| Eli Bendersky | 3921e8e | 2010-05-21 09:05:39 +0300 | [diff] [blame] | 1 | import re
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| 2 | import sys
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| 3 | import unittest
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| 4 |
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| 5 | sys.path.insert(0, '..')
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| 6 | from pycparser.c_lexer import CLexer
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| 7 |
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| 8 |
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| 9 | def token_list(clex):
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| 10 | return list(iter(clex.token, None))
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| 11 |
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| 12 |
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| 13 | def token_types(clex): |
| 14 | return [i.type for i in token_list(clex)]
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| 15 |
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| 16 |
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| 17 | class TestCLexerNoErrors(unittest.TestCase):
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| 18 | """ Test lexing of strings that are not supposed to cause
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| 19 | errors. Therefore, the error_func passed to the lexer
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| 20 | raises an exception. |
| 21 | """
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| 22 | def error_func(self, msg, line, column): |
| 23 | self.fail(msg)
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| 24 |
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| 25 | def type_lookup_func(self, typ):
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| 26 | if typ.startswith('mytype'):
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| 27 | return True |
| 28 | else:
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| 29 | return False
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| 30 |
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| 31 | def setUp(self): |
| 32 | self.clex = CLexer(self.error_func, self.type_lookup_func)
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| 33 | self.clex.build(optimize=False)
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| 34 |
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| 35 | def assertTokensTypes(self, str, types):
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| 36 | self.clex.input(str) |
| 37 | self.assertEqual(token_types(self.clex), types)
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| 38 |
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| 39 | def test_trivial_tokens(self):
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| 40 | self.assertTokensTypes('1', ['INT_CONST_DEC'])
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| 41 | self.assertTokensTypes('-', ['MINUS'])
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| 42 | self.assertTokensTypes('volatile', ['VOLATILE'])
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| 43 | self.assertTokensTypes('...', ['ELLIPSIS'])
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| 44 | self.assertTokensTypes('++', ['PLUSPLUS'])
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| 45 | self.assertTokensTypes('case int', ['CASE', 'INT'])
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| 46 | self.assertTokensTypes('caseint', ['ID'])
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| 47 | self.assertTokensTypes('i ^= 1;', ['ID', 'XOREQUAL', 'INT_CONST_DEC', 'SEMI'])
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| 48 |
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| 49 | def test_id_typeid(self): |
| 50 | self.assertTokensTypes('myt', ['ID'])
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| 51 | self.assertTokensTypes('mytype', ['TYPEID'])
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| 52 | self.assertTokensTypes('mytype6 var', ['TYPEID', 'ID'])
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| 53 |
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| 54 | def test_integer_constants(self):
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| 55 | self.assertTokensTypes('12', ['INT_CONST_DEC'])
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| 56 | self.assertTokensTypes('12u', ['INT_CONST_DEC'])
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| 57 | self.assertTokensTypes('199872Ul', ['INT_CONST_DEC'])
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| 58 |
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| 59 | self.assertTokensTypes('077', ['INT_CONST_OCT'])
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| 60 | self.assertTokensTypes('0123456L', ['INT_CONST_OCT'])
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| 61 |
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| 62 | self.assertTokensTypes('0xf7', ['INT_CONST_HEX'])
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| 63 | self.assertTokensTypes('0x01202AAbbf7Ul', ['INT_CONST_HEX'])
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| 64 |
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| 65 | # no 0 before x, so ID catches it
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| 66 | self.assertTokensTypes('xf7', ['ID'])
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| 67 |
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| 68 | # - is MINUS, the rest a constnant
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| 69 | self.assertTokensTypes('-1', ['MINUS', 'INT_CONST_DEC'])
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| 70 |
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| 71 | def test_floating_constants(self): |
| 72 | self.assertTokensTypes('1.5f', ['FLOAT_CONST'])
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| 73 | self.assertTokensTypes('01.5', ['FLOAT_CONST'])
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| 74 | self.assertTokensTypes('.15L', ['FLOAT_CONST'])
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| 75 | self.assertTokensTypes('0.', ['FLOAT_CONST'])
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| 76 |
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| 77 | # but just a period is a period
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| 78 | self.assertTokensTypes('.', ['PERIOD'])
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| 79 |
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| 80 | self.assertTokensTypes('3.3e-3', ['FLOAT_CONST'])
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| 81 | self.assertTokensTypes('.7e25L', ['FLOAT_CONST'])
