public void TryMerge_WithSelf_Fails()
{
BlockAt <TextBlock>(0).GetCaretAtStart().AsTextCursor().InsertText("This is text");
var self = new InsertTextCommand.InsertTextUndoableAction(BlockAt <TextBlock>(0).BeginCursor(1).ToHandle(), "One");
DidYouKnow.That(self.TryMerge(Context, self)).Should().BeFalse();
}
public void TryMerge_DoesNotMergeWhenNotNextToEachother()
{
BlockAt <TextBlock>(0).GetCaretAtStart().AsTextCursor().InsertText("This is text");
var first =
new InsertTextCommand.InsertTextUndoableAction(BlockAt <TextBlock>(0).BeginCursor(1).ToHandle(), "One");
var second =
new InsertTextCommand.InsertTextUndoableAction(BlockAt <TextBlock>(0).BeginCursor(2).ToHandle(), "Two");
DidYouKnow.That(first.TryMerge(Context, second)).Should().BeFalse();
}
public void VerifyMergeWith_ModifiesOriginalAction()
{
var originalAction =
new InsertTextCommand.InsertTextUndoableAction(BlockAt(0).EndCursor().ToHandle(), "The text");
originalAction.Do(Context);
var mergeWithAction =
new InsertTextCommand.InsertTextUndoableAction(BlockAt(0).EndCursor().ToHandle(), "And More");
DidYouKnow.That(originalAction.TryMerge(Context, mergeWithAction)).Should().BeTrue();
DidYouKnow.That(originalAction.Text).Should().Be("The textAnd More");
}
public void TryMerge_WorksOnLargerStrings()
{
BlockAt <TextBlock>(0).GetCaretAtStart().AsTextCursor().InsertText("This is text");
var first =
new InsertTextCommand.InsertTextUndoableAction(BlockAt <TextBlock>(0).BeginCursor().ToHandle(),
"This is a long string");
first.Do(Context);
var second = new InsertTextCommand.InsertTextUndoableAction(
BlockAt <TextBlock>(0).BeginCursor(first.Text.Length).ToHandle(),
"This is also long");
DidYouKnow.That(first.TryMerge(Context, second)).Should().BeTrue();
}
public void VerifyMergeWith_DoesNotActsOnDocument()
{
var originalAction =
new InsertTextCommand.InsertTextUndoableAction(BlockAt(0).EndCursor().ToHandle(), "The text");
originalAction.Do(Context);
var mergeWithAction =
new InsertTextCommand.InsertTextUndoableAction(BlockAt(0).EndCursor().ToHandle(), "And More");
originalAction.TryMerge(Context, mergeWithAction);
// the document should not be modified
DidYouKnow.That(BlockAt <TextBlock>(0).AsText()).Should().Be("The text");
}
public void TryMerge_WithBackspace_DoesNotWorkWhenInsertionIsEmpty()
{
var fakeInsertion =
new InsertTextCommand.InsertTextUndoableAction(BlockAt <TextBlock>(0).BeginCursor().ToHandle(),
"1234");
fakeInsertion.Do(Context);
Context.UndoStack.Clear();
var insertion =
new InsertTextCommand.InsertTextUndoableAction(BlockAt <TextBlock>(0).BeginCursor().ToHandle(), "");
insertion.Do(Context);
var second =
new DeletePreviousCharacterCommand.DeletePreviousCharacterAction(
BlockAt <TextBlock>(0).BeginCaret(4).AsTextCursor());
DidYouKnow.That(insertion.TryMerge(Context, second)).Should().BeFalse();
}
public void TryMerge_WithBackspaceAction_Works()
{
BlockAt <TextBlock>(0).GetCaretAtStart().AsTextCursor().InsertText("This is text");
var insertion =
new InsertTextCommand.InsertTextUndoableAction(BlockAt <TextBlock>(0).BeginCursor().ToHandle(),
"Inserted String");
insertion.Do(Context);
var second =
new DeletePreviousCharacterCommand.DeletePreviousCharacterAction(
BlockAt <TextBlock>(0).BeginCaret(insertion.Text.Length).AsTextCursor());
DidYouKnow.That(insertion.TryMerge(Context, second)).
Should().BeTrue();
DidYouKnow.That(insertion.Text).Should()
.Be("Inserted Strin");
}