Lib/test/test_urllib.py

"""Regresssion tests for urllib"""

import urllib.parse
import urllib.request
import http.client
import email.message
import io
import unittest
from test import support
import os
import tempfile

def hexescape(char):
    """Escape char as RFC 2396 specifies"""
    hex_repr = hex(ord(char))[2:].upper()
    if len(hex_repr) == 1:
        hex_repr = "0%s" % hex_repr
    return "%" + hex_repr

# Shortcut for testing FancyURLopener
_urlopener = None
def urlopen(url, data=None, proxies=None):
    """urlopen(url [, data]) -> open file-like object"""
    global _urlopener
    if proxies is not None:
        opener = urllib.request.FancyURLopener(proxies=proxies)
    elif not _urlopener:
        opener = urllib.request.FancyURLopener()
        _urlopener = opener
    else:
        opener = _urlopener
    if data is None:
        return opener.open(url)
    else:
        return opener.open(url, data)

class urlopen_FileTests(unittest.TestCase):
    """Test urlopen() opening a temporary file.

    Try to test as much functionality as possible so as to cut down on reliance
    on connecting to the Net for testing.

    """

    def setUp(self):
        # Create a temp file to use for testing
        self.text = bytes("test_urllib: %s\n" % self.__class__.__name__,
                          "ascii")
        f = open(support.TESTFN, 'wb')
        try:
            f.write(self.text)
        finally:
            f.close()
        self.pathname = support.TESTFN
        self.returned_obj = urlopen("file:%s" % self.pathname)

    def tearDown(self):
        """Shut down the open object"""
        self.returned_obj.close()
        os.remove(support.TESTFN)

    def test_interface(self):
        # Make sure object returned by urlopen() has the specified methods
        for attr in ("read", "readline", "readlines", "fileno",
                     "close", "info", "geturl", "getcode", "__iter__"):
            self.assertTrue(hasattr(self.returned_obj, attr),
                         "object returned by urlopen() lacks %s attribute" %
                         attr)

    def test_read(self):
        self.assertEqual(self.text, self.returned_obj.read())

    def test_readline(self):
        self.assertEqual(self.text, self.returned_obj.readline())
        self.assertEqual(b'', self.returned_obj.readline(),
                         "calling readline() after exhausting the file did not"
                         " return an empty string")

    def test_readlines(self):
        lines_list = self.returned_obj.readlines()
        self.assertEqual(len(lines_list), 1,
                         "readlines() returned the wrong number of lines")
        self.assertEqual(lines_list[0], self.text,
                         "readlines() returned improper text")

    def test_fileno(self):
        file_num = self.returned_obj.fileno()
        self.assertIsInstance(file_num, int, "fileno() did not return an int")
        self.assertEqual(os.read(file_num, len(self.text)), self.text,
                         "Reading on the file descriptor returned by fileno() "
                         "did not return the expected text")

    def test_close(self):
        # Test close() by calling it hear and then having it be called again
        # by the tearDown() method for the test
        self.returned_obj.close()

    def test_info(self):
        self.assertIsInstance(self.returned_obj.info(), email.message.Message)

    def test_geturl(self):
        self.assertEqual(self.returned_obj.geturl(), self.pathname)

    def test_getcode(self):
        self.assertEqual(self.returned_obj.getcode(), None)

    def test_iter(self):
        # Test iterator
        # Don't need to count number of iterations since test would fail the
        # instant it returned anything beyond the first line from the
        # comparison
        for line in self.returned_obj.__iter__():
            self.assertEqual(line, self.text)

class ProxyTests(unittest.TestCase):

    def setUp(self):
        # Records changes to env vars
        self.env = support.EnvironmentVarGuard()
        # Delete all proxy related env vars
        for k in os.environ.keys():
            if 'proxy' in k.lower():
                self.env.unset(k)

    def tearDown(self):
        # Restore all proxy related env vars
        self.env.__exit__()
        del self.env

    def test_getproxies_environment_keep_no_proxies(self):
        self.env.set('NO_PROXY', 'localhost')
        proxies = urllib.request.getproxies_environment()
        # getproxies_environment use lowered case truncated (no '_proxy') keys
        self.assertEquals('localhost', proxies['no'])


class urlopen_HttpTests(unittest.TestCase):
    """Test urlopen() opening a fake http connection."""

