = new EventRaisingClass();
using (var outerScope = eventSource.Monitor())
{
// Act
using (var innerScope = eventSource.Monitor())
{
// Assert
((object)innerScope).Should().NotBeSameAs(outerScope);
}
}
}
public void When_the_event_sender_is_not_the_expected_object_it_should_throw()
{
// Arrange
var subject = new EventRaisingClass();
using var monitor = subject.Monitor();
subject.RaiseEventWithoutSender();
// Act
Action act = () => monitor.Should().Raise("PropertyChanged").WithSender(subject);
// Assert
act.Should().Throw <XunitException>()
.WithMessage($"Expected sender {Formatter.ToString(subject)}, but found {{<null>}}.");
}
public void When_a_property_agnostic_property_changed_event_for_was_not_raised_it_should_throw()
{
// Arrange
var subject = new EventRaisingClass();
using var monitor = subject.Monitor();
// Act
Action act = () => monitor.Should().RaisePropertyChangeFor(null);
// Assert
act.Should().Throw <XunitException>().WithMessage(
"Expected object " + Formatter.ToString(subject) +
" to raise event \"PropertyChanged\" for property <null>, but it did not*");
}
public void TestSubscription_Simple()
{
// subscription should not occur until handler is registered
EventRaisingClass observed = new EventRaisingClass();
Assert.AreEqual(0, observed.SubscriptionCount);
_eventRaised = false;
observed.Event += new WeakEventHandler <EventArgs>(GetCallback()).Handler;
// subscription should have occurred
Assert.AreEqual(1, observed.SubscriptionCount);
observed.RaiseEvent(EventArgs.Empty);
Assert.IsTrue(_eventRaised);
}
public void When_a_predicate_based_parameter_assertion_expects_more_parameters_then_an_event_has_it_should_throw()
{
// Arrange
var subject = new EventRaisingClass();
using var monitor = subject.Monitor();
subject.RaiseNonConventionalEvent("first argument", 2, "third argument");
// Act
Action act = () => monitor
.Should().Raise(nameof(EventRaisingClass.NonConventionalEvent))
.WithArgs <string>(null, null, null, args => args == "fourth argument");
// Assert
act.Should().Throw <ArgumentException>().WithMessage("*4 parameters*String*, but*2*");
}
public void When_a_property_changed_event_for_an_unexpected_property_was_raised_it_should_throw()
{
// Arrange
var subject = new EventRaisingClass();
using var monitor = subject.Monitor();
subject.RaiseEventWithSenderAndPropertyName("SomeProperty");
// Act
Action act = () => monitor.Should().NotRaisePropertyChangeFor(x => x.SomeProperty, "nothing happened");
// Assert
act.Should().Throw <XunitException>().WithMessage(
"Did not expect object " + Formatter.ToString(subject) +
" to raise the \"PropertyChanged\" event for property \"SomeProperty\" because nothing happened, but it did.");
}
public void When_a_property_changed_event_was_raised_by_monitored_class_it_should_be_possible_to_reset_the_event_monitor()
{
// Arrange
var subject = new EventRaisingClass();
using (var eventMonitor = subject.Monitor())
{
subject.RaiseEventWithSenderAndPropertyName("SomeProperty");
// Act
eventMonitor.Clear();
// Assert
eventMonitor.Should().NotRaisePropertyChangeFor(e => e.SomeProperty);
}
}
public void When_a_non_conventional_event_with_many_specific_arguments_was_raised_it_should_not_throw()
{
// Arrange
var subject = new EventRaisingClass();
using var monitor = subject.Monitor();
subject.RaiseNonConventionalEvent("first argument", 2, "third argument");
// Act
Action act = () => monitor
.Should().Raise("NonConventionalEvent")
.WithArgs <string>(null, args => args == "third argument");
// Assert
act.Should().NotThrow();
}
public void When_the_expected_event_was_raised_it_should_not_throw()
{
// Arrange
var subject = new EventRaisingClass();
using (var monitor = subject.Monitor())
{
subject.RaiseEventWithoutSender();
// Act
Action act = () => monitor.Should().Raise("PropertyChanged");
// Assert
act.Should().NotThrow();
}
}
public void When_the_event_parameters_do_match_it_should_not_throw()
{
// Arrange
var subject = new EventRaisingClass();
using var monitor = subject.Monitor();
subject.RaiseEventWithSenderAndPropertyName("SomeProperty");
// Act
Action act = () => monitor
.Should().Raise("PropertyChanged")
.WithArgs <PropertyChangedEventArgs>(args => args.PropertyName == "SomeProperty");
// Assert
act.Should().NotThrow();
}
public void When_monitoring_a_null_object_it_should_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//----------------------------------------------------------------------------------------------------------
EventRaisingClass subject = null;
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action act = () => subject.MonitorEvents();
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
act.ShouldThrow <NullReferenceException>().WithMessage("Cannot monitor the events of a <null> object.");
}
public void When_injecting_a_null_predicate_into_WithArgs_it_should_throw()
{
// Arrange
var subject = new EventRaisingClass();
using var monitor = subject.Monitor();
subject.RaiseNonConventionalEvent("first argument", 2, "third argument");
// Act
Action act = () => monitor.Should()
.Raise("NonConventionalEvent")
.WithArgs <string>(predicate: null);
// Assert
act.Should().ThrowExactly <ArgumentNullException>()
