using klass for construction

Author: minggli

pandas/tests/frame/test_api.py

@@ -215,7 +215,7 @@ def test_iterrows(self):
             self._assert_series_equal(v, exp)
 
         # GH19671
-        s = DataFrame(
+        s = self.klass(
             {'non_iso8601': ['M1701', 'M1802', 'M1903', 'M2004'],
              'iso8601': date_range('2000-01-01', periods=4, freq='M')})
         for k, v in s.iterrows():