    def fakehttp(self, fakedata):
        class FakeSocket(io.BytesIO):
            def sendall(self, str): pass
            def makefile(self, *args, **kwds):
                return self
            def read(self, amt=None):
                if self.closed: return b""
                return io.BytesIO.read(self, amt)
            def readline(self, length=None):
                if self.closed: return b""
                return io.BytesIO.readline(self, length)
        class FakeHTTPConnection(http.client.HTTPConnection):
            def connect(self):
                self.sock = FakeSocket(fakedata)
        self._connection_class = http.client.HTTPConnection
        http.client.HTTPConnection = FakeHTTPConnection

    def unfakehttp(self):
        http.client.HTTPConnection = self._connection_class

    def test_read(self):
        self.fakehttp(b"Hello!")
        try:
            fp = urlopen("http://python.org/")
            self.assertEqual(fp.readline(), b"Hello!")
            self.assertEqual(fp.readline(), b"")
            self.assertEqual(fp.geturl(), 'http://python.org/')
            self.assertEqual(fp.getcode(), 200)
        finally:
            self.unfakehttp()

    def test_read_bogus(self):
        # urlopen() should raise IOError for many error codes.
        self.fakehttp(b'''HTTP/1.1 401 Authentication Required
Date: Wed, 02 Jan 2008 03:03:54 GMT
Server: Apache/1.3.33 (Debian GNU/Linux) mod_ssl/2.8.22 OpenSSL/0.9.7e
Connection: close
Content-Type: text/html; charset=iso-8859-1
''')
        try:
            self.assertRaises(IOError, urlopen, "http://python.org/")
        finally:
            self.unfakehttp()

    def test_empty_socket(self):
        # urlopen() raises IOError if the underlying socket does not send any
        # data. (#1680230)
        self.fakehttp(b'')
        try:
            self.assertRaises(IOError, urlopen, "http://something")
        finally:
            self.unfakehttp()

class urlretrieve_FileTests(unittest.TestCase):
    """Test urllib.urlretrieve() on local files"""

    def setUp(self):
        # Create a list of temporary files. Each item in the list is a file
        # name (absolute path or relative to the current working directory).
        # All files in this list will be deleted in the tearDown method. Note,
        # this only helps to makes sure temporary files get deleted, but it
        # does nothing about trying to close files that may still be open. It
        # is the responsibility of the developer to properly close files even
        # when exceptional conditions occur.
        self.tempFiles = []

        # Create a temporary file.
        self.registerFileForCleanUp(support.TESTFN)
        self.text = b'testing urllib.urlretrieve'
        try:
            FILE = open(support.TESTFN, 'wb')
            FILE.write(self.text)
            FILE.close()
        finally:
            try: FILE.close()
            except: pass

    def tearDown(self):
        # Delete the temporary files.
        for each in self.tempFiles:
            try: os.remove(each)
            except: pass

    def constructLocalFileUrl(self, filePath):
        return "file://%s" % urllib.request.pathname2url(
            os.path.abspath(filePath))

    def createNewTempFile(self, data=b""):
        """Creates a new temporary file containing the specified data,
        registers the file for deletion during the test fixture tear down, and
        returns the absolute path of the file."""

        newFd, newFilePath = tempfile.mkstemp()
        try:
            self.registerFileForCleanUp(newFilePath)
            newFile = os.fdopen(newFd, "wb")
            newFile.write(data)
            newFile.close()
        finally:
            try: newFile.close()
            except: pass
        return newFilePath

    def registerFileForCleanUp(self, fileName):
        self.tempFiles.append(fileName)

    def test_basic(self):
        # Make sure that a local file just gets its own location returned and
        # a headers value is returned.
        result = urllib.request.urlretrieve("file:%s" % support.TESTFN)
        self.assertEqual(result[0], support.TESTFN)
        self.assertIsInstance(result[1], email.message.Message,
                              "did not get a email.message.Message instance "
                              "as second returned value")

    def test_copy(self):
        # Test that setting the filename argument works.
        second_temp = "%s.2" % support.TESTFN
        self.registerFileForCleanUp(second_temp)
        result = urllib.request.urlretrieve(self.constructLocalFileUrl(
            support.TESTFN), second_temp)
        self.assertEqual(second_temp, result[0])
        self.assertTrue(os.path.exists(second_temp), "copy of the file was not "
                                                  "made")
        FILE = open(second_temp, 'rb')
        try:
            text = FILE.read()
            FILE.close()
        finally:
            try: FILE.close()
            except: pass
        self.assertEqual(self.text, text)

    def test_reporthook(self):
        # Make sure that the reporthook works.
        def hooktester(count, block_size, total_size, count_holder=[0]):
            self.assertIsInstance(count, int)
            self.assertIsInstance(block_size, int)
            self.assertIsInstance(total_size, int)
            self.assertEqual(count, count_holder[0])
            count_holder[0] = count_holder[0] + 1
        second_temp = "%s.2" % support.TESTFN
        self.registerFileForCleanUp(second_temp)
        urllib.request.urlretrieve(
            self.constructLocalFileUrl(support.TESTFN),
            second_temp, hooktester)