.WithParameterName("predicate");
}
public void When_the_property_changed_event_was_raised_for_the_wrong_property_it_should_throw_and_include_the_actual_properties_raised()
{
// Arrange
var bar = new EventRaisingClass();
using var monitor = bar.Monitor();
bar.RaiseEventWithSenderAndPropertyName("OtherProperty1");
bar.RaiseEventWithSenderAndPropertyName("OtherProperty2");
bar.RaiseEventWithSenderAndPropertyName("OtherProperty2");
// Act
Action act = () => monitor.Should().RaisePropertyChangeFor(b => b.SomeProperty);
// Assert
act.Should().Throw <XunitException>()
.WithMessage("Expected*property*SomeProperty*but*OtherProperty1*OtherProperty2*");
}
public void When_a_non_conventional_event_with_a_specific_argument_was_not_raised_it_should_throw()
{
// Arrange
const int wrongArgument = 3;
var subject = new EventRaisingClass();
using var monitor = subject.Monitor();
subject.RaiseNonConventionalEvent("first argument", 2, "third argument");
// Act
Action act = () => monitor
.Should().Raise("NonConventionalEvent")
.WithArgs <int>(args => args == wrongArgument);
// Assert
act.Should().Throw <XunitException>().WithMessage(
"Expected at least one event with arguments matching (args == " + wrongArgument + "), but found none.");
}
public void When_the_event_args_are_of_a_different_type_it_should_throw()
{
// Arrange
var subject = new EventRaisingClass();
using var monitor = subject.Monitor();
subject.RaiseEventWithSenderAndPropertyName("SomeProperty");
// Act
Action act = () => monitor
.Should().Raise("PropertyChanged")
.WithArgs <CancelEventArgs>(args => args.Cancel);
// Assert
act
.Should().Throw <ArgumentException>()
.WithMessage("No argument of event PropertyChanged is of type *CancelEventArgs>*");
}
public void When_a_class_is_not_being_monitored_it_should_not_be_possible_to_get_a_recorder()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
var eventSource = new EventRaisingClass();
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action action = () => eventSource.GetRecorderForEvent("PropertyChanged");
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
action.ShouldThrow <InvalidOperationException>()
.WithMessage("*not being monitored*");
}
public void When_a_specific_sender_is_expected_it_should_return_only_relevant_events()
{
// Arrange
var observable = new EventRaisingClass();
using var monitor = observable.Monitor();
// Act
observable.RaiseEventWithSpecificSender(observable);
observable.RaiseEventWithSpecificSender(new object());
// Assert
var recording = monitor
.Should()
.Raise(nameof(observable.PropertyChanged))
.WithSender(observable);
recording.Should().ContainSingle().Which.Parameters.First().Should().BeSameAs(observable);
}
public void When_the_event_parameters_dont_match_it_should_throw()
{
// Arrange
var subject = new EventRaisingClass();
using var monitor = subject.Monitor();
subject.RaiseEventWithoutSender();
// Act
Action act = () => monitor
.Should().Raise("PropertyChanged")
.WithArgs <PropertyChangedEventArgs>(args => args.PropertyName == "SomeProperty");
// Assert
act
.Should().Throw <XunitException>()
.WithMessage(
"Expected at least one event with arguments matching (args.PropertyName == \"SomeProperty\"), but found none.");
}
public void When_asserting_an_event_that_doesnt_exist_it_should_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//----------------------------------------------------------------------------------------------------------
var subject = new EventRaisingClass();
subject.MonitorEvents();
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action act = () => subject.ShouldRaise("NonExistingEvent");
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
act.ShouldThrow<InvalidOperationException>().WithMessage(
"Type <" + subject.GetType().Name + "> does not expose an event named \"NonExistingEvent\".");
}
public void When_asserting_that_an_event_was_not_raised_and_the_object_is_not_monitored_it_should_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//----------------------------------------------------------------------------------------------------------
var subject = new EventRaisingClass();
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action act = () => subject.ShouldNotRaise("PropertyChanged");
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
act.ShouldThrow <InvalidOperationException>().WithMessage(
"Object <FluentAssertions.Specs.EventAssertionSpecs+EventRaisingClass> is not being monitored for events or has already been garbage collected. " +
"Use the MonitorEvents() extension method to start monitoring events.");
}
public void When_an_unexpected_event_was_not_raised_it_should_not_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//----------------------------------------------------------------------------------------------------------
var subject = new EventRaisingClass();
subject.MonitorEvents();
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action act = () => subject.ShouldNotRaise("PropertyChanged");
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
act.ShouldNotThrow();
}
