public void GivenParamCommandWithCanExec_WhenRegisteringEvent_ThenItReactWithProperHandler()
{
TEST_OUTPUT = String.Empty;
paramsCommandRelayerSubject = new RelayCommand <object>(o => TEST_OUTPUT += "1", o => false);
paramsCommandRelayerSubject.CanExecuteChanged += (sender, args) => TEST_OUTPUT += "5";
RandomProperty = new object();
DispatcherTestHelper.ProcessWorkItems(DispatcherPriority.Background);
Assert.Equal("5", TEST_OUTPUT);
}
public void GivenSimpleCommandWithCanExec_WhenUnRegisteringEvent_ThenItDoesNothing()
{
TEST_OUTPUT = String.Empty;
simpleCommandRelayerSubject = new RelayCommand(() => TEST_OUTPUT += "1", () => false);
EventHandler handler = (sender, args) => TEST_OUTPUT += "5";
simpleCommandRelayerSubject.CanExecuteChanged += handler;
simpleCommandRelayerSubject.CanExecuteChanged -= handler;
RandomProperty = new object();
DispatcherTestHelper.ProcessWorkItems(DispatcherPriority.Background);
Assert.Equal(String.Empty, TEST_OUTPUT);
}