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✏️ test_csv.py
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# -*- coding: iso-8859-1 -*- # Copyright (C) 2001,2002 Python Software Foundation # csv package unit tests import copy import sys import os import unittest from StringIO import StringIO import tempfile import csv import gc import io import pickle from test import test_support 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, []) def test_writer_arg_valid(self): self._test_arg_valid(csv.writer, StringIO()) def _test_default_attrs(self, ctor, *args): obj = ctor(*args) # Check defaults self.assertEqual(obj.dialect.delimiter, ',') self.assertEqual(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.assertEqual(obj.dialect.skipinitialspace, False) self.assertEqual(obj.dialect.strict, False) # Try deleting or changing attributes (they are read-only) self.assertRaises(TypeError, delattr, obj.dialect, 'delimiter') self.assertRaises(TypeError, 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.assertEqual(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.assertEqual(obj.dialect.skipinitialspace, True) self.assertEqual(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='$' quotechar='#' quoting=csv.QUOTE_ALL skipinitialspace=True strict=False args = args + (dialect,) obj = ctor(*args) self.assertEqual(obj.dialect.delimiter, '-') self.assertEqual(obj.dialect.doublequote, False) self.assertEqual(obj.dialect.escapechar, '^') self.assertEqual(obj.dialect.lineterminator, "$") self.assertEqual(obj.dialect.quotechar, '#') self.assertEqual(obj.dialect.quoting, csv.QUOTE_ALL) self.assertEqual(obj.dialect.skipinitialspace, True) self.assertEqual(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): fd, name = tempfile.mkstemp() fileobj = os.fdopen(fd, "w+b") try: writer = csv.writer(fileobj, **kwargs) writer.writerow(fields) fileobj.seek(0) self.assertEqual(fileobj.read(), expect + writer.dialect.lineterminator) finally: fileobj.close() os.unlink(name) def _write_error_test(self, exc, fields, **kwargs): fd, name = tempfile.mkstemp() fileobj = os.fdopen(fd, "w+b") try: writer = csv.writer(fileobj, **kwargs) with self.assertRaises(exc): writer.writerow(fields) fileobj.seek(0) self.assertEqual(fileobj.read(), '') finally: fileobj.close() os.unlink(name) 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 class BadList: def __len__(self): return 10; def __getitem__(self, i): if i > 2: raise IOError self._write_error_test(IOError, BadList()) class BadItem: def __str__(self): raise IOError self._write_error_test(IOError, [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) def test_writerows(self): class BrokenFile: def write(self, buf): raise IOError writer = csv.writer(BrokenFile()) self.assertRaises(IOError, writer.writerows, [['a']]) fd, name = tempfile.mkstemp() fileobj = os.fdopen(fd, "w+b") try: 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") finally: fileobj.close() os.unlink(name) def test_write_float(self): # Issue 13573: loss of precision because csv.writer # uses str() for floats instead of repr() orig_row = [1.234567890123, 1.0/7.0, 'abc'] f = StringIO() c = csv.writer(f, quoting=csv.QUOTE_NONNUMERIC) c.writerow(orig_row) f.seek(0) c = csv.reader(f, quoting=csv.QUOTE_NONNUMERIC) new_row = next(c) self.assertEqual(orig_row, new_row) 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) 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): for r in (csv.reader(['line,1', 'line,2', 'line,3']), csv.DictReader(['line,1', 'line,2', 'line,3'], fieldnames=['a', 'b', 'c'])): self.assertEqual(r.line_num, 0) r.next() self.assertEqual(r.line_num, 1) r.next() self.assertEqual(r.line_num, 2) r.next() self.assertEqual(r.line_num, 3) self.assertRaises(StopIteration, r.next) self.assertEqual(r.line_num, 3) def test_roundtrip_quoteed_newlines(self): fd, name = tempfile.mkstemp() fileobj = os.fdopen(fd, "w+b") try: writer = csv.writer(fileobj) self.assertRaises(TypeError, writer.writerows, None) 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]) finally: fileobj.close() os.unlink(name) 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 = "\\" fd, name = tempfile.mkstemp() fileobj = os.fdopen(fd, "w+b") try: fileobj.write("abc def\nc1ccccc1 benzene\n") fileobj.seek(0) rdr = csv.reader(fileobj, dialect=space()) self.assertEqual(rdr.next(), ["abc", "def"]) self.assertEqual(rdr.next(), ["c1ccccc1", "benzene"]) finally: fileobj.close() os.unlink(name) def test_dialect_apply(self): class testA(csv.excel): delimiter = "\t" class testB(csv.excel): delimiter = ":" class testC(csv.excel): delimiter = "|" csv.register_dialect('testC', testC) try: fd, name = tempfile.mkstemp() fileobj = os.fdopen(fd, "w+b") try: writer = csv.writer(fileobj) writer.writerow([1,2,3]) fileobj.seek(0) self.assertEqual(fileobj.read(), "1,2,3\r\n") finally: fileobj.close() os.unlink(name) fd, name = tempfile.mkstemp() fileobj = os.fdopen(fd, "w+b") try: writer = csv.writer(fileobj, testA) writer.writerow([1,2,3]) fileobj.seek(0) self.assertEqual(fileobj.read(), "1\t2\t3\r\n") finally: fileobj.close() os.unlink(name) fd, name = tempfile.mkstemp() fileobj = os.fdopen(fd, "w+b") try: writer = csv.writer(fileobj, dialect=testB()) writer.writerow([1,2,3]) fileobj.seek(0) self.assertEqual(fileobj.read(), "1:2:3\r\n") finally: fileobj.close() os.unlink(name) fd, name = tempfile.mkstemp() fileobj = os.fdopen(fd, "w+b") try: writer = csv.writer(fileobj, dialect='testC') writer.writerow([1,2,3]) fileobj.seek(0) self.assertEqual(fileobj.read(), "1|2|3\r\n") finally: fileobj.close() os.unlink(name) fd, name = tempfile.mkstemp() fileobj = os.fdopen(fd, "w+b") try: writer = csv.writer(fileobj, dialect=testA, delimiter=';') writer.writerow([1,2,3]) fileobj.seek(0) self.assertEqual(fileobj.read(), "1;2;3\r\n") finally: fileobj.close() os.unlink(name) 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) # 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_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): fd, name = tempfile.mkstemp() fileobj = os.fdopen(fd, "w+b") try: fileobj.write(input) fileobj.seek(0) reader = csv.reader(fileobj, dialect = self.dialect) fields = list(reader) self.assertEqual(fields, expected_result) finally: fileobj.close() os.unlink(name) def writerAssertEqual(self, input, expected_result): fd, name = tempfile.mkstemp() fileobj = os.fdopen(fd, "w+b") try: writer = csv.writer(fileobj, dialect = self.dialect) writer.writerows(input) fileobj.seek(0) self.assertEqual(fileobj.read(), expected_result) finally: fileobj.close() os.unlink(name) 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 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_write_simple_dict(self): fd, name = tempfile.mkstemp() fileobj = io.open(fd, 'w+b') try: 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") finally: fileobj.close() os.unlink(name) def test_write_no_fields(self): fileobj = StringIO() self.assertRaises(TypeError, csv.DictWriter, fileobj) def test_write_fields_not_in_fieldnames(self): fd, name = tempfile.mkstemp() fileobj = os.fdopen(fd, "w+b") try: 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) finally: fileobj.close() os.unlink(name) def test_read_dict_fields(self): fd, name = tempfile.mkstemp() fileobj = os.fdopen(fd, "w+b") try: fileobj.write("1,2,abc\r\n") fileobj.seek(0) reader = csv.DictReader(fileobj, fieldnames=["f1", "f2", "f3"]) self.assertEqual(reader.next(), {"f1": '1', "f2": '2', "f3": 'abc'}) finally: fileobj.close() os.unlink(name) def test_read_dict_no_fieldnames(self): fd, name = tempfile.mkstemp() fileobj = os.fdopen(fd, "w+b") try: fileobj.write("f1,f2,f3\r\n1,2,abc\r\n") fileobj.seek(0) reader = csv.DictReader(fileobj) self.assertEqual(reader.fieldnames, ["f1", "f2", "f3"]) self.assertEqual(reader.next(), {"f1": '1', "f2": '2', "f3": 'abc'}) finally: fileobj.close() os.unlink(name) # 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): fd, name = tempfile.mkstemp() f = os.fdopen(fd, "w+b") try: f.write("f1,f2,f3\r\n1,2,abc\r\n") f.seek(0) reader = csv.DictReader(f, fieldnames=csv.reader(f).next()) self.assertEqual(reader.fieldnames, ["f1", "f2", "f3"]) self.assertEqual(reader.next(), {"f1": '1', "f2": '2', "f3": 'abc'}) finally: f.close() os.unlink(name) def test_read_dict_fieldnames_chain(self): import itertools fd, name = tempfile.mkstemp() f = os.fdopen(fd, "w+b") try: f.write("f1,f2,f3\r\n1,2,abc\r\n") f.seek(0) reader = csv.DictReader(f) 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'}) finally: f.close() os.unlink(name) def test_read_long(self): fd, name = tempfile.mkstemp() fileobj = os.fdopen(fd, "w+b") try: fileobj.write("1,2,abc,4,5,6\r\n") fileobj.seek(0) reader = csv.DictReader(fileobj, fieldnames=["f1", "f2"]) self.assertEqual(reader.next(), {"f1": '1', "f2": '2', None: ["abc", "4", "5", "6"]}) finally: fileobj.close() os.unlink(name) def test_read_long_with_rest(self): fd, name = tempfile.mkstemp() fileobj = os.fdopen(fd, "w+b") try: fileobj.write("1,2,abc,4,5,6\r\n") fileobj.seek(0) reader = csv.DictReader(fileobj, fieldnames=["f1", "f2"], restkey="_rest") self.assertEqual(reader.next(), {"f1": '1', "f2": '2', "_rest": ["abc", "4", "5", "6"]}) finally: fileobj.close() os.unlink(name) def test_read_long_with_rest_no_fieldnames(self): fd, name = tempfile.mkstemp() fileobj = os.fdopen(fd, "w+b") try: 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(reader.next(), {"f1": '1', "f2": '2', "_rest": ["abc", "4", "5", "6"]}) finally: fileobj.close() os.unlink(name) def test_read_short(self): fd, name = tempfile.mkstemp() fileobj = os.fdopen(fd, "w+b") try: 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(reader.next(), {"1": '1', "2": '2', "3": 