public void When_asserting_that_an_event_was_not_raised_and_the_object_is_not_monitored_it_should_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//----------------------------------------------------------------------------------------------------------
var subject = new EventRaisingClass();
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action act = () => subject.ShouldNotRaise("PropertyChanged");
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
act.ShouldThrow<InvalidOperationException>().WithMessage(
"Object <FluentAssertions.Specs.EventAssertionSpecs+EventRaisingClass> is not being monitored for events or has already been garbage collected. " +
"Use the MonitorEvents() extension method to start monitoring events.");
}
public void When_a_property_changed_event_was_raised_for_the_right_property_it_should_not_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//----------------------------------------------------------------------------------------------------------
var subject = new EventRaisingClass();
subject.MonitorEvents();
subject.RaiseEventWithSenderAndPropertyName("SomeProperty");
subject.RaiseEventWithSenderAndPropertyName("SomeOtherProperty");
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action act = () => subject.ShouldRaisePropertyChangeFor(x => x.SomeProperty);
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
act.ShouldNotThrow();
}
public void When_a_property_changed_event_for_a_specific_property_was_not_raised_it_should_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//----------------------------------------------------------------------------------------------------------
var subject = new EventRaisingClass();
subject.MonitorEvents();
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action act = () => subject.ShouldRaisePropertyChangeFor(x => x.SomeProperty, "the property was changed");
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
act.ShouldThrow<AssertFailedException>()
.WithMessage(
"Expected object*EventRaisingClass*to raise event*PropertyChanged*for*SomeProperty*because the property was changed, but it did not.");
}
public void When_a_property_changed_event_for_a_specific_property_was_raised_but_without_sender_it_should_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//----------------------------------------------------------------------------------------------------------
var subject = new EventRaisingClass();
subject.MonitorEvents();
subject.RaiseEventWithoutSender();
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action act = () => subject
.ShouldRaisePropertyChangeFor(x => x.SomeProperty, "the property was changed")
.WithSender(subject);
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
act.ShouldThrow<AssertFailedException>()
.WithMessage("Expected sender*EventRaisingClass*, but found <null>.", ComparisonMode.Wildcard);
}
public void When_the_event_parameter_is_of_a_different_type_it_should_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//----------------------------------------------------------------------------------------------------------
var subject = new EventRaisingClass();
subject.MonitorEvents();
subject.RaiseEventWithSenderAndPropertyName("SomeProperty");
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action act = () => subject
.ShouldRaise("PropertyChanged")
.WithArgs<UnhandledExceptionEventArgs>(args => args.IsTerminating);
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
act
.ShouldThrow<ArgumentException>()
.WithMessage("No argument of event PropertyChanged is of type <System.UnhandledExceptionEventArgs>.");
}
public void When_the_event_parameters_do_match_it_should_not_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//----------------------------------------------------------------------------------------------------------
var subject = new EventRaisingClass();
subject.MonitorEvents();
subject.RaiseEventWithSenderAndPropertyName("SomeProperty");
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action act = () => subject
.ShouldRaise("PropertyChanged")
.WithArgs<PropertyChangedEventArgs>(args => args.PropertyName == "SomeProperty");
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
act.ShouldNotThrow();
}
public void When_a_property_changed_event_was_raised_by_monitored_class_it_should_be_possible_to_reset_the_event_monitor()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//----------------------------------------------------------------------------------------------------------
var subject = new EventRaisingClass();
var eventMonitor = subject.MonitorEvents();
subject.RaiseEventWithSenderAndPropertyName("SomeProperty");
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
eventMonitor.Reset();
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
subject.ShouldNotRaisePropertyChangeFor(e => e.SomeProperty);
}
public void When_the_event_parameters_dont_match_it_should_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//----------------------------------------------------------------------------------------------------------
var subject = new EventRaisingClass();
subject.MonitorEvents();
subject.RaiseEventWithoutSender();