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| 82 | self.assertTokensTypes('6.e+125f', ['FLOAT_CONST'])
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| 83 | self.assertTokensTypes('666e666', ['FLOAT_CONST'])
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| 84 | self.assertTokensTypes('00666e+3', ['FLOAT_CONST'])
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| 85 |
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| 86 | # but this is a hex integer + 3
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| 87 | self.assertTokensTypes('0x0666e+3', ['INT_CONST_HEX', 'PLUS', 'INT_CONST_DEC'])
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| 88 |
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| 89 | def test_char_constants(self): |
| 90 | self.assertTokensTypes(r"""'x'""", ['CHAR_CONST'])
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| 91 | self.assertTokensTypes(r"""L'x'""", ['WCHAR_CONST'])
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| 92 | self.assertTokensTypes(r"""'\t'""", ['CHAR_CONST'])
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| 93 | self.assertTokensTypes(r"""'\''""", ['CHAR_CONST'])
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| 94 | self.assertTokensTypes(r"""'\?'""", ['CHAR_CONST'])
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| 95 | self.assertTokensTypes(r"""'\012'""", ['CHAR_CONST'])
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| 96 | self.assertTokensTypes(r"""'\x2f'""", ['CHAR_CONST'])
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| 97 | self.assertTokensTypes(r"""'\x2f12'""", ['CHAR_CONST'])
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| 98 | self.assertTokensTypes(r"""L'\xaf'""", ['WCHAR_CONST'])
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| 99 |
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| 100 | def test_string_literal(self): |
| 101 | self.assertTokensTypes('"a string"', ['STRING_LITERAL'])
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| 102 | self.assertTokensTypes('L"ing"', ['WSTRING_LITERAL'])
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| 103 | self.assertTokensTypes(
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| 104 | '"i am a string too \t"',
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| 105 | ['STRING_LITERAL'])
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| 106 | self.assertTokensTypes(
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| 107 | r'''"esc\ape \"\'\? \0234 chars \rule"''',
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| 108 | ['STRING_LITERAL'])
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| 109 | self.assertTokensTypes(
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| 110 | r'''"hello 'joe' wanna give it a \"go\"?"''',
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| 111 | ['STRING_LITERAL'])
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| 112 |
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| 113 | def test_mess(self): |
| 114 | self.assertTokensTypes(
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| 115 | r'[{}]()',
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| 116 | ['LBRACKET',
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| 117 | 'LBRACE', 'RBRACE',
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| 118 | 'RBRACKET',
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| 119 | 'LPAREN', 'RPAREN'])
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| 120 |
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| 121 | self.assertTokensTypes(
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| 122 | r'()||!C&~Z?J',
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| 123 | ['LPAREN', 'RPAREN',
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| 124 | 'LOR',
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| 125 | 'LNOT', 'ID',
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| 126 | 'AND',
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| 127 | 'NOT', 'ID',
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| 128 | 'CONDOP', 'ID'])
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| 129 |
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| 130 | self.assertTokensTypes(
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| 131 | r'+-*/%|||&&&^><>=<===!=',
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| 132 | ['PLUS', 'MINUS', 'TIMES', 'DIVIDE', 'MOD',
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| 133 | 'LOR', 'OR',
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| 134 | 'LAND', 'AND',
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| 135 | 'XOR',
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| 136 | 'GT', 'LT', 'GE', 'LE', 'EQ', 'NE'])
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| 137 |
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| 138 | self.assertTokensTypes(
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| 139 | r'++--->?.,;:',
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| 140 | ['PLUSPLUS', 'MINUSMINUS',
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| 141 | 'ARROW', 'CONDOP',
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| 142 | 'PERIOD', 'COMMA', 'SEMI', 'COLON'])
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| 143 |
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| 144 | def test_exprs(self):
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| 145 | self.assertTokensTypes(
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| 146 | 'bb-cc',
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| 147 | ['ID', 'MINUS', 'ID'])
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| 148 |
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| 149 | self.assertTokensTypes(
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| 150 | 'foo & 0xFF',
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| 151 | ['ID', 'AND', 'INT_CONST_HEX'])
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| 152 | |
| 153 | self.assertTokensTypes(
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| 154 | '(2+k) * 62',
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| 155 | ['LPAREN', 'INT_CONST_DEC', 'PLUS', 'ID',
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| 156 | 'RPAREN', 'TIMES', 'INT_CONST_DEC'],)
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| 157 |
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| 158 | self.assertTokensTypes(
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| 159 | 'x | y >> z',
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| 160 | ['ID', 'OR', 'ID', 'RSHIFT', 'ID'])
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| 161 |
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| 162 | self.assertTokensTypes(