    def test_reporthook_0_bytes(self):
        # Test on zero length file. Should call reporthook only 1 time.
        report = []
        def hooktester(count, block_size, total_size, _report=report):
            _report.append((count, block_size, total_size))
        srcFileName = self.createNewTempFile()
        urllib.request.urlretrieve(self.constructLocalFileUrl(srcFileName),
            support.TESTFN, hooktester)
        self.assertEqual(len(report), 1)
        self.assertEqual(report[0][2], 0)

    def test_reporthook_5_bytes(self):
        # Test on 5 byte file. Should call reporthook only 2 times (once when
        # the "network connection" is established and once when the block is
        # read). Since the block size is 8192 bytes, only one block read is
        # required to read the entire file.
        report = []
        def hooktester(count, block_size, total_size, _report=report):
            _report.append((count, block_size, total_size))
        srcFileName = self.createNewTempFile(b"x" * 5)
        urllib.request.urlretrieve(self.constructLocalFileUrl(srcFileName),
            support.TESTFN, hooktester)
        self.assertEqual(len(report), 2)
        self.assertEqual(report[0][1], 8192)
        self.assertEqual(report[0][2], 5)

    def test_reporthook_8193_bytes(self):
        # Test on 8193 byte file. Should call reporthook only 3 times (once
        # when the "network connection" is established, once for the next 8192
        # bytes, and once for the last byte).
        report = []
        def hooktester(count, block_size, total_size, _report=report):
            _report.append((count, block_size, total_size))
        srcFileName = self.createNewTempFile(b"x" * 8193)
        urllib.request.urlretrieve(self.constructLocalFileUrl(srcFileName),
            support.TESTFN, hooktester)
        self.assertEqual(len(report), 3)
        self.assertEqual(report[0][1], 8192)
        self.assertEqual(report[0][2], 8193)

class QuotingTests(unittest.TestCase):
    """Tests for urllib.quote() and urllib.quote_plus()

    According to RFC 2396 (Uniform Resource Identifiers), to escape a
    character you write it as '%' + <2 character US-ASCII hex value>.
    The Python code of ``'%' + hex(ord(<character>))[2:]`` escapes a
    character properly. Case does not matter on the hex letters.

    The various character sets specified are:

    Reserved characters : ";/?:@&=+$,"
        Have special meaning in URIs and must be escaped if not being used for
        their special meaning
    Data characters : letters, digits, and "-_.!~*'()"
        Unreserved and do not need to be escaped; can be, though, if desired
    Control characters : 0x00 - 0x1F, 0x7F
        Have no use in URIs so must be escaped
    space : 0x20
        Must be escaped
    Delimiters : '<>#%"'
        Must be escaped
    Unwise : "{}|\^[]`"
        Must be escaped

    """

    def test_never_quote(self):
        # Make sure quote() does not quote letters, digits, and "_,.-"
        do_not_quote = '' .join(["ABCDEFGHIJKLMNOPQRSTUVWXYZ",
                                 "abcdefghijklmnopqrstuvwxyz",
                                 "0123456789",
                                 "_.-"])
        result = urllib.parse.quote(do_not_quote)
        self.assertEqual(do_not_quote, result,
                         "using quote(): %r != %r" % (do_not_quote, result))
        result = urllib.parse.quote_plus(do_not_quote)
        self.assertEqual(do_not_quote, result,
                        "using quote_plus(): %r != %r" % (do_not_quote, result))

    def test_default_safe(self):
        # Test '/' is default value for 'safe' parameter
        self.assertEqual(urllib.parse.quote.__defaults__[0], '/')

    def test_safe(self):
        # Test setting 'safe' parameter does what it should do
        quote_by_default = "<>"
        result = urllib.parse.quote(quote_by_default, safe=quote_by_default)
        self.assertEqual(quote_by_default, result,
                         "using quote(): %r != %r" % (quote_by_default, result))
        result = urllib.parse.quote_plus(quote_by_default,
                                         safe=quote_by_default)
        self.assertEqual(quote_by_default, result,
                         "using quote_plus(): %r != %r" %
                         (quote_by_default, result))
        # Safe expressed as bytes rather than str
        result = urllib.parse.quote(quote_by_default, safe=b"<>")
        self.assertEqual(quote_by_default, result,
                         "using quote(): %r != %r" % (quote_by_default, result))
        # "Safe" non-ASCII characters should have no effect
        # (Since URIs are not allowed to have non-ASCII characters)
        result = urllib.parse.quote("a\xfcb", encoding="latin-1", safe="\xfc")
        expect = urllib.parse.quote("a\xfcb", encoding="latin-1", safe="")
        self.assertEqual(expect, result,
                         "using quote(): %r != %r" %
                         (expect, result))
        # Same as above, but using a bytes rather than str
        result = urllib.parse.quote("a\xfcb", encoding="latin-1", safe=b"\xfc")
        expect = urllib.parse.quote("a\xfcb", encoding="latin-1", safe="")
        self.assertEqual(expect, result,
                         "using quote(): %r != %r" %
                         (expect, result))

