public void LayoutManager_Should_Prevent_Infinite_Loop_On_Arrange()
{
var control = new LayoutTestControl();
var root = new LayoutTestRoot {
Child = control
};
root.LayoutManager.ExecuteInitialLayoutPass(root);
control.Arranged = false;
int cnt = 0;
int maxcnt = 100;
control.DoArrangeOverride = (l, s) =>
{
//emulate a problem in the logic of a control that triggers
//invalidate measure during arrange
//it can lead to infinity loop in layoutmanager
if (++cnt < maxcnt)
{
control.InvalidateArrange();
}
return(new Size(100, 100));
};
control.InvalidateArrange();
root.LayoutManager.ExecuteLayoutPass();
Assert.True(cnt < 100);
}
public void Arranges_InvalidateArranged_Control()
{
var control = new LayoutTestControl();
var root = new LayoutTestRoot {
Child = control
};
root.LayoutManager.ExecuteInitialLayoutPass(root);
control.Measured = control.Arranged = false;
control.InvalidateArrange();
root.LayoutManager.ExecuteLayoutPass();
Assert.False(control.Measured);
Assert.True(control.Arranged);
}