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# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license
# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
#
# Permission to use, copy, modify, and distribute this software and its
# documentation for any purpose with or without fee is hereby granted,
# provided that the above copyright notice and this permission notice
# appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
import unittest
import dns.exception
import dns.tokenizer
Token = dns.tokenizer.Token
class TokenizerTestCase(unittest.TestCase):
def testStr(self):
tok = dns.tokenizer.Tokenizer('foo')
token = tok.get()
self.assertEqual(token, Token(dns.tokenizer.IDENTIFIER, 'foo'))
def testQuotedString1(self):
tok = dns.tokenizer.Tokenizer(r'"foo"')
token = tok.get()
self.assertEqual(token, Token(dns.tokenizer.QUOTED_STRING, 'foo'))
def testQuotedString2(self):
tok = dns.tokenizer.Tokenizer(r'""')
token = tok.get()
self.assertEqual(token, Token(dns.tokenizer.QUOTED_STRING, ''))
def testQuotedString3(self):
tok = dns.tokenizer.Tokenizer(r'"\"foo\""')
token = tok.get()
self.assertEqual(token, Token(dns.tokenizer.QUOTED_STRING, '\\"foo\\"'))
def testQuotedString4(self):
tok = dns.tokenizer.Tokenizer(r'"foo\010bar"')
token = tok.get()
self.assertEqual(token, Token(dns.tokenizer.QUOTED_STRING,
'foo\\010bar'))
def testQuotedString5(self):
with self.assertRaises(dns.exception.UnexpectedEnd):
tok = dns.tokenizer.Tokenizer(r'"foo')
tok.get()
def testQuotedString6(self):
with self.assertRaises(dns.exception.SyntaxError):
tok = dns.tokenizer.Tokenizer(r'"foo\01')
tok.get()
def testQuotedString7(self):
with self.assertRaises(dns.exception.SyntaxError):
tok = dns.tokenizer.Tokenizer('"foo\nbar"')
tok.get()
def testEmpty1(self):
tok = dns.tokenizer.Tokenizer('')
token = tok.get()
self.assertTrue(token.is_eof())
def testEmpty2(self):
tok = dns.tokenizer.Tokenizer('')
token1 = tok.get()
token2 = tok.get()
self.assertTrue(token1.is_eof() and token2.is_eof())
def testEOL(self):
tok = dns.tokenizer.Tokenizer('\n')
token1 = tok.get()
token2 = tok.get()
self.assertTrue(token1.is_eol() and token2.is_eof())
def testWS1(self):
tok = dns.tokenizer.Tokenizer(' \n')
token1 = tok.get()
self.assertTrue(token1.is_eol())
def testWS2(self):
tok = dns.tokenizer.Tokenizer(' \n')
token1 = tok.get(want_leading=True)
self.assertTrue(token1.is_whitespace())
def testComment1(self):
tok = dns.tokenizer.Tokenizer(' ;foo\n')
token1 = tok.get()
self.assertTrue(token1.is_eol())
def testComment2(self):
tok = dns.tokenizer.Tokenizer(' ;foo\n')
token1 = tok.get(want_comment=True)
token2 = tok.get()
self.assertEqual(token1, Token(dns.tokenizer.COMMENT, 'foo'))
self.assertTrue(token2.is_eol())
def testComment3(self):
tok = dns.tokenizer.Tokenizer(' ;foo bar\n')
token1 = tok.get(want_comment=True)
token2 = tok.get()
self.assertEqual(token1, Token(dns.tokenizer.COMMENT, 'foo bar'))
self.assertTrue(token2.is_eol())
def testMultiline1(self):
tok = dns.tokenizer.Tokenizer('( foo\n\n bar\n)')
tokens = list(iter(tok))
self.assertEqual(tokens, [Token(dns.tokenizer.IDENTIFIER, 'foo'),
Token(dns.tokenizer.IDENTIFIER, 'bar')])
def testMultiline2(self):
tok = dns.tokenizer.Tokenizer('( foo\n\n bar\n)\n')
tokens = list(iter(tok))
self.assertEqual(tokens, [Token(dns.tokenizer.IDENTIFIER, 'foo'),
Token(dns.tokenizer.IDENTIFIER, 'bar'),
Token(dns.tokenizer.EOL, '\n')])
def testMultiline3(self):
with self.assertRaises(dns.exception.SyntaxError):
tok = dns.tokenizer.Tokenizer('foo)')
list(iter(tok))
def testMultiline4(self):
with self.assertRaises(dns.exception.SyntaxError):
