cpython / Lib / test / test_configparser.py

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import collections
import configparser
import io
import os
import sys
import textwrap
import unittest
import warnings

from test import support

class SortedDict(collections.UserDict):

    def items(self):
        return sorted(self.data.items())

    def keys(self):
        return sorted(self.data.keys())

    def values(self):
        return [i[1] for i in self.items()]

    def iteritems(self):
        return iter(self.items())

    def iterkeys(self):
        return iter(self.keys())

    def itervalues(self):
        return iter(self.values())

    __iter__ = iterkeys


class CfgParserTestCaseClass(unittest.TestCase):
    allow_no_value = False
    delimiters = ('=', ':')
    comment_prefixes = (';', '#')
    inline_comment_prefixes = (';', '#')
    empty_lines_in_values = True
    dict_type = configparser._default_dict
    strict = False
    default_section = configparser.DEFAULTSECT
    interpolation = configparser._UNSET

    def newconfig(self, defaults=None):
        arguments = dict(
            defaults=defaults,
            allow_no_value=self.allow_no_value,
            delimiters=self.delimiters,
            comment_prefixes=self.comment_prefixes,
            inline_comment_prefixes=self.inline_comment_prefixes,
            empty_lines_in_values=self.empty_lines_in_values,
            dict_type=self.dict_type,
            strict=self.strict,
            default_section=self.default_section,
            interpolation=self.interpolation,
        )
        instance = self.config_class(**arguments)
        return instance

    def fromstring(self, string, defaults=None):
        cf = self.newconfig(defaults)
        cf.read_string(string)
        return cf

class BasicTestCase(CfgParserTestCaseClass):

    def basic_test(self, cf):
        E = ['Commented Bar',
             'Foo Bar',
             'Internationalized Stuff',
             'Long Line',
             'Section\\with$weird%characters[\t',
             'Spaces',
             'Spacey Bar',
             'Spacey Bar From The Beginning',
             'Types',
             ]

        if self.allow_no_value:
            E.append('NoValue')
        E.sort()
        F = [('baz', 'qwe'), ('foo', 'bar3')]

        # API access
        L = cf.sections()
        L.sort()
        eq = self.assertEqual
        eq(L, E)
        L = cf.items('Spacey Bar From The Beginning')
        L.sort()
        eq(L, F)

        # mapping access
        L = [section for section in cf]
        L.sort()
        E.append(self.default_section)
        E.sort()
        eq(L, E)
        L = cf['Spacey Bar From The Beginning'].items()
        L = sorted(list(L))
        eq(L, F)
        L = cf.items()
        L = sorted(list(L))
        self.assertEqual(len(L), len(E))
        for name, section in L:
            eq(name, section.name)
        eq(cf.defaults(), cf[self.default_section])

        # The use of spaces in the section names serves as a
        # regression test for SourceForge bug #583248:
        # http://www.python.org/sf/583248

        # API access
        eq(cf.get('Foo Bar', 'foo'), 'bar1')
        eq(cf.get('Spacey Bar', 'foo'), 'bar2')
        eq(cf.get('Spacey Bar From The Beginning', 'foo'), 'bar3')
        eq(cf.get('Spacey Bar From The Beginning', 'baz'), 'qwe')
        eq(cf.get('Commented Bar', 'foo'), 'bar4')
        eq(cf.get('Commented Bar', 'baz'), 'qwe')
        eq(cf.get('Spaces', 'key with spaces'), 'value')
        eq(cf.get('Spaces', 'another with spaces'), 'splat!')
        eq(cf.getint('Types', 'int'), 42)
        eq(cf.get('Types', 'int'), "42")
        self.assertAlmostEqual(cf.getfloat('Types', 'float'), 0.44)
        eq(cf.get('Types', 'float'), "0.44")
        eq(cf.getboolean('Types', 'boolean'), False)
        eq(cf.get('Types', '123'), 'strange but acceptable')
        if self.allow_no_value:
            eq(cf.get('NoValue', 'option-without-value'), None)

        # test vars= and fallback=
        eq(cf.get('Foo Bar', 'foo', fallback='baz'), 'bar1')
        eq(cf.get('Foo Bar', 'foo', vars={'foo': 'baz'}), 'baz')
        with self.assertRaises(configparser.NoSectionError):
            cf.get('No Such Foo Bar', 'foo')
        with self.assertRaises(configparser.NoOptionError):
            cf.get('Foo Bar', 'no-such-foo')
        eq(cf.get('No Such Foo Bar', 'foo', fallback='baz'), 'baz')
        eq(cf.get('Foo Bar', 'no-such-foo', fallback='baz'), 'baz')
        eq(cf.get('Spacey Bar', 'foo', fallback=None), 'bar2')
        eq(cf.get('No Such Spacey Bar', 'foo', fallback=None), None)
        eq(cf.getint('Types', 'int', fallback=18), 42)
        eq(cf.getint('Types', 'no-such-int', fallback=18), 18)
        eq(cf.getint('Types', 'no-such-int', fallback="18"), "18") # sic!
        with self.assertRaises(configparser.NoOptionError):
            cf.getint('Types', 'no-such-int')
        self.assertAlmostEqual(cf.getfloat('Types', 'float',
                                           fallback=0.0), 0.44)
        self.assertAlmostEqual(cf.getfloat('Types', 'no-such-float',
                                           fallback=0.0), 0.0)
        eq(cf.getfloat('Types', 'no-such-float', fallback="0.0"), "0.0") # sic!
        with self.assertRaises(configparser.NoOptionError):
            cf.getfloat('Types', 'no-such-float')
        eq(cf.getboolean('Types', 'boolean', fallback=True), False)
        eq(cf.getboolean('Types', 'no-such-boolean', fallback="yes"),
           "yes") # sic!
        eq(cf.getboolean('Types', 'no-such-boolean', fallback=True), True)
        with self.assertRaises(configparser.NoOptionError):
            cf.getboolean('Types', 'no-such-boolean')
        eq(cf.getboolean('No Such Types', 'boolean', fallback=True), True)
        if self.allow_no_value:
            eq(cf.get('NoValue', 'option-without-value', fallback=False), None)
            eq(cf.get('NoValue', 'no-such-option-without-value',
                      fallback=False), False)

        # mapping access
        eq(cf['Foo Bar']['foo'], 'bar1')
        eq(cf['Spacey Bar']['foo'], 'bar2')
        section = cf['Spacey Bar From The Beginning']
        eq(section.name, 'Spacey Bar From The Beginning')
        self.assertIs(section.parser, cf)
        with self.assertRaises(AttributeError):
            section.name = 'Name is read-only'
        with self.assertRaises(AttributeError):
            section.parser = 'Parser is read-only'
        eq(section['foo'], 'bar3')
        eq(section['baz'], 'qwe')
        eq(cf['Commented Bar']['foo'], 'bar4')
        eq(cf['Commented Bar']['baz'], 'qwe')
        eq(cf['Spaces']['key with spaces'], 'value')
        eq(cf['Spaces']['another with spaces'], 'splat!')
        eq(cf['Long Line']['foo'],
           'this line is much, much longer than my editor\nlikes it.')
        if self.allow_no_value:
            eq(cf['NoValue']['option-without-value'], None)
        # test vars= and fallback=
        eq(cf['Foo Bar'].get('foo', 'baz'), 'bar1')
        eq(cf['Foo Bar'].get('foo', fallback='baz'), 'bar1')
        eq(cf['Foo Bar'].get('foo', vars={'foo': 'baz'}), 'baz')
        with self.assertRaises(KeyError):
            cf['No Such Foo Bar']['foo']
        with self.assertRaises(KeyError):
            cf['Foo Bar']['no-such-foo']
        with self.assertRaises(KeyError):
            cf['No Such Foo Bar'].get('foo', fallback='baz')
        eq(cf['Foo Bar'].get('no-such-foo', 'baz'), 'baz')
        eq(cf['Foo Bar'].get('no-such-foo', fallback='baz'), 'baz')
        eq(cf['Foo Bar'].get('no-such-foo'), None)
        eq(cf['Spacey Bar'].get('foo', None), 'bar2')
        eq(cf['Spacey Bar'].get('foo', fallback=None), 'bar2')
        with self.assertRaises(KeyError):
            cf['No Such Spacey Bar'].get('foo', None)
        eq(cf['Types'].getint('int', 18), 42)
        eq(cf['Types'].getint('int', fallback=18), 42)
        eq(cf['Types'].getint('no-such-int', 18), 18)
        eq(cf['Types'].getint('no-such-int', fallback=18), 18)
        eq(cf['Types'].getint('no-such-int', "18"), "18") # sic!
        eq(cf['Types'].getint('no-such-int', fallback="18"), "18") # sic!
        eq(cf['Types'].getint('no-such-int'), None)
        self.assertAlmostEqual(cf['Types'].getfloat('float', 0.0), 0.44)
        self.assertAlmostEqual(cf['Types'].getfloat('float',
                                                    fallback=0.0), 0.44)
        self.assertAlmostEqual(cf['Types'].getfloat('no-such-float', 0.0), 0.0)
        self.assertAlmostEqual(cf['Types'].getfloat('no-such-float',
                                                    fallback=0.0), 0.0)
        eq(cf['Types'].getfloat('no-such-float', "0.0"), "0.0") # sic!
        eq(cf['Types'].getfloat('no-such-float', fallback="0.0"), "0.0") # sic!
        eq(cf['Types'].getfloat('no-such-float'), None)
        eq(cf['Types'].getboolean('boolean', True), False)
        eq(cf['Types'].getboolean('boolean', fallback=True), False)
        eq(cf['Types'].getboolean('no-such-boolean', "yes"), "yes") # sic!
        eq(cf['Types'].getboolean('no-such-boolean', fallback="yes"),
           "yes") # sic!
        eq(cf['Types'].getboolean('no-such-boolean', True), True)
        eq(cf['Types'].getboolean('no-such-boolean', fallback=True), True)
        eq(cf['Types'].getboolean('no-such-boolean'), None)
        if self.allow_no_value:
            eq(cf['NoValue'].get('option-without-value', False), None)
            eq(cf['NoValue'].get('option-without-value', fallback=False), None)
            eq(cf['NoValue'].get('no-such-option-without-value', False), False)
            eq(cf['NoValue'].get('no-such-option-without-value',
                      fallback=False), False)