    def test_default_quoting(self):
        # Make sure all characters that should be quoted are by default sans
        # space (separate test for that).
        should_quote = [chr(num) for num in range(32)] # For 0x00 - 0x1F
        should_quote.append('<>#%"{}|\^[]`')
        should_quote.append(chr(127)) # For 0x7F
        should_quote = ''.join(should_quote)
        for char in should_quote:
            result = urllib.parse.quote(char)
            self.assertEqual(hexescape(char), result,
                             "using quote(): "
                             "%s should be escaped to %s, not %s" %
                             (char, hexescape(char), result))
            result = urllib.parse.quote_plus(char)
            self.assertEqual(hexescape(char), result,
                             "using quote_plus(): "
                             "%s should be escapes to %s, not %s" %
                             (char, hexescape(char), result))
        del should_quote
        partial_quote = "ab[]cd"
        expected = "ab%5B%5Dcd"
        result = urllib.parse.quote(partial_quote)
        self.assertEqual(expected, result,
                         "using quote(): %r != %r" % (expected, result))
        self.assertEqual(expected, result,
                         "using quote_plus(): %r != %r" % (expected, result))

    def test_quoting_space(self):
        # Make sure quote() and quote_plus() handle spaces as specified in
        # their unique way
        result = urllib.parse.quote(' ')
        self.assertEqual(result, hexescape(' '),
                         "using quote(): %r != %r" % (result, hexescape(' ')))
        result = urllib.parse.quote_plus(' ')
        self.assertEqual(result, '+',
                         "using quote_plus(): %r != +" % result)
        given = "a b cd e f"
        expect = given.replace(' ', hexescape(' '))
        result = urllib.parse.quote(given)
        self.assertEqual(expect, result,
                         "using quote(): %r != %r" % (expect, result))
        expect = given.replace(' ', '+')
        result = urllib.parse.quote_plus(given)
        self.assertEqual(expect, result,
                         "using quote_plus(): %r != %r" % (expect, result))

    def test_quoting_plus(self):
        self.assertEqual(urllib.parse.quote_plus('alpha+beta gamma'),
                         'alpha%2Bbeta+gamma')
        self.assertEqual(urllib.parse.quote_plus('alpha+beta gamma', '+'),
                         'alpha+beta+gamma')
        # Test with bytes
        self.assertEqual(urllib.parse.quote_plus(b'alpha+beta gamma'),
                         'alpha%2Bbeta+gamma')
        # Test with safe bytes
        self.assertEqual(urllib.parse.quote_plus('alpha+beta gamma', b'+'),
                         'alpha+beta+gamma')

    def test_quote_bytes(self):
        # Bytes should quote directly to percent-encoded values
        given = b"\xa2\xd8ab\xff"
        expect = "%A2%D8ab%FF"
        result = urllib.parse.quote(given)
        self.assertEqual(expect, result,
                         "using quote(): %r != %r" % (expect, result))
        # Encoding argument should raise type error on bytes input
        self.assertRaises(TypeError, urllib.parse.quote, given,
                            encoding="latin-1")
        # quote_from_bytes should work the same
        result = urllib.parse.quote_from_bytes(given)
        self.assertEqual(expect, result,
                         "using quote_from_bytes(): %r != %r"
                         % (expect, result))

    def test_quote_with_unicode(self):
        # Characters in Latin-1 range, encoded by default in UTF-8
        given = "\xa2\xd8ab\xff"
        expect = "%C2%A2%C3%98ab%C3%BF"
        result = urllib.parse.quote(given)
        self.assertEqual(expect, result,
                         "using quote(): %r != %r" % (expect, result))
        # Characters in Latin-1 range, encoded by with None (default)
        result = urllib.parse.quote(given, encoding=None, errors=None)
        self.assertEqual(expect, result,
                         "using quote(): %r != %r" % (expect, result))
        # Characters in Latin-1 range, encoded with Latin-1
        given = "\xa2\xd8ab\xff"
        expect = "%A2%D8ab%FF"
        result = urllib.parse.quote(given, encoding="latin-1")
        self.assertEqual(expect, result,
                         "using quote(): %r != %r" % (expect, result))
        # Characters in BMP, encoded by default in UTF-8
        given = "\u6f22\u5b57"              # "Kanji"
        expect = "%E6%BC%A2%E5%AD%97"
        result = urllib.parse.quote(given)
        self.assertEqual(expect, result,
                         "using quote(): %r != %r" % (expect, result))
        # Characters in BMP, encoded with Latin-1
        given = "\u6f22\u5b57"
        self.assertRaises(UnicodeEncodeError, urllib.parse.quote, given,
                                    encoding="latin-1")
        # Characters in BMP, encoded with Latin-1, with replace error handling
        given = "\u6f22\u5b57"
        expect = "%3F%3F"                   # "??"
        result = urllib.parse.quote(given, encoding="latin-1",
                                    errors="replace")
        self.assertEqual(expect, result,
                         "using quote(): %r != %r" % (expect, result))
        # Characters in BMP, Latin-1, with xmlcharref error handling
        given = "\u6f22\u5b57"
        expect = "%26%2328450%3B%26%2323383%3B"     # "&#28450;&#23383;"
        result = urllib.parse.quote(given, encoding="latin-1",
                                    errors="xmlcharrefreplace")
        self.assertEqual(expect, result,
                         "using quote(): %r != %r" % (expect, result))

