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import antlr3
import testbase
import unittest
import os
import sys
from cStringIO import StringIO
import difflib
import textwrap
class t012lexerXML(testbase.ANTLRTest):
def setUp(self):
self.compileGrammar('t012lexerXMLLexer.g')
def lexerClass(self, base):
class TLexer(base):
def emitErrorMessage(self, msg):
# report errors to /dev/null
pass
def reportError(self, re):
# no error recovery yet, just crash!
raise re
return TLexer
def testValid(self):
inputPath = os.path.splitext(__file__)[0] + '.input'
stream = antlr3.StringStream(unicode(open(inputPath).read(), 'utf-8'))
lexer = self.getLexer(stream)
while True:
token = lexer.nextToken()
if token.type == self.lexerModule.EOF:
break
output = unicode(lexer.outbuf.getvalue(), 'utf-8')
outputPath = os.path.splitext(__file__)[0] + '.output'
testOutput = unicode(open(outputPath).read(), 'utf-8')
success = (output == testOutput)
if not success:
d = difflib.Differ()
r = d.compare(output.splitlines(1), testOutput.splitlines(1))
self.fail(
''.join([l.encode('ascii', 'backslashreplace') for l in r])
)
def testMalformedInput1(self):
input = textwrap.dedent("""\
<?xml version='1.0'?>
<document d>
</document>
""")
stream = antlr3.StringStream(input)
lexer = self.getLexer(stream)
try:
while True:
token = lexer.nextToken()
if token.type == antlr3.EOF:
break
raise AssertionError
except antlr3.NoViableAltException, exc:
assert exc.unexpectedType == '>', repr(exc.unexpectedType)
assert exc.charPositionInLine == 11, repr(exc.charPositionInLine)
assert exc.line == 2, repr(exc.line)
def testMalformedInput2(self):
input = textwrap.dedent("""\
<?tml version='1.0'?>
<document>
</document>
""")
stream = antlr3.StringStream(input)
lexer = self.getLexer(stream)
try:
while True:
token = lexer.nextToken()
if token.type == antlr3.EOF:
break
raise AssertionError
except antlr3.MismatchedSetException, exc:
assert exc.unexpectedType == 't', repr(exc.unexpectedType)
assert exc.charPositionInLine == 2, repr(exc.charPositionInLine)
assert exc.line == 1, repr(exc.line)
def testMalformedInput3(self):
input = textwrap.dedent("""\
<?xml version='1.0'?>
<docu ment attr="foo">
</document>
""")
stream = antlr3.StringStream(input)
lexer = self.getLexer(stream)
try:
while True:
token = lexer.nextToken()
if token.type == antlr3.EOF:
break
raise AssertionError
except antlr3.NoViableAltException, exc:
assert exc.unexpectedType == 'a', repr(exc.unexpectedType)
assert exc.charPositionInLine == 11, repr(exc.charPositionInLine)
assert exc.line == 2, repr(exc.line)
if __name__ == '__main__':
unittest.main()
## # run an infinite loop with randomly mangled input
## while True:
## print "ping"
## input = """\
## <?xml version='1.0'?>
## <!DOCTYPE component [
## <!ELEMENT component (PCDATA|sub)*>
## <!ATTLIST component
## attr CDATA #IMPLIED
## attr2 CDATA #IMPLIED
## >
## <!ELMENT sub EMPTY>
## ]>
## <component attr="val'ue" attr2='val"ue'>
## <!-- This is a comment -->
## Text
## <![CDATA[huhu]]>
## &
## <
## <?xtal cursor='11'?>
## <sub/>
## <sub></sub>
## </component>
## """
## import random
## input = list(input) # make it mutable
## for _ in range(3):
## p1 = random.randrange(len(input))
## p2 = random.randrange(len(input))
## c1 = input[p1]
## input[p1] = input[p2]
## input[p2] = c1
## input = ''.join(input) # back to string
## stream = antlr3.StringStream(input)
## lexer = Lexer(stream)
## try:
## while True:
## token = lexer.nextToken()
## if token.type == EOF:
## break
## except antlr3.RecognitionException, exc:
## print exc
## for l in input.splitlines()[0:exc.line]:
## print l
## print ' '*exc.charPositionInLine + '^'
## except BaseException, exc:
## print '\n'.join(['%02d: %s' % (idx+1, l) for idx, l in enumerate(input.splitlines())])
## print "%s at %d:%d" % (exc, stream.line, stream.charPositionInLine)
## print
## raise
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