public void Test_SubGrid_SetAbsoluteLevel()
{
ISubGrid subgrid = null;
SubGridTree tree = new SubGridTree(SubGridTreeConsts.SubGridTreeLevels, 1.0, new SubGridFactory <NodeSubGrid, LeafSubGrid>());
subgrid = new SubGrid(tree, null, 2); // create a node to be a chile of the root node
// Test setting level for unattached subgrid (even though we set it in the constructor above
subgrid.SetAbsoluteLevel(3);
Assert.Equal(3, subgrid.Level);
// Add subgrid to the root (which will set it's parent and prevent the level from
// being changed and will throw an exception)
try
{
tree.Root.SetSubGrid(0, 0, subgrid);
Assert.True(false, "Calling SetSubGrid with an invalid/non-null level did not throw an exception");
}
catch (Exception)
{
// As expected
}
// Restore Level to the correct value of 2, then assign it into the root subgrid
subgrid.SetAbsoluteLevel(2);
tree.Root.SetSubGrid(0, 0, subgrid);
// Now test the level cannot be changed with root as its parent
try
{
subgrid.SetAbsoluteLevel(2);
Assert.True(false, "Setting absolute level for node with a parent did not raise an exception");
}
catch (Exception)
{
// As expected`
}
}