code: def test_invalid_linestring(self):
      with self.assertRaises(ValueError) as cm:
          geojson.LineString([(8.919, 44.4074)], validate=True)
  
      self.assertIn(
          "must be an array of two or more positions", str(cm.exception)
      )
  
      with self.assertRaises(ValueError) as cm:
          geojson.LineString([(8.919, 44.4074), [3]], validate=True)
  
      self.assertIn(
          "a position must have exactly 2 or 3 values",
          str(cm.exception),
      )
  
imports: import unittest
  import geojson
label_desc: Use image node_id 1 for calling the TestValidationLineString obj's underlying member method code with example usage: obj.test_invalid_linestring() without return types