public void Should_Support_Undo()
{
var sut = new ReversibleDocument <TextDocument>(new TextDocument());
sut.AddChar('a');
sut.AddChar('z');
sut.AddChar('E');
sut.AddChar('f');
sut.AddChar('é');
sut.Undo();
Assert.That(sut.Document.ToString(), Is.EqualTo("azEf"));
}
public static void AddChar(this ReversibleDocument <TextDocument> doc, char c)
{
doc.Do(new AddCharCommand(c)).Apply();
}
/// <summary>
/// Inverts all pixels in the picture.
/// </summary>
/// <param name="doc">The document to apply this transformation to.</param>
/// <returns></returns>
public static ReversibleDocument <IPicture> Invert(this ReversibleDocument <IPicture> doc)
{
return(doc.Do(new InvertPictureReversibleCommand()));
}
public static ReversibleDocument <IPicture> Fill(this ReversibleDocument <IPicture> doc, int x, int y, Color oldColor, Color newColor)
{
return(doc.Do(new FillPictureWithColorCommand(oldColor, newColor, x, y)));
}
/// <summary>
/// Rotates the picture by angleDegrees degrees.
/// </summary>
/// <param name="doc">The document to apply this transformation to.</param>
/// <param name="angleDegrees">The amount to rotate, in degrees.</param>
/// <returns></returns>
public static ReversibleDocument <IPicture> Rotate(this ReversibleDocument <IPicture> doc, double angleDegrees)
{
return(doc.Do(new RotatePictureReversibleCommand(angleDegrees)));
}
