sAttribute(valid_names[i]))
    assert_true(!el.toggleAttribute(valid_names[i]))
    assert_true(!el.hasAttribute(valid_names[i]))
    // Check using force attr
    assert_true(el.toggleAttribute(valid_names[i], true))
    assert_true(el.hasAttribute(valid_names[i]))
    assert_true(el.toggleAttribute(valid_names[i], true))
    assert_true(el.hasAttribute(valid_names[i]))
    assert_true(!el.toggleAttribute(valid_names[i], false))
    assert_true(!el.hasAttribute(valid_names[i]))
  }
}, "Basic functionality