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# Copyright 2014 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import importlib.util
import os.path
import sys
import unittest
def _GetDirAbove(dirname):
"""Returns the directory "above" this file containing |dirname| (which must
also be "above" this file)."""
path = os.path.abspath(__file__)
while True:
path, tail = os.path.split(path)
assert tail
if tail == dirname:
return path
sys.path.insert(1, os.path.join(_GetDirAbove("mojo"), "third_party"))
from ply import lex
try:
importlib.util.find_spec("mojom")
except ImportError:
sys.path.append(os.path.join(_GetDirAbove("pylib"), "pylib"))
import mojom.parse.lexer
# This (monkey-patching LexToken to make comparison value-based) is evil, but
# we'll do it anyway. (I'm pretty sure ply's lexer never cares about comparing
# for object identity.)
def _LexTokenEq(self, other):
return self.type == other.type and self.value == other.value and \
self.lineno == other.lineno and self.lexpos == other.lexpos
setattr(lex.LexToken, '__eq__', _LexTokenEq)
def _MakeLexToken(token_type, value, lineno=1, lexpos=0):
"""Makes a LexToken with the given parameters. (Note that lineno is 1-based,
but lexpos is 0-based.)"""
rv = lex.LexToken()
rv.type, rv.value, rv.lineno, rv.lexpos = token_type, value, lineno, lexpos
return rv
def _MakeLexTokenForKeyword(keyword, **kwargs):
"""Makes a LexToken for the given keyword."""
return _MakeLexToken(keyword.upper(), keyword.lower(), **kwargs)
class LexerTest(unittest.TestCase):
"""Tests |mojom.parse.lexer.Lexer|."""
def __init__(self, *args, **kwargs):
unittest.TestCase.__init__(self, *args, **kwargs)
# Clone all lexer instances from this one, since making a lexer is slow.
self._zygote_lexer = lex.lex(mojom.parse.lexer.Lexer("my_file.mojom"))
def testValidKeywords(self):
"""Tests valid keywords."""
self.assertEquals(
self._SingleTokenForInput("handle"), _MakeLexTokenForKeyword("handle"))
self.assertEquals(
self._SingleTokenForInput("import"), _MakeLexTokenForKeyword("import"))
self.assertEquals(
self._SingleTokenForInput("module"), _MakeLexTokenForKeyword("module"))
self.assertEquals(
self._SingleTokenForInput("struct"), _MakeLexTokenForKeyword("struct"))
self.assertEquals(
self._SingleTokenForInput("union"), _MakeLexTokenForKeyword("union"))
self.assertEquals(
self._SingleTokenForInput("interface"),
_MakeLexTokenForKeyword("interface"))
self.assertEquals(
self._SingleTokenForInput("enum"), _MakeLexTokenForKeyword("enum"))
self.assertEquals(
self._SingleTokenForInput("const"), _MakeLexTokenForKeyword("const"))
self.assertEquals(
self._SingleTokenForInput("true"), _MakeLexTokenForKeyword("true"))
self.assertEquals(
self._SingleTokenForInput("false"), _MakeLexTokenForKeyword("false"))
self.assertEquals(
self._SingleTokenForInput("default"),
_MakeLexTokenForKeyword("default"))
self.assertEquals(
self._SingleTokenForInput("array"), _MakeLexTokenForKeyword("array"))
self.assertEquals(
self._SingleTokenForInput("map"), _MakeLexTokenForKeyword("map"))
self.assertEquals(
self._SingleTokenForInput("associated"),
_MakeLexTokenForKeyword("associated"))
def testValidIdentifiers(self):
"""Tests identifiers."""