        # Make sure the right things happen for remove_section() and
        # remove_option(); added to include check for SourceForge bug #123324.

        cf[self.default_section]['this_value'] = '1'
        cf[self.default_section]['that_value'] = '2'

        # API access
        self.assertTrue(cf.remove_section('Spaces'))
        self.assertFalse(cf.has_option('Spaces', 'key with spaces'))
        self.assertFalse(cf.remove_section('Spaces'))
        self.assertFalse(cf.remove_section(self.default_section))
        self.assertTrue(cf.remove_option('Foo Bar', 'foo'),
                        "remove_option() failed to report existence of option")
        self.assertFalse(cf.has_option('Foo Bar', 'foo'),
                    "remove_option() failed to remove option")
        self.assertFalse(cf.remove_option('Foo Bar', 'foo'),
                    "remove_option() failed to report non-existence of option"
                    " that was removed")
        self.assertTrue(cf.has_option('Foo Bar', 'this_value'))
        self.assertFalse(cf.remove_option('Foo Bar', 'this_value'))
        self.assertTrue(cf.remove_option(self.default_section, 'this_value'))
        self.assertFalse(cf.has_option('Foo Bar', 'this_value'))
        self.assertFalse(cf.remove_option(self.default_section, 'this_value'))

        with self.assertRaises(configparser.NoSectionError) as cm:
            cf.remove_option('No Such Section', 'foo')
        self.assertEqual(cm.exception.args, ('No Such Section',))

        eq(cf.get('Long Line', 'foo'),
           'this line is much, much longer than my editor\nlikes it.')

        # mapping access
        del cf['Types']
        self.assertFalse('Types' in cf)
        with self.assertRaises(KeyError):
            del cf['Types']
        with self.assertRaises(ValueError):
            del cf[self.default_section]
        del cf['Spacey Bar']['foo']
        self.assertFalse('foo' in cf['Spacey Bar'])
        with self.assertRaises(KeyError):
            del cf['Spacey Bar']['foo']
        self.assertTrue('that_value' in cf['Spacey Bar'])
        with self.assertRaises(KeyError):
            del cf['Spacey Bar']['that_value']
        del cf[self.default_section]['that_value']
        self.assertFalse('that_value' in cf['Spacey Bar'])
        with self.assertRaises(KeyError):
            del cf[self.default_section]['that_value']
        with self.assertRaises(KeyError):
            del cf['No Such Section']['foo']

        # Don't add new asserts below in this method as most of the options
        # and sections are now removed.

    def test_basic(self):
        config_string = """\
[Foo Bar]
foo{0[0]}bar1
[Spacey Bar]
foo {0[0]} bar2
[Spacey Bar From The Beginning]
  foo {0[0]} bar3
  baz {0[0]} qwe
[Commented Bar]
foo{0[1]} bar4 {1[1]} comment
baz{0[0]}qwe {1[0]}another one
[Long Line]
foo{0[1]} this line is much, much longer than my editor
   likes it.
[Section\\with$weird%characters[\t]
[Internationalized Stuff]
foo[bg]{0[1]} Bulgarian
foo{0[0]}Default
foo[en]{0[0]}English
foo[de]{0[0]}Deutsch
[Spaces]
key with spaces {0[1]} value
another with spaces {0[0]} splat!
[Types]
int {0[1]} 42
float {0[0]} 0.44
boolean {0[0]} NO
123 {0[1]} strange but acceptable
""".format(self.delimiters, self.comment_prefixes)
        if self.allow_no_value:
            config_string += (
                "[NoValue]\n"
                "option-without-value\n"
                )
        cf = self.fromstring(config_string)
        self.basic_test(cf)
        if self.strict:
            with self.assertRaises(configparser.DuplicateOptionError):
                cf.read_string(textwrap.dedent("""\
                    [Duplicate Options Here]
                    option {0[0]} with a value
                    option {0[1]} with another value
                """.format(self.delimiters)))
            with self.assertRaises(configparser.DuplicateSectionError):
                cf.read_string(textwrap.dedent("""\
                    [And Now For Something]
                    completely different {0[0]} True
                    [And Now For Something]
                    the larch {0[1]} 1
                """.format(self.delimiters)))
        else:
            cf.read_string(textwrap.dedent("""\
                [Duplicate Options Here]
                option {0[0]} with a value
                option {0[1]} with another value
            """.format(self.delimiters)))

            cf.read_string(textwrap.dedent("""\
                [And Now For Something]
                completely different {0[0]} True
                [And Now For Something]
                the larch {0[1]} 1
            """.format(self.delimiters)))

    def test_basic_from_dict(self):
        config = {
            "Foo Bar": {
                "foo": "bar1",
            },
            "Spacey Bar": {
                "foo": "bar2",
            },
            "Spacey Bar From The Beginning": {
                "foo": "bar3",
                "baz": "qwe",
            },
            "Commented Bar": {
                "foo": "bar4",
                "baz": "qwe",
            },
            "Long Line": {
                "foo": "this line is much, much longer than my editor\nlikes "
                       "it.",
            },
            "Section\\with$weird%characters[\t": {
            },
            "Internationalized Stuff": {
                "foo[bg]": "Bulgarian",
                "foo": "Default",
                "foo[en]": "English",
                "foo[de]": "Deutsch",
            },
            "Spaces": {
                "key with spaces": "value",
                "another with spaces": "splat!",
            },
            "Types": {
                "int": 42,
                "float": 0.44,
                "boolean": False,
                123: "strange but acceptable",
            },
        }
        if self.allow_no_value:
            config.update({
                "NoValue": {
                    "option-without-value": None,
                }
            })
        cf = self.newconfig()
        cf.read_dict(config)
        self.basic_test(cf)
        if self.strict:
            with self.assertRaises(configparser.DuplicateSectionError):
                cf.read_dict({
                    '1': {'key': 'value'},
                    1: {'key2': 'value2'},
                })
            with self.assertRaises(configparser.DuplicateOptionError):
                cf.read_dict({
                    "Duplicate Options Here": {
                        'option': 'with a value',
                        'OPTION': 'with another value',
                    },
                })
        else:
            cf.read_dict({
                'section': {'key': 'value'},
                'SECTION': {'key2': 'value2'},
            })
            cf.read_dict({
                "Duplicate Options Here": {
                    'option': 'with a value',
                    'OPTION': 'with another value',
                },
            })

    def test_case_sensitivity(self):
        cf = self.newconfig()
        cf.add_section("A")
        cf.add_section("a")
        cf.add_section("B")
        L = cf.sections()
        L.sort()
        eq = self.assertEqual
        eq(L, ["A", "B", "a"])
        cf.set("a", "B", "value")
        eq(cf.options("a"), ["b"])
        eq(cf.get("a", "b"), "value",
           "could not locate option, expecting case-insensitive option names")
        with self.assertRaises(configparser.NoSectionError):
            # section names are case-sensitive
            cf.set("b", "A", "value")
        self.assertTrue(cf.has_option("a", "b"))
        self.assertFalse(cf.has_option("b", "b"))
        cf.set("A", "A-B", "A-B value")
        for opt in ("a-b", "A-b", "a-B", "A-B"):
            self.assertTrue(
                cf.has_option("A", opt),
                "has_option() returned false for option which should exist")
        eq(cf.options("A"), ["a-b"])
        eq(cf.options("a"), ["b"])
        cf.remove_option("a", "B")
        eq(cf.options("a"), [])

