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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 identifier" 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()
|