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action act = () => subject
.ShouldRaise("PropertyChanged")
.WithArgs<PropertyChangedEventArgs>(args => args.PropertyName == "SomeProperty");
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
act
.ShouldThrow<AssertFailedException>()
.WithMessage(
"Expected at least one event with arguments matching (args.PropertyName == \"SomeProperty\"), but found none.");
}
public void When_a_class_is_not_being_monitored_it_should_not_be_possible_to_get_a_recorder()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
var eventSource = new EventRaisingClass();
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action action = () => eventSource.GetRecorderForEvent("PropertyChanged");
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
action.ShouldThrow<InvalidOperationException>()
.WithMessage("*not being monitored*");
}
public void When_a_monitored_class_in_not_referenced_anymore_it_should_be_garbage_collected_also_if_an_Event_passing_Sender_was_raised()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//----------------------------------------------------------------------------------------------------------
var subject = new EventRaisingClass();
var referenceToSubject = new WeakReference(subject);
subject.MonitorEvents();
subject.RaiseEventWithSender();
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
subject = null;
GC.Collect();
GC.WaitForPendingFinalizers();
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
referenceToSubject.IsAlive.Should().BeFalse();
}
public void When_trying_to_attach_to_notify_property_changed_should_not_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//----------------------------------------------------------------------------------------------------------
var subject = new EventRaisingClass();
var eventMonitor = subject.MonitorEvents();
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action act = () => eventMonitor.Attach(typeof(INotifyPropertyChanged));
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
act.ShouldNotThrow();
}
public void When_a_property_changed_event_for_an_unexpected_property_was_raised_it_should_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//----------------------------------------------------------------------------------------------------------
var subject = new EventRaisingClass();
subject.MonitorEvents();
subject.RaiseEventWithSenderAndPropertyName("SomeProperty");
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action act = () => subject.ShouldNotRaisePropertyChangeFor(x => x.SomeProperty, "nothing happened");
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
act.ShouldThrow<AssertFailedException>().WithMessage(
"Did not expect object " + Formatter.ToString(subject) +
" to raise the \"PropertyChanged\" event for property \"SomeProperty\" because nothing happened, but it did.");
}
public void When_running_in_parallel_it_should_not_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//----------------------------------------------------------------------------------------------------------
Action<int> action = _ =>
{
EventRaisingClass subject = new EventRaisingClass();
subject.MonitorEvents();
subject.RaiseEventWithSender();
subject.ShouldRaise("PropertyChanged");
};
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action act = () => Enumerable.Range(0, 1000)
.AsParallel()
.ForAll(action);
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
act.ShouldNotThrow();
}
public void When_no_recorder_exists_for_an_event_it_should_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
var eventSource = new EventRaisingClass();
var eventMonitor = eventSource.MonitorEvents();
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action action = () => eventMonitor.GetEventRecorder("SomeEvent");
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
action.ShouldThrow<InvalidOperationException>()
.WithMessage("Not monitoring any events named \"SomeEvent\".");
}
public void When_monitoring_class_requesting_to_monitor_again_should_return_same_monitor()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
var eventSource = new EventRaisingClass();
var eventMonitor = eventSource.MonitorEvents();
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
var newMonitor = eventSource.MonitorEvents();
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
newMonitor.Should().BeSameAs(eventMonitor);
}
public void When_an_expected_property_changed_event_was_raised_for_all_properties_it_should_not_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//----------------------------------------------------------------------------------------------------------
var subject = new EventRaisingClass();
subject.MonitorEvents();
subject.RaiseEventWithSenderAndPropertyName(null);
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action act = () => subject.ShouldRaisePropertyChangeFor(null);
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
act.ShouldNotThrow();
}
public void When_asserting_that_an_event_was_not_raised_and_it_doesnt_exist_it_should_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//----------------------------------------------------------------------------------------------------------