        # SF bug #432369:
        cf = self.fromstring(
            "[MySection]\nOption{} first line   \n\tsecond line   \n".format(
                self.delimiters[0]))
        eq(cf.options("MySection"), ["option"])
        eq(cf.get("MySection", "Option"), "first line\nsecond line")

        # SF bug #561822:
        cf = self.fromstring("[section]\n"
                             "nekey{}nevalue\n".format(self.delimiters[0]),
                             defaults={"key":"value"})
        self.assertTrue(cf.has_option("section", "Key"))


    def test_case_sensitivity_mapping_access(self):
        cf = self.newconfig()
        cf["A"] = {}
        cf["a"] = {"B": "value"}
        cf["B"] = {}
        L = [section for section in cf]
        L.sort()
        eq = self.assertEqual
        elem_eq = self.assertCountEqual
        eq(L, sorted(["A", "B", self.default_section, "a"]))
        eq(cf["a"].keys(), {"b"})
        eq(cf["a"]["b"], "value",
           "could not locate option, expecting case-insensitive option names")
        with self.assertRaises(KeyError):
            # section names are case-sensitive
            cf["b"]["A"] = "value"
        self.assertTrue("b" in cf["a"])
        cf["A"]["A-B"] = "A-B value"
        for opt in ("a-b", "A-b", "a-B", "A-B"):
            self.assertTrue(
                opt in cf["A"],
                "has_option() returned false for option which should exist")
        eq(cf["A"].keys(), {"a-b"})
        eq(cf["a"].keys(), {"b"})
        del cf["a"]["B"]
        elem_eq(cf["a"].keys(), {})

        # SF bug #432369:
        cf = self.fromstring(
            "[MySection]\nOption{} first line   \n\tsecond line   \n".format(
                self.delimiters[0]))
        eq(cf["MySection"].keys(), {"option"})
        eq(cf["MySection"]["Option"], "first line\nsecond line")

        # SF bug #561822:
        cf = self.fromstring("[section]\n"
                             "nekey{}nevalue\n".format(self.delimiters[0]),
                             defaults={"key":"value"})
        self.assertTrue("Key" in cf["section"])

    def test_default_case_sensitivity(self):
        cf = self.newconfig({"foo": "Bar"})
        self.assertEqual(
            cf.get(self.default_section, "Foo"), "Bar",
            "could not locate option, expecting case-insensitive option names")
        cf = self.newconfig({"Foo": "Bar"})
        self.assertEqual(
            cf.get(self.default_section, "Foo"), "Bar",
            "could not locate option, expecting case-insensitive defaults")

    def test_parse_errors(self):
        cf = self.newconfig()
        self.parse_error(cf, configparser.ParsingError,
                         "[Foo]\n"
                         "{}val-without-opt-name\n".format(self.delimiters[0]))
        self.parse_error(cf, configparser.ParsingError,
                         "[Foo]\n"
                         "{}val-without-opt-name\n".format(self.delimiters[1]))
        e = self.parse_error(cf, configparser.MissingSectionHeaderError,
                             "No Section!\n")
        self.assertEqual(e.args, ('<???>', 1, "No Section!\n"))
        if not self.allow_no_value:
            e = self.parse_error(cf, configparser.ParsingError,
                                "[Foo]\n  wrong-indent\n")
            self.assertEqual(e.args, ('<???>',))
            # read_file on a real file
            tricky = support.findfile("cfgparser.3")
            if self.delimiters[0] == '=':
                error = configparser.ParsingError
                expected = (tricky,)
            else:
                error = configparser.MissingSectionHeaderError
                expected = (tricky, 1,
                            '  # INI with as many tricky parts as possible\n')
            with open(tricky, encoding='utf-8') as f:
                e = self.parse_error(cf, error, f)
            self.assertEqual(e.args, expected)

    def parse_error(self, cf, exc, src):
        if hasattr(src, 'readline'):
            sio = src
        else:
            sio = io.StringIO(src)
        with self.assertRaises(exc) as cm:
            cf.read_file(sio)
        return cm.exception

    def test_query_errors(self):
        cf = self.newconfig()
        self.assertEqual(cf.sections(), [],
                         "new ConfigParser should have no defined sections")
        self.assertFalse(cf.has_section("Foo"),
                         "new ConfigParser should have no acknowledged "
                         "sections")
        with self.assertRaises(configparser.NoSectionError):
            cf.options("Foo")
        with self.assertRaises(configparser.NoSectionError):
            cf.set("foo", "bar", "value")
        e = self.get_error(cf, configparser.NoSectionError, "foo", "bar")
        self.assertEqual(e.args, ("foo",))
        cf.add_section("foo")
        e = self.get_error(cf, configparser.NoOptionError, "foo", "bar")
        self.assertEqual(e.args, ("bar", "foo"))

    def get_error(self, cf, exc, section, option):
        try:
            cf.get(section, option)
        except exc as e:
            return e
        else:
            self.fail("expected exception type %s.%s"
                      % (exc.__module__, exc.__name__))

    def test_boolean(self):
        cf = self.fromstring(
            "[BOOLTEST]\n"
            "T1{equals}1\n"
            "T2{equals}TRUE\n"
            "T3{equals}True\n"
            "T4{equals}oN\n"
            "T5{equals}yes\n"
            "F1{equals}0\n"
            "F2{equals}FALSE\n"
            "F3{equals}False\n"
            "F4{equals}oFF\n"
            "F5{equals}nO\n"
            "E1{equals}2\n"
            "E2{equals}foo\n"
            "E3{equals}-1\n"
            "E4{equals}0.1\n"
            "E5{equals}FALSE AND MORE".format(equals=self.delimiters[0])
            )
        for x in range(1, 5):
            self.assertTrue(cf.getboolean('BOOLTEST', 't%d' % x))
            self.assertFalse(cf.getboolean('BOOLTEST', 'f%d' % x))
            self.assertRaises(ValueError,
                              cf.getboolean, 'BOOLTEST', 'e%d' % x)

    def test_weird_errors(self):
        cf = self.newconfig()
        cf.add_section("Foo")
        with self.assertRaises(configparser.DuplicateSectionError) as cm:
            cf.add_section("Foo")
        e = cm.exception
        self.assertEqual(str(e), "Section 'Foo' already exists")
        self.assertEqual(e.args, ("Foo", None, None))

        if self.strict:
            with self.assertRaises(configparser.DuplicateSectionError) as cm:
                cf.read_string(textwrap.dedent("""\
                    [Foo]
                    will this be added{equals}True
                    [Bar]
                    what about this{equals}True
                    [Foo]
                    oops{equals}this won't
                """.format(equals=self.delimiters[0])), source='<foo-bar>')
            e = cm.exception
            self.assertEqual(str(e), "While reading from <foo-bar> [line  5]: "
                                     "section 'Foo' already exists")
            self.assertEqual(e.args, ("Foo", '<foo-bar>', 5))

            with self.assertRaises(configparser.DuplicateOptionError) as cm:
                cf.read_dict({'Bar': {'opt': 'val', 'OPT': 'is really `opt`'}})
            e = cm.exception
            self.assertEqual(str(e), "While reading from <dict>: option 'opt' "
                                     "in section 'Bar' already exists")
            self.assertEqual(e.args, ("Bar", "opt", "<dict>", None))

