| # Copyright (C) 2001,2002 Python Software Foundation | |
| # csv package unit tests | |
| import copy | |
| import sys | |
| import unittest | |
| from io import StringIO | |
| from tempfile import TemporaryFile | |
| import csv | |
| import gc | |
| import pickle | |
| from test import support | |
| from test.support import warnings_helper | |
| from itertools import permutations | |
| from textwrap import dedent | |
| from collections import OrderedDict | |
| class BadIterable: | |
| def __iter__(self): | |
| raise OSError | |
| class Test_Csv(unittest.TestCase): | |
| """ | |
| Test the underlying C csv parser in ways that are not appropriate | |
| from the high level interface. Further tests of this nature are done | |
| in TestDialectRegistry. | |
| """ | |
| def _test_arg_valid(self, ctor, arg): | |
| self.assertRaises(TypeError, ctor) | |
| self.assertRaises(TypeError, ctor, None) | |
| self.assertRaises(TypeError, ctor, arg, bad_attr = 0) | |
| self.assertRaises(TypeError, ctor, arg, delimiter = 0) | |
| self.assertRaises(TypeError, ctor, arg, delimiter = 'XX') | |
| self.assertRaises(csv.Error, ctor, arg, 'foo') | |
| self.assertRaises(TypeError, ctor, arg, delimiter=None) | |
| self.assertRaises(TypeError, ctor, arg, delimiter=1) | |
| self.assertRaises(TypeError, ctor, arg, quotechar=1) | |
| self.assertRaises(TypeError, ctor, arg, lineterminator=None) | |
| self.assertRaises(TypeError, ctor, arg, lineterminator=1) | |
| self.assertRaises(TypeError, ctor, arg, quoting=None) | |
| self.assertRaises(TypeError, ctor, arg, | |
| quoting=csv.QUOTE_ALL, quotechar='') | |
| self.assertRaises(TypeError, ctor, arg, | |
| quoting=csv.QUOTE_ALL, quotechar=None) | |
| def test_reader_arg_valid(self): | |
| self._test_arg_valid(csv.reader, []) | |
| self.assertRaises(OSError, csv.reader, BadIterable()) | |
| def test_writer_arg_valid(self): | |
| self._test_arg_valid(csv.writer, StringIO()) | |
| class BadWriter: | |
| @property | |
| def write(self): | |
| raise OSError | |
| self.assertRaises(OSError, csv.writer, BadWriter()) | |
| def _test_default_attrs(self, ctor, *args): | |
| obj = ctor(*args) | |
| # Check defaults | |
| self.assertEqual(obj.dialect.delimiter, ',') | |
| self.assertIs(obj.dialect.doublequote, True) | |
| self.assertEqual(obj.dialect.escapechar, None) | |
| self.assertEqual(obj.dialect.lineterminator, "\r\n") | |
| self.assertEqual(obj.dialect.quotechar, '"') | |
| self.assertEqual(obj.dialect.quoting, csv.QUOTE_MINIMAL) | |
| self.assertIs(obj.dialect.skipinitialspace, False) | |
| self.assertIs(obj.dialect.strict, False) | |
| # Try deleting or changing attributes (they are read-only) | |
| self.assertRaises(AttributeError, delattr, obj.dialect, 'delimiter') | |
| self.assertRaises(AttributeError, setattr, obj.dialect, 'delimiter', ':') | |
| self.assertRaises(AttributeError, delattr, obj.dialect, 'quoting') | |
| self.assertRaises(AttributeError, setattr, obj.dialect, | |
| 'quoting', None) | |
| def test_reader_attrs(self): | |
| self._test_default_attrs(csv.reader, []) | |
| def test_writer_attrs(self): | |
| self._test_default_attrs(csv.writer, StringIO()) | |
| def _test_kw_attrs(self, ctor, *args): | |
| # Now try with alternate options | |
| kwargs = dict(delimiter=':', doublequote=False, escapechar='\\', | |
| lineterminator='\r', quotechar='*', | |
| quoting=csv.QUOTE_NONE, skipinitialspace=True, | |
| strict=True) | |
| obj = ctor(*args, **kwargs) | |
| self.assertEqual(obj.dialect.delimiter, ':') | |
| self.assertIs(obj.dialect.doublequote, False) | |
| self.assertEqual(obj.dialect.escapechar, '\\') | |
| self.assertEqual(obj.dialect.lineterminator, "\r") | |
| self.assertEqual(obj.dialect.quotechar, '*') | |
| self.assertEqual(obj.dialect.quoting, csv.QUOTE_NONE) | |
| self.assertIs(obj.dialect.skipinitialspace, True) | |
| self.assertIs(obj.dialect.strict, True) | |
| def test_reader_kw_attrs(self): | |
| self._test_kw_attrs(csv.reader, []) | |
| def test_writer_kw_attrs(self): | |
| self._test_kw_attrs(csv.writer, StringIO()) | |
| def _test_dialect_attrs(self, ctor, *args): | |
| # Now try with dialect-derived options | |
| class dialect: | |
| delimiter='-' | |
| doublequote=False | |
| escapechar='^' | |
| lineterminator='$' | |
| quotechar='#' | |
| quoting=csv.QUOTE_ALL | |
| skipinitialspace=True | |
| strict=False | |
| args = args + (dialect,) | |
| obj = ctor(*args) | |
| self.assertEqual(obj.dialect.delimiter, '-') | |
| self.assertIs(obj.dialect.doublequote, False) | |
| self.assertEqual(obj.dialect.escapechar, '^') | |
| self.assertEqual(obj.dialect.lineterminator, "$") | |
| self.assertEqual(obj.dialect.quotechar, '#') | |
| self.assertEqual(obj.dialect.quoting, csv.QUOTE_ALL) | |
| self.assertIs(obj.dialect.skipinitialspace, True) | |
| self.assertIs(obj.dialect.strict, False) | |
| def test_reader_dialect_attrs(self): | |
| self._test_dialect_attrs(csv.reader, []) | |
| def test_writer_dialect_attrs(self): | |
| self._test_dialect_attrs(csv.writer, StringIO()) | |
| def _write_test(self, fields, expect, **kwargs): | |
| with TemporaryFile("w+", encoding="utf-8", newline='') as fileobj: | |
| writer = csv.writer(fileobj, **kwargs) | |
| writer.writerow(fields) | |
| fileobj.seek(0) | |
| self.assertEqual(fileobj.read(), | |
| expect + writer.dialect.lineterminator) | |
| def _write_error_test(self, exc, fields, **kwargs): | |
| with TemporaryFile("w+", encoding="utf-8", newline='') as fileobj: | |
| writer = csv.writer(fileobj, **kwargs) | |
| with self.assertRaises(exc): | |
| writer.writerow(fields) | |