self.assertEquals(
self._SingleTokenForInput("abcd"), _MakeLexToken("NAME", "abcd"))
self.assertEquals(
self._SingleTokenForInput("AbC_d012_"),
_MakeLexToken("NAME", "AbC_d012_"))
self.assertEquals(
self._SingleTokenForInput("_0123"), _MakeLexToken("NAME", "_0123"))
def testInvalidIdentifiers(self):
with self.assertRaisesRegexp(
mojom.parse.lexer.LexError,
r"^my_file\.mojom:1: Error: Illegal character '\$'$"):
self._TokensForInput("$abc")
with self.assertRaisesRegexp(
mojom.parse.lexer.LexError,
r"^my_file\.mojom:1: Error: Illegal character '\$'$"):
self._TokensForInput("a$bc")
def testDecimalIntegerConstants(self):
self.assertEquals(
self._SingleTokenForInput("0"), _MakeLexToken("INT_CONST_DEC", "0"))
self.assertEquals(
self._SingleTokenForInput("1"), _MakeLexToken("INT_CONST_DEC", "1"))
self.assertEquals(
self._SingleTokenForInput("123"), _MakeLexToken("INT_CONST_DEC", "123"))
self.assertEquals(
self._SingleTokenForInput("10"), _MakeLexToken("INT_CONST_DEC", "10"))
def testValidTokens(self):
"""Tests valid tokens (which aren't tested elsewhere)."""
# Keywords tested in |testValidKeywords|.
# NAME tested in |testValidIdentifiers|.
self.assertEquals(
self._SingleTokenForInput("@123"), _MakeLexToken("ORDINAL", "@123"))
self.assertEquals(
self._SingleTokenForInput("456"), _MakeLexToken("INT_CONST_DEC", "456"))
self.assertEquals(
self._SingleTokenForInput("0x01aB2eF3"),
_MakeLexToken("INT_CONST_HEX", "0x01aB2eF3"))
self.assertEquals(
self._SingleTokenForInput("123.456"),
_MakeLexToken("FLOAT_CONST", "123.456"))
self.assertEquals(
self._SingleTokenForInput("\"hello\""),
_MakeLexToken("STRING_LITERAL", "\"hello\""))
self.assertEquals(
self._SingleTokenForInput("+"), _MakeLexToken("PLUS", "+"))
self.assertEquals(
self._SingleTokenForInput("-"), _MakeLexToken("MINUS", "-"))
self.assertEquals(
self._SingleTokenForInput("?"), _MakeLexToken("QSTN", "?"))
self.assertEquals(
self._SingleTokenForInput("="), _MakeLexToken("EQUALS", "="))
self.assertEquals(
self._SingleTokenForInput("=>"), _MakeLexToken("RESPONSE", "=>"))
self.assertEquals(
self._SingleTokenForInput("("), _MakeLexToken("LPAREN", "("))
self.assertEquals(
self._SingleTokenForInput(")"), _MakeLexToken("RPAREN", ")"))
self.assertEquals(
self._SingleTokenForInput("["), _MakeLexToken("LBRACKET", "["))
self.assertEquals(
self._SingleTokenForInput("]"), _MakeLexToken("RBRACKET", "]"))
self.assertEquals(
self._SingleTokenForInput("{"), _MakeLexToken("LBRACE", "{"))
self.assertEquals(
self._SingleTokenForInput("}"), _MakeLexToken("RBRACE", "}"))
self.assertEquals(
self._SingleTokenForInput("<"), _MakeLexToken("LANGLE", "<"))
self.assertEquals(
self._SingleTokenForInput(">"), _MakeLexToken("RANGLE", ">"))
self.assertEquals(
self._SingleTokenForInput(";"), _MakeLexToken("SEMI", ";"))
self.assertEquals(
self._SingleTokenForInput(","), _MakeLexToken("COMMA", ","))
self.assertEquals(self._SingleTokenForInput("."), _MakeLexToken("DOT", "."))
def _TokensForInput(self, input_string):
"""Gets a list of tokens for the given input string."""
lexer = self._zygote_lexer.clone()
lexer.input(input_string)
rv = []
while True:
tok = lexer.token()
if not tok:
return rv
rv.append(tok)
def _SingleTokenForInput(self, input_string):
"""Gets the single token for the given input string. (Raises an exception if
the input string does not result in exactly one token.)"""
toks = self._TokensForInput(input_string)
assert len(toks) == 1
return toks[0]
if __name__ == "__main__":
unittest.main()
|
