Hi,
I have a problem that is best described on the example. Here is the
class that is under the test:
public class A
{
public virtual event EventHandler TestEvent;
public void TestEventHandler(object sender, EventArgs e) { }
public void SubscribeChildToEvent(A child)
{
TestEvent += child.TestEventHandler;
}
}
I want to test if the child.TestEventHandler method is subscribed to
the TestEvent. Here is the test:
[TestMethod]
public void TestEventSubscription()
{
A parent = _Mocks.PartialMock<A>();
A child = _Mocks.PartialMock<A>();
parent.TestEvent += child.TestEventHandler;
_Mocks.ReplayAll();
parent.SubscribeChildToEvent(child);
_Mocks.VerifyAll();
}
The test fails saying: The method TestEventSubscription threw
exception: ExpectationViolationException: A.add_TestEvent
(System.EventHanlder); Expected #1, Actual #0.
However, if I subscribe to the same event with the same handler
explicitely, the test passes:
[TestMethod]
public void TestEventSubscription()
{
A parent = _Mocks.PartialMock<A>();
A child = _Mocks.PartialMock<A>();
parent.TestEvent += child.TestEventHandler;
_Mocks.ReplayAll();
parent.TestEvent += child.TestEventHandler;
_Mocks.VerifyAll();
}
My question is: why event subscription in mocks cannot be verified? I
hope the answer helps me to resolve my issue.
Thanks,
Vitaly
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