    def test_write(self):
        config_string = (
            "[Long Line]\n"
            "foo{0[0]} this line is much, much longer than my editor\n"
            "   likes it.\n"
            "[{default_section}]\n"
            "foo{0[1]} another very\n"
            " long line\n"
            "[Long Line - With Comments!]\n"
            "test {0[1]} we        {comment} can\n"
            "            also      {comment} place\n"
            "            comments  {comment} in\n"
            "            multiline {comment} values"
            "\n".format(self.delimiters, comment=self.comment_prefixes[0],
                        default_section=self.default_section)
            )
        if self.allow_no_value:
            config_string += (
            "[Valueless]\n"
            "option-without-value\n"
            )

        cf = self.fromstring(config_string)
        for space_around_delimiters in (True, False):
            output = io.StringIO()
            cf.write(output, space_around_delimiters=space_around_delimiters)
            delimiter = self.delimiters[0]
            if space_around_delimiters:
                delimiter = " {} ".format(delimiter)
            expect_string = (
                "[{default_section}]\n"
                "foo{equals}another very\n"
                "\tlong line\n"
                "\n"
                "[Long Line]\n"
                "foo{equals}this line is much, much longer than my editor\n"
                "\tlikes it.\n"
                "\n"
                "[Long Line - With Comments!]\n"
                "test{equals}we\n"
                "\talso\n"
                "\tcomments\n"
                "\tmultiline\n"
                "\n".format(equals=delimiter,
                            default_section=self.default_section)
                )
            if self.allow_no_value:
                expect_string += (
                    "[Valueless]\n"
                    "option-without-value\n"
                    "\n"
                    )
            self.assertEqual(output.getvalue(), expect_string)

    def test_set_string_types(self):
        cf = self.fromstring("[sect]\n"
                             "option1{eq}foo\n".format(eq=self.delimiters[0]))
        # Check that we don't get an exception when setting values in
        # an existing section using strings:
        class mystr(str):
            pass
        cf.set("sect", "option1", "splat")
        cf.set("sect", "option1", mystr("splat"))
        cf.set("sect", "option2", "splat")
        cf.set("sect", "option2", mystr("splat"))
        cf.set("sect", "option1", "splat")
        cf.set("sect", "option2", "splat")

    def test_read_returns_file_list(self):
        if self.delimiters[0] != '=':
            # skip reading the file if we're using an incompatible format
            return
        file1 = support.findfile("cfgparser.1")
        # check when we pass a mix of readable and non-readable files:
        cf = self.newconfig()
        parsed_files = cf.read([file1, "nonexistent-file"])
        self.assertEqual(parsed_files, [file1])
        self.assertEqual(cf.get("Foo Bar", "foo"), "newbar")
        # check when we pass only a filename:
        cf = self.newconfig()
        parsed_files = cf.read(file1)
        self.assertEqual(parsed_files, [file1])
        self.assertEqual(cf.get("Foo Bar", "foo"), "newbar")
        # check when we pass only missing files:
        cf = self.newconfig()
        parsed_files = cf.read(["nonexistent-file"])
        self.assertEqual(parsed_files, [])
        # check when we pass no files:
        cf = self.newconfig()
        parsed_files = cf.read([])
        self.assertEqual(parsed_files, [])

    # shared by subclasses
    def get_interpolation_config(self):
        return self.fromstring(
            "[Foo]\n"
            "bar{equals}something %(with1)s interpolation (1 step)\n"
            "bar9{equals}something %(with9)s lots of interpolation (9 steps)\n"
            "bar10{equals}something %(with10)s lots of interpolation (10 steps)\n"
            "bar11{equals}something %(with11)s lots of interpolation (11 steps)\n"
            "with11{equals}%(with10)s\n"
            "with10{equals}%(with9)s\n"
            "with9{equals}%(with8)s\n"
            "with8{equals}%(With7)s\n"
            "with7{equals}%(WITH6)s\n"
            "with6{equals}%(with5)s\n"
            "With5{equals}%(with4)s\n"
            "WITH4{equals}%(with3)s\n"
            "with3{equals}%(with2)s\n"
            "with2{equals}%(with1)s\n"
            "with1{equals}with\n"
            "\n"
            "[Mutual Recursion]\n"
            "foo{equals}%(bar)s\n"
            "bar{equals}%(foo)s\n"
            "\n"
            "[Interpolation Error]\n"
            # no definition for 'reference'
            "name{equals}%(reference)s\n".format(equals=self.delimiters[0]))

    def check_items_config(self, expected):
        cf = self.fromstring("""
            [section]
            name {0[0]} %(value)s
            key{0[1]} |%(name)s|
            getdefault{0[1]} |%(default)s|
        """.format(self.delimiters), defaults={"default": "<default>"})
        L = list(cf.items("section", vars={'value': 'value'}))
        L.sort()
        self.assertEqual(L, expected)
        with self.assertRaises(configparser.NoSectionError):
            cf.items("no such section")

    def test_popitem(self):
        cf = self.fromstring("""
            [section1]
            name1 {0[0]} value1
            [section2]
            name2 {0[0]} value2
            [section3]
            name3 {0[0]} value3
        """.format(self.delimiters), defaults={"default": "<default>"})
        self.assertEqual(cf.popitem()[0], 'section1')
        self.assertEqual(cf.popitem()[0], 'section2')
        self.assertEqual(cf.popitem()[0], 'section3')
        with self.assertRaises(KeyError):
            cf.popitem()

    def test_clear(self):
        cf = self.newconfig({"foo": "Bar"})
        self.assertEqual(
            cf.get(self.default_section, "Foo"), "Bar",
            "could not locate option, expecting case-insensitive option names")
        cf['zing'] = {'option1': 'value1', 'option2': 'value2'}
        self.assertEqual(cf.sections(), ['zing'])
        self.assertEqual(set(cf['zing'].keys()), {'option1', 'option2', 'foo'})
        cf.clear()
        self.assertEqual(set(cf.sections()), set())
        self.assertEqual(set(cf[self.default_section].keys()), {'foo'})


class StrictTestCase(BasicTestCase):
    config_class = configparser.RawConfigParser
    strict = True


class ConfigParserTestCase(BasicTestCase):
    config_class = configparser.ConfigParser

    def test_interpolation(self):
        cf = self.get_interpolation_config()
        eq = self.assertEqual
        eq(cf.get("Foo", "bar"), "something with interpolation (1 step)")
        eq(cf.get("Foo", "bar9"),
           "something with lots of interpolation (9 steps)")
        eq(cf.get("Foo", "bar10"),
           "something with lots of interpolation (10 steps)")
        e = self.get_error(cf, configparser.InterpolationDepthError, "Foo", "bar11")
        if self.interpolation == configparser._UNSET:
            self.assertEqual(e.args, ("bar11", "Foo", "%(with1)s"))
        elif isinstance(self.interpolation, configparser.LegacyInterpolation):
            self.assertEqual(e.args, ("bar11", "Foo",
                "something %(with11)s lots of interpolation (11 steps)"))

    def test_interpolation_missing_value(self):
        cf = self.get_interpolation_config()
        e = self.get_error(cf, configparser.InterpolationMissingOptionError,
                           "Interpolation Error", "name")
        self.assertEqual(e.reference, "reference")
        self.assertEqual(e.section, "Interpolation Error")
        self.assertEqual(e.option, "name")
        if self.interpolation == configparser._UNSET:
            self.assertEqual(e.args, ('name', 'Interpolation Error',
                                    '', 'reference'))
        elif isinstance(self.interpolation, configparser.LegacyInterpolation):
            self.assertEqual(e.args, ('name', 'Interpolation Error',
                                    '%(reference)s', 'reference'))

    def test_items(self):
        self.check_items_config([('default', '<default>'),
                                 ('getdefault', '|<default>|'),
                                 ('key', '|value|'),
                                 ('name', 'value'),
                                 ('value', 'value')])

    def test_safe_interpolation(self):
        # See http://www.python.org/sf/511737
        cf = self.fromstring("[section]\n"
                             "option1{eq}xxx\n"
                             "option2{eq}%(option1)s/xxx\n"
                             "ok{eq}%(option1)s/%%s\n"
                             "not_ok{eq}%(option2)s/%%s".format(
                                 eq=self.delimiters[0]))
        self.assertEqual(cf.get("section", "ok"), "xxx/%s")
        if self.interpolation == configparser._UNSET:
            self.assertEqual(cf.get("section", "not_ok"), "xxx/xxx/%s")
        elif isinstance(self.interpolation, configparser.LegacyInterpolation):
            with self.assertRaises(TypeError):
                cf.get("section", "not_ok")

    def test_set_malformatted_interpolation(self):
        cf = self.fromstring("[sect]\n"
                             "option1{eq}foo\n".format(eq=self.delimiters[0]))

        self.assertEqual(cf.get('sect', "option1"), "foo")

        self.assertRaises(ValueError, cf.set, "sect", "option1", "%foo")
        self.assertRaises(ValueError, cf.set, "sect", "option1", "foo%")
        self.assertRaises(ValueError, cf.set, "sect", "option1", "f%oo")

        self.assertEqual(cf.get('sect', "option1"), "foo")