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| 163 | 'x <<= z << 5',
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| 164 | ['ID', 'LSHIFTEQUAL', 'ID', 'LSHIFT', 'INT_CONST_DEC'])
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| 165 |
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| 166 | self.assertTokensTypes(
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| 167 | 'x = y > 0 ? y : -6',
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| 168 | ['ID', 'EQUALS',
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| 169 | 'ID', 'GT', 'INT_CONST_OCT',
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| 170 | 'CONDOP',
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| 171 | 'ID',
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| 172 | 'COLON',
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| 173 | 'MINUS', 'INT_CONST_DEC'])
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| 174 |
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| 175 | self.assertTokensTypes(
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| 176 | 'a+++b',
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| 177 | ['ID', 'PLUSPLUS', 'PLUS', 'ID'])
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| 178 |
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| 179 | def test_statements(self): |
| 180 | self.assertTokensTypes(
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| 181 | 'for (int i = 0; i < n; ++i)',
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| 182 | ['FOR', 'LPAREN',
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| 183 | 'INT', 'ID', 'EQUALS', 'INT_CONST_OCT', 'SEMI',
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| 184 | 'ID', 'LT', 'ID', 'SEMI',
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| 185 | 'PLUSPLUS', 'ID',
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| 186 | 'RPAREN'])
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| 187 |
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| 188 | self.assertTokensTypes(
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| 189 | 'self: goto self;',
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| 190 | ['ID', 'COLON', 'GOTO', 'ID', 'SEMI'])
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| 191 |
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| 192 | self.assertTokensTypes(
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| 193 | """ switch (typ)
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| 194 | {
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| 195 | case TYPE_ID:
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| 196 | m = 5;
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| 197 | break;
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| 198 | default:
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| 199 | m = 8;
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| 200 | }""",
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| 201 | ['SWITCH', 'LPAREN', 'ID', 'RPAREN',
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| 202 | 'LBRACE',
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| 203 | 'CASE', 'ID', 'COLON',
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| 204 | 'ID', 'EQUALS', 'INT_CONST_DEC', 'SEMI',
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| 205 | 'BREAK', 'SEMI',
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| 206 | 'DEFAULT', 'COLON',
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| 207 | 'ID', 'EQUALS', 'INT_CONST_DEC', 'SEMI',
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| 208 | 'RBRACE'])
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| 209 |
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| 210 | def test_preprocessor(self):
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| 211 | self.assertTokensTypes('#abracadabra', ['PPHASH', 'ID'])
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| 212 |
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| 213 | str = r"""
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| 214 | 546
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| 215 | #line 66 "kwas\df.h"
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| 216 | id 4
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| 217 | dsf
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| 218 | # 9
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| 219 | armo
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| 220 | """
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| 221 |
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| 222 | #~ self.clex.filename
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| 223 | self.clex.input(str)
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| 224 | self.clex.reset_lineno()
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| 225 |
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| 226 | t1 = self.clex.token()
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| 227 | self.assertEqual(t1.type, 'INT_CONST_DEC')
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| 228 | self.assertEqual(t1.lineno, 2)
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| 229 |
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| 230 | t2 = self.clex.token()
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| 231 | self.assertEqual(t2.type, 'ID')
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| 232 | self.assertEqual(t2.value, 'id')
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| 233 | self.assertEqual(t2.lineno, 66)
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| 234 | self.assertEqual(self.clex.filename, r'kwas\df.h')
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| 235 |
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| 236 | for i in range(3):
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| 237 | t = self.clex.token()
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| 238 |
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| 239 | self.assertEqual(t.type, 'ID')
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| 240 | self.assertEqual(t.value, 'armo')
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| 241 | self.assertEqual(t.lineno, 9)
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| 242 | self.assertEqual(self.clex.filename, r'kwas\df.h')
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| 243 |
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| 244 |
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| 245 |
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| 246 | # Keeps all the errors the lexer spits in one place, to allow
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| 247 | # easier modification if the error syntax changes.
