If $post at wp_footer doesn't match the queried object, the floating post social links will be thrown off.

[benlk]

Discovered in INN/umbrella-freshenergy#21, where the fix was to make sure that the child theme's code didn't squash the global $post. However, we can't assume that plugins or widgets won't interfere with that.

SO:

• write a test that
  1. Uses a post factory to create a post a
  2. Uses a post factory to create a post b
  3. Navigates to a
  4. Sets global $post to b
  5. Expects that the output of largo_post_social_links() is for a, not b
• make point 5 above true, by drawing from the queried object rather than global $post.