using Glass.Editing;
using UnitTestSharp;

namespace Glass.UnitTests.Editing
{
    public class EditStepTests : TestFixture
    {
        public class ResetTests : TestFixture
        {
            public void ForgetsEverything()
            {
                var step = new EditStep
                {
                    Run = EditRun.Typing,
                    Start = 4,
                    Open = true,
                    Before = new EditState(1, 1, true, 7),
                    After = new EditState(2, 2, true, 8),
                };
                step.Removed.Chars.Append("ab", 0, 2);
                step.Inserted.Chars.Append("cde", 0, 3);

                step.Reset();

                CheckEqual(0, step.StoredLength);
                CheckEqual(EditRun.Other, step.Run);
                CheckEqual(0, step.Start);
                CheckFalse(step.Open);
                CheckEqual(0, step.Before.Caret);
                CheckEqual(0, step.After.Version);
            }

            public void ForgetsPagesAndTextInTheDocument()
            {
                var step = new EditStep();
                step.Removed.Set(EditSide.OfPages(StepTextTests.Pages(40)));
                step.Inserted.Set(EditSide.InDocument(900));

                step.Reset();

                CheckEqual(0, step.Removed.Length);
                CheckEqual(0, step.Inserted.Length);
                CheckFalse(step.Removed.HoldsPages);
                CheckFalse(step.Inserted.IsInDocument);
            }
        }

        public class StoredLengthTests : TestFixture
        {
            public void CountsBothTexts()
            {
                var step = new EditStep();
                step.Removed.Chars.Append("ab", 0, 2);
                step.Inserted.Chars.Append("cde", 0, 3);

                CheckEqual(5, step.StoredLength);
            }

            public void CountsPagesButNotTextInTheDocument()
            {
                var step = new EditStep();
                step.Removed.Set(EditSide.OfPages(PagedTextTests.Paged(new string('x', 40)).TakeOut(0, 40)));
                step.Inserted.Set(EditSide.InDocument(900));

                CheckEqual(40, step.StoredLength);
            }
        }
    }
}