public void WeakEventManager_HandleEvent_ValidImplementation()
{
//Arrange
TestEvent += HandleTestEvent;
bool didEventFire = false;
void HandleTestEvent(object?sender, EventArgs e)
{
if (sender is null)
{
throw new ArgumentNullException(nameof(sender));
}
Assert.IsNotNull(sender);
Assert.AreEqual(this.GetType(), sender.GetType());
Assert.IsNotNull(e);
didEventFire = true;
TestEvent -= HandleTestEvent;
}
//Act
TestWeakEventManager.HandleEvent(this, new EventArgs(), nameof(TestEvent));
//Assert
Assert.IsTrue(didEventFire);
}
public void WeakEventManager_HandleEvent_NullEventArgs()
{
//Arrange
TestEvent += HandleTestEvent;
bool didEventFire = false;
void HandleTestEvent(object?sender, EventArgs e)
{
if (sender is null)
{
throw new ArgumentNullException(nameof(sender));
}
Assert.IsNotNull(sender);
Assert.AreEqual(this.GetType(), sender.GetType());
Assert.IsNull(e);
didEventFire = true;
TestEvent -= HandleTestEvent;
}
//Act
#pragma warning disable CS8625 //Cannot convert null literal to non-nullable reference type
TestWeakEventManager.HandleEvent(this, null, nameof(TestEvent));
#pragma warning restore CS8625
//Assert
Assert.IsTrue(didEventFire);
}
public void WeakEventManager_HandleEvent_InvalidHandleEvent()
{
//Arrange
TestEvent += HandleTestEvent;
bool didEventFire = false;
void HandleTestEvent(object?sender, EventArgs e) => didEventFire = true;
//Act
//Assert
Assert.Throws <InvalidHandleEventException>(() => TestWeakEventManager.HandleEvent(nameof(TestEvent)));
Assert.IsFalse(didEventFire);
TestEvent -= HandleTestEvent;
}
public void WeakEventManager_UnassignedEvent()
{
//Arrange
bool didEventFire = false;
TestEvent += HandleTestEvent;
TestEvent -= HandleTestEvent;
void HandleTestEvent(object?sender, EventArgs e) => didEventFire = true;
//Act
TestWeakEventManager.HandleEvent(null, null, nameof(TestEvent));
//Assert
Assert.IsFalse(didEventFire);
}
public void WeakEventManager_HandleEvent_InvalidHandleEventName()
{
//Arrange
TestEvent += HandleTestEvent;
bool didEventFire = false;
void HandleTestEvent(object?sender, EventArgs e) => didEventFire = true;
//Act
TestWeakEventManager.HandleEvent(this, new EventArgs(), nameof(TestStringEvent));
//Assert
Assert.False(didEventFire);
TestEvent -= HandleTestEvent;
}
public void WeakEventManager_HandleEvent_NullSender()
{
//Arrange
TestEvent += HandleTestEvent;
bool didEventFire = false;
void HandleTestEvent(object?sender, EventArgs e)
{
Assert.IsNull(sender);
Assert.IsNotNull(e);
didEventFire = true;
TestEvent -= HandleTestEvent;
}
//Act
TestWeakEventManager.HandleEvent(null, new EventArgs(), nameof(TestEvent));
//Assert
Assert.IsTrue(didEventFire);
}
public void WeakEventManager_HandleEvent_NullEventArgs()
{
//Arrange
TestEvent += HandleTestEvent;
bool didEventFire = false;
void HandleTestEvent(object sender, EventArgs e)
{
Assert.IsNotNull(sender);
Assert.AreEqual(this.GetType(), sender.GetType());
Assert.IsNull(e);
didEventFire = true;
TestEvent -= HandleTestEvent;
}
//Act
TestWeakEventManager.HandleEvent(this, null, nameof(TestEvent));
//Assert
Assert.IsTrue(didEventFire);
}