var subject = new EventRaisingClass();
subject.MonitorEvents();
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action act = () => subject.ShouldNotRaise("NonExistingEvent");
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
act.ShouldThrow<InvalidOperationException>().WithMessage(
"Not monitoring any events named \"NonExistingEvent\".");
}
public void When_a_property_agnostic_property_changed_event_for_was_not_raised_it_should_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//----------------------------------------------------------------------------------------------------------
var subject = new EventRaisingClass();
subject.MonitorEvents();
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action act = () => subject.ShouldRaisePropertyChangeFor(null);
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
act.ShouldThrow<AssertFailedException>().WithMessage(
"Expected object " + Formatter.ToString(subject) +
" to raise event \"PropertyChanged\" for property <null>, but it did not.");
}
public void When_an_unexpected_event_was_raised_it_should_throw_and_use_the_reason()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//----------------------------------------------------------------------------------------------------------
var subject = new EventRaisingClass();
subject.MonitorEvents();
subject.RaiseEventWithoutSender();
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action act = () => subject.ShouldNotRaise("PropertyChanged", "{0} should cause the event to get raised", "Foo()");
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
act.ShouldThrow<AssertFailedException>()
.WithMessage("Expected object " + Formatter.ToString(subject) +
" to not raise event \"PropertyChanged\" because Foo() should cause the event to get raised, but it did.");
}
public void When_monitoring_class_it_should_be_possible_to_obtain_a_recorder()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
var eventSource = new EventRaisingClass();
eventSource.MonitorEvents();
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
var recorder = eventSource.GetRecorderForEvent("PropertyChanged");
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
recorder.Should().NotBeNull();
recorder.EventObject.Should().BeSameAs(eventSource);
recorder.EventName.Should().Be("PropertyChanged");
}
public void When_an_unexpected_event_was_not_raised_it_should_not_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//----------------------------------------------------------------------------------------------------------
var subject = new EventRaisingClass();
subject.MonitorEvents();
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action act = () => subject.ShouldNotRaise("PropertyChanged");
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
act.ShouldNotThrow();
}
public void When_no_recorder_exists_for_an_event_it_should_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
var eventSource = new EventRaisingClass();
eventSource.MonitorEvents();
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action action = () => eventSource.GetRecorderForEvent("SomeEvent");
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
action.ShouldThrow<InvalidOperationException>()
.WithMessage("*not expose*SomeEvent*");
}
public void When_the_event_sender_is_not_the_expected_object_it_should_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//----------------------------------------------------------------------------------------------------------
var subject = new EventRaisingClass();
subject.MonitorEvents();
subject.RaiseEventWithoutSender();
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action act = () => subject.ShouldRaise("PropertyChanged").WithSender(subject);
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
act.ShouldThrow<AssertFailedException>().WithMessage("Expected sender " + Formatter.ToString(subject) +
", but found <null>.");
}
public void When_the_event_sender_is_the_expected_object_it_should_not_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//----------------------------------------------------------------------------------------------------------
var subject = new EventRaisingClass();
subject.MonitorEvents();
subject.RaiseEventWithSender();
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action act = () => subject.ShouldRaise("PropertyChanged").WithSender(subject);
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
act.ShouldNotThrow();
}
public void When_trying_to_attach_to_something_other_than_notify_property_changed_should_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//----------------------------------------------------------------------------------------------------------
var subject = new EventRaisingClass();
var eventMonitor = subject.MonitorEvents();
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action act = () => eventMonitor.Attach(typeof(EventRaisingClass));
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
act.ShouldThrow<NotSupportedException>()
.WithMessage("Cannot monitor events of type \"EventRaisingClass\".");
}