        # bug #5741: double percents are *not* malformed
        cf.set("sect", "option2", "foo%%bar")
        self.assertEqual(cf.get("sect", "option2"), "foo%bar")

    def test_set_nonstring_types(self):
        cf = self.fromstring("[sect]\n"
                             "option1{eq}foo\n".format(eq=self.delimiters[0]))
        # Check that we get a TypeError when setting non-string values
        # in an existing section:
        self.assertRaises(TypeError, cf.set, "sect", "option1", 1)
        self.assertRaises(TypeError, cf.set, "sect", "option1", 1.0)
        self.assertRaises(TypeError, cf.set, "sect", "option1", object())
        self.assertRaises(TypeError, cf.set, "sect", "option2", 1)
        self.assertRaises(TypeError, cf.set, "sect", "option2", 1.0)
        self.assertRaises(TypeError, cf.set, "sect", "option2", object())
        self.assertRaises(TypeError, cf.set, "sect", 123, "invalid opt name!")
        self.assertRaises(TypeError, cf.add_section, 123)

    def test_add_section_default(self):
        cf = self.newconfig()
        self.assertRaises(ValueError, cf.add_section, self.default_section)


class ConfigParserTestCaseNoInterpolation(BasicTestCase):
    config_class = configparser.ConfigParser
    interpolation = None
    ini = textwrap.dedent("""
        [numbers]
        one = 1
        two = %(one)s * 2
        three = ${common:one} * 3

        [hexen]
        sixteen = ${numbers:two} * 8
    """).strip()

    def assertMatchesIni(self, cf):
        self.assertEqual(cf['numbers']['one'], '1')
        self.assertEqual(cf['numbers']['two'], '%(one)s * 2')
        self.assertEqual(cf['numbers']['three'], '${common:one} * 3')
        self.assertEqual(cf['hexen']['sixteen'], '${numbers:two} * 8')

    def test_no_interpolation(self):
        cf = self.fromstring(self.ini)
        self.assertMatchesIni(cf)

    def test_empty_case(self):
        cf = self.newconfig()
        self.assertIsNone(cf.read_string(""))

    def test_none_as_default_interpolation(self):
        class CustomConfigParser(configparser.ConfigParser):
            _DEFAULT_INTERPOLATION = None

        cf = CustomConfigParser()
        cf.read_string(self.ini)
        self.assertMatchesIni(cf)


class ConfigParserTestCaseLegacyInterpolation(ConfigParserTestCase):
    config_class = configparser.ConfigParser
    interpolation = configparser.LegacyInterpolation()

    def test_set_malformatted_interpolation(self):
        cf = self.fromstring("[sect]\n"
                             "option1{eq}foo\n".format(eq=self.delimiters[0]))

        self.assertEqual(cf.get('sect', "option1"), "foo")

        cf.set("sect", "option1", "%foo")
        self.assertEqual(cf.get('sect', "option1"), "%foo")
        cf.set("sect", "option1", "foo%")
        self.assertEqual(cf.get('sect', "option1"), "foo%")
        cf.set("sect", "option1", "f%oo")
        self.assertEqual(cf.get('sect', "option1"), "f%oo")

        # bug #5741: double percents are *not* malformed
        cf.set("sect", "option2", "foo%%bar")
        self.assertEqual(cf.get("sect", "option2"), "foo%%bar")

class ConfigParserTestCaseNonStandardDelimiters(ConfigParserTestCase):
    delimiters = (':=', '$')
    comment_prefixes = ('//', '"')
    inline_comment_prefixes = ('//', '"')

class ConfigParserTestCaseNonStandardDefaultSection(ConfigParserTestCase):
    default_section = 'general'

class MultilineValuesTestCase(BasicTestCase):
    config_class = configparser.ConfigParser
    wonderful_spam = ("I'm having spam spam spam spam "
                      "spam spam spam beaked beans spam "
                      "spam spam and spam!").replace(' ', '\t\n')

    def setUp(self):
        cf = self.newconfig()
        for i in range(100):
            s = 'section{}'.format(i)
            cf.add_section(s)
            for j in range(10):
                cf.set(s, 'lovely_spam{}'.format(j), self.wonderful_spam)
        with open(support.TESTFN, 'w') as f:
            cf.write(f)

    def tearDown(self):
        os.unlink(support.TESTFN)

    def test_dominating_multiline_values(self):
        # We're reading from file because this is where the code changed
        # during performance updates in Python 3.2
        cf_from_file = self.newconfig()
        with open(support.TESTFN) as f:
            cf_from_file.read_file(f)
        self.assertEqual(cf_from_file.get('section8', 'lovely_spam4'),
                         self.wonderful_spam.replace('\t\n', '\n'))

class RawConfigParserTestCase(BasicTestCase):
    config_class = configparser.RawConfigParser

    def test_interpolation(self):
        cf = self.get_interpolation_config()
        eq = self.assertEqual
        eq(cf.get("Foo", "bar"),
           "something %(with1)s interpolation (1 step)")
        eq(cf.get("Foo", "bar9"),
           "something %(with9)s lots of interpolation (9 steps)")
        eq(cf.get("Foo", "bar10"),
           "something %(with10)s lots of interpolation (10 steps)")
        eq(cf.get("Foo", "bar11"),
           "something %(with11)s lots of interpolation (11 steps)")

    def test_items(self):
        self.check_items_config([('default', '<default>'),
                                 ('getdefault', '|%(default)s|'),
                                 ('key', '|%(name)s|'),
                                 ('name', '%(value)s'),
                                 ('value', 'value')])

    def test_set_nonstring_types(self):
        cf = self.newconfig()
        cf.add_section('non-string')
        cf.set('non-string', 'int', 1)
        cf.set('non-string', 'list', [0, 1, 1, 2, 3, 5, 8, 13])
        cf.set('non-string', 'dict', {'pi': 3.14159})
        self.assertEqual(cf.get('non-string', 'int'), 1)
        self.assertEqual(cf.get('non-string', 'list'),
                         [0, 1, 1, 2, 3, 5, 8, 13])
        self.assertEqual(cf.get('non-string', 'dict'), {'pi': 3.14159})
        cf.add_section(123)
        cf.set(123, 'this is sick', True)
        self.assertEqual(cf.get(123, 'this is sick'), True)
        if cf._dict is configparser._default_dict:
            # would not work for SortedDict; only checking for the most common
            # default dictionary (OrderedDict)
            cf.optionxform = lambda x: x
            cf.set('non-string', 1, 1)
            self.assertEqual(cf.get('non-string', 1), 1)

class RawConfigParserTestCaseNonStandardDelimiters(RawConfigParserTestCase):
    delimiters = (':=', '$')
    comment_prefixes = ('//', '"')
    inline_comment_prefixes = ('//', '"')

class RawConfigParserTestSambaConf(CfgParserTestCaseClass):
    config_class = configparser.RawConfigParser
    comment_prefixes = ('#', ';', '----')
    inline_comment_prefixes = ('//',)
    empty_lines_in_values = False

    def test_reading(self):
        smbconf = support.findfile("cfgparser.2")
        # check when we pass a mix of readable and non-readable files:
        cf = self.newconfig()
        parsed_files = cf.read([smbconf, "nonexistent-file"], encoding='utf-8')
        self.assertEqual(parsed_files, [smbconf])
        sections = ['global', 'homes', 'printers',
                    'print$', 'pdf-generator', 'tmp', 'Agustin']
        self.assertEqual(cf.sections(), sections)
        self.assertEqual(cf.get("global", "workgroup"), "MDKGROUP")
        self.assertEqual(cf.getint("global", "max log size"), 50)
        self.assertEqual(cf.get("global", "hosts allow"), "127.")
        self.assertEqual(cf.get("tmp", "echo command"), "cat %s; rm %s")

class ConfigParserTestCaseExtendedInterpolation(BasicTestCase):
    config_class = configparser.ConfigParser
    interpolation = configparser.ExtendedInterpolation()
    default_section = 'common'
    strict = True

    def fromstring(self, string, defaults=None, optionxform=None):
        cf = self.newconfig(defaults)
        if optionxform:
            cf.optionxform = optionxform
        cf.read_string(string)
        return cf

    def test_extended_interpolation(self):
        cf = self.fromstring(textwrap.dedent("""
            [common]
            favourite Beatle = Paul
            favourite color = green

