public void MouseDownWithNodeSelected()
{
treeView.SelectedNode = treeView.Nodes[0];
// Make sure the button click will select the first node
// so choose x=0, y=0.
MouseEventArgs e = new MouseEventArgs(MouseButtons.Left, 1, 0, 0, 0);
treeView.CallMouseDown(e);
Assert.IsNotNull(treeView.SelectedNode, "Sanity check: The mouse down call should not deselect the tree node.");
Assert.AreEqual(1, treeViewEventArgs.Count, "AfterSelect event should be fired once.");
}