'abc', "4": '4', "5": '5', "6": '6'}) self.assertEqual(reader.next(), {"1": '1', "2": '2', "3": 'abc', "4": 'DEFAULT', "5": 'DEFAULT', "6": 'DEFAULT'}) finally: fileobj.close() os.unlink(name) 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(reader.next(), {"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(reader.next(), {"1": '1', "2": '2', "3": 'abc', "4": '4', "5": '5', "6": '6'}) self.assertEqual(reader.next(), {"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(reader.next(), {"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) fd, name = tempfile.mkstemp() fileobj = os.fdopen(fd, "w+b") try: 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) finally: fileobj.close() os.unlink(name) def test_double_write(self): import array contents = [(20-i)*0.1 for i in range(20)] a = array.array('d', contents) fd, name = tempfile.mkstemp() fileobj = os.fdopen(fd, "w+b") try: writer = csv.writer(fileobj, dialect="excel") writer.writerow(a) expected = ",".join([repr(i) for i in a])+"\r\n" fileobj.seek(0) self.assertEqual(fileobj.read(), expected) finally: fileobj.close() os.unlink(name) def test_float_write(self): import array contents = [(20-i)*0.1 for i in range(20)] a = array.array('f', contents) fd, name = tempfile.mkstemp() fileobj = os.fdopen(fd, "w+b") try: writer = csv.writer(fileobj, dialect="excel") writer.writerow(a) expected = ",".join([repr(i) for i in a])+"\r\n" fileobj.seek(0) self.assertEqual(fileobj.read(), expected) finally: fileobj.close() os.unlink(name) def test_char_write(self): import array, string a = array.array('c', string.letters) fd, name = tempfile.mkstemp() fileobj = os.fdopen(fd, "w+b") try: writer = csv.writer(fileobj, dialect="excel") writer.writerow(a) expected = ",".join(a)+"\r\n" fileobj.seek(0) self.assertEqual(fileobj.read(), expected) finally: fileobj.close() os.unlink(name) 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 an 1-character string') mydialect.quotechar = 4 with self.assertRaises(csv.Error) as cm: mydialect() self.assertEqual(str(cm.exception), '"quotechar" must be string, 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 an 1-character string') mydialect.delimiter = "" with self.assertRaises(csv.Error) as cm: mydialect() self.assertEqual(str(cm.exception), '"delimiter" must be an 1-character string') mydialect.delimiter = u"," with self.assertRaises(csv.Error) as cm: mydialect() self.assertEqual(str(cm.exception), '"delimiter" must be string, not unicode') mydialect.delimiter = 4 with self.assertRaises(csv.Error) as cm: mydialect() self.assertEqual(str(cm.exception), '"delimiter" must be string, not int') 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') 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' """ def test_has_header(self): sniffer = csv.Sniffer() self.assertEqual(sniffer.has_header(self.sample1), False) self.assertEqual(sniffer.has_header(self.header1 + self.sample1), True) def test_has_header_regex_special_delimiter(self): sniffer = csv.Sniffer() self.assertEqual(sniffer.has_header(self.sample8), False) self.assertEqual(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'"): 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.assertEqual(dialect.skipinitialspace, True) dialect = sniffer.sniff(self.sample2) self.assertEqual(dialect.delimiter, ":") self.assertEqual(dialect.quotechar, "'") self.assertEqual(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 xrange(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.assertEqual(delta < 3, True) def test_create_write(self): delta = 0 lastrc = sys.gettotalrefcount() s = NUL() for i in xrange(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.assertEqual(delta < 3, True) def test_read(self): delta = 0 rows = ["a,b,c\r\n"]*5 lastrc = sys.gettotalrefcount() for i in xrange(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.assertEqual(delta < 5, True) def test_write(self): delta = 0 rows = [[1,2,3]]*5 s = NUL() lastrc = sys.gettotalrefcount() for i in xrange(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.assertEqual(delta < 5, True) # commented out for now - csv module doesn't yet support Unicode ## class TestUnicode(unittest.TestCase): ## def test_unicode_read(self): ## import codecs ## f = codecs.EncodedFile(StringIO("Martin von L�wis," ## "Marc Andr� Lemburg," ## "Guido van Rossum," ## "Fran�ois Pinard\r\n"), ## data_encoding='iso-8859-1') ## reader = csv.reader(f) ## self.assertEqual(list(reader), [[u"Martin von L�wis", ## u"Marc Andr� Lemburg", ## u"Guido van Rossum", ## u"Fran�ois Pinardn"]]) def test_main(): mod = sys.modules[__name__] test_support.run_unittest( *[getattr(mod, name) for name in dir(mod) if name.startswith('Test')] ) if __name__ == '__main__': test_main()
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