def test_compare_netcdf_attrs(dummy_nc):
"""Check that comparing attributes identifies the changed attribute"""
actual_nc, expected_nc = dummy_nc
expected_ds = nc.Dataset(expected_nc, mode='r')
actual_ds = nc.Dataset(actual_nc, mode='a')
messages_reported = []
def message_collector(message):
messages_reported.append(message)
# Check that attributes initially match - message_collector is not called
compare.compare_attributes("root", actual_ds, expected_ds,
message_collector)
assert len(messages_reported) == 0
# Check modifying a simple attribute
actual_ds.setncattr("float_number", 3.2)
compare.compare_attributes("root", actual_ds, expected_ds,
message_collector)
assert len(messages_reported) == 1
assert "float_number" in messages_reported[0]
assert "3.2" in messages_reported[0]
assert "1.5" in messages_reported[0]
# Reset attribute back to original value
actual_ds.setncattr("float_number", 1.5)
messages_reported = []
# Check modifying an array attribute
actual_ds[CAT].setncattr("additional_numbers", np.linspace(0.0, 0.8, 11))
compare.compare_attributes("root", actual_ds[CAT], expected_ds[CAT],
message_collector)
assert len(messages_reported) == 1
assert "additional_numbers" in messages_reported[0]
# Reset attribute back to original value
actual_ds[CAT].setncattr("additional_numbers", np.linspace(0.0, 1.0, 11))
messages_reported = []
# Check adding another attribute
actual_ds.setncattr("extra", "additional")
compare.compare_attributes("longer name", actual_ds, expected_ds,
message_collector)
assert len(messages_reported) == 1
assert "longer name" in messages_reported[0]
# The difference message should mention the attribute which was added
assert "extra" in messages_reported[0]
# Remove added attribute
actual_ds.delncattr("extra")
messages_reported = []
# Check removing an attribute
actual_ds.delncattr("float_number")
compare.compare_attributes("root", actual_ds, expected_ds,
message_collector)
assert len(messages_reported) == 1
assert "float_number" in messages_reported[0]
def test_ignore_netcdf_attrs(dummy_nc):
"""Check that changes to ignored attributes are ignored."""
actual_nc, expected_nc = dummy_nc
expected_ds = nc.Dataset(expected_nc, mode="r")
actual_ds = nc.Dataset(actual_nc, mode="a")
messages_reported = []
def message_collector(message):
messages_reported.append(message)
# Check modifying a simple attribute
actual_ds.setncattr("float_number", 3.2)
compare.compare_attributes(
"root",
actual_ds,
expected_ds,
["float_number"],
message_collector,
)
assert len(messages_reported) == 0
# Reset attribute back to original value
actual_ds.setncattr("float_number", 1.5)
messages_reported = []
# Check adding another attribute
actual_ds.setncattr("extra", "additional")
compare.compare_attributes(
"longer name",
actual_ds,
expected_ds,
["extra"],
message_collector,
)
assert len(messages_reported) == 0
# Remove added attribute
actual_ds.delncattr("extra")
messages_reported = []
# Check removing an attribute
actual_ds.delncattr("float_number")
compare.compare_attributes(
"root",
actual_ds,
expected_ds,
["float_number"],
message_collector,
)
assert len(messages_reported) == 0