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# Test methods with long descriptive names can omit docstrings
# pylint: disable=missing-docstring
import os
import shutil
import tempfile
import unittest
import warnings
from unittest.mock import Mock, patch
from Orange import data
from Orange.data.io import FileFormat, TabReader, CSVReader, PickleReader, ExcelReader
from Orange.data.table import get_sample_datasets_dir
from Orange.data import Table, StringVariable, Domain
from Orange.tests import test_dirname
from Orange.util import OrangeDeprecationWarning
class WildcardReader(FileFormat):
EXTENSIONS = ('.wild', '.wild[0-9]')
DESCRIPTION = "Dummy reader for testing extensions"
def read(self):
pass
class TestChooseReader(unittest.TestCase):
def test_usual_extensions(self):
self.assertIsInstance(FileFormat.get_reader("t.tab"), TabReader)
self.assertIsInstance(FileFormat.get_reader("t.csv"), CSVReader)
self.assertIsInstance(FileFormat.get_reader("t.pkl"), PickleReader)
with self.assertRaises(OSError):
FileFormat.get_reader("test.undefined_extension")
def test_wildcard_extension(self):
self.assertIsInstance(FileFormat.get_reader("t.wild"),
WildcardReader)
self.assertIsInstance(FileFormat.get_reader("t.wild2"),
WildcardReader)
with self.assertRaises(OSError):
FileFormat.get_reader("t.wild2a")
class SameExtension(FileFormat):
PRIORITY = 100
EXTENSIONS = ('.same_extension',)
DESCRIPTION = "Same extension, different priority"
def read(self):
pass
class SameExtensionPreferred(SameExtension):
PRIORITY = 90
class SameExtensionL(SameExtension):
PRIORITY = 110
class TestMultipleSameExtension(unittest.TestCase):
def test_find_reader(self):
reader = FileFormat.get_reader("some.same_extension")
self.assertIsInstance(reader, SameExtensionPreferred)
class TestLocate(unittest.TestCase):
def test_locate_sample_datasets(self):
with self.assertRaises(OSError):
FileFormat.locate("iris.tab",
search_dirs=[os.path.dirname(__file__)])
iris = FileFormat.locate("iris.tab",
search_dirs=[get_sample_datasets_dir()])
self.assertEqual(os.path.basename(iris), "iris.tab")
# test extension adding
iris = FileFormat.locate("iris",
search_dirs=[get_sample_datasets_dir()])
self.assertEqual(os.path.basename(iris), "iris.tab")
def test_locate_wildcard_extension(self):
tempdir = tempfile.mkdtemp()
with self.assertRaises(OSError):
FileFormat.locate("t.wild9", search_dirs=[tempdir])
fn = os.path.join(tempdir, "t.wild8")
with open(fn, "wt") as f:
f.write("\n")
location = FileFormat.locate("t.wild8", search_dirs=[tempdir])
self.assertEqual(location, fn)
# test extension adding
location = FileFormat.locate("t", search_dirs=[tempdir])
self.assertEqual(location, fn)
shutil.rmtree(tempdir)
class TestReader(unittest.TestCase):
def setUp(self):
data.table.dataset_dirs.append(test_dirname())
def tearDown(self):
data.table.dataset_dirs.remove(test_dirname())
def test_open_bad_pickle(self):
"""
Raise TypeError when PickleReader reads a pickle
file without a table (and it suppose to be there).
GH-2232
"""
reader = PickleReader("")
with unittest.mock.patch("pickle.load", return_value=None):
self.assertRaises(TypeError, reader.read, "foo")
def test_empty_columns(self):
"""Can't read files with more columns then headers. GH-1417"""
samplefile = """\
a, b
1, 0,
1, 2,
"""
with tempfile.NamedTemporaryFile(mode="w+", delete=False) as tmp:
tmp.write(samplefile)
with self.assertWarns(UserWarning) as cm:
table = CSVReader(tmp.name).read()
os.unlink(tmp.name)
self.assertEqual(len(table.domain.attributes), 2)
self.assertEqual(cm.warning.args[0], "Columns with no headers were removed.")
def test_type_annotations(self):
class FooFormat(FileFormat):
write_file = Mock()
FooFormat.write('test_file', None)
FooFormat.write_file.assert_called_with('test_file', None)
FooFormat.OPTIONAL_TYPE_ANNOTATIONS = True
FooFormat.write('test_file', None)
FooFormat.write_file.assert_called_with('test_file', None, True)
FooFormat.write('test_file', None, False)
FooFormat.write_file.assert_called_with('test_file', None, False)
FooFormat.OPTIONAL_TYPE_ANNOTATIONS = False
FooFormat.write('test_file', None)
FooFormat.write_file.assert_called_with('test_file', None)
@patch('csv.DictWriter.writerow')
def test_header_call(self, writer):
CSVReader.write_headers(writer, Table("iris"), False)
self.assertEqual(len(writer.call_args_list), 1)
writer.reset_mock()
CSVReader.write_headers(writer, Table("iris"), True)
self.assertEqual(len(writer.call_args_list), 3)
def test_load_pickle(self):
"""
This function tests whether pickled files in older Orange loads
correctly with newer version of Orange.
"""
with warnings.catch_warnings():
# in unittests on travis/github actions OrangeDeprecationWarning
# is raised as an error. With this statement it is disabled only
# for this test - when unpickling pickle created with version older
# than 3.27 ordered parameter in DiscreteVariable which is
# deprecated still appears - which will raise deprecation warning
warnings.simplefilter('default', OrangeDeprecationWarning)
# load pickles created with Orange 3.20
# in next version there is a change in variables.py - line 738
# which broke back compatibility - tests introduced after the fix
data1 = Table("datasets/sailing-orange-3-20.pkl")
data2 = Table("datasets/sailing-orange-3-20.pkl.gz")
# load pickles created with Orange 3.21
data3 = Table("datasets/sailing-orange-3-21.pkl")
data4 = Table("datasets/sailing-orange-3-21.pkl.gz")
examples_count = 20
self.assertEqual(examples_count, len(data1))
self.assertEqual(examples_count, len(data2))
self.assertEqual(examples_count, len(data3))
self.assertEqual(examples_count, len(data4))
attributes_count = 3
self.assertEqual(attributes_count, len(data1.domain.attributes))
self.assertEqual(attributes_count, len(data2.domain.attributes))
self.assertEqual(attributes_count, len(data3.domain.attributes))
self.assertEqual(attributes_count, len(data4.domain.attributes))
def test_update_origin(self):
"""
Test if origin attributes is changed if path doesn't exist. For example
when file moved to another computer. It tested only one scenario
all other scenarios are tested as part of update_origin function tests.
"""
with tempfile.TemporaryDirectory() as dir_name:
os.mkdir(os.path.join(dir_name, "subdir"))
var = StringVariable("Files")
var.attributes["origin"] = "/a/b/c/d/subdir"
table = Table.from_list(Domain([], metas=[var]), ["f1", "f2"])
for reader in (CSVReader, TabReader, PickleReader, ExcelReader):
dataset = os.path.join(dir_name, f"dataset{reader.EXTENSIONS[0]}")
if reader is PickleReader:
reader.write_file(dataset, table)
else:
reader.write_file(dataset, table, with_annotations=True)
table = Table.from_file(dataset)
self.assertEqual(
os.path.join(dir_name, "subdir"),
table.domain["Files"].attributes["origin"],
)
if __name__ == "__main__":
unittest.main()
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