public void ItShould_Remove_Last_Document()
{
_removeSomeCommand.Execute();
_documentCommandFactoryMock.Verify(v => v.CreateCommand(It.Is <IClosedDocument>(p => p == NullDocument.Instance)), Times.Exactly(2));
_documentCommandMock.Verify(v => v.Execute(), Times.Exactly(2));
_documentHistoryCommandsMock.Verify(v => v.Remove(It.IsAny <IClosedDocument[]>()), Times.Once);
}
public void ItShould_Handle_Nulls()
{
var command = new RemoveSomeCommand(null, null, NullDocument.Instance);
command.Execute();
_documentHistoryCommandsMock.Verify(v => v.RemoveLast(), Times.Never);
_documentCommandFactoryMock.Verify(v => v.CreateCommand(It.IsAny <IClosedDocument>()), Times.Never);
_documentCommandMock.Verify(v => v.Execute(), Times.Never);
}