tok = dns.tokenizer.Tokenizer('((foo)')
list(iter(tok))
def testUnget1(self):
tok = dns.tokenizer.Tokenizer('foo')
t1 = tok.get()
tok.unget(t1)
t2 = tok.get()
self.assertEqual(t1, t2)
self.assertEqual(t1.ttype, dns.tokenizer.IDENTIFIER)
self.assertEqual(t1.value, 'foo')
def testUnget2(self):
with self.assertRaises(dns.tokenizer.UngetBufferFull):
tok = dns.tokenizer.Tokenizer('foo')
t1 = tok.get()
tok.unget(t1)
tok.unget(t1)
def testGetEOL1(self):
tok = dns.tokenizer.Tokenizer('\n')
t = tok.get_eol()
self.assertEqual(t, '\n')
def testGetEOL2(self):
tok = dns.tokenizer.Tokenizer('')
t = tok.get_eol()
self.assertEqual(t, '')
def testEscapedDelimiter1(self):
tok = dns.tokenizer.Tokenizer(r'ch\ ld')
t = tok.get()
self.assertEqual(t.ttype, dns.tokenizer.IDENTIFIER)
self.assertEqual(t.value, r'ch\ ld')
def testEscapedDelimiter2(self):
tok = dns.tokenizer.Tokenizer(r'ch\032ld')
t = tok.get()
self.assertEqual(t.ttype, dns.tokenizer.IDENTIFIER)
self.assertEqual(t.value, r'ch\032ld')
def testEscapedDelimiter3(self):
tok = dns.tokenizer.Tokenizer(r'ch\ild')
t = tok.get()
self.assertEqual(t.ttype, dns.tokenizer.IDENTIFIER)
self.assertEqual(t.value, r'ch\ild')
def testEscapedDelimiter1u(self):
tok = dns.tokenizer.Tokenizer(r'ch\ ld')
t = tok.get().unescape()
self.assertEqual(t.ttype, dns.tokenizer.IDENTIFIER)
self.assertEqual(t.value, r'ch ld')
def testEscapedDelimiter2u(self):
tok = dns.tokenizer.Tokenizer(r'ch\032ld')
t = tok.get().unescape()
self.assertEqual(t.ttype, dns.tokenizer.IDENTIFIER)
self.assertEqual(t.value, 'ch ld')
def testEscapedDelimiter3u(self):
tok = dns.tokenizer.Tokenizer(r'ch\ild')
t = tok.get().unescape()
self.assertEqual(t.ttype, dns.tokenizer.IDENTIFIER)
self.assertEqual(t.value, r'child')
def testGetUInt(self):
tok = dns.tokenizer.Tokenizer('1234')
v = tok.get_int()
self.assertEqual(v, 1234)
with self.assertRaises(dns.exception.SyntaxError):
tok = dns.tokenizer.Tokenizer('"1234"')
tok.get_int()
with self.assertRaises(dns.exception.SyntaxError):
tok = dns.tokenizer.Tokenizer('q1234')
tok.get_int()
with self.assertRaises(dns.exception.SyntaxError):
tok = dns.tokenizer.Tokenizer('281474976710656')
tok.get_uint48()
with self.assertRaises(dns.exception.SyntaxError):
tok = dns.tokenizer.Tokenizer('4294967296')
tok.get_uint32()
with self.assertRaises(dns.exception.SyntaxError):
tok = dns.tokenizer.Tokenizer('65536')
tok.get_uint16()
with self.assertRaises(dns.exception.SyntaxError):
tok = dns.tokenizer.Tokenizer('256')
tok.get_uint8()
# Even though it is badly named get_int(), it's really get_unit!
with self.assertRaises(dns.exception.SyntaxError):
tok = dns.tokenizer.Tokenizer('-1234')
tok.get_int()
# get_uint16 can do other bases too, and has a custom error
# for base 8.
tok = dns.tokenizer.Tokenizer('177777')
self.assertEqual(tok.get_uint16(base=8), 65535)
with self.assertRaises(dns.exception.SyntaxError):
tok = dns.tokenizer.Tokenizer('200000')
tok.get_uint16(base=8)
def testGetString(self):
tok = dns.tokenizer.Tokenizer('foo')
v = tok.get_string()
self.assertEqual(v, 'foo')
tok = dns.tokenizer.Tokenizer('"foo"')
v = tok.get_string()
self.assertEqual(v, 'foo')
tok = dns.tokenizer.Tokenizer('abcdefghij')
v = tok.get_string(max_length=10)
self.assertEqual(v, 'abcdefghij')
with self.assertRaises(dns.exception.SyntaxError):
tok = dns.tokenizer.Tokenizer('abcdefghij')
tok.get_string(max_length=9)
tok = dns.tokenizer.Tokenizer('')
with self.assertRaises(dns.exception.SyntaxError):
tok.get_string()
def testMultiLineWithComment(self):
tok = dns.tokenizer.Tokenizer('( ; abc\n)')
tok.get_eol()