| fileobj.seek(0) | |
| self.assertEqual(fileobj.read(), '') | |
| def test_write_arg_valid(self): | |
| self._write_error_test(csv.Error, None) | |
| self._write_test((), '') | |
| self._write_test([None], '""') | |
| self._write_error_test(csv.Error, [None], quoting = csv.QUOTE_NONE) | |
| # Check that exceptions are passed up the chain | |
| self._write_error_test(OSError, BadIterable()) | |
| class BadList: | |
| def __len__(self): | |
| return 10 | |
| def __getitem__(self, i): | |
| if i > 2: | |
| raise OSError | |
| self._write_error_test(OSError, BadList()) | |
| class BadItem: | |
| def __str__(self): | |
| raise OSError | |
| self._write_error_test(OSError, [BadItem()]) | |
| def test_write_bigfield(self): | |
| # This exercises the buffer realloc functionality | |
| bigstring = 'X' * 50000 | |
| self._write_test([bigstring,bigstring], '%s,%s' % \ | |
| (bigstring, bigstring)) | |
| def test_write_quoting(self): | |
| self._write_test(['a',1,'p,q'], 'a,1,"p,q"') | |
| self._write_error_test(csv.Error, ['a',1,'p,q'], | |
| quoting = csv.QUOTE_NONE) | |
| self._write_test(['a',1,'p,q'], 'a,1,"p,q"', | |
| quoting = csv.QUOTE_MINIMAL) | |
| self._write_test(['a',1,'p,q'], '"a",1,"p,q"', | |
| quoting = csv.QUOTE_NONNUMERIC) | |
| self._write_test(['a',1,'p,q'], '"a","1","p,q"', | |
| quoting = csv.QUOTE_ALL) | |
| self._write_test(['a\nb',1], '"a\nb","1"', | |
| quoting = csv.QUOTE_ALL) | |
| def test_write_escape(self): | |
| self._write_test(['a',1,'p,q'], 'a,1,"p,q"', | |
| escapechar='\\') | |
| self._write_error_test(csv.Error, ['a',1,'p,"q"'], | |
| escapechar=None, doublequote=False) | |
| self._write_test(['a',1,'p,"q"'], 'a,1,"p,\\"q\\""', | |
| escapechar='\\', doublequote = False) | |
| self._write_test(['"'], '""""', | |
| escapechar='\\', quoting = csv.QUOTE_MINIMAL) | |
| self._write_test(['"'], '\\"', | |
| escapechar='\\', quoting = csv.QUOTE_MINIMAL, | |
| doublequote = False) | |
| self._write_test(['"'], '\\"', | |
| escapechar='\\', quoting = csv.QUOTE_NONE) | |
| self._write_test(['a',1,'p,q'], 'a,1,p\\,q', | |
| escapechar='\\', quoting = csv.QUOTE_NONE) | |
| self._write_test(['\\', 'a'], '\\\\,a', | |
| escapechar='\\', quoting=csv.QUOTE_NONE) | |
| self._write_test(['\\', 'a'], '\\\\,a', | |
| escapechar='\\', quoting=csv.QUOTE_MINIMAL) | |
| self._write_test(['\\', 'a'], '"\\\\","a"', | |
| escapechar='\\', quoting=csv.QUOTE_ALL) | |
| self._write_test(['\\ ', 'a'], '\\\\ ,a', | |
| escapechar='\\', quoting=csv.QUOTE_MINIMAL) | |
| self._write_test(['\\,', 'a'], '\\\\\\,,a', | |
| escapechar='\\', quoting=csv.QUOTE_NONE) | |
| self._write_test([',\\', 'a'], '",\\\\",a', | |
| escapechar='\\', quoting=csv.QUOTE_MINIMAL) | |
| self._write_test(['C\\', '6', '7', 'X"'], 'C\\\\,6,7,"X"""', | |
| escapechar='\\', quoting=csv.QUOTE_MINIMAL) | |
| def test_write_iterable(self): | |
| self._write_test(iter(['a', 1, 'p,q']), 'a,1,"p,q"') | |
| self._write_test(iter(['a', 1, None]), 'a,1,') | |
| self._write_test(iter([]), '') | |
| self._write_test(iter([None]), '""') | |
| self._write_error_test(csv.Error, iter([None]), quoting=csv.QUOTE_NONE) | |
| self._write_test(iter([None, None]), ',') | |
| def test_writerows(self): | |
| class BrokenFile: | |
| def write(self, buf): | |
| raise OSError | |
| writer = csv.writer(BrokenFile()) | |
| self.assertRaises(OSError, writer.writerows, [['a']]) | |
| with TemporaryFile("w+", encoding="utf-8", newline='') as fileobj: | |
| writer = csv.writer(fileobj) | |
| self.assertRaises(TypeError, writer.writerows, None) | |
| writer.writerows([['a', 'b'], ['c', 'd']]) | |
| fileobj.seek(0) | |
| self.assertEqual(fileobj.read(), "a,b\r\nc,d\r\n") | |
| def test_writerows_with_none(self): | |
| with TemporaryFile("w+", encoding="utf-8", newline='') as fileobj: | |
| writer = csv.writer(fileobj) | |
| writer.writerows([['a', None], [None, 'd']]) | |
| fileobj.seek(0) | |
| self.assertEqual(fileobj.read(), "a,\r\n,d\r\n") | |
| with TemporaryFile("w+", encoding="utf-8", newline='') as fileobj: | |
| writer = csv.writer(fileobj) | |
| writer.writerows([[None], ['a']]) | |
| fileobj.seek(0) | |
| self.assertEqual(fileobj.read(), '""\r\na\r\n') | |
| with TemporaryFile("w+", encoding="utf-8", newline='') as fileobj: | |
| writer = csv.writer(fileobj) | |
| writer.writerows([['a'], [None]]) | |
| fileobj.seek(0) | |
| self.assertEqual(fileobj.read(), 'a\r\n""\r\n') | |
| def test_writerows_errors(self): | |
| with TemporaryFile("w+", encoding="utf-8", newline='') as fileobj: | |
| writer = csv.writer(fileobj) | |
| self.assertRaises(TypeError, writer.writerows, None) | |
| self.assertRaises(OSError, writer.writerows, BadIterable()) | |
| @support.cpython_only | |
| @support.requires_legacy_unicode_capi | |
| @warnings_helper.ignore_warnings(category=DeprecationWarning) | |
| def test_writerows_legacy_strings(self): | |
| import _testcapi | |
| c = _testcapi.unicode_legacy_string('a') | |
| with TemporaryFile("w+", encoding="utf-8", newline='') as fileobj: | |
| writer = csv.writer(fileobj) | |
| writer.writerows([[c]]) | |
| fileobj.seek(0) | |
| self.assertEqual(fileobj.read(), "a\r\n") | |
| def _read_test(self, input, expect, **kwargs): | |
| reader = csv.reader(input, **kwargs) | |
| result = list(reader) | |
| self.assertEqual(result, expect) | |
| def test_read_oddinputs(self): | |
| self._read_test([], []) | |
| self._read_test([''], [[]]) | |
| self.assertRaises(csv.Error, self._read_test, | |
| ['"ab"c'], None, strict = 1) | |
| # cannot handle null bytes for the moment | |
| self.assertRaises(csv.Error, self._read_test, | |
