code: def test_invalid_polygon(self):
      with self.assertRaises(ValueError) as cm:
          geojson.Polygon([1], validate=True)
  
      self.assertIn(
          "Each element of a polygon's coordinates must be a list",
          str(cm.exception),
      )
  
      poly1 = geojson.Polygon(
          [[(2.38, 57.322), (23.194, -20.28), (-120.43, 19.15)]]
      )
      self.assertEqual(poly1.is_valid, False)
      poly2 = geojson.Polygon(
          [
              [
                  (2.38, 57.322),
                  (23.194, -20.28),
                  (-120.43, 19.15),
                  (2.38, 57.323),
              ]
          ]
      )
      self.assertEqual(poly2.is_valid, False)
  
imports: import unittest
  import geojson
label_desc: Use image node_id 1 for calling the TestValidationPolygon obj's underlying member method code with example usage: obj.test_invalid_polygon() without return types