# Nothing to assert here, as we're testing tok.get_eol() does NOT
# raise.
def testEOLAfterComment(self):
tok = dns.tokenizer.Tokenizer('; abc\n')
t = tok.get()
self.assertTrue(t.is_eol())
def testEOFAfterComment(self):
tok = dns.tokenizer.Tokenizer('; abc')
t = tok.get()
self.assertTrue(t.is_eof())
def testMultiLineWithEOFAfterComment(self):
with self.assertRaises(dns.exception.SyntaxError):
tok = dns.tokenizer.Tokenizer('( ; abc')
tok.get_eol()
def testEscapeUnexpectedEnd(self):
with self.assertRaises(dns.exception.UnexpectedEnd):
tok = dns.tokenizer.Tokenizer('\\')
tok.get()
def testEscapeBounds(self):
with self.assertRaises(dns.exception.SyntaxError):
tok = dns.tokenizer.Tokenizer('\\256')
tok.get().unescape()
with self.assertRaises(dns.exception.SyntaxError):
tok = dns.tokenizer.Tokenizer('\\256')
tok.get().unescape_to_bytes()
def testGetUngetRegetComment(self):
tok = dns.tokenizer.Tokenizer(';comment')
t1 = tok.get(want_comment=True)
tok.unget(t1)
t2 = tok.get(want_comment=True)
self.assertEqual(t1, t2)
def testBadAsName(self):
with self.assertRaises(dns.exception.SyntaxError):
tok = dns.tokenizer.Tokenizer('"not an identifier"')
t = tok.get()
tok.as_name(t)
def testBadGetTTL(self):
with self.assertRaises(dns.exception.SyntaxError):
tok = dns.tokenizer.Tokenizer('"not an identifier"')
tok.get_ttl()
def testBadGetEOL(self):
with self.assertRaises(dns.exception.SyntaxError):
tok = dns.tokenizer.Tokenizer('"not an identifier"')
tok.get_eol_as_token()
def testDanglingEscapes(self):
for text in ['"\\"', '"\\0"', '"\\00"', '"\\00a"']:
with self.assertRaises(dns.exception.SyntaxError):
tok = dns.tokenizer.Tokenizer(text)
tok.get().unescape()
with self.assertRaises(dns.exception.SyntaxError):
tok = dns.tokenizer.Tokenizer(text)
tok.get().unescape_to_bytes()
def testTokenMisc(self):
t1 = dns.tokenizer.Token(dns.tokenizer.IDENTIFIER, 'hi')
t2 = dns.tokenizer.Token(dns.tokenizer.IDENTIFIER, 'hi')
t3 = dns.tokenizer.Token(dns.tokenizer.IDENTIFIER, 'there')
self.assertEqual(t1, t2)
self.assertFalse(t1 == 'hi') # not NotEqual because we want to use ==
self.assertNotEqual(t1, 'hi')
self.assertNotEqual(t1, t3)
self.assertEqual(str(t1), '3 "hi"')
def testBadConcatenateRemaining(self):
with self.assertRaises(dns.exception.SyntaxError):
tok = dns.tokenizer.Tokenizer('a b "not an identifer" c')
tok.concatenate_remaining_identifiers()
def testStdinFilename(self):
tok = dns.tokenizer.Tokenizer()
self.assertEqual(tok.filename, '<stdin>')
def testBytesLiteral(self):
tok = dns.tokenizer.Tokenizer(b'this is input')
self.assertEqual(tok.get().value, 'this')
self.assertEqual(tok.filename, '<string>')
tok = dns.tokenizer.Tokenizer(b'this is input', 'myfilename')
self.assertEqual(tok.filename, 'myfilename')
def testUngetBranches(self):
tok = dns.tokenizer.Tokenizer(b' this is input')
t = tok.get(want_leading=True)
tok.unget(t)
t = tok.get(want_leading=True)
self.assertEqual(t.ttype, dns.tokenizer.WHITESPACE)
tok.unget(t)
t = tok.get()
self.assertEqual(t.ttype, dns.tokenizer.IDENTIFIER)
self.assertEqual(t.value, 'this')
tok = dns.tokenizer.Tokenizer(b'; this is input\n')
t = tok.get(want_comment=True)
tok.unget(t)
t = tok.get(want_comment=True)
self.assertEqual(t.ttype, dns.tokenizer.COMMENT)
tok.unget(t)
t = tok.get()
self.assertEqual(t.ttype, dns.tokenizer.EOL)
if __name__ == '__main__':
unittest.main()
|
