code: def test_jpg_to_blob(self, image):
      blob = content_types.image_to_blob(image)
      self.assertIsInstance(blob, glm.Blob)
      self.assertEqual(blob.mime_type, "image/jpeg")
      self.assertStartsWith(blob.data, b"\xff\xd8\xff\xe0\x00\x10JFIF")
  
imports: import copy
  import pathlib
  import unittest.mock
  from absl.testing import absltest
  from absl.testing import parameterized
  import google.ai.generativelanguage
  import google.generativeai
  from google.generativeai.types import content_types
  from google.generativeai.types import safety_types
  import IPython.display
  import PIL.Image
label_desc: Use image node_id 2 for calling the UnitTests obj's underlying member method code with example usage: obj.test_jpg_to_blob(image) without return types