def test_appending_vars_that_lack_append_dim(self):
src_path_pat = 'src_{}.zarr'
dst_path = 'my.zarr'
self.add_path(dst_path)
writer = DatasetWriter(dst_path, output_overwrite=False,
input_decode_cf=False)
n = 3
for i in range(0, n):
field_names_values = np.full((3, 50), 0, dtype='S')
field_names_values[0, 0] = np.array('A')
field_names_values[1, 0] = np.array('B')
field_names_values[2, 0] = np.array('C')
src_dataset = new_test_dataset(day=i + 1)
src_dataset = src_dataset.assign(
field_names=xr.DataArray(field_names_values,
dims=("fields", "field_name_length"))
)
src_path = src_path_pat.format(i)
self.add_path(src_path)
src_dataset.to_zarr(src_path)
with xr.open_zarr(src_path, decode_cf=False) as src_dataset:
writer.write_dataset(src_dataset, append=i > 0)
self.assertTimeSlicesOk(dst_path, src_path_pat, n)
def test_local_dry_run_for_existing(self):
self.add_path('my.zarr')
ds = new_test_dataset(day=1)
writer = DatasetWriter('my.zarr', output_overwrite=True)
writer.write_dataset(ds)
self.assertTrue(os.path.isdir('my.zarr'))
writer = DatasetWriter('my.zarr', output_overwrite=True, dry_run=True)
writer.write_dataset(ds)
self.assertTrue(os.path.isdir('my.zarr'))
def test_local(self):
self.add_path('my.zarr')
writer = DatasetWriter('my.zarr', output_overwrite=False)
ds = new_test_dataset(day=1)
writer.write_dataset(ds)
self.assertTrue(os.path.isdir('my.zarr'))
ds = new_test_dataset(day=2)
with self.assertRaises(zarr.errors.ContainsGroupError):
writer.write_dataset(ds)
def test_local_overwrite(self):
self.add_path('my.zarr')
writer = DatasetWriter('my.zarr', output_overwrite=False)
ds = new_test_dataset(day=1)
writer.write_dataset(ds)
self.assertTrue(os.path.isdir('my.zarr'))
writer = DatasetWriter('my.zarr', output_overwrite=True)
ds = new_test_dataset(day=2)
writer.write_dataset(ds)
self.assertTrue(os.path.isdir('my.zarr'))
def test_append_to_non_increasing_append_mode_all(self):
dst_path = "my.zarr"
self.add_path(dst_path)
ds1, ds2 = new_append_test_datasets(
["2001-01-01", "2001-01-03", "2001-01-02"],
["2001-01-04", "2001-01-05", "2001-01-06"]
)
ds1.to_zarr(dst_path)
w = DatasetWriter(dst_path, output_append=True, output_append_dim="t",
output_append_mode=AppendMode.all)
w.write_dataset(ds2)
def test_finalize_only_and_append(self):
self.add_path('my.zarr')
writer = DatasetWriter('my.zarr',
finalize_only=True,
output_append=True)
ds = new_test_dataset(day=1)
with self.assertRaises(RuntimeError) as e:
writer.write_dataset(ds)
self.assertEqual(('internal error: cannot write/append'
' datasets when in finalize-only mode',),
e.exception.args)
def test_local_postprocessor(self):
self.add_path('my.zarr')
writer = DatasetWriter(
'my.zarr',
output_overwrite=False,
output_custom_postprocessor='tests.test_writer:my_postprocessor')
ds = new_test_dataset(day=1)
self.assertNotIn('crs', ds)
writer.write_dataset(ds)
self.assertTrue(os.path.isdir('my.zarr'))
with xr.open_zarr('my.zarr', consolidated=False) as ds:
self.assertIn('crs', ds)
def test_finalize_updates_metadata(self):
self.add_path('my.zarr')
writer = DatasetWriter('my.zarr',
output_append=True,
output_metadata=dict(comment='This dataset is a test.'))
for i in range(3):
ds = new_test_dataset(day=i + 1)
writer.write_dataset(ds)
with xr.open_zarr('my.zarr', consolidated=False) as ds:
self.assertNotIn('comment', ds.attrs)
writer.finalize_dataset()
with xr.open_zarr('my.zarr', consolidated=False) as ds:
self.assertIn('comment', ds.attrs)
self.assertEqual('This dataset is a test.', ds.attrs['comment'])
def test_append_non_increasing_append_newer(self):
dst_path = "my.zarr"
self.add_path(dst_path)
ds1, ds2 = new_append_test_datasets(
["2001-01-01", "2001-01-02", "2001-01-03"],
["2001-01-05", "2001-01-04", "2001-01-03", "2001-02-02"]
)
ds1.to_zarr(dst_path)
w = DatasetWriter(dst_path, output_append=True,
output_append_dim="t",
output_append_mode=AppendMode.newer)
with pytest.raises(ValueError,
match="must be increasing"):
w.write_dataset(ds2)
def test_append_overlapping_forbid_overlap(self):
dst_path = "my.zarr"
self.add_path(dst_path)
ds1, ds2 = new_append_test_datasets(
["2001-01-01", "2001-01-02", "2001-01-03"],
["2001-01-02", "2001-01-03", "2001-01-04"]
)
ds1.to_zarr(dst_path)
with pytest.raises(ValueError,
match="may not overlap"):
w = DatasetWriter(dst_path, output_append=True,
output_append_dim="t",
output_append_mode=AppendMode.no_overlap)
w.write_dataset(ds2)
def test_finalize_adjusts_metadata_with_time_bnds(self):
self.add_path('my.zarr')
writer = DatasetWriter('my.zarr', output_append=True,
