code: def testExamples(self):
      with self.subTest("Initial state"):
          examples = standard_artifacts.Examples()
          self.assertEqual(examples.split_names, "")
          self.assertEmpty(examples.splits)
  
      with self.subTest("Empty splits"):
          examples = standard_artifacts.Examples()
          examples.splits = []
          self.assertEqual(examples.split_names, "[]")
          self.assertEmpty(examples.splits)
  
      with self.subTest("Single split"):
          examples = standard_artifacts.Examples()
          examples.splits = ["train"]
          self.assertEqual(examples.split_names, '["train"]')
  
      with self.subTest("Multiple splits"):
          examples = standard_artifacts.Examples()
          examples.splits = ["train", "validation", "test"]
          self.assertEqual(
              examples.split_names, '["train", "validation", "test"]'
          )
  
      with self.subTest("Invalid splits"):
          examples = standard_artifacts.Examples()
          with self.assertRaises(ValueError):
              examples.splits = [
                  "train",
                  "_validation",
              ]  # Should not start with _.
          with self.assertRaises(TypeError):
              examples.splits = (
                  '["train", "validation"]'  # Should be Sequence[str]
              )
  
      with self.subTest("Split path"):
          examples = standard_artifacts.Examples()
          examples.uri = "/test"
          examples.splits = ["train"]
          self.assertEqual(
              examples.path(split="train"), "/test/Split-train"
          )
          with self.assertRaises(ValueError):
              examples.path(split="non-existing")
  
imports: import math
  from typing import Any, Dict
  from unittest import mock
  import absl
  import tensorflow
  from tfx.types import standard_artifacts
  from tfx.utils import json_utils
label_desc: Use image node_id 13 for calling the StandardArtifactsTest obj's underlying member method code with example usage: obj.testExamples() without return types