Tests permission requirements on routes.
public function testPermissionAccess() {
  $this
    ->drupalGet('router_test/test7');
  $this
    ->assertResponse(403, "Access denied for a route where we don't have a permission");
  $this
    ->drupalGet('router_test/test8');
  $this
    ->assertResponse(403, 'Access denied by default if no access specified');
  $user = $this
    ->drupalCreateUser(array(
    'access test7',
  ));
  $this
    ->drupalLogin($user);
  $this
    ->drupalGet('router_test/test7');
  $this
    ->assertResponse(200);
  $this
    ->assertNoRaw('Access denied');
  $this
    ->assertRaw('test7text', 'The correct string was returned because the route was successful.');
  $this
    ->drupalGet('router_test/test9');
  $this
    ->assertResponse(200);
  $this
    ->assertNoRaw('Access denied');
  $this
    ->assertRaw('test8', 'The correct string was returned because the route was successful.');
}