            [tom]
            favourite band = ${favourite color} day
            favourite pope = John ${favourite Beatle} II
            sequel = ${favourite pope}I

            [ambv]
            favourite Beatle = George
            son of Edward VII = ${favourite Beatle} V
            son of George V = ${son of Edward VII}I

            [stanley]
            favourite Beatle = ${ambv:favourite Beatle}
            favourite pope = ${tom:favourite pope}
            favourite color = black
            favourite state of mind = paranoid
            favourite movie = soylent ${common:favourite color}
            favourite song = ${favourite color} sabbath - ${favourite state of mind}
        """).strip())

        eq = self.assertEqual
        eq(cf['common']['favourite Beatle'], 'Paul')
        eq(cf['common']['favourite color'], 'green')
        eq(cf['tom']['favourite Beatle'], 'Paul')
        eq(cf['tom']['favourite color'], 'green')
        eq(cf['tom']['favourite band'], 'green day')
        eq(cf['tom']['favourite pope'], 'John Paul II')
        eq(cf['tom']['sequel'], 'John Paul III')
        eq(cf['ambv']['favourite Beatle'], 'George')
        eq(cf['ambv']['favourite color'], 'green')
        eq(cf['ambv']['son of Edward VII'], 'George V')
        eq(cf['ambv']['son of George V'], 'George VI')
        eq(cf['stanley']['favourite Beatle'], 'George')
        eq(cf['stanley']['favourite color'], 'black')
        eq(cf['stanley']['favourite state of mind'], 'paranoid')
        eq(cf['stanley']['favourite movie'], 'soylent green')
        eq(cf['stanley']['favourite pope'], 'John Paul II')
        eq(cf['stanley']['favourite song'],
           'black sabbath - paranoid')

    def test_endless_loop(self):
        cf = self.fromstring(textwrap.dedent("""
            [one for you]
            ping = ${one for me:pong}

            [one for me]
            pong = ${one for you:ping}

            [selfish]
            me = ${me}
        """).strip())

        with self.assertRaises(configparser.InterpolationDepthError):
            cf['one for you']['ping']
        with self.assertRaises(configparser.InterpolationDepthError):
            cf['selfish']['me']

    def test_strange_options(self):
        cf = self.fromstring("""
            [dollars]
            $var = $$value
            $var2 = ${$var}
            ${sick} = cannot interpolate me

            [interpolated]
            $other = ${dollars:$var}
            $trying = ${dollars:${sick}}
        """)

        self.assertEqual(cf['dollars']['$var'], '$value')
        self.assertEqual(cf['interpolated']['$other'], '$value')
        self.assertEqual(cf['dollars']['${sick}'], 'cannot interpolate me')
        exception_class = configparser.InterpolationMissingOptionError
        with self.assertRaises(exception_class) as cm:
            cf['interpolated']['$trying']
        self.assertEqual(cm.exception.reference, 'dollars:${sick')
        self.assertEqual(cm.exception.args[2], '}') #rawval

    def test_case_sensitivity_basic(self):
        ini = textwrap.dedent("""
            [common]
            optionlower = value
            OptionUpper = Value

            [Common]
            optionlower = a better ${common:optionlower}
            OptionUpper = A Better ${common:OptionUpper}

            [random]
            foolower = ${common:optionlower} redefined
            FooUpper = ${Common:OptionUpper} Redefined
        """).strip()

        cf = self.fromstring(ini)
        eq = self.assertEqual
        eq(cf['common']['optionlower'], 'value')
        eq(cf['common']['OptionUpper'], 'Value')
        eq(cf['Common']['optionlower'], 'a better value')
        eq(cf['Common']['OptionUpper'], 'A Better Value')
        eq(cf['random']['foolower'], 'value redefined')
        eq(cf['random']['FooUpper'], 'A Better Value Redefined')

    def test_case_sensitivity_conflicts(self):
        ini = textwrap.dedent("""
            [common]
            option = value
            Option = Value

            [Common]
            option = a better ${common:option}
            Option = A Better ${common:Option}

            [random]
            foo = ${common:option} redefined
            Foo = ${Common:Option} Redefined
        """).strip()
        with self.assertRaises(configparser.DuplicateOptionError):
            cf = self.fromstring(ini)

        # raw options
        cf = self.fromstring(ini, optionxform=lambda opt: opt)
        eq = self.assertEqual
        eq(cf['common']['option'], 'value')
        eq(cf['common']['Option'], 'Value')
        eq(cf['Common']['option'], 'a better value')
        eq(cf['Common']['Option'], 'A Better Value')
        eq(cf['random']['foo'], 'value redefined')
        eq(cf['random']['Foo'], 'A Better Value Redefined')

    def test_other_errors(self):
        cf = self.fromstring("""
            [interpolation fail]
            case1 = ${where's the brace
            case2 = ${does_not_exist}
            case3 = ${wrong_section:wrong_value}
            case4 = ${i:like:colon:characters}
            case5 = $100 for Fail No 5!
        """)

        with self.assertRaises(configparser.InterpolationSyntaxError):
            cf['interpolation fail']['case1']
        with self.assertRaises(configparser.InterpolationMissingOptionError):
            cf['interpolation fail']['case2']
        with self.assertRaises(configparser.InterpolationMissingOptionError):
            cf['interpolation fail']['case3']
        with self.assertRaises(configparser.InterpolationSyntaxError):
            cf['interpolation fail']['case4']
        with self.assertRaises(configparser.InterpolationSyntaxError):
            cf['interpolation fail']['case5']
        with self.assertRaises(ValueError):
            cf['interpolation fail']['case6'] = "BLACK $ABBATH"


class ConfigParserTestCaseNoValue(ConfigParserTestCase):
    allow_no_value = True

class ConfigParserTestCaseTrickyFile(CfgParserTestCaseClass):
    config_class = configparser.ConfigParser
    delimiters = {'='}
    comment_prefixes = {'#'}
    allow_no_value = True

    def test_cfgparser_dot_3(self):
        tricky = support.findfile("cfgparser.3")
        cf = self.newconfig()
        self.assertEqual(len(cf.read(tricky, encoding='utf-8')), 1)
        self.assertEqual(cf.sections(), ['strange',
                                         'corruption',
                                         'yeah, sections can be '
                                         'indented as well',
                                         'another one!',
                                         'no values here',
                                         'tricky interpolation',
                                         'more interpolation'])
        self.assertEqual(cf.getint(self.default_section, 'go',
                                   vars={'interpolate': '-1'}), -1)
        with self.assertRaises(ValueError):
            # no interpolation will happen
            cf.getint(self.default_section, 'go', raw=True,
                      vars={'interpolate': '-1'})
        self.assertEqual(len(cf.get('strange', 'other').split('\n')), 4)
        self.assertEqual(len(cf.get('corruption', 'value').split('\n')), 10)
        longname = 'yeah, sections can be indented as well'
        self.assertFalse(cf.getboolean(longname, 'are they subsections'))
        self.assertEqual(cf.get(longname, 'lets use some Unicode'), '片仮名')
        self.assertEqual(len(cf.items('another one!')), 5) # 4 in section and
                                                           # `go` from DEFAULT
        with self.assertRaises(configparser.InterpolationMissingOptionError):
            cf.items('no values here')
        self.assertEqual(cf.get('tricky interpolation', 'lets'), 'do this')
        self.assertEqual(cf.get('tricky interpolation', 'lets'),
                         cf.get('tricky interpolation', 'go'))
        self.assertEqual(cf.get('more interpolation', 'lets'), 'go shopping')

    def test_unicode_failure(self):
        tricky = support.findfile("cfgparser.3")
        cf = self.newconfig()
        with self.assertRaises(UnicodeDecodeError):
            cf.read(tricky, encoding='ascii')


class Issue7005TestCase(unittest.TestCase):
    """Test output when None is set() as a value and allow_no_value == False.