output_adjust_metadata=True)
for i in range(3):
ds = new_test_dataset(day=i + 1, add_time_bnds=True)
writer.write_dataset(ds)
writer.finalize_dataset()
with xr.open_zarr('my.zarr', consolidated=False) as ds:
self.assertIn('time_coverage_start', ds.attrs)
self.assertEqual('2020-12-01 09:30:00',
ds.attrs['time_coverage_start'])
self.assertIn('time_coverage_end', ds.attrs)
self.assertEqual('2020-12-03 10:30:00',
ds.attrs['time_coverage_end'])
def test_append_with_input_decode_cf(self):
src_path_pat = 'src_{}.zarr'
dst_path = 'my.zarr'
self.add_path(dst_path)
writer = DatasetWriter(dst_path, output_overwrite=False,
input_decode_cf=False)
n = 3
for i in range(0, n):
src_dataset = new_test_dataset(day=i + 1)
src_path = src_path_pat.format(i)
self.add_path(src_path)
src_dataset.to_zarr(src_path)
with xr.open_zarr(src_path, decode_cf=False) as src_dataset:
writer.write_dataset(src_dataset, append=i > 0)
self.assertTimeSlicesOk(dst_path, src_path_pat, n)
def test_append_overlapping_append_newer(self):
for consolidated in False, True:
with self.subTest(consolidated=consolidated):
dst_path = "my.zarr"
self.add_path(dst_path)
ds1, ds2 = new_append_test_datasets(
["2001-01-01", "2001-01-02", "2001-01-03"],
["2001-01-02", "2001-01-03", "2001-01-04", "2001-02-05"]
)
ds1.to_zarr(dst_path, consolidated=consolidated)
w = DatasetWriter(dst_path, output_append=True,
output_append_dim="t",
output_append_mode=AppendMode.newer,
output_consolidated=consolidated)
w.write_dataset(ds2)
ds3 = xr.open_zarr(dst_path, consolidated=consolidated)
expected = np.array(["2001-01-01", "2001-01-02", "2001-01-03",
"2001-01-04", "2001-02-05"],
dtype="datetime64[ns]")
np.testing.assert_equal(expected, ds3.t.data)
def test_finalize_only_and_consolidate_if_specified(self):
self.add_path('my.zarr')
ds = new_test_dataset(day=1)
writer = DatasetWriter('my.zarr',
output_overwrite=True)
writer.write_dataset(ds)
writer.finalize_dataset()
self.assertTrue(os.path.isdir('my.zarr'))
self.assertFalse(os.path.isfile('my.zarr/.zmetadata'))
writer = DatasetWriter('my.zarr',
output_consolidated=True,
finalize_only=True)
writer.finalize_dataset()
self.assertTrue(os.path.isdir('my.zarr'))
self.assertTrue(os.path.isfile('my.zarr/.zmetadata'))
with open('my.zarr/.zmetadata') as fp:
metadata = json.load(fp)
self.assertIn('metadata', metadata)
self.assertEqual({},
metadata['metadata'].get('.zattrs'))
def test_append_overlapping_replace(self):
dst_path = "my.zarr"
self.add_path(dst_path)
ds1, ds2 = new_append_test_datasets(
["2001-01-01", "2001-01-02", "2001-01-03", "2001-01-05"],
["2001-01-02", "2001-01-03", "2001-01-04", "2001-01-06"]
)
ds1.to_zarr(dst_path)
w = DatasetWriter(dst_path, output_append=True,
output_append_dim="t",
output_append_mode=AppendMode.replace,
output_consolidated=False)
w.write_dataset(ds2)
ds3 = xr.open_zarr(dst_path, consolidated=False)
np.testing.assert_equal(
np.array(["2001-01-01", "2001-01-02", "2001-01-03",
"2001-01-04", "2001-01-05", "2001-01-06"],
dtype="datetime64[ns]"), ds3.t.data)
np.testing.assert_equal(
np.array([0, 1, 1, 1, 0, 1]),
ds3.v.isel(x=0, y=0)
)
def test_finalize_adjusts_metadata(self):
self.add_path('my.zarr')
writer = DatasetWriter('my.zarr',
output_append=True,
output_adjust_metadata=True,
input_paths=['a.nc', 'z.zarr', 'b.nc'])
for i in range(3):
ds = new_test_dataset(day=i + 1)
writer.write_dataset(ds)
with xr.open_zarr('my.zarr', consolidated=False) as ds:
self.assertNotIn('history', ds.attrs)
self.assertNotIn('source', ds.attrs)
self.assertNotIn('time_coverage_start', ds.attrs)
self.assertNotIn('time_coverage_end', ds.attrs)
writer.finalize_dataset()
with xr.open_zarr('my.zarr', consolidated=False) as ds:
self.assertIn('history', ds.attrs)
self.assertIn('source', ds.attrs)
self.assertEqual('a.nc, b.nc', ds.attrs['source'])
self.assertIn('time_coverage_start', ds.attrs)
self.assertEqual('2020-12-01 10:00:00', ds.attrs['time_coverage_start'])
self.assertIn('time_coverage_end', ds.attrs)
self.assertEqual('2020-12-03 10:00:00', ds.attrs['time_coverage_end'])
def test_local_dry_run(self):
self.add_path('my.zarr')
writer = DatasetWriter('my.zarr', dry_run=True)
ds = new_test_dataset(day=1)
writer.write_dataset(ds)
self.assertFalse(os.path.isdir('out.zarr'))
def test_aws_s3_with_unknown_bucket(self):
ds = new_test_dataset(day=1)
writer = DatasetWriter(f's3://my{uuid.uuid4()}/my.zarr')
with self.assertRaises(Exception):
# We know this will raise, but our test coverage increases a little bit.
writer.write_dataset(ds)