TST: add test case for multiple consecutive NaTs in PeriodIndex

Author: winklerand

pandas/tests/test_resample.py

@@ -2878,16 +2878,22 @@ def test_upsampling_ohlc(self, freq, period_mult, kind):
         result = s.resample(freq, kind=kind).ohlc()
         assert_frame_equal(result, expected)
 
+    @pytest.mark.parametrize('periods, values',
+                             [([pd.NaT, '1970-01-01 00:00:00', pd.NaT,
+                                '1970-01-01 00:00:02', '1970-01-01 00:00:03'],
+                               [2, 3, 5, 7, 11]),
+                              ([pd.NaT, pd.NaT, '1970-01-01 00:00:00', pd.NaT,
+                                pd.NaT, pd.NaT, '1970-01-01 00:00:02',
+                                '1970-01-01 00:00:03', pd.NaT, pd.NaT],
+                               [1, 2, 3, 5, 6, 8, 7, 11, 12, 13])])
     @pytest.mark.parametrize('freq, expected_values',
                              [('1s', [3, np.NaN, 7, 11]),
                               ('2s', [3, int((7 + 11) / 2)]),
                               ('3s', [int((3 + 7) / 2), 11])])
-    def test_resample_with_nat(self, freq, expected_values):
+    def test_resample_with_nat(self, periods, values, freq, expected_values):
         # GH 13224
-        index = PeriodIndex([pd.NaT, '1970-01-01 00:00:00', pd.NaT,
-                             '1970-01-01 00:00:02', '1970-01-01 00:00:03'],
-                            freq='S')
-        frame = DataFrame([2, 3, 5, 7, 11], index=index)
+        index = PeriodIndex(periods, freq='S')
+        frame = DataFrame(values, index=index)
 
         expected_index = period_range('1970-01-01 00:00:00',
                                       periods=len(expected_values), freq=freq)