public void ValidSelections()
{
AssembledStyles styles = new AssembledStyles();
var clientRuns = new List <IClientRun>();
var run0 = new StringClientRun("First run", styles);
var run1 = new StringClientRun("Middle run", styles);
BlockBox box0 = new BlockBox(styles, Color.Red, 72000, 36000);
var run2 = new StringClientRun("Last run", styles);
clientRuns.Add(run0);
clientRuns.Add(run1);
clientRuns.Add(box0);
clientRuns.Add(run2);
TextSource source = new TextSource(clientRuns, null);
ParaBox para0 = new ParaBox(styles, source);
run0.Hookup = new LiteralStringParaHookup(para0, para0);
run1.Hookup = new LiteralStringParaHookup(para0, para0);
run2.Hookup = new LiteralStringParaHookup(para0, para0);
DivBox div = new DivBox(styles);
RootBox root = new RootBox(styles);
para0.Container = div;
MockGraphics graphics = new MockGraphics();
LayoutInfo layoutArgs = ParaBuilderTests.MakeLayoutInfo(100, graphics);
root.Layout(layoutArgs);
root.AddBox(div);
var sel = para0.SelectAtStart();
root.Selection = sel;
Assert.That(!root.Selection.IsValid);
div.AddBox(para0);
root.RemoveBoxes(div, div);
div.Container = root;
Assert.That(!root.Selection.IsValid);
root.AddBox(div);
Assert.That(root.Selection.IsValid);
(root.Selection as InsertionPoint).Hookup.ClientRunIndex = 4;
Assert.That(!root.Selection.IsValid);
(root.Selection as InsertionPoint).Hookup.ClientRunIndex = 2;
Assert.That(!root.Selection.IsValid);
(root.Selection as InsertionPoint).Hookup.ClientRunIndex = 0;
(root.Selection as InsertionPoint).StringPosition = 10;
Assert.That(!root.Selection.IsValid);
(root.Selection as InsertionPoint).StringPosition = 0;
run0.Hookup = null;
Assert.That(!root.Selection.IsValid);
run0.Hookup = new LiteralStringParaHookup(para0, para0);
sel = para0.SelectAtStart();
root.Selection = sel;
Assert.That(root.Selection.IsValid);
}
