code: def test_testing():
      """Test testing ports"""
      assert_raises(AssertionError, assert_in, "foo", "bar")
      assert_in("foo", "foobar")
      assert_raises(AssertionError, assert_not_in, "foo", "foobar")
      assert_not_in("foo", "bar")
      assert_raises(AssertionError, assert_is, None, 0)
      assert_is(None, None)
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_testing() without return types