Assert a link with the provided text points to the provided URL.

def should_see_link_text(self, link_text, link_url):
    """Assert a link with the provided text points to the provided URL."""

    elements = ElementSelector(
        world.browser,
        str('//a[@href="%s"][./text()="%s"]' % (link_url, link_text)),
        filter_displayed=True,
    )
    if not elements:
        raise AssertionError("Expected link not found.")