fix pandas test regression (#982)

Author: martindurant

.github/workflows/main.yaml

@@ -154,15 +154,17 @@ jobs:
           pip install pytest-localserver pytest-xdist pytest-asyncio
           pip install meson-python versioneer # Needed for pandas build
           python setup.py build_ext --inplace
+          pip uninstall -y pandas  # remove site-packages version
           python -m pip install ./pandas --no-build-isolation -C compile-args="-j4"
 
       - name: Run Tests
         shell: bash -l {0}
         run: |
-          pytest -v  fastparquet/ # fastparquet test suite against dev pandas
-          pytest --verbose pandas/pandas/tests/io/test_parquet.py
+          PY_IGNORE_IMPORTMISMATCH=1 pytest -v  fastparquet/ # fastparquet test suite against dev pandas
+          cd pandas
+          PY_IGNORE_IMPORTMISMATCH=1 pytest --verbose pandas/tests/io/test_parquet.py -o xfail_strict=False
           # Test parquet with different filesystems
-          pytest --verbose pandas/pandas/tests/io/test_gcs.py pandas/pandas/tests/io/test_fsspec.py -k "parquet" -o xfail_strict=False
+          PY_IGNORE_IMPORTMISMATCH=1 pytest --verbose pandas/tests/io/test_gcs.py pandas/tests/io/test_fsspec.py -k "parquet" -o xfail_strict=False
 
   win:
     name: win

fastparquet/test/test_dataframe.py

@@ -132,7 +132,7 @@ def test_timestamps():
 
 
 def test_pandas_hive_serialization(tmpdir):
-    parquet_dir = tmpdir.join("test.par")
+    parquet_dir = str(tmpdir.join("test.par"))
     column = "data"
     df = pd.DataFrame(
         columns=[column], data=[("42",), ("",), ("0",), ("1",), ("0.0",)]