Adds attempt to test issue #181. Moves procs to common too.

Sadly the attempt wasn't a success. I decided to commit what I've
got so far and come back to it later. Out of time for this now.

tests/browsertests/issue181.nim

@@ -0,0 +1,46 @@
+import unittest, options, os, common
+
+import webdriver
+
+proc test*(session: Session, baseUrl: string) =
+  session.navigate(baseUrl)
+
+  waitForLoad(session)
+
+  test "can see banned posts":
+    with session:
+      register("issue181", "issue181")
+      logout()
+
+      # Change rank to `user` so they can post.
+      login("admin", "admin")
+
+      navigate(baseUrl & "profile/user")
+      wait()
+      changeRank("user")
+      logout()
+
+      login("issue181", "issue181")
+
+      const title = "Testing issue 181."
+      createThread(title, "Test for issue #181")
+
+      logout()
+      wait()
+
+      login("admin", "admin")
+
+      # Ban our user.
+      navigate(baseUrl & "profile/issue181")
+      changeRank("banned")
+
+      # Make sure the banned user's thread is still visible.
+      navigate(baseUrl)
+      ensureExists("tr.banned")
+      checkText("tr.banned .thread-title > a", title)
+      logout()
+      checkText("tr.banned .thread-title > a", title)
+
+  session.navigate(baseUrl)
+  session.wait()
+  logout(session)