Mercurial > cpython-lru_cache-weakref

annotate Lib/test/test_parser.py @ 14984:ece6c19edcc1 legacy-trunk

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Remove some debugging prints.
author Greg Ward <gward@python.net>
date Tue, 03 Oct 2000 03:32:37 +0000
parents b5fb175ad528
children 34058af976ce
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1 import os.path
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2 import parser
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3 import pprint
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4 import sys
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5
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6 from parser import expr, suite, sequence2ast
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7 from test_support import verbose
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8
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9 #
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10 # First, we test that we can generate trees from valid source fragments,
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11 # and that these valid trees are indeed allowed by the tree-loading side
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12 # of the parser module.
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