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Frank Wierzbicki committed 6c415b3 Draft

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Files changed (2)

Lib/test/test_aifc.py

-from test.test_support import findfile, run_unittest, TESTFN
+from test.test_support import findfile, run_unittest, TESTFN, is_jython
 import unittest
 import os
 import io
         self.assertEqual(f.getparams(), fout.getparams())
         self.assertEqual(f.readframes(5), fout.readframes(5))
 
+    @unittest.skipIf(is_jython, "FIXME: not working in Jython")
     def test_compress(self):
         f = self.f = aifc.open(self.sndfilepath)
         fout = self.fout = aifc.open(TESTFN, 'wb')

Lib/test/test_csv.py

+# -*- coding: iso-8859-1 -*-
+# Copyright (C) 2001,2002 Python Software Foundation
+# csv package unit tests
+
+import sys
+import os
+import unittest
+from StringIO import StringIO
+import tempfile
+import csv
+import gc
+import io
+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 test_write_arg_valid(self):
+        self.assertRaises(csv.Error, self._write_test, None, '')
+        self._write_test((), '')
+        self._write_test([None], '""')
+        self.assertRaises(csv.Error, self._write_test,
+                          [None], 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.assertRaises(IOError, self._write_test, BadList(), '')
+        class BadItem:
+            def __str__(self):
+                raise IOError
+        self.assertRaises(IOError, self._write_test, [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.assertRaises(csv.Error,
+                          self._write_test,
+                          ['a',1,'p,q'], '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.assertRaises(csv.Error,
+                          self._write_test,
+                          ['a',1,'p,"q"'], '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_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)
+
+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_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()
+
+        mydialect.quoting = None
+        self.assertRaises(csv.Error, mydialect)
+
+        mydialect.doublequote = True
+        mydialect.quoting = csv.QUOTE_ALL
+        mydialect.quotechar = '"'
+        d = mydialect()
+
+        mydialect.quotechar = "''"
+        self.assertRaises(csv.Error, mydialect)
+
+        mydialect.quotechar = 4
+        self.assertRaises(csv.Error, mydialect)
+
+    def test_delimiter(self):
+        class mydialect(csv.Dialect):
+            delimiter = ";"
+            escapechar = '\\'
+            doublequote = False
+            skipinitialspace = True
+            lineterminator = '\r\n'
+            quoting = csv.QUOTE_NONE
+        d = mydialect()
+
+        mydialect.delimiter = ":::"
+        self.assertRaises(csv.Error, mydialect)
+
+        mydialect.delimiter = 4
+        self.assertRaises(csv.Error, mydialect)
+
+    def test_lineterminator(self):
+        class mydialect(csv.Dialect):
+            delimiter = ";"
+            escapechar = '\\'
+            doublequote = False
+            skipinitialspace = True
+            lineterminator = '\r\n'
+            quoting = csv.QUOTE_NONE
+        d = mydialect()
+
+        mydialect.lineterminator = ":::"
+        d = mydialect()
+
+        mydialect.lineterminator = 4
+        self.assertRaises(csv.Error, mydialect)
+
+
+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'
+"""
+    header = '''\
+"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"
+
+    def test_has_header(self):
+        sniffer = csv.Sniffer()
+        self.assertEqual(sniffer.has_header(self.sample1), False)
+        self.assertEqual(sniffer.has_header(self.header+self.sample1), True)
+
+    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, "'")
+
+    def test_doublequote(self):
+        sniffer = csv.Sniffer()
+        dialect = sniffer.sniff(self.header)
+        self.assertFalse(dialect.doublequote)
+        dialect = sniffer.sniff(self.sample2)
+        self.assertTrue(dialect.doublequote)
+
+if not hasattr(sys, "gettotalrefcount"):
+    if test_support.verbose: print "*** skipping leakage tests ***"
+else:
+    class NUL:
+        def write(s, *args):
+            pass
+        writelines = write
+
+    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()