| ['ab\0c'], None, strict = 1) | |
| self._read_test(['"ab"c'], [['abc']], doublequote = 0) | |
| self.assertRaises(csv.Error, self._read_test, | |
| [b'ab\0c'], None) | |
| def test_read_eol(self): | |
| self._read_test(['a,b'], [['a','b']]) | |
| self._read_test(['a,b\n'], [['a','b']]) | |
| self._read_test(['a,b\r\n'], [['a','b']]) | |
| self._read_test(['a,b\r'], [['a','b']]) | |
| self.assertRaises(csv.Error, self._read_test, ['a,b\rc,d'], []) | |
| self.assertRaises(csv.Error, self._read_test, ['a,b\nc,d'], []) | |
| self.assertRaises(csv.Error, self._read_test, ['a,b\r\nc,d'], []) | |
| def test_read_eof(self): | |
| self._read_test(['a,"'], [['a', '']]) | |
| self._read_test(['"a'], [['a']]) | |
| self._read_test(['^'], [['\n']], escapechar='^') | |
| self.assertRaises(csv.Error, self._read_test, ['a,"'], [], strict=True) | |
| self.assertRaises(csv.Error, self._read_test, ['"a'], [], strict=True) | |
| self.assertRaises(csv.Error, self._read_test, | |
| ['^'], [], escapechar='^', strict=True) | |
| def test_read_escape(self): | |
| self._read_test(['a,\\b,c'], [['a', 'b', 'c']], escapechar='\\') | |
| self._read_test(['a,b\\,c'], [['a', 'b,c']], escapechar='\\') | |
| self._read_test(['a,"b\\,c"'], [['a', 'b,c']], escapechar='\\') | |
| self._read_test(['a,"b,\\c"'], [['a', 'b,c']], escapechar='\\') | |
| self._read_test(['a,"b,c\\""'], [['a', 'b,c"']], escapechar='\\') | |
| self._read_test(['a,"b,c"\\'], [['a', 'b,c\\']], escapechar='\\') | |
| def test_read_quoting(self): | |
| self._read_test(['1,",3,",5'], [['1', ',3,', '5']]) | |
| self._read_test(['1,",3,",5'], [['1', '"', '3', '"', '5']], | |
| quotechar=None, escapechar='\\') | |
| self._read_test(['1,",3,",5'], [['1', '"', '3', '"', '5']], | |
| quoting=csv.QUOTE_NONE, escapechar='\\') | |
| # will this fail where locale uses comma for decimals? | |
| self._read_test([',3,"5",7.3, 9'], [['', 3, '5', 7.3, 9]], | |
| quoting=csv.QUOTE_NONNUMERIC) | |
| self._read_test(['"a\nb", 7'], [['a\nb', ' 7']]) | |
| self.assertRaises(ValueError, self._read_test, | |
| ['abc,3'], [[]], | |
| quoting=csv.QUOTE_NONNUMERIC) | |
| def test_read_bigfield(self): | |
| # This exercises the buffer realloc functionality and field size | |
| # limits. | |
| limit = csv.field_size_limit() | |
| try: | |
| size = 50000 | |
| bigstring = 'X' * size | |
| bigline = '%s,%s' % (bigstring, bigstring) | |
| self._read_test([bigline], [[bigstring, bigstring]]) | |
| csv.field_size_limit(size) | |
| self._read_test([bigline], [[bigstring, bigstring]]) | |
| self.assertEqual(csv.field_size_limit(), size) | |
| csv.field_size_limit(size-1) | |
| self.assertRaises(csv.Error, self._read_test, [bigline], []) | |
| self.assertRaises(TypeError, csv.field_size_limit, None) | |
| self.assertRaises(TypeError, csv.field_size_limit, 1, None) | |
| finally: | |
| csv.field_size_limit(limit) | |
| def test_read_linenum(self): | |
| r = csv.reader(['line,1', 'line,2', 'line,3']) | |
| self.assertEqual(r.line_num, 0) | |
| next(r) | |
| self.assertEqual(r.line_num, 1) | |
| next(r) | |
| self.assertEqual(r.line_num, 2) | |
| next(r) | |
| self.assertEqual(r.line_num, 3) | |
| self.assertRaises(StopIteration, next, r) | |
| self.assertEqual(r.line_num, 3) | |
| def test_roundtrip_quoteed_newlines(self): | |
| with TemporaryFile("w+", encoding="utf-8", newline='') as fileobj: | |
| writer = csv.writer(fileobj) | |
| rows = [['a\nb','b'],['c','x\r\nd']] | |
| writer.writerows(rows) | |
| fileobj.seek(0) | |
| for i, row in enumerate(csv.reader(fileobj)): | |
| self.assertEqual(row, rows[i]) | |
| def test_roundtrip_escaped_unquoted_newlines(self): | |
| with TemporaryFile("w+", encoding="utf-8", newline='') as fileobj: | |
| writer = csv.writer(fileobj,quoting=csv.QUOTE_NONE,escapechar="\\") | |
| rows = [['a\nb','b'],['c','x\r\nd']] | |
| writer.writerows(rows) | |
| fileobj.seek(0) | |
| for i, row in enumerate(csv.reader(fileobj,quoting=csv.QUOTE_NONE,escapechar="\\")): | |
| self.assertEqual(row,rows[i]) | |
| class TestDialectRegistry(unittest.TestCase): | |
| def test_registry_badargs(self): | |
| self.assertRaises(TypeError, csv.list_dialects, None) | |
| self.assertRaises(TypeError, csv.get_dialect) | |
| self.assertRaises(csv.Error, csv.get_dialect, None) | |
| self.assertRaises(csv.Error, csv.get_dialect, "nonesuch") | |
| self.assertRaises(TypeError, csv.unregister_dialect) | |
| self.assertRaises(csv.Error, csv.unregister_dialect, None) | |
| self.assertRaises(csv.Error, csv.unregister_dialect, "nonesuch") | |
| self.assertRaises(TypeError, csv.register_dialect, None) | |
| self.assertRaises(TypeError, csv.register_dialect, None, None) | |
| self.assertRaises(TypeError, csv.register_dialect, "nonesuch", 0, 0) | |
| self.assertRaises(TypeError, csv.register_dialect, "nonesuch", | |
| badargument=None) | |
| self.assertRaises(TypeError, csv.register_dialect, "nonesuch", | |
| quoting=None) | |
| self.assertRaises(TypeError, csv.register_dialect, []) | |
| def test_registry(self): | |
| class myexceltsv(csv.excel): | |
| delimiter = "\t" | |
| name = "myexceltsv" | |
| expected_dialects = csv.list_dialects() + [name] | |
| expected_dialects.sort() | |
| csv.register_dialect(name, myexceltsv) | |
| self.addCleanup(csv.unregister_dialect, name) | |
| self.assertEqual(csv.get_dialect(name).delimiter, '\t') | |
| got_dialects = sorted(csv.list_dialects()) | |
| self.assertEqual(expected_dialects, got_dialects) | |
| def test_register_kwargs(self): | |
| name = 'fedcba' | |
| csv.register_dialect(name, delimiter=';') | |