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| 248 | #
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| 249 | ERR_ILLEGAL_CHAR = 'Illegal character'
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| 250 | ERR_OCTAL = 'Invalid octal constant'
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| 251 | ERR_UNMATCHED_QUOTE = 'Unmatched \''
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| 252 | ERR_INVALID_CCONST = 'Invalid char constant'
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| 253 | ERR_STRING_ESCAPE = 'String contains invalid escape'
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| 254 |
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| 255 | ERR_FILENAME_BEFORE_LINE = 'filename before line'
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| 256 | ERR_LINENUM_MISSING = 'line number missing'
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| 257 | ERR_INVALID_LINE_DIRECTIVE = 'invalid #line directive'
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| 258 |
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| 259 |
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| 260 | class TestCLexerErrors(unittest.TestCase):
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| 261 | """ Test lexing of erroneous strings.
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| 262 | Works by passing an error functions that saves the error
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| 263 | in an attribute for later perusal.
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| 264 | """
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| 265 | def error_func(self, msg, line, column):
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| 266 | self.error = msg
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| 267 |
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| 268 | def type_lookup_func(self, typ):
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| 269 | return False
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| 270 |
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| 271 | def setUp(self):
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| 272 | self.clex = CLexer(self.error_func, self.type_lookup_func)
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| 273 | self.clex.build(optimize=False)
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| 274 | self.error = ""
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| 275 |
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| 276 | def assertLexerError(self, str, error_like):
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| 277 | # feed the string to the lexer |
| 278 | self.clex.input(str)
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| 279 |
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| 280 | # Pulls all tokens from the string. Errors will
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| 281 | # be written into self.error by the error_func
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| 282 | # callback
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| 283 | #
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| 284 | token_types(self.clex)
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| 285 |
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| 286 | # compare the error to the expected
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| 287 | self.failUnless(re.search(error_like, self.error),
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| 288 | "\nExpected error matching: %s\nGot: %s" %
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| 289 | (error_like, self.error))
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| 290 |
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| 291 | # clear last error, for the sake of subsequent invocations
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| 292 | self.error = ""
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| 293 |
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| 294 | def test_trivial_tokens(self):
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| 295 | self.assertLexerError('@', ERR_ILLEGAL_CHAR) |
| 296 | self.assertLexerError('$', ERR_ILLEGAL_CHAR)
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| 297 | self.assertLexerError('`', ERR_ILLEGAL_CHAR)
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| 298 | self.assertLexerError('\\', ERR_ILLEGAL_CHAR)
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| 299 |
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| 300 | def test_integer_constants(self): |
| 301 | self.assertLexerError('029', ERR_OCTAL)
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| 302 | self.assertLexerError('012345678', ERR_OCTAL)
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| 303 |
|
| 304 | def test_char_constants(self): |
| 305 | self.assertLexerError("'", ERR_UNMATCHED_QUOTE)
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| 306 | self.assertLexerError("'b\n", ERR_UNMATCHED_QUOTE)
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| 307 |
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| 308 | self.assertLexerError("'jx'", ERR_INVALID_CCONST)
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| 309 | self.assertLexerError("'\*'", ERR_INVALID_CCONST)
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| 310 | self.assertLexerError("'\9'", ERR_INVALID_CCONST)
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| 311 | self.assertLexerError("L'\9'", ERR_INVALID_CCONST)
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| 312 |
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| 313 | def test_string_literals(self): |
| 314 | self.assertLexerError('"jx\9"', ERR_STRING_ESCAPE)
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| 315 | self.assertLexerError('"hekllo\* on ix"', ERR_STRING_ESCAPE)
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| 316 | self.assertLexerError('L"hekllo\* on ix"', ERR_STRING_ESCAPE)
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| 317 |
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| 318 | def test_preprocessor(self): |
| 319 | self.assertLexerError('#line "ka"', ERR_FILENAME_BEFORE_LINE)
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| 320 | self.assertLexerError('#line df', ERR_INVALID_LINE_DIRECTIVE)
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| 321 | self.assertLexerError('#line \n', ERR_LINENUM_MISSING)
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| 322 |
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| 323 |
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| 324 | if __name__ == '__main__':
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| 325 | unittest.main()
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| 326 | |
| 327 |
|