COMPAT: pyarrow >= 0.7.0 compat

closes #17581

Author: jreback

ci/requirements-3.6_NUMPY_DEV.build.sh

@@ -14,4 +14,7 @@ pip install --pre --upgrade --timeout=60 -f $PRE_WHEELS numpy scipy
 # install dateutil from master
 pip install -U git+git://github.com/dateutil/dateutil.git
 
+# install pyarrow daily
+conda install pyarrow -c twosigma
+
 true

pandas/tests/io/test_parquet.py

@@ -302,10 +302,6 @@ def test_unsupported(self, pa):
         df = pd.DataFrame({'a': pd.period_range('2013', freq='M', periods=3)})
         self.check_error_on_write(df, pa, ValueError)
 
-        # categorical
-        df = pd.DataFrame({'a': pd.Categorical(list('abc'))})
-        self.check_error_on_write(df, pa, NotImplementedError)
-
         # timedelta
         df = pd.DataFrame({'a': pd.timedelta_range('1 day',
                                                    periods=3)})
@@ -315,6 +311,20 @@ def test_unsupported(self, pa):
         df = pd.DataFrame({'a': ['a', 1, 2.0]})
         self.check_error_on_write(df, pa, ValueError)
 
+    @pytest.mark.skip(pyarrow.__version__ < '0.7.0')
+    def test_categorical(self, pa):
+
+        # supported in >= 0.7.0
+        df = pd.DataFrame({'a': pd.Categorical(list('abc'))})
+        self.check_round_trip(df, pa)
+
+    @pytest.mark.skip(pyarrow.__version__ >= '0.7.0')
+    def test_categorical_unsupported(self, pa):
+
+        # supported in >= 0.7.0
+        df = pd.DataFrame({'a': pd.Categorical(list('abc'))})
+        self.check_error_on_write(df, pa, NotImplementedError)
+
 
 class TestParquetFastParquet(Base):