| self.addCleanup(csv.unregister_dialect, name) | |
| self.assertEqual(csv.get_dialect(name).delimiter, ';') | |
| self.assertEqual([['X', 'Y', 'Z']], list(csv.reader(['X;Y;Z'], name))) | |
| def test_incomplete_dialect(self): | |
| class myexceltsv(csv.Dialect): | |
| delimiter = "\t" | |
| self.assertRaises(csv.Error, myexceltsv) | |
| def test_space_dialect(self): | |
| class space(csv.excel): | |
| delimiter = " " | |
| quoting = csv.QUOTE_NONE | |
| escapechar = "\\" | |
| with TemporaryFile("w+", encoding="utf-8") as fileobj: | |
| fileobj.write("abc def\nc1ccccc1 benzene\n") | |
| fileobj.seek(0) | |
| reader = csv.reader(fileobj, dialect=space()) | |
| self.assertEqual(next(reader), ["abc", "def"]) | |
| self.assertEqual(next(reader), ["c1ccccc1", "benzene"]) | |
| def compare_dialect_123(self, expected, *writeargs, **kwwriteargs): | |
| with TemporaryFile("w+", newline='', encoding="utf-8") as fileobj: | |
| writer = csv.writer(fileobj, *writeargs, **kwwriteargs) | |
| writer.writerow([1,2,3]) | |
| fileobj.seek(0) | |
| self.assertEqual(fileobj.read(), expected) | |
| def test_dialect_apply(self): | |
| class testA(csv.excel): | |
| delimiter = "\t" | |
| class testB(csv.excel): | |
| delimiter = ":" | |
| class testC(csv.excel): | |
| delimiter = "|" | |
| class testUni(csv.excel): | |
| delimiter = "\u039B" | |
| class unspecified(): | |
| # A class to pass as dialect but with no dialect attributes. | |
| pass | |
| csv.register_dialect('testC', testC) | |
| try: | |
| self.compare_dialect_123("1,2,3\r\n") | |
| self.compare_dialect_123("1,2,3\r\n", dialect=None) | |
| self.compare_dialect_123("1,2,3\r\n", dialect=unspecified) | |
| self.compare_dialect_123("1\t2\t3\r\n", testA) | |
| self.compare_dialect_123("1:2:3\r\n", dialect=testB()) | |
| self.compare_dialect_123("1|2|3\r\n", dialect='testC') | |
| self.compare_dialect_123("1;2;3\r\n", dialect=testA, | |
| delimiter=';') | |
| self.compare_dialect_123("1\u039B2\u039B3\r\n", | |
| dialect=testUni) | |
| finally: | |
| csv.unregister_dialect('testC') | |
| def test_bad_dialect(self): | |
| # Unknown parameter | |
| self.assertRaises(TypeError, csv.reader, [], bad_attr = 0) | |
| # Bad values | |
| self.assertRaises(TypeError, csv.reader, [], delimiter = None) | |
| self.assertRaises(TypeError, csv.reader, [], quoting = -1) | |
| self.assertRaises(TypeError, csv.reader, [], quoting = 100) | |
| 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) | |
| class TestCsvBase(unittest.TestCase): | |
| def readerAssertEqual(self, input, expected_result): | |
| with TemporaryFile("w+", encoding="utf-8", newline='') as fileobj: | |
| fileobj.write(input) | |
| fileobj.seek(0) | |
| reader = csv.reader(fileobj, dialect = self.dialect) | |
| fields = list(reader) | |
| self.assertEqual(fields, expected_result) | |
| def writerAssertEqual(self, input, expected_result): | |
| with TemporaryFile("w+", encoding="utf-8", newline='') as fileobj: | |
| writer = csv.writer(fileobj, dialect = self.dialect) | |
| writer.writerows(input) | |
| fileobj.seek(0) | |
| self.assertEqual(fileobj.read(), expected_result) | |
| class TestDialectExcel(TestCsvBase): | |
| dialect = 'excel' | |
| def test_single(self): | |
| self.readerAssertEqual('abc', [['abc']]) | |
| def test_simple(self): | |
| self.readerAssertEqual('1,2,3,4,5', [['1','2','3','4','5']]) | |
| def test_blankline(self): | |
| self.readerAssertEqual('', []) | |
| def test_empty_fields(self): | |
| self.readerAssertEqual(',', [['', '']]) | |
| def test_singlequoted(self): | |
| self.readerAssertEqual('""', [['']]) | |
| def test_singlequoted_left_empty(self): | |
| self.readerAssertEqual('"",', [['','']]) | |
| def test_singlequoted_right_empty(self): | |
| self.readerAssertEqual(',""', [['','']]) | |
| def test_single_quoted_quote(self): | |
| self.readerAssertEqual('""""', [['"']]) | |
| def test_quoted_quotes(self): | |
| self.readerAssertEqual('""""""', [['""']]) | |
| def test_inline_quote(self): | |
| self.readerAssertEqual('a""b', [['a""b']]) | |
| def test_inline_quotes(self): | |
| self.readerAssertEqual('a"b"c', [['a"b"c']]) | |
| def test_quotes_and_more(self): | |
| # Excel would never write a field containing '"a"b', but when | |
| # reading one, it will return 'ab'. | |
| self.readerAssertEqual('"a"b', [['ab']]) | |
| def test_lone_quote(self): | |
| self.readerAssertEqual('a"b', [['a"b']]) | |
| def test_quote_and_quote(self): | |
| # Excel would never write a field containing '"a" "b"', but when | |
| # reading one, it will return 'a "b"'. | |
| self.readerAssertEqual('"a" "b"', [['a "b"']]) | |
| def test_space_and_quote(self): | |
| self.readerAssertEqual(' "a"', [[' "a"']]) | |
| def test_quoted(self): | |
| self.readerAssertEqual('1,2,3,"I think, therefore I am",5,6', | |
| [['1', '2', '3', | |
| 'I think, therefore I am', | |
| '5', '6']]) | |
| def test_quoted_quote(self): | |
| self.readerAssertEqual('1,2,3,"""I see,"" said the blind man","as he picked up his hammer and saw"', | |
| [['1', '2', '3', | |
| '"I see," said the blind man', | |
| 'as he picked up his hammer and saw']]) | |
| def test_quoted_nl(self): | |
| input = '''\ | |
| 1,2,3,"""I see,"" | |
| said the blind man","as he picked up his | |
| hammer and saw" | |
| 9,8,7,6''' | |
| self.readerAssertEqual(input, | |
| [['1', '2', '3', | |
| '"I see,"\nsaid the blind man', | |
| 'as he picked up his\nhammer and saw'], | |
| ['9','8','7','6']]) | |
| def test_dubious_quote(self): | |
| self.readerAssertEqual('12,12,1",', [['12', '12', '1"', '']]) | |
| def test_null(self): | |
| self.writerAssertEqual([], '') | |
