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

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

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