    http://bugs.python.org/issue7005

    """

    expected_output = "[section]\noption = None\n\n"

    def prepare(self, config_class):
        # This is the default, but that's the point.
        cp = config_class(allow_no_value=False)
        cp.add_section("section")
        cp.set("section", "option", None)
        sio = io.StringIO()
        cp.write(sio)
        return sio.getvalue()

    def test_none_as_value_stringified(self):
        cp = configparser.ConfigParser(allow_no_value=False)
        cp.add_section("section")
        with self.assertRaises(TypeError):
            cp.set("section", "option", None)

    def test_none_as_value_stringified_raw(self):
        output = self.prepare(configparser.RawConfigParser)
        self.assertEqual(output, self.expected_output)


class SortedTestCase(RawConfigParserTestCase):
    dict_type = SortedDict

    def test_sorted(self):
        cf = self.fromstring("[b]\n"
                             "o4=1\n"
                             "o3=2\n"
                             "o2=3\n"
                             "o1=4\n"
                             "[a]\n"
                             "k=v\n")
        output = io.StringIO()
        cf.write(output)
        self.assertEqual(output.getvalue(),
                         "[a]\n"
                         "k = v\n\n"
                         "[b]\n"
                         "o1 = 4\n"
                         "o2 = 3\n"
                         "o3 = 2\n"
                         "o4 = 1\n\n")


class CompatibleTestCase(CfgParserTestCaseClass):
    config_class = configparser.RawConfigParser
    comment_prefixes = '#;'
    inline_comment_prefixes = ';'

    def test_comment_handling(self):
        config_string = textwrap.dedent("""\
        [Commented Bar]
        baz=qwe ; a comment
        foo: bar # not a comment!
        # but this is a comment
        ; another comment
        quirk: this;is not a comment
        ; a space must precede an inline comment
        """)
        cf = self.fromstring(config_string)
        self.assertEqual(cf.get('Commented Bar', 'foo'),
                         'bar # not a comment!')
        self.assertEqual(cf.get('Commented Bar', 'baz'), 'qwe')
        self.assertEqual(cf.get('Commented Bar', 'quirk'),
                         'this;is not a comment')

class CopyTestCase(BasicTestCase):
    config_class = configparser.ConfigParser

    def fromstring(self, string, defaults=None):
        cf = self.newconfig(defaults)
        cf.read_string(string)
        cf_copy = self.newconfig()
        cf_copy.read_dict(cf)
        # we have to clean up option duplicates that appeared because of
        # the magic DEFAULTSECT behaviour.
        for section in cf_copy.values():
            if section.name == self.default_section:
                continue
            for default, value in cf[self.default_section].items():
                if section[default] == value:
                    del section[default]
        return cf_copy


class FakeFile:
    def __init__(self):
        file_path = support.findfile("cfgparser.1")
        with open(file_path) as f:
            self.lines = f.readlines()
            self.lines.reverse()

    def readline(self):
        if len(self.lines):
            return self.lines.pop()
        return ''


def readline_generator(f):
    """As advised in Doc/library/configparser.rst."""
    line = f.readline()
    while line:
        yield line
        line = f.readline()


class ReadFileTestCase(unittest.TestCase):
    def test_file(self):
        file_path = support.findfile("cfgparser.1")
        parser = configparser.ConfigParser()
        with open(file_path) as f:
            parser.read_file(f)
        self.assertIn("Foo Bar", parser)
        self.assertIn("foo", parser["Foo Bar"])
        self.assertEqual(parser["Foo Bar"]["foo"], "newbar")

    def test_iterable(self):
        lines = textwrap.dedent("""
        [Foo Bar]
        foo=newbar""").strip().split('\n')
        parser = configparser.ConfigParser()
        parser.read_file(lines)
        self.assertIn("Foo Bar", parser)
        self.assertIn("foo", parser["Foo Bar"])
        self.assertEqual(parser["Foo Bar"]["foo"], "newbar")

    def test_readline_generator(self):
        """Issue #11670."""
        parser = configparser.ConfigParser()
        with self.assertRaises(TypeError):
            parser.read_file(FakeFile())
        parser.read_file(readline_generator(FakeFile()))
        self.assertIn("Foo Bar", parser)
        self.assertIn("foo", parser["Foo Bar"])
        self.assertEqual(parser["Foo Bar"]["foo"], "newbar")


class CoverageOneHundredTestCase(unittest.TestCase):
    """Covers edge cases in the codebase."""

    def test_duplicate_option_error(self):
        error = configparser.DuplicateOptionError('section', 'option')
        self.assertEqual(error.section, 'section')
        self.assertEqual(error.option, 'option')
        self.assertEqual(error.source, None)
        self.assertEqual(error.lineno, None)
        self.assertEqual(error.args, ('section', 'option', None, None))
        self.assertEqual(str(error), "Option 'option' in section 'section' "
                                     "already exists")

    def test_interpolation_depth_error(self):
        error = configparser.InterpolationDepthError('option', 'section',
                                                     'rawval')
        self.assertEqual(error.args, ('option', 'section', 'rawval'))
        self.assertEqual(error.option, 'option')
        self.assertEqual(error.section, 'section')

    def test_parsing_error(self):
        with self.assertRaises(ValueError) as cm:
            configparser.ParsingError()
        self.assertEqual(str(cm.exception), "Required argument `source' not "
                                            "given.")
        with self.assertRaises(ValueError) as cm:
            configparser.ParsingError(source='source', filename='filename')
        self.assertEqual(str(cm.exception), "Cannot specify both `filename' "
                                            "and `source'. Use `source'.")
        error = configparser.ParsingError(filename='source')
        self.assertEqual(error.source, 'source')
        with warnings.catch_warnings(record=True) as w:
            warnings.simplefilter("always", DeprecationWarning)
            self.assertEqual(error.filename, 'source')
            error.filename = 'filename'
            self.assertEqual(error.source, 'filename')
        for warning in w:
            self.assertTrue(warning.category is DeprecationWarning)

    def test_interpolation_validation(self):
        parser = configparser.ConfigParser()
        parser.read_string("""
            [section]
            invalid_percent = %
            invalid_reference = %(()
            invalid_variable = %(does_not_exist)s
        """)
        with self.assertRaises(configparser.InterpolationSyntaxError) as cm:
            parser['section']['invalid_percent']
        self.assertEqual(str(cm.exception), "'%' must be followed by '%' or "
                                            "'(', found: '%'")
        with self.assertRaises(configparser.InterpolationSyntaxError) as cm:
            parser['section']['invalid_reference']
        self.assertEqual(str(cm.exception), "bad interpolation variable "
                                            "reference '%(()'")

    def test_readfp_deprecation(self):
        sio = io.StringIO("""
        [section]
        option = value
        """)
        parser = configparser.ConfigParser()
        with warnings.catch_warnings(record=True) as w:
            warnings.simplefilter("always", DeprecationWarning)
            parser.readfp(sio, filename='StringIO')
        for warning in w:
            self.assertTrue(warning.category is DeprecationWarning)
        self.assertEqual(len(parser), 2)
        self.assertEqual(parser['section']['option'], 'value')

    def test_safeconfigparser_deprecation(self):
        with warnings.catch_warnings(record=True) as w:
            warnings.simplefilter("always", DeprecationWarning)
            parser = configparser.SafeConfigParser()
        for warning in w:
            self.assertTrue(warning.category is DeprecationWarning)

    def test_sectionproxy_repr(self):
        parser = configparser.ConfigParser()
        parser.read_string("""
            [section]
            key = value
        """)
        self.assertEqual(repr(parser['section']), '<Section: section>')


class ExceptionPicklingTestCase(unittest.TestCase):
    """Tests for issue #13760: ConfigParser exceptions are not picklable."""