| def test_single_writer(self): | |
| self.writerAssertEqual([['abc']], 'abc\r\n') | |
| def test_simple_writer(self): | |
| self.writerAssertEqual([[1, 2, 'abc', 3, 4]], '1,2,abc,3,4\r\n') | |
| def test_quotes(self): | |
| self.writerAssertEqual([[1, 2, 'a"bc"', 3, 4]], '1,2,"a""bc""",3,4\r\n') | |
| def test_quote_fieldsep(self): | |
| self.writerAssertEqual([['abc,def']], '"abc,def"\r\n') | |
| def test_newlines(self): | |
| self.writerAssertEqual([[1, 2, 'a\nbc', 3, 4]], '1,2,"a\nbc",3,4\r\n') | |
| class EscapedExcel(csv.excel): | |
| quoting = csv.QUOTE_NONE | |
| escapechar = '\\' | |
| class TestEscapedExcel(TestCsvBase): | |
| dialect = EscapedExcel() | |
| def test_escape_fieldsep(self): | |
| self.writerAssertEqual([['abc,def']], 'abc\\,def\r\n') | |
| def test_read_escape_fieldsep(self): | |
| self.readerAssertEqual('abc\\,def\r\n', [['abc,def']]) | |
| class TestDialectUnix(TestCsvBase): | |
| dialect = 'unix' | |
| def test_simple_writer(self): | |
| self.writerAssertEqual([[1, 'abc def', 'abc']], '"1","abc def","abc"\n') | |
| def test_simple_reader(self): | |
| self.readerAssertEqual('"1","abc def","abc"\n', [['1', 'abc def', 'abc']]) | |
| class QuotedEscapedExcel(csv.excel): | |
| quoting = csv.QUOTE_NONNUMERIC | |
| escapechar = '\\' | |
| class TestQuotedEscapedExcel(TestCsvBase): | |
| dialect = QuotedEscapedExcel() | |
| def test_write_escape_fieldsep(self): | |
| self.writerAssertEqual([['abc,def']], '"abc,def"\r\n') | |
| def test_read_escape_fieldsep(self): | |
| self.readerAssertEqual('"abc\\,def"\r\n', [['abc,def']]) | |
| class TestDictFields(unittest.TestCase): | |
| ### "long" means the row is longer than the number of fieldnames | |
| ### "short" means there are fewer elements in the row than fieldnames | |
| def test_writeheader_return_value(self): | |
| with TemporaryFile("w+", encoding="utf-8", newline='') as fileobj: | |
| writer = csv.DictWriter(fileobj, fieldnames = ["f1", "f2", "f3"]) | |
| writeheader_return_value = writer.writeheader() | |
| self.assertEqual(writeheader_return_value, 10) | |
| def test_write_simple_dict(self): | |
| with TemporaryFile("w+", encoding="utf-8", newline='') as fileobj: | |
| writer = csv.DictWriter(fileobj, fieldnames = ["f1", "f2", "f3"]) | |
| writer.writeheader() | |
| fileobj.seek(0) | |
| self.assertEqual(fileobj.readline(), "f1,f2,f3\r\n") | |
| writer.writerow({"f1": 10, "f3": "abc"}) | |
| fileobj.seek(0) | |
| fileobj.readline() # header | |
| self.assertEqual(fileobj.read(), "10,,abc\r\n") | |
| def test_write_multiple_dict_rows(self): | |
| fileobj = StringIO() | |
| writer = csv.DictWriter(fileobj, fieldnames=["f1", "f2", "f3"]) | |
| writer.writeheader() | |
| self.assertEqual(fileobj.getvalue(), "f1,f2,f3\r\n") | |
| writer.writerows([{"f1": 1, "f2": "abc", "f3": "f"}, | |
| {"f1": 2, "f2": 5, "f3": "xyz"}]) | |
| self.assertEqual(fileobj.getvalue(), | |
| "f1,f2,f3\r\n1,abc,f\r\n2,5,xyz\r\n") | |
| def test_write_no_fields(self): | |
| fileobj = StringIO() | |
| self.assertRaises(TypeError, csv.DictWriter, fileobj) | |
| def test_write_fields_not_in_fieldnames(self): | |
| with TemporaryFile("w+", encoding="utf-8", newline='') as fileobj: | |
| writer = csv.DictWriter(fileobj, fieldnames = ["f1", "f2", "f3"]) | |
| # Of special note is the non-string key (issue 19449) | |
| with self.assertRaises(ValueError) as cx: | |
| writer.writerow({"f4": 10, "f2": "spam", 1: "abc"}) | |
| exception = str(cx.exception) | |
| self.assertIn("fieldnames", exception) | |
| self.assertIn("'f4'", exception) | |
| 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+", encoding="utf-8") as fileobj: | |
| fileobj.write("1,2,abc\r\n") | |
| fileobj.seek(0) | |
| reader = csv.DictReader(fileobj, | |
| fieldnames=["f1", "f2", "f3"]) | |
| self.assertEqual(next(reader), {"f1": '1', "f2": '2', "f3": 'abc'}) | |
| def test_read_dict_no_fieldnames(self): | |
| with TemporaryFile("w+", encoding="utf-8") as fileobj: | |
| fileobj.write("f1,f2,f3\r\n1,2,abc\r\n") | |
| fileobj.seek(0) | |
| reader = csv.DictReader(fileobj) | |
| self.assertEqual(next(reader), {"f1": '1', "f2": '2', "f3": 'abc'}) | |
| self.assertEqual(reader.fieldnames, ["f1", "f2", "f3"]) | |
| # Two test cases to make sure existing ways of implicitly setting | |
| # fieldnames continue to work. Both arise from discussion in issue3436. | |
| def test_read_dict_fieldnames_from_file(self): | |
| with TemporaryFile("w+", encoding="utf-8") as fileobj: | |
| fileobj.write("f1,f2,f3\r\n1,2,abc\r\n") | |
| fileobj.seek(0) | |
| reader = csv.DictReader(fileobj, | |
| fieldnames=next(csv.reader(fileobj))) | |
| self.assertEqual(reader.fieldnames, ["f1", "f2", "f3"]) | |
| self.assertEqual(next(reader), {"f1": '1', "f2": '2', "f3": 'abc'}) | |
| def test_read_dict_fieldnames_chain(self): | |
| import itertools | |
| with TemporaryFile("w+", encoding="utf-8") as fileobj: | |
| fileobj.write("f1,f2,f3\r\n1,2,abc\r\n") | |
| fileobj.seek(0) | |
| reader = csv.DictReader(fileobj) | |
| first = next(reader) | |
| for row in itertools.chain([first], reader): | |
| self.assertEqual(reader.fieldnames, ["f1", "f2", "f3"]) | |
| self.assertEqual(row, {"f1": '1', "f2": '2', "f3": 'abc'}) | |
| def test_read_long(self): | |
| with TemporaryFile("w+", encoding="utf-8") as fileobj: | |
| fileobj.write("1,2,abc,4,5,6\r\n") | |
| fileobj.seek(0) | |
| reader = csv.DictReader(fileobj, | |
| fieldnames=["f1", "f2"]) | |
| self.assertEqual(next(reader), {"f1": '1', "f2": '2', | |
| None: ["abc", "4", "5", "6"]}) | |
| def test_read_long_with_rest(self): | |