    def test_quote_plus_with_unicode(self):
        # Encoding (latin-1) test for quote_plus
        given = "\xa2\xd8 \xff"
        expect = "%A2%D8+%FF"
        result = urllib.parse.quote_plus(given, encoding="latin-1")
        self.assertEqual(expect, result,
                         "using quote_plus(): %r != %r" % (expect, result))
        # Errors test for quote_plus
        given = "ab\u6f22\u5b57 cd"
        expect = "ab%3F%3F+cd"
        result = urllib.parse.quote_plus(given, encoding="latin-1",
                                         errors="replace")
        self.assertEqual(expect, result,
                         "using quote_plus(): %r != %r" % (expect, result))

class UnquotingTests(unittest.TestCase):
    """Tests for unquote() and unquote_plus()

    See the doc string for quoting_Tests for details on quoting and such.

    """

    def test_unquoting(self):
        # Make sure unquoting of all ASCII values works
        escape_list = []
        for num in range(128):
            given = hexescape(chr(num))
            expect = chr(num)
            result = urllib.parse.unquote(given)
            self.assertEqual(expect, result,
                             "using unquote(): %r != %r" % (expect, result))
            result = urllib.parse.unquote_plus(given)
            self.assertEqual(expect, result,
                             "using unquote_plus(): %r != %r" %
                             (expect, result))
            escape_list.append(given)
        escape_string = ''.join(escape_list)
        del escape_list
        result = urllib.parse.unquote(escape_string)
        self.assertEqual(result.count('%'), 1,
                         "using unquote(): not all characters escaped: "
                         "%s" % result)

    def test_unquoting_badpercent(self):
        # Test unquoting on bad percent-escapes
        given = '%xab'
        expect = given
        result = urllib.parse.unquote(given)
        self.assertEqual(expect, result, "using unquote(): %r != %r"
                         % (expect, result))
        given = '%x'
        expect = given
        result = urllib.parse.unquote(given)
        self.assertEqual(expect, result, "using unquote(): %r != %r"
                         % (expect, result))
        given = '%'
        expect = given
        result = urllib.parse.unquote(given)
        self.assertEqual(expect, result, "using unquote(): %r != %r"
                         % (expect, result))
        # unquote_to_bytes
        given = '%xab'
        expect = bytes(given, 'ascii')
        result = urllib.parse.unquote_to_bytes(given)
        self.assertEqual(expect, result, "using unquote_to_bytes(): %r != %r"
                         % (expect, result))
        given = '%x'
        expect = bytes(given, 'ascii')
        result = urllib.parse.unquote_to_bytes(given)
        self.assertEqual(expect, result, "using unquote_to_bytes(): %r != %r"
                         % (expect, result))
        given = '%'
        expect = bytes(given, 'ascii')
        result = urllib.parse.unquote_to_bytes(given)
        self.assertEqual(expect, result, "using unquote_to_bytes(): %r != %r"
                         % (expect, result))

    def test_unquoting_mixed_case(self):
        # Test unquoting on mixed-case hex digits in the percent-escapes
        given = '%Ab%eA'
        expect = b'\xab\xea'
        result = urllib.parse.unquote_to_bytes(given)
        self.assertEqual(expect, result,
                         "using unquote_to_bytes(): %r != %r"
                         % (expect, result))

    def test_unquoting_parts(self):
        # Make sure unquoting works when have non-quoted characters
        # interspersed
        given = 'ab%sd' % hexescape('c')
        expect = "abcd"
        result = urllib.parse.unquote(given)
        self.assertEqual(expect, result,
                         "using quote(): %r != %r" % (expect, result))
        result = urllib.parse.unquote_plus(given)
        self.assertEqual(expect, result,
                         "using unquote_plus(): %r != %r" % (expect, result))

    def test_unquoting_plus(self):
        # Test difference between unquote() and unquote_plus()
        given = "are+there+spaces..."
        expect = given
        result = urllib.parse.unquote(given)
        self.assertEqual(expect, result,
                         "using unquote(): %r != %r" % (expect, result))
        expect = given.replace('+', ' ')
        result = urllib.parse.unquote_plus(given)
        self.assertEqual(expect, result,
                         "using unquote_plus(): %r != %r" % (expect, result))

