@Override
public void redo() throws Exception {
command.execute();
command.undo();
command.redo();
verify(container, times(2)).addCard(card);
}
@Override
public void undo() throws Exception {
assertThat(command.canUndo(), is(false));
command.execute();
assertThat(command.canUndo(), is(true));
command.undo();
verify(container).removeCard(card);
}