class_docstr: Test ability to marshall date_input protos.
class_docstr_tok: ["Test","ability","to","marshall","date_input","protos","."]
docstr: Test that it can be called with no value.
docstr_tok: ["Test","that","it","can","be","called","with","no","value","."]
code: def test_just_label(self):
      """Test that it can be called with no value."""
      st.date_input("the label")
  
      c = self.get_delta_from_queue().new_element.date_input
      self.assertEqual(c.label, "the label")
      self.assertEqual(
          c.label_visibility.value,
          LabelVisibilityMessage.LabelVisibilityOptions.VISIBLE,
      )
      self.assertLessEqual(
          datetime.strptime(c.default[0], "%Y/%m/%d").date(),
          datetime.now().date(),
      )
      self.assertEqual(c.disabled, False)
  
imports: from datetime import date, datetime, timedelta
  from parameterized import parameterized
  from pytest import raises
  import streamlit
  from streamlit.errors import StreamlitAPIException
  from streamlit.proto.LabelVisibilityMessage_pb2 import LabelVisibilityMessage
  from streamlit.testing.v1.app_test import AppTest
  from tests.delta_generator_test_case import DeltaGeneratorTestCase
label_desc: Use image node_id 1 for calling the DateInputTest obj's underlying member method code with example usage: obj.test_just_label() without return types