message: Test objects rather than types
diff: import numpy
  import datetime
  +import pandas
  class TestNumpyDate(object):
  def test_fetchall_date(self, duckdb_cursor):
  res = duckdb_cursor.execute("SELECT DATE '2020-01-10' as test_date").fetchall()
  - assert isinstance(res[0][0], datetime.date)
  + assert res == [[datetime.date(2020, 1, 10)]]
  def test_fetchnumpy_date(self, duckdb_cursor):
  res = duckdb_cursor.execute("SELECT DATE '2020-01-10' as test_date").fetchnumpy()
  - assert res['test_date'].dtype == numpy.dtype('datetime64[s]')
  + arr = numpy.array(['2020-01-10'], dtype="datetime64[s]")
  + arr = numpy.ma.masked_array(arr)
  + numpy.testing.assert_array_equal(res['test_date'], arr)
  def test_fetchdf_date(self, duckdb_cursor):
  res = duckdb_cursor.execute("SELECT DATE '2020-01-10' as test_date").fetchdf()
  - assert res['test_date'].dtype == numpy.dtype('datetime64[ns]')
  + ser = pandas.Series(numpy.array(['2020-01-10'], dtype="datetime64[ns]"), name="test_date")
  + pandas.testing.assert_series_equal(res['test_date'], ser)
  \ No newline at end of file
  