| with TemporaryFile("w+", encoding="utf-8") as fileobj: | |
| fileobj.write("1,2,abc,4,5,6\r\n") | |
| fileobj.seek(0) | |
| reader = csv.DictReader(fileobj, | |
| fieldnames=["f1", "f2"], restkey="_rest") | |
| self.assertEqual(next(reader), {"f1": '1', "f2": '2', | |
| "_rest": ["abc", "4", "5", "6"]}) | |
| def test_read_long_with_rest_no_fieldnames(self): | |
| with TemporaryFile("w+", encoding="utf-8") as fileobj: | |
| fileobj.write("f1,f2\r\n1,2,abc,4,5,6\r\n") | |
| fileobj.seek(0) | |
| reader = csv.DictReader(fileobj, restkey="_rest") | |
| self.assertEqual(reader.fieldnames, ["f1", "f2"]) | |
| self.assertEqual(next(reader), {"f1": '1', "f2": '2', | |
| "_rest": ["abc", "4", "5", "6"]}) | |
| def test_read_short(self): | |
| with TemporaryFile("w+", encoding="utf-8") as fileobj: | |
| fileobj.write("1,2,abc,4,5,6\r\n1,2,abc\r\n") | |
| fileobj.seek(0) | |
| reader = csv.DictReader(fileobj, | |
| fieldnames="1 2 3 4 5 6".split(), | |
| restval="DEFAULT") | |
| self.assertEqual(next(reader), {"1": '1', "2": '2', "3": 'abc', | |
| "4": '4', "5": '5', "6": '6'}) | |
| self.assertEqual(next(reader), {"1": '1', "2": '2', "3": 'abc', | |
| "4": 'DEFAULT', "5": 'DEFAULT', | |
| "6": 'DEFAULT'}) | |
| def test_read_multi(self): | |
| sample = [ | |
| '2147483648,43.0e12,17,abc,def\r\n', | |
| '147483648,43.0e2,17,abc,def\r\n', | |
| '47483648,43.0,170,abc,def\r\n' | |
| ] | |
| reader = csv.DictReader(sample, | |
| fieldnames="i1 float i2 s1 s2".split()) | |
| self.assertEqual(next(reader), {"i1": '2147483648', | |
| "float": '43.0e12', | |
| "i2": '17', | |
| "s1": 'abc', | |
| "s2": 'def'}) | |
| def test_read_with_blanks(self): | |
| reader = csv.DictReader(["1,2,abc,4,5,6\r\n","\r\n", | |
| "1,2,abc,4,5,6\r\n"], | |
| fieldnames="1 2 3 4 5 6".split()) | |
| self.assertEqual(next(reader), {"1": '1', "2": '2', "3": 'abc', | |
| "4": '4', "5": '5', "6": '6'}) | |
| self.assertEqual(next(reader), {"1": '1', "2": '2', "3": 'abc', | |
| "4": '4', "5": '5', "6": '6'}) | |
| def test_read_semi_sep(self): | |
| reader = csv.DictReader(["1;2;abc;4;5;6\r\n"], | |
| fieldnames="1 2 3 4 5 6".split(), | |
| delimiter=';') | |
| self.assertEqual(next(reader), {"1": '1', "2": '2', "3": 'abc', | |
| "4": '4', "5": '5', "6": '6'}) | |
| class TestArrayWrites(unittest.TestCase): | |
| def test_int_write(self): | |
| import array | |
| contents = [(20-i) for i in range(20)] | |
| a = array.array('i', contents) | |
| with TemporaryFile("w+", encoding="utf-8", newline='') as fileobj: | |
| writer = csv.writer(fileobj, dialect="excel") | |
| writer.writerow(a) | |
| expected = ",".join([str(i) for i in a])+"\r\n" | |
| fileobj.seek(0) | |
| self.assertEqual(fileobj.read(), expected) | |
| def test_double_write(self): | |
| import array | |
| contents = [(20-i)*0.1 for i in range(20)] | |
| a = array.array('d', contents) | |
| with TemporaryFile("w+", encoding="utf-8", newline='') as fileobj: | |
| writer = csv.writer(fileobj, dialect="excel") | |
| writer.writerow(a) | |
| expected = ",".join([str(i) for i in a])+"\r\n" | |
| fileobj.seek(0) | |
| self.assertEqual(fileobj.read(), expected) | |
| def test_float_write(self): | |
| import array | |
| contents = [(20-i)*0.1 for i in range(20)] | |
| a = array.array('f', contents) | |
| with TemporaryFile("w+", encoding="utf-8", newline='') as fileobj: | |
| writer = csv.writer(fileobj, dialect="excel") | |
| writer.writerow(a) | |
| expected = ",".join([str(i) for i in a])+"\r\n" | |
| fileobj.seek(0) | |
| self.assertEqual(fileobj.read(), expected) | |
| def test_char_write(self): | |
| import array, string | |
| a = array.array('u', string.ascii_letters) | |
| with TemporaryFile("w+", encoding="utf-8", newline='') as fileobj: | |
| writer = csv.writer(fileobj, dialect="excel") | |
| writer.writerow(a) | |
| expected = ",".join(a)+"\r\n" | |
| fileobj.seek(0) | |
| self.assertEqual(fileobj.read(), expected) | |
| class TestDialectValidity(unittest.TestCase): | |
| def test_quoting(self): | |
| class mydialect(csv.Dialect): | |
| delimiter = ";" | |
| escapechar = '\\' | |
| doublequote = False | |
| skipinitialspace = True | |
| lineterminator = '\r\n' | |
| quoting = csv.QUOTE_NONE | |
| d = mydialect() | |
| self.assertEqual(d.quoting, csv.QUOTE_NONE) | |
| mydialect.quoting = None | |
| self.assertRaises(csv.Error, mydialect) | |
| mydialect.doublequote = True | |
| mydialect.quoting = csv.QUOTE_ALL | |
| mydialect.quotechar = '"' | |
| d = mydialect() | |
| self.assertEqual(d.quoting, csv.QUOTE_ALL) | |
| self.assertEqual(d.quotechar, '"') | |
| self.assertTrue(d.doublequote) | |
| mydialect.quotechar = "''" | |
| with self.assertRaises(csv.Error) as cm: | |
| mydialect() | |
| self.assertEqual(str(cm.exception), | |
| '"quotechar" must be a 1-character string') | |
| mydialect.quotechar = 4 | |
| with self.assertRaises(csv.Error) as cm: | |
| mydialect() | |
| self.assertEqual(str(cm.exception), | |
| '"quotechar" must be string or None, not int') | |
| def test_delimiter(self): | |
| class mydialect(csv.Dialect): | |
| delimiter = ";" | |
| escapechar = '\\' | |
| doublequote = False | |
| skipinitialspace = True | |
| lineterminator = '\r\n' | |
| quoting = csv.QUOTE_NONE | |
| d = mydialect() | |
| self.assertEqual(d.delimiter, ";") | |
| mydialect.delimiter = ":::" | |
| with self.assertRaises(csv.Error) as cm: | |
| mydialect() | |
| self.assertEqual(str(cm.exception), | |
| '"delimiter" must be a 1-character string') | |
| mydialect.delimiter = "" | |
| with self.assertRaises(csv.Error) as cm: | |
| mydialect() | |
