public void MainForm_DestroyOldHandleWithThreadExit_CallsHandler()
{
var mainForm = new SubForm();
var newMainForm = new SubForm();
var context = new ApplicationContext(mainForm)
{
MainForm = newMainForm
};
int callCount = 0;
EventHandler handler = (sender, e) =>
{
Assert.Same(context, sender);
Assert.Same(EventArgs.Empty, e);
callCount++;
};
context.ThreadExit += handler;
Assert.NotEqual(IntPtr.Zero, mainForm.Handle);
Assert.Equal(0, callCount);
Assert.NotEqual(IntPtr.Zero, newMainForm.Handle);
Assert.Equal(0, callCount);
mainForm.OnHandleDestroyed(EventArgs.Empty);
Assert.Equal(0, callCount);
newMainForm.OnHandleDestroyed(EventArgs.Empty);
Assert.Equal(1, callCount);
// Call again.
mainForm.OnHandleDestroyed(EventArgs.Empty);
Assert.Equal(1, callCount);
newMainForm.OnHandleDestroyed(EventArgs.Empty);
Assert.Equal(1, callCount);
}