Update test_period_range.py

pandas/tests/indexes/period/test_period_range.py

@@ -1,3 +1,4 @@
+import numpy as np
 import pytest
 
 from pandas import NaT, Period, PeriodIndex, date_range, period_range
@@ -51,6 +52,13 @@ def test_construction_from_period(self):
         result = period_range(start=start, end=end, freq="Q", name="foo")
         tm.assert_index_equal(result, expected)
 
+        # test for issue # 21793
+        start, end = Period("2017Q1", freq="Q"), Period("2018Q1", freq="Q")
+        idx = period_range(start=start, end=end, freq="Q", name="foo")
+        result = idx == idx.values
+        expected = np.array([True, True, True, True, True])
+        tm.assert_numpy_array_equal(result, expected)
+
         # empty
         expected = PeriodIndex([], freq="W", name="foo")