    def test_unquote_to_bytes(self):
        given = 'br%C3%BCckner_sapporo_20050930.doc'
        expect = b'br\xc3\xbcckner_sapporo_20050930.doc'
        result = urllib.parse.unquote_to_bytes(given)
        self.assertEqual(expect, result,
                         "using unquote_to_bytes(): %r != %r"
                         % (expect, result))
        # Test on a string with unescaped non-ASCII characters
        # (Technically an invalid URI; expect those characters to be UTF-8
        # encoded).
        result = urllib.parse.unquote_to_bytes("\u6f22%C3%BC")
        expect = b'\xe6\xbc\xa2\xc3\xbc'    # UTF-8 for "\u6f22\u00fc"
        self.assertEqual(expect, result,
                         "using unquote_to_bytes(): %r != %r"
                         % (expect, result))
        # Test with a bytes as input
        given = b'%A2%D8ab%FF'
        expect = b'\xa2\xd8ab\xff'
        result = urllib.parse.unquote_to_bytes(given)
        self.assertEqual(expect, result,
                         "using unquote_to_bytes(): %r != %r"
                         % (expect, result))
        # Test with a bytes as input, with unescaped non-ASCII bytes
        # (Technically an invalid URI; expect those bytes to be preserved)
        given = b'%A2\xd8ab%FF'
        expect = b'\xa2\xd8ab\xff'
        result = urllib.parse.unquote_to_bytes(given)
        self.assertEqual(expect, result,
                         "using unquote_to_bytes(): %r != %r"
                         % (expect, result))

    def test_unquote_with_unicode(self):
        # Characters in the Latin-1 range, encoded with UTF-8
        given = 'br%C3%BCckner_sapporo_20050930.doc'
        expect = 'br\u00fcckner_sapporo_20050930.doc'
        result = urllib.parse.unquote(given)
        self.assertEqual(expect, result,
                         "using unquote(): %r != %r" % (expect, result))
        # Characters in the Latin-1 range, encoded with None (default)
        result = urllib.parse.unquote(given, encoding=None, errors=None)
        self.assertEqual(expect, result,
                         "using unquote(): %r != %r" % (expect, result))

        # Characters in the Latin-1 range, encoded with Latin-1
        result = urllib.parse.unquote('br%FCckner_sapporo_20050930.doc',
                                      encoding="latin-1")
        expect = 'br\u00fcckner_sapporo_20050930.doc'
        self.assertEqual(expect, result,
                         "using unquote(): %r != %r" % (expect, result))

        # Characters in BMP, encoded with UTF-8
        given = "%E6%BC%A2%E5%AD%97"
        expect = "\u6f22\u5b57"             # "Kanji"
        result = urllib.parse.unquote(given)
        self.assertEqual(expect, result,
                         "using unquote(): %r != %r" % (expect, result))

        # Decode with UTF-8, invalid sequence
        given = "%F3%B1"
        expect = "\ufffd"                   # Replacement character
        result = urllib.parse.unquote(given)
        self.assertEqual(expect, result,
                         "using unquote(): %r != %r" % (expect, result))

        # Decode with UTF-8, invalid sequence, replace errors
        result = urllib.parse.unquote(given, errors="replace")
        self.assertEqual(expect, result,
                         "using unquote(): %r != %r" % (expect, result))

        # Decode with UTF-8, invalid sequence, ignoring errors
        given = "%F3%B1"
        expect = ""
        result = urllib.parse.unquote(given, errors="ignore")
        self.assertEqual(expect, result,
                         "using unquote(): %r != %r" % (expect, result))

        # A mix of non-ASCII and percent-encoded characters, UTF-8
        result = urllib.parse.unquote("\u6f22%C3%BC")
        expect = '\u6f22\u00fc'
        self.assertEqual(expect, result,
                         "using unquote(): %r != %r" % (expect, result))

        # A mix of non-ASCII and percent-encoded characters, Latin-1
        # (Note, the string contains non-Latin-1-representable characters)
        result = urllib.parse.unquote("\u6f22%FC", encoding="latin-1")
        expect = '\u6f22\u00fc'
        self.assertEqual(expect, result,
                         "using unquote(): %r != %r" % (expect, result))

class urlencode_Tests(unittest.TestCase):
    """Tests for urlencode()"""

    def help_inputtype(self, given, test_type):
        """Helper method for testing different input types.

        'given' must lead to only the pairs:
            * 1st, 1
            * 2nd, 2
            * 3rd, 3

        Test cannot assume anything about order.  Docs make no guarantee and
        have possible dictionary input.

