code: def test_value_error(self):
      with self.assertRaises(ValueError):
          password_generator.generate_password(7)
      with self.assertRaises(ValueError):
          password_generator.generate_password(17)
  
imports: import unittest
  import password_generator
label_desc: Use image node_id 2 for calling the TestPasswordGenerator obj's underlying member method code with example usage: obj.test_value_error() without return types