CI/TST: Fix test for pyarrow 8.0 release (#46991)

Author: mroeschke

pandas/compat/pyarrow.py

@@ -14,6 +14,7 @@
     pa_version_under5p0 = _palv < Version("5.0.0")
     pa_version_under6p0 = _palv < Version("6.0.0")
     pa_version_under7p0 = _palv < Version("7.0.0")
+    pa_version_under8p0 = _palv < Version("8.0.0")
 except ImportError:
     pa_version_under1p01 = True
     pa_version_under2p0 = True
@@ -22,3 +23,4 @@
     pa_version_under5p0 = True
     pa_version_under6p0 = True
     pa_version_under7p0 = True
+    pa_version_under8p0 = True

pandas/tests/io/test_parquet.py

@@ -18,6 +18,7 @@
     pa_version_under2p0,
     pa_version_under5p0,
     pa_version_under6p0,
+    pa_version_under8p0,
 )
 import pandas.util._test_decorators as td
 
@@ -718,11 +719,14 @@ def test_duplicate_columns(self, pa):
         df = pd.DataFrame(np.arange(12).reshape(4, 3), columns=list("aaa")).copy()
         self.check_error_on_write(df, pa, ValueError, "Duplicate column names found")
 
-    def test_unsupported(self, pa):
-        # timedelta
+    def test_timedelta(self, pa):
         df = pd.DataFrame({"a": pd.timedelta_range("1 day", periods=3)})
-        self.check_external_error_on_write(df, pa, NotImplementedError)
+        if pa_version_under8p0:
+            self.check_external_error_on_write(df, pa, NotImplementedError)
+        else:
+            check_round_trip(df, pa)
 
+    def test_unsupported(self, pa):
         # mixed python objects
         df = pd.DataFrame({"a": ["a", 1, 2.0]})
         # pyarrow 0.11 raises ArrowTypeError