code: def test_text(self):
      nonunicode_text = "hello world"
      unicode_text = "你好"
  
      self.assertFeature(
          feature=features.Text(),
          shape=(),
          dtype=np.str_,
          tests=[
              # Non-unicode
              testing.FeatureExpectationItem(
                  value=nonunicode_text,
                  expected=b"hello world",
                  expected_np=b"hello world",
              ),
              # Unicode
              testing.FeatureExpectationItem(
                  value=unicode_text,
                  expected=b"\xe4\xbd\xa0\xe5\xa5\xbd",  # 你好 in bytes
                  expected_np=b"\xe4\xbd\xa0\xe5\xa5\xbd",  # 你好 in bytes
              ),
              # Empty string
              testing.FeatureExpectationItem(
                  value="",
                  expected=b"",
                  expected_np=b"",
              ),
          ],
      )
  
file_path: datasets/tensorflow_datasets/core/features/text_feature_test.py
imports: import numpy
  import pytest
  from tensorflow_datasets import testing
  from tensorflow_datasets.core import features
  from tensorflow_datasets.core.deprecated.text import text_encoder
label_desc: Use image node_id 1 for calling the TextFeatureTest obj's underlying member method code with example usage: obj.test_text() without return types