| self.assertEqual(str(cm.exception), | |
| '"delimiter" must be a 1-character string') | |
| mydialect.delimiter = b"," | |
| with self.assertRaises(csv.Error) as cm: | |
| mydialect() | |
| self.assertEqual(str(cm.exception), | |
| '"delimiter" must be string, not bytes') | |
| mydialect.delimiter = 4 | |
| with self.assertRaises(csv.Error) as cm: | |
| mydialect() | |
| self.assertEqual(str(cm.exception), | |
| '"delimiter" must be string, not int') | |
| mydialect.delimiter = None | |
| with self.assertRaises(csv.Error) as cm: | |
| mydialect() | |
| self.assertEqual(str(cm.exception), | |
| '"delimiter" must be string, not NoneType') | |
| def test_escapechar(self): | |
| class mydialect(csv.Dialect): | |
| delimiter = ";" | |
| escapechar = '\\' | |
| doublequote = False | |
| skipinitialspace = True | |
| lineterminator = '\r\n' | |
| quoting = csv.QUOTE_NONE | |
| d = mydialect() | |
| self.assertEqual(d.escapechar, "\\") | |
| mydialect.escapechar = "**" | |
| with self.assertRaisesRegex(csv.Error, '"escapechar" must be a 1-character string'): | |
| mydialect() | |
| mydialect.escapechar = b"*" | |
| with self.assertRaisesRegex(csv.Error, '"escapechar" must be string or None, not bytes'): | |
| mydialect() | |
| mydialect.escapechar = 4 | |
| with self.assertRaisesRegex(csv.Error, '"escapechar" must be string or None, not int'): | |
| mydialect() | |
| def test_lineterminator(self): | |
| class mydialect(csv.Dialect): | |
| delimiter = ";" | |
| escapechar = '\\' | |
| doublequote = False | |
| skipinitialspace = True | |
| lineterminator = '\r\n' | |
| quoting = csv.QUOTE_NONE | |
| d = mydialect() | |
| self.assertEqual(d.lineterminator, '\r\n') | |
| mydialect.lineterminator = ":::" | |
| d = mydialect() | |
| self.assertEqual(d.lineterminator, ":::") | |
| mydialect.lineterminator = 4 | |
| with self.assertRaises(csv.Error) as cm: | |
| mydialect() | |
| self.assertEqual(str(cm.exception), | |
| '"lineterminator" must be a string') | |
| def test_invalid_chars(self): | |
| def create_invalid(field_name, value): | |
| class mydialect(csv.Dialect): | |
| pass | |
| setattr(mydialect, field_name, value) | |
| d = mydialect() | |
| for field_name in ("delimiter", "escapechar", "quotechar"): | |
| with self.subTest(field_name=field_name): | |
| self.assertRaises(csv.Error, create_invalid, field_name, "") | |
| self.assertRaises(csv.Error, create_invalid, field_name, "abc") | |
| self.assertRaises(csv.Error, create_invalid, field_name, b'x') | |
| self.assertRaises(csv.Error, create_invalid, field_name, 5) | |
| class TestSniffer(unittest.TestCase): | |
| sample1 = """\ | |
| Harry's, Arlington Heights, IL, 2/1/03, Kimi Hayes | |
| Shark City, Glendale Heights, IL, 12/28/02, Prezence | |
| Tommy's Place, Blue Island, IL, 12/28/02, Blue Sunday/White Crow | |
| Stonecutters Seafood and Chop House, Lemont, IL, 12/19/02, Week Back | |
| """ | |
| sample2 = """\ | |
| 'Harry''s':'Arlington Heights':'IL':'2/1/03':'Kimi Hayes' | |
| 'Shark City':'Glendale Heights':'IL':'12/28/02':'Prezence' | |
| 'Tommy''s Place':'Blue Island':'IL':'12/28/02':'Blue Sunday/White Crow' | |
| 'Stonecutters ''Seafood'' and Chop House':'Lemont':'IL':'12/19/02':'Week Back' | |
| """ | |
| header1 = '''\ | |
| "venue","city","state","date","performers" | |
| ''' | |
| sample3 = '''\ | |
| 05/05/03?05/05/03?05/05/03?05/05/03?05/05/03?05/05/03 | |
| 05/05/03?05/05/03?05/05/03?05/05/03?05/05/03?05/05/03 | |
| 05/05/03?05/05/03?05/05/03?05/05/03?05/05/03?05/05/03 | |
| ''' | |
| sample4 = '''\ | |
| 2147483648;43.0e12;17;abc;def | |
| 147483648;43.0e2;17;abc;def | |
| 47483648;43.0;170;abc;def | |
| ''' | |
| sample5 = "aaa\tbbb\r\nAAA\t\r\nBBB\t\r\n" | |
| sample6 = "a|b|c\r\nd|e|f\r\n" | |
| sample7 = "'a'|'b'|'c'\r\n'd'|e|f\r\n" | |
| # Issue 18155: Use a delimiter that is a special char to regex: | |
| header2 = '''\ | |
| "venue"+"city"+"state"+"date"+"performers" | |
| ''' | |
| sample8 = """\ | |
| Harry's+ Arlington Heights+ IL+ 2/1/03+ Kimi Hayes | |
| Shark City+ Glendale Heights+ IL+ 12/28/02+ Prezence | |
| Tommy's Place+ Blue Island+ IL+ 12/28/02+ Blue Sunday/White Crow | |
| Stonecutters Seafood and Chop House+ Lemont+ IL+ 12/19/02+ Week Back | |
| """ | |
| sample9 = """\ | |
| 'Harry''s'+ Arlington Heights'+ 'IL'+ '2/1/03'+ 'Kimi Hayes' | |
| 'Shark City'+ Glendale Heights'+' IL'+ '12/28/02'+ 'Prezence' | |
| 'Tommy''s Place'+ Blue Island'+ 'IL'+ '12/28/02'+ 'Blue Sunday/White Crow' | |
| 'Stonecutters ''Seafood'' and Chop House'+ 'Lemont'+ 'IL'+ '12/19/02'+ 'Week Back' | |
| """ | |
| sample10 = dedent(""" | |
| abc,def | |
| ghijkl,mno | |
| ghi,jkl | |
| """) | |
| sample11 = dedent(""" | |
| abc,def | |
| ghijkl,mnop | |
| ghi,jkl | |
| """) | |
| sample12 = dedent(""""time","forces" | |
| 1,1.5 | |
| 0.5,5+0j | |
| 0,0 | |
| 1+1j,6 | |
| """) | |
| sample13 = dedent(""""time","forces" | |
| 0,0 | |
| 1,2 | |
| a,b | |
| """) | |
| def test_issue43625(self): | |
| sniffer = csv.Sniffer() | |
| self.assertTrue(sniffer.has_header(self.sample12)) | |
| self.assertFalse(sniffer.has_header(self.sample13)) | |
| def test_has_header_strings(self): | |
| "More to document existing (unexpected?) behavior than anything else." | |
| sniffer = csv.Sniffer() | |
| self.assertFalse(sniffer.has_header(self.sample10)) | |
| self.assertFalse(sniffer.has_header(self.sample11)) | |
| def test_has_header(self): | |
| sniffer = csv.Sniffer() | |
| self.assertIs(sniffer.has_header(self.sample1), False) | |
| self.assertIs(sniffer.has_header(self.header1 + self.sample1), True) | |