        """
        expect_somewhere = ["1st=1", "2nd=2", "3rd=3"]
        result = urllib.parse.urlencode(given)
        for expected in expect_somewhere:
            self.assertIn(expected, result,
                         "testing %s: %s not found in %s" %
                         (test_type, expected, result))
        self.assertEqual(result.count('&'), 2,
                         "testing %s: expected 2 '&'s; got %s" %
                         (test_type, result.count('&')))
        amp_location = result.index('&')
        on_amp_left = result[amp_location - 1]
        on_amp_right = result[amp_location + 1]
        self.assertTrue(on_amp_left.isdigit() and on_amp_right.isdigit(),
                     "testing %s: '&' not located in proper place in %s" %
                     (test_type, result))
        self.assertEqual(len(result), (5 * 3) + 2, #5 chars per thing and amps
                         "testing %s: "
                         "unexpected number of characters: %s != %s" %
                         (test_type, len(result), (5 * 3) + 2))

    def test_using_mapping(self):
        # Test passing in a mapping object as an argument.
        self.help_inputtype({"1st":'1', "2nd":'2', "3rd":'3'},
                            "using dict as input type")

    def test_using_sequence(self):
        # Test passing in a sequence of two-item sequences as an argument.
        self.help_inputtype([('1st', '1'), ('2nd', '2'), ('3rd', '3')],
                            "using sequence of two-item tuples as input")

    def test_quoting(self):
        # Make sure keys and values are quoted using quote_plus()
        given = {"&":"="}
        expect = "%s=%s" % (hexescape('&'), hexescape('='))
        result = urllib.parse.urlencode(given)
        self.assertEqual(expect, result)
        given = {"key name":"A bunch of pluses"}
        expect = "key+name=A+bunch+of+pluses"
        result = urllib.parse.urlencode(given)
        self.assertEqual(expect, result)

    def test_doseq(self):
        # Test that passing True for 'doseq' parameter works correctly
        given = {'sequence':['1', '2', '3']}
        expect = "sequence=%s" % urllib.parse.quote_plus(str(['1', '2', '3']))
        result = urllib.parse.urlencode(given)
        self.assertEqual(expect, result)
        result = urllib.parse.urlencode(given, True)
        for value in given["sequence"]:
            expect = "sequence=%s" % value
            self.assertIn(expect, result)
        self.assertEqual(result.count('&'), 2,
                         "Expected 2 '&'s, got %s" % result.count('&'))

    def test_empty_sequence(self):
        self.assertEqual("", urllib.parse.urlencode({}))
        self.assertEqual("", urllib.parse.urlencode([]))

    def test_nonstring_values(self):
        self.assertEqual("a=1", urllib.parse.urlencode({"a": 1}))
        self.assertEqual("a=None", urllib.parse.urlencode({"a": None}))

    def test_nonstring_seq_values(self):
        self.assertEqual("a=1&a=2", urllib.parse.urlencode({"a": [1, 2]}, True))
        self.assertEqual("a=None&a=a",
                         urllib.parse.urlencode({"a": [None, "a"]}, True))
        self.assertEqual("a=a&a=b",
                         urllib.parse.urlencode({"a": {"a": 1, "b": 1}}, True))

class Pathname_Tests(unittest.TestCase):
    """Test pathname2url() and url2pathname()"""

    def test_basic(self):
        # Make sure simple tests pass
        expected_path = os.path.join("parts", "of", "a", "path")
        expected_url = "parts/of/a/path"
        result = urllib.request.pathname2url(expected_path)
        self.assertEqual(expected_url, result,
                         "pathname2url() failed; %s != %s" %
                         (result, expected_url))
        result = urllib.request.url2pathname(expected_url)
        self.assertEqual(expected_path, result,
                         "url2pathame() failed; %s != %s" %
                         (result, expected_path))

    def test_quoting(self):
        # Test automatic quoting and unquoting works for pathnam2url() and
        # url2pathname() respectively
        given = os.path.join("needs", "quot=ing", "here")
        expect = "needs/%s/here" % urllib.parse.quote("quot=ing")
        result = urllib.request.pathname2url(given)
        self.assertEqual(expect, result,
                         "pathname2url() failed; %s != %s" %
                         (expect, result))
        expect = given
        result = urllib.request.url2pathname(result)
        self.assertEqual(expect, result,
                         "url2pathname() failed; %s != %s" %
                         (expect, result))
        given = os.path.join("make sure", "using_quote")
        expect = "%s/using_quote" % urllib.parse.quote("make sure")
        result = urllib.request.pathname2url(given)
        self.assertEqual(expect, result,
                         "pathname2url() failed; %s != %s" %
                         (expect, result))
        given = "make+sure/using_unquote"
        expect = os.path.join("make+sure", "using_unquote")
        result = urllib.request.url2pathname(given)
        self.assertEqual(expect, result,
                         "url2pathname() failed; %s != %s" %
                         (expect, result))

class Utility_Tests(unittest.TestCase):
    """Testcase to test the various utility functions in the urllib."""

