Test path containing "exotic" characters.
function testExoticPath() {
  $path = "menu-test/ -._~!\$'\"()*@[]?&+%#,;=:" . "%23%25%26%2B%2F%3F" . "éøïвβ中國書۞";
  // Characters from various non-ASCII alphabets.
  $this
    ->drupalGet($path);
  $this
    ->assertRaw('This is menu_test_callback().');
}