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| 1 # Copyright 2013 the V8 project authors. All rights reserved. | |
| 2 # Redistribution and use in source and binary forms, with or without | |
| 3 # modification, are permitted provided that the following conditions are | |
| 4 # met: | |
| 5 # | |
| 6 # * Redistributions of source code must retain the above copyright | |
| 7 # notice, this list of conditions and the following disclaimer. | |
| 8 # * Redistributions in binary form must reproduce the above | |
| 9 # copyright notice, this list of conditions and the following | |
| 10 # disclaimer in the documentation and/or other materials provided | |
| 11 # with the distribution. | |
| 12 # * Neither the name of Google Inc. nor the names of its | |
| 13 # contributors may be used to endorse or promote products derived | |
| 14 # from this software without specific prior written permission. | |
| 15 # | |
| 16 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 17 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 18 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 19 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| 20 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 21 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 22 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 23 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 24 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 25 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 26 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 27 | |
| 28 import unittest | |
| 29 from automaton import Action | |
| 30 from rule_parser import RuleProcessor | |
| 31 from nfa_builder import NfaBuilder | |
| 32 from dfa import Dfa | |
| 33 | |
| 34 def process_rules(rules): | |
| 35 rule_map = {} | |
| 36 for name, automata in RuleProcessor.parse(rules).automata_iter(): | |
| 37 rule_map[name] = automata | |
| 38 return rule_map | |
| 39 | |
| 40 class ActionTestCase(unittest.TestCase): | |
| 41 | |
| 42 def __verify_last_action(self, automata, string, expected_code): | |
| 43 expected_code = (expected_code, None) | |
| 44 for automaton in [automata.dfa(), automata.minimal_dfa()]: | |
| 45 actions = list(automaton.collect_actions(string)) | |
| 46 self.assertEqual(actions[-1], Dfa.terminal_action()) | |
| 47 self.assertEqual(actions[-2].match_action(), expected_code) | |
| 48 | |
| 49 def test_action_precedence(self): | |
| 50 rules = '''<<default>> | |
| 51 "key" <|KEYWORD|> | |
| 52 /[a-z]+/ <|ID|>''' | |
| 53 automata_for_conditions = process_rules(rules) | |
| 54 self.assertEqual(len(automata_for_conditions), 1) | |
| 55 self.assertTrue('default' in automata_for_conditions) | |
| 56 automata = automata_for_conditions['default'] | |
| 57 | |
| 58 self.__verify_last_action(automata, 'foo', 'ID') | |
| 59 self.__verify_last_action(automata, 'key', 'KEYWORD') | |
| 60 self.__verify_last_action(automata, 'k', 'ID') | |
| 61 self.__verify_last_action(automata, 'ke', 'ID') | |
| 62 self.__verify_last_action(automata, 'keys', 'ID') | |
| 63 | |
| 64 def test_wrong_action_precedence(self): | |
| 65 rules = '''<<default>> | |
| 66 /[a-z]+/ <|ID|> | |
| 67 "key" <|KEYWORD|>''' | |
| 68 automata_for_conditions = process_rules(rules) | |
| 69 self.assertEqual(len(automata_for_conditions), 1) | |
| 70 self.assertTrue('default' in automata_for_conditions) | |
| 71 automata = automata_for_conditions['default'] | |
| 72 | |
| 73 # The keyword is not recognized because of the rule preference order (ID | |
| 74 # is preferred over KEYWORD). | |
| 75 self.__verify_last_action(automata, 'foo', 'ID') | |
| 76 self.__verify_last_action(automata, 'key', 'ID') | |
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