    def test_splitpasswd(self):
        """Some of password examples are not sensible, but it is added to
        confirming to RFC2617 and addressing issue4675.
        """
        self.assertEqual(('user', 'ab'),urllib.parse.splitpasswd('user:ab'))
        self.assertEqual(('user', 'a\nb'),urllib.parse.splitpasswd('user:a\nb'))
        self.assertEqual(('user', 'a\tb'),urllib.parse.splitpasswd('user:a\tb'))
        self.assertEqual(('user', 'a\rb'),urllib.parse.splitpasswd('user:a\rb'))
        self.assertEqual(('user', 'a\fb'),urllib.parse.splitpasswd('user:a\fb'))
        self.assertEqual(('user', 'a\vb'),urllib.parse.splitpasswd('user:a\vb'))
        self.assertEqual(('user', 'a:b'),urllib.parse.splitpasswd('user:a:b'))


class URLopener_Tests(unittest.TestCase):
    """Testcase to test the open method of URLopener class."""

    def test_quoted_open(self):
        class DummyURLopener(urllib.request.URLopener):
            def open_spam(self, url):
                return url

        self.assertEqual(DummyURLopener().open(
            'spam://example/ /'),'//example/%20/')

        # test the safe characters are not quoted by urlopen
        self.assertEqual(DummyURLopener().open(
            "spam://c:|windows%/:=&?~#+!$,;'@()*[]|/path/"),
            "//c:|windows%/:=&?~#+!$,;'@()*[]|/path/")

# Just commented them out.
# Can't really tell why keep failing in windows and sparc.
# Everywhere else they work ok, but on those machines, someteimes
# fail in one of the tests, sometimes in other. I have a linux, and
# the tests go ok.
# If anybody has one of the problematic enviroments, please help!
# .   Facundo
#
# def server(evt):
#     import socket, time
#     serv = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
#     serv.settimeout(3)
#     serv.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
#     serv.bind(("", 9093))
#     serv.listen(5)
#     try:
#         conn, addr = serv.accept()
#         conn.send("1 Hola mundo\n")
#         cantdata = 0
#         while cantdata < 13:
#             data = conn.recv(13-cantdata)
#             cantdata += len(data)
#             time.sleep(.3)
#         conn.send("2 No more lines\n")
#         conn.close()
#     except socket.timeout:
#         pass
#     finally:
#         serv.close()
#         evt.set()
#
# class FTPWrapperTests(unittest.TestCase):
#
#     def setUp(self):
#         import ftplib, time, threading
#         ftplib.FTP.port = 9093
#         self.evt = threading.Event()
#         threading.Thread(target=server, args=(self.evt,)).start()
#         time.sleep(.1)
#
#     def tearDown(self):
#         self.evt.wait()
#
#     def testBasic(self):
#         # connects
#         ftp = urllib.ftpwrapper("myuser", "mypass", "localhost", 9093, [])
#         ftp.close()
#
#     def testTimeoutNone(self):
#         # global default timeout is ignored
#         import socket
#         self.assertTrue(socket.getdefaulttimeout() is None)
#         socket.setdefaulttimeout(30)
#         try:
#             ftp = urllib.ftpwrapper("myuser", "mypass", "localhost", 9093, [])
#         finally:
#             socket.setdefaulttimeout(None)
#         self.assertEqual(ftp.ftp.sock.gettimeout(), 30)
#         ftp.close()
#
#     def testTimeoutDefault(self):
#         # global default timeout is used
#         import socket
#         self.assertTrue(socket.getdefaulttimeout() is None)
#         socket.setdefaulttimeout(30)
#         try:
#             ftp = urllib.ftpwrapper("myuser", "mypass", "localhost", 9093, [])
#         finally:
#             socket.setdefaulttimeout(None)
#         self.assertEqual(ftp.ftp.sock.gettimeout(), 30)
#         ftp.close()
#
#     def testTimeoutValue(self):
#         ftp = urllib.ftpwrapper("myuser", "mypass", "localhost", 9093, [],
#                                 timeout=30)
#         self.assertEqual(ftp.ftp.sock.gettimeout(), 30)
#         ftp.close()



def test_main():
    support.run_unittest(
        urlopen_FileTests,
        urlopen_HttpTests,
        urlretrieve_FileTests,
        ProxyTests,
        QuotingTests,
        UnquotingTests,
        urlencode_Tests,
        Pathname_Tests,
        Utility_Tests,
        URLopener_Tests,
        #FTPWrapperTests,
    )



if __name__ == '__main__':
    test_main()