    def test_error(self):
        import pickle
        e1 = configparser.Error('value')
        pickled = pickle.dumps(e1)
        e2 = pickle.loads(pickled)
        self.assertEqual(e1.message, e2.message)
        self.assertEqual(repr(e1), repr(e2))

    def test_nosectionerror(self):
        import pickle
        e1 = configparser.NoSectionError('section')
        pickled = pickle.dumps(e1)
        e2 = pickle.loads(pickled)
        self.assertEqual(e1.message, e2.message)
        self.assertEqual(e1.args, e2.args)
        self.assertEqual(e1.section, e2.section)
        self.assertEqual(repr(e1), repr(e2))

    def test_nooptionerror(self):
        import pickle
        e1 = configparser.NoOptionError('option', 'section')
        pickled = pickle.dumps(e1)
        e2 = pickle.loads(pickled)
        self.assertEqual(e1.message, e2.message)
        self.assertEqual(e1.args, e2.args)
        self.assertEqual(e1.section, e2.section)
        self.assertEqual(e1.option, e2.option)
        self.assertEqual(repr(e1), repr(e2))

    def test_duplicatesectionerror(self):
        import pickle
        e1 = configparser.DuplicateSectionError('section', 'source', 123)
        pickled = pickle.dumps(e1)
        e2 = pickle.loads(pickled)
        self.assertEqual(e1.message, e2.message)
        self.assertEqual(e1.args, e2.args)
        self.assertEqual(e1.section, e2.section)
        self.assertEqual(e1.source, e2.source)
        self.assertEqual(e1.lineno, e2.lineno)
        self.assertEqual(repr(e1), repr(e2))

    def test_duplicateoptionerror(self):
        import pickle
        e1 = configparser.DuplicateOptionError('section', 'option', 'source',
            123)
        pickled = pickle.dumps(e1)
        e2 = pickle.loads(pickled)
        self.assertEqual(e1.message, e2.message)
        self.assertEqual(e1.args, e2.args)
        self.assertEqual(e1.section, e2.section)
        self.assertEqual(e1.option, e2.option)
        self.assertEqual(e1.source, e2.source)
        self.assertEqual(e1.lineno, e2.lineno)
        self.assertEqual(repr(e1), repr(e2))

    def test_interpolationerror(self):
        import pickle
        e1 = configparser.InterpolationError('option', 'section', 'msg')
        pickled = pickle.dumps(e1)
        e2 = pickle.loads(pickled)
        self.assertEqual(e1.message, e2.message)
        self.assertEqual(e1.args, e2.args)
        self.assertEqual(e1.section, e2.section)
        self.assertEqual(e1.option, e2.option)
        self.assertEqual(repr(e1), repr(e2))

    def test_interpolationmissingoptionerror(self):
        import pickle
        e1 = configparser.InterpolationMissingOptionError('option', 'section',
            'rawval', 'reference')
        pickled = pickle.dumps(e1)
        e2 = pickle.loads(pickled)
        self.assertEqual(e1.message, e2.message)
        self.assertEqual(e1.args, e2.args)
        self.assertEqual(e1.section, e2.section)
        self.assertEqual(e1.option, e2.option)
        self.assertEqual(e1.reference, e2.reference)
        self.assertEqual(repr(e1), repr(e2))

    def test_interpolationsyntaxerror(self):
        import pickle
        e1 = configparser.InterpolationSyntaxError('option', 'section', 'msg')
        pickled = pickle.dumps(e1)
        e2 = pickle.loads(pickled)
        self.assertEqual(e1.message, e2.message)
        self.assertEqual(e1.args, e2.args)
        self.assertEqual(e1.section, e2.section)
        self.assertEqual(e1.option, e2.option)
        self.assertEqual(repr(e1), repr(e2))

    def test_interpolationdeptherror(self):
        import pickle
        e1 = configparser.InterpolationDepthError('option', 'section',
            'rawval')
        pickled = pickle.dumps(e1)
        e2 = pickle.loads(pickled)
        self.assertEqual(e1.message, e2.message)
        self.assertEqual(e1.args, e2.args)
        self.assertEqual(e1.section, e2.section)
        self.assertEqual(e1.option, e2.option)
        self.assertEqual(repr(e1), repr(e2))

    def test_parsingerror(self):
        import pickle
        e1 = configparser.ParsingError('source')
        e1.append(1, 'line1')
        e1.append(2, 'line2')
        e1.append(3, 'line3')
        pickled = pickle.dumps(e1)
        e2 = pickle.loads(pickled)
        self.assertEqual(e1.message, e2.message)
        self.assertEqual(e1.args, e2.args)
        self.assertEqual(e1.source, e2.source)
        self.assertEqual(e1.errors, e2.errors)
        self.assertEqual(repr(e1), repr(e2))
        e1 = configparser.ParsingError(filename='filename')
        e1.append(1, 'line1')
        e1.append(2, 'line2')
        e1.append(3, 'line3')
        pickled = pickle.dumps(e1)
        e2 = pickle.loads(pickled)
        self.assertEqual(e1.message, e2.message)
        self.assertEqual(e1.args, e2.args)
        self.assertEqual(e1.source, e2.source)
        self.assertEqual(e1.errors, e2.errors)
        self.assertEqual(repr(e1), repr(e2))

    def test_missingsectionheadererror(self):
        import pickle
        e1 = configparser.MissingSectionHeaderError('filename', 123, 'line')
        pickled = pickle.dumps(e1)
        e2 = pickle.loads(pickled)
        self.assertEqual(e1.message, e2.message)
        self.assertEqual(e1.args, e2.args)
        self.assertEqual(e1.line, e2.line)
        self.assertEqual(e1.source, e2.source)
        self.assertEqual(e1.lineno, e2.lineno)
        self.assertEqual(repr(e1), repr(e2))


class InlineCommentStrippingTestCase(unittest.TestCase):
    """Tests for issue #14590: ConfigParser doesn't strip inline comment when
    delimiter occurs earlier without preceding space.."""

    def test_stripping(self):
        cfg = configparser.ConfigParser(inline_comment_prefixes=(';', '#',
                '//'))
        cfg.read_string("""
        [section]
        k1 = v1;still v1
        k2 = v2 ;a comment
        k3 = v3 ; also a comment
        k4 = v4;still v4 ;a comment
        k5 = v5;still v5 ; also a comment
        k6 = v6;still v6; and still v6 ;a comment
        k7 = v7;still v7; and still v7 ; also a comment

        [multiprefix]
        k1 = v1;still v1 #a comment ; yeah, pretty much
        k2 = v2 // this already is a comment ; continued
        k3 = v3;#//still v3# and still v3 ; a comment
        """)
        s = cfg['section']
        self.assertEqual(s['k1'], 'v1;still v1')
        self.assertEqual(s['k2'], 'v2')
        self.assertEqual(s['k3'], 'v3')
        self.assertEqual(s['k4'], 'v4;still v4')
        self.assertEqual(s['k5'], 'v5;still v5')
        self.assertEqual(s['k6'], 'v6;still v6; and still v6')
        self.assertEqual(s['k7'], 'v7;still v7; and still v7')
        s = cfg['multiprefix']
        self.assertEqual(s['k1'], 'v1;still v1')
        self.assertEqual(s['k2'], 'v2')
        self.assertEqual(s['k3'], 'v3;#//still v3# and still v3')


def test_main():
    support.run_unittest(
        ConfigParserTestCase,
        ConfigParserTestCaseNonStandardDelimiters,
        ConfigParserTestCaseNoValue,
        ConfigParserTestCaseExtendedInterpolation,
        ConfigParserTestCaseLegacyInterpolation,
        ConfigParserTestCaseNoInterpolation,
        ConfigParserTestCaseTrickyFile,
        MultilineValuesTestCase,
        RawConfigParserTestCase,
        RawConfigParserTestCaseNonStandardDelimiters,
        RawConfigParserTestSambaConf,
        SortedTestCase,
        Issue7005TestCase,
        StrictTestCase,
        CompatibleTestCase,
        CopyTestCase,
        ConfigParserTestCaseNonStandardDefaultSection,
        ReadFileTestCase,
        CoverageOneHundredTestCase,
        ExceptionPicklingTestCase,
        InlineCommentStrippingTestCase,
        )
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