public void TestValidExecute()
{
var command = new ChangeTextCommand(this.cell, TestString);
command.Execute();
Assert.AreEqual(TestString, this.cell.Text);
}
public void TestValidUndo()
{
const string originalText = "original string";
this.cell.Text = originalText;
var command = new ChangeTextCommand(this.cell, TestString);
command.Execute();
command.Undo();
Assert.AreEqual(originalText, this.cell.Text);
}