CSS выберите текст внутри div

CSS doesn't work this way. As biziclop says in the comments, text nodes can't be selected with CSS. You'll either have to wrap your text in a <span> and use

.test span {
    cursor: pointer;
}
With

<div class="test">
    <span>Text</span>
</div>
Or set .test to display: inline, but that won't let you give it a width, which is not the behaviour you want. <span>s are fine, in this case.
Santino