public void Extend()
{
expandablePanel = new TestExpandablePanel(helper.Object);
expandablePanel.Parent = new Panel();
expandablePanel.Extend(500);
helper.Verify(x => x.SetHeight(It.IsAny <Control>(), It.IsAny <int>()), Times.Exactly(2));
}
public void OnExtendedFired()
{
eventCounter = 0;
expandablePanel.Extend(500);
expandablePanel.Height = 434;
expandablePanel.TestExtendPanel(null, null);
Assert.AreEqual(0, eventCounter);
expandablePanel.TestExtendPanel(null, null);
Assert.AreEqual(1, eventCounter);
}