diff options
Diffstat (limited to 'Lib/test/test_csv.py')
| -rw-r--r-- | Lib/test/test_csv.py | 101 |
1 files changed, 87 insertions, 14 deletions
diff --git a/Lib/test/test_csv.py b/Lib/test/test_csv.py index 77c315edb1..03ab1840dd 100644 --- a/Lib/test/test_csv.py +++ b/Lib/test/test_csv.py @@ -2,9 +2,7 @@ # csv package unit tests import copy -import io import sys -import os import unittest from io import StringIO from tempfile import TemporaryFile @@ -12,6 +10,9 @@ import csv import gc import pickle from test import support +from itertools import permutations +from textwrap import dedent +from collections import OrderedDict class Test_Csv(unittest.TestCase): """ @@ -426,17 +427,16 @@ class TestDialectRegistry(unittest.TestCase): self.assertRaises(TypeError, csv.reader, [], quoting = -1) self.assertRaises(TypeError, csv.reader, [], quoting = 100) - # See issue #22995 - ## def test_copy(self): - ## for name in csv.list_dialects(): - ## dialect = csv.get_dialect(name) - ## self.assertRaises(TypeError, copy.copy, dialect) + def test_copy(self): + for name in csv.list_dialects(): + dialect = csv.get_dialect(name) + self.assertRaises(TypeError, copy.copy, dialect) - ## def test_pickle(self): - ## for name in csv.list_dialects(): - ## dialect = csv.get_dialect(name) - ## for proto in range(pickle.HIGHEST_PROTOCOL + 1): - ## self.assertRaises(TypeError, pickle.dumps, dialect, proto) + def test_pickle(self): + for name in csv.list_dialects(): + dialect = csv.get_dialect(name) + for proto in range(pickle.HIGHEST_PROTOCOL + 1): + self.assertRaises(TypeError, pickle.dumps, dialect, proto) class TestCsvBase(unittest.TestCase): def readerAssertEqual(self, input, expected_result): @@ -626,6 +626,24 @@ class TestDictFields(unittest.TestCase): self.assertNotIn("'f2'", exception) self.assertIn("1", exception) + def test_typo_in_extrasaction_raises_error(self): + fileobj = StringIO() + self.assertRaises(ValueError, csv.DictWriter, fileobj, ['f1', 'f2'], + extrasaction="raised") + + def test_write_field_not_in_field_names_raise(self): + fileobj = StringIO() + writer = csv.DictWriter(fileobj, ['f1', 'f2'], extrasaction="raise") + dictrow = {'f0': 0, 'f1': 1, 'f2': 2, 'f3': 3} + self.assertRaises(ValueError, csv.DictWriter.writerow, writer, dictrow) + + def test_write_field_not_in_field_names_ignore(self): + fileobj = StringIO() + writer = csv.DictWriter(fileobj, ['f1', 'f2'], extrasaction="ignore") + dictrow = {'f0': 0, 'f1': 1, 'f2': 2, 'f3': 3} + csv.DictWriter.writerow(writer, dictrow) + self.assertEqual(fileobj.getvalue(), "1,2\r\n") + def test_read_dict_fields(self): with TemporaryFile("w+") as fileobj: fileobj.write("1,2,abc\r\n") @@ -1080,7 +1098,6 @@ class TestUnicode(unittest.TestCase): "François Pinard"] def test_unicode_read(self): - import io with TemporaryFile("w+", newline='', encoding="utf-8") as fileobj: fileobj.write(",".join(self.names) + "\r\n") fileobj.seek(0) @@ -1089,7 +1106,6 @@ class TestUnicode(unittest.TestCase): def test_unicode_write(self): - import io with TemporaryFile("w+", newline='', encoding="utf-8") as fileobj: writer = csv.writer(fileobj) writer.writerow(self.names) @@ -1097,6 +1113,63 @@ class TestUnicode(unittest.TestCase): fileobj.seek(0) self.assertEqual(fileobj.read(), expected) +class KeyOrderingTest(unittest.TestCase): + + def test_ordering_for_the_dict_reader_and_writer(self): + resultset = set() + for keys in permutations("abcde"): + with TemporaryFile('w+', newline='', encoding="utf-8") as fileobject: + dw = csv.DictWriter(fileobject, keys) + dw.writeheader() + fileobject.seek(0) + dr = csv.DictReader(fileobject) + kt = tuple(dr.fieldnames) + self.assertEqual(keys, kt) + resultset.add(kt) + # Final sanity check: were all permutations unique? + self.assertEqual(len(resultset), 120, "Key ordering: some key permutations not collected (expected 120)") + + def test_ordered_dict_reader(self): + data = dedent('''\ + FirstName,LastName + Eric,Idle + Graham,Chapman,Over1,Over2 + + Under1 + John,Cleese + ''').splitlines() + + self.assertEqual(list(csv.DictReader(data)), + [OrderedDict([('FirstName', 'Eric'), ('LastName', 'Idle')]), + OrderedDict([('FirstName', 'Graham'), ('LastName', 'Chapman'), + (None, ['Over1', 'Over2'])]), + OrderedDict([('FirstName', 'Under1'), ('LastName', None)]), + OrderedDict([('FirstName', 'John'), ('LastName', 'Cleese')]), + ]) + + self.assertEqual(list(csv.DictReader(data, restkey='OtherInfo')), + [OrderedDict([('FirstName', 'Eric'), ('LastName', 'Idle')]), + OrderedDict([('FirstName', 'Graham'), ('LastName', 'Chapman'), + ('OtherInfo', ['Over1', 'Over2'])]), + OrderedDict([('FirstName', 'Under1'), ('LastName', None)]), + OrderedDict([('FirstName', 'John'), ('LastName', 'Cleese')]), + ]) + + del data[0] # Remove the header row + self.assertEqual(list(csv.DictReader(data, fieldnames=['fname', 'lname'])), + [OrderedDict([('fname', 'Eric'), ('lname', 'Idle')]), + OrderedDict([('fname', 'Graham'), ('lname', 'Chapman'), + (None, ['Over1', 'Over2'])]), + OrderedDict([('fname', 'Under1'), ('lname', None)]), + OrderedDict([('fname', 'John'), ('lname', 'Cleese')]), + ]) + + +class MiscTestCase(unittest.TestCase): + def test__all__(self): + extra = {'__doc__', '__version__'} + support.check__all__(self, csv, ('csv', '_csv'), extra=extra) + if __name__ == '__main__': unittest.main() |