joosthooz commented on code in PR #14414:
URL: https://github.com/apache/arrow/pull/14414#discussion_r996980474
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python/pyarrow/tests/test_dataset.py:
##########
@@ -3241,6 +3241,40 @@ def test_feather_format(tempdir, dataset_reader):
dataset_reader.to_table(ds.dataset(basedir, format="feather"))
[email protected]
[email protected]("compression", [
+ "lz4",
+ "zstd",
+ "brotli" # not supported
+])
+def test_feather_format_compressed(tempdir, compression, dataset_reader):
+ table = pa.table({'a': pa.array([1, 2, 3], type="int8"),
+ 'b': pa.array([.1, .2, .3], type="float64")})
+
+ basedir = tempdir / "feather_dataset"
+ basedir.mkdir()
+ file_format = ds.IpcFileFormat()
+ if compression == "brotli":
+ with pytest.raises(ValueError, match="Compression type"):
+ write_options =
file_format.make_write_options(compression=compression)
+ with pytest.raises(ValueError, match="Compression type"):
+ codec = pa.Codec(compression)
+ write_options = file_format.make_write_options(compression=codec)
+ return
+
+ write_options = file_format.make_write_options(compression=compression)
+ ds.write_dataset(
+ table,
+ str(basedir / "data.arrow"),
+ format=file_format,
+ file_options=write_options
+ )
Review Comment:
Yes, I noticed that too. But as a proxy test I could create a bit larger
table with lots of zeroes and check if the filesize is smaller!
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