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/scenario1.nim

@@ -20,39 +20,16 @@ proc test*(session: Session, baseUrl: string) =
   # Logging in
   test "can login/logout":
     with session:
-      click "#login-btn"
-
-      sendKeys "#login-form input[name='username']", "admin"
-      sendKeys "#login-form input[name='password']", "admin"
-
-      sendKeys "#login-form input[name='password']", Key.Enter
-      wait()
-
-      # Verify that the user menu has been initialised properly.
-      click "#profile-btn"
-      checkText "#profile-btn #profile-name", "admin"
+      login("admin", "admin")
 
       # Check whether we can log out.
-      click "#logout-btn"
+      logout()
       # Verify we have logged out by looking for the log in button.
       ensureExists "#login-btn"
 
   test "can register":
     with session:
-      click "#signup-btn"
-
-      sendKeys "#signup-form input[name='email']", "test@test.com"
-      sendKeys "#signup-form input[name='username']", "test"
-      sendKeys "#signup-form input[name='password']", "test"
-
-      click "#signup-modal .create-account-btn"
-      wait()
-
-      # Verify that the user menu has been initialised properly.
-      click "#profile-btn"
-      checkText "#profile-btn #profile-name", "test"
-      # close menu
-      click "#profile-btn"
+      register("test", "test")
 
   session.navigate(baseUrl)
   session.wait()