code: def test_date_type(self):
      rows = [("5/7/1984",), ("2/28/1997",), ("3/19/2020",), ("",)]
  
      inferred = self.tester.run(rows, ["one"])
  
      self.assertIsInstance(inferred[0], Date)
  
imports: import unittest
  from agate.data_types import Boolean, Date, DateTime, Number, Text, TimeDelta
  from agate.type_tester import TypeTester
label_desc: Use image node_id 9 for calling the TestTypeTester obj's underlying member method code with example usage: obj.test_date_type() without return types