test for nested EA

Author: jreback

pandas/tests/series/test_explode.py

@@ -91,3 +91,18 @@ def test_typical_usecase():
         {"var2": [1, 1, 1, 2, 2, 2], "var1": list("abcdef")}, index=[0, 0, 0, 1, 1, 1]
     )
     tm.assert_frame_equal(result, expected, check_like=True)
+
+
+def test_nested_EA():
+    # a nested EA array
+    s = pd.Series(
+        [
+            pd.date_range("20170101", periods=3, tz="UTC"),
+            pd.date_range("20170104", periods=3, tz="UTC"),
+        ]
+    )
+    result = s.explode()
+    expected = pd.Series(
+        pd.date_range("20170101", periods=6, tz="UTC"), index=[0, 0, 0, 1, 1, 1]
+    )
+    tm.assert_series_equal(result, expected)