| def test_has_header_regex_special_delimiter(self): | |
| sniffer = csv.Sniffer() | |
| self.assertIs(sniffer.has_header(self.sample8), False) | |
| self.assertIs(sniffer.has_header(self.header2 + self.sample8), True) | |
| def test_guess_quote_and_delimiter(self): | |
| sniffer = csv.Sniffer() | |
| for header in (";'123;4';", "'123;4';", ";'123;4'", "'123;4'"): | |
| with self.subTest(header): | |
| dialect = sniffer.sniff(header, ",;") | |
| self.assertEqual(dialect.delimiter, ';') | |
| self.assertEqual(dialect.quotechar, "'") | |
| self.assertIs(dialect.doublequote, False) | |
| self.assertIs(dialect.skipinitialspace, False) | |
| def test_sniff(self): | |
| sniffer = csv.Sniffer() | |
| dialect = sniffer.sniff(self.sample1) | |
| self.assertEqual(dialect.delimiter, ",") | |
| self.assertEqual(dialect.quotechar, '"') | |
| self.assertIs(dialect.skipinitialspace, True) | |
| dialect = sniffer.sniff(self.sample2) | |
| self.assertEqual(dialect.delimiter, ":") | |
| self.assertEqual(dialect.quotechar, "'") | |
| self.assertIs(dialect.skipinitialspace, False) | |
| def test_delimiters(self): | |
| sniffer = csv.Sniffer() | |
| dialect = sniffer.sniff(self.sample3) | |
| # given that all three lines in sample3 are equal, | |
| # I think that any character could have been 'guessed' as the | |
| # delimiter, depending on dictionary order | |
| self.assertIn(dialect.delimiter, self.sample3) | |
| dialect = sniffer.sniff(self.sample3, delimiters="?,") | |
| self.assertEqual(dialect.delimiter, "?") | |
| dialect = sniffer.sniff(self.sample3, delimiters="/,") | |
| self.assertEqual(dialect.delimiter, "/") | |
| dialect = sniffer.sniff(self.sample4) | |
| self.assertEqual(dialect.delimiter, ";") | |
| dialect = sniffer.sniff(self.sample5) | |
| self.assertEqual(dialect.delimiter, "\t") | |
| dialect = sniffer.sniff(self.sample6) | |
| self.assertEqual(dialect.delimiter, "|") | |
| dialect = sniffer.sniff(self.sample7) | |
| self.assertEqual(dialect.delimiter, "|") | |
| self.assertEqual(dialect.quotechar, "'") | |
| dialect = sniffer.sniff(self.sample8) | |
| self.assertEqual(dialect.delimiter, '+') | |
| dialect = sniffer.sniff(self.sample9) | |
| self.assertEqual(dialect.delimiter, '+') | |
| self.assertEqual(dialect.quotechar, "'") | |
| def test_doublequote(self): | |
| sniffer = csv.Sniffer() | |
| dialect = sniffer.sniff(self.header1) | |
| self.assertFalse(dialect.doublequote) | |
| dialect = sniffer.sniff(self.header2) | |
| self.assertFalse(dialect.doublequote) | |
| dialect = sniffer.sniff(self.sample2) | |
| self.assertTrue(dialect.doublequote) | |
| dialect = sniffer.sniff(self.sample8) | |
| self.assertFalse(dialect.doublequote) | |
| dialect = sniffer.sniff(self.sample9) | |
| self.assertTrue(dialect.doublequote) | |
| class NUL: | |
| def write(s, *args): | |
| pass | |
| writelines = write | |
| @unittest.skipUnless(hasattr(sys, "gettotalrefcount"), | |
| 'requires sys.gettotalrefcount()') | |
| class TestLeaks(unittest.TestCase): | |
| def test_create_read(self): | |
| delta = 0 | |
| lastrc = sys.gettotalrefcount() | |
| for i in range(20): | |
| gc.collect() | |
| self.assertEqual(gc.garbage, []) | |
| rc = sys.gettotalrefcount() | |
| csv.reader(["a,b,c\r\n"]) | |
| csv.reader(["a,b,c\r\n"]) | |
| csv.reader(["a,b,c\r\n"]) | |
| delta = rc-lastrc | |
| lastrc = rc | |
| # if csv.reader() leaks, last delta should be 3 or more | |
| self.assertLess(delta, 3) | |
| def test_create_write(self): | |
| delta = 0 | |
| lastrc = sys.gettotalrefcount() | |
| s = NUL() | |
| for i in range(20): | |
| gc.collect() | |
| self.assertEqual(gc.garbage, []) | |
| rc = sys.gettotalrefcount() | |
| csv.writer(s) | |
| csv.writer(s) | |
| csv.writer(s) | |
| delta = rc-lastrc | |
| lastrc = rc | |
| # if csv.writer() leaks, last delta should be 3 or more | |
| self.assertLess(delta, 3) | |
| def test_read(self): | |
| delta = 0 | |
| rows = ["a,b,c\r\n"]*5 | |
| lastrc = sys.gettotalrefcount() | |
| for i in range(20): | |
| gc.collect() | |
| self.assertEqual(gc.garbage, []) | |
| rc = sys.gettotalrefcount() | |
| rdr = csv.reader(rows) | |
| for row in rdr: | |
| pass | |
| delta = rc-lastrc | |
| lastrc = rc | |
| # if reader leaks during read, delta should be 5 or more | |
| self.assertLess(delta, 5) | |
| def test_write(self): | |
| delta = 0 | |
| rows = [[1,2,3]]*5 | |
| s = NUL() | |
| lastrc = sys.gettotalrefcount() | |
| for i in range(20): | |
| gc.collect() | |
| self.assertEqual(gc.garbage, []) | |
| rc = sys.gettotalrefcount() | |
| writer = csv.writer(s) | |
| for row in rows: | |
| writer.writerow(row) | |
| delta = rc-lastrc | |
| lastrc = rc | |
| # if writer leaks during write, last delta should be 5 or more | |
| self.assertLess(delta, 5) | |
| class TestUnicode(unittest.TestCase): | |
| names = ["Martin von Löwis", | |
| "Marc André Lemburg", | |
| "Guido van Rossum", | |
| "François Pinard"] | |
| def test_unicode_read(self): | |
| with TemporaryFile("w+", newline='', encoding="utf-8") as fileobj: | |
| fileobj.write(",".join(self.names) + "\r\n") | |
| fileobj.seek(0) | |
| reader = csv.reader(fileobj) | |
| self.assertEqual(list(reader), [self.names]) | |
| def test_unicode_write(self): | |
| with TemporaryFile("w+", newline='', encoding="utf-8") as fileobj: | |
| writer = csv.writer(fileobj) | |
| writer.writerow(self.names) | |
| expected = ",".join(self.names)+"\r\n" | |
| 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) | |
| def test_subclassable(self): | |
| # issue 44089 | |
| class Foo(csv.Error): ... | |
| if __name__ == '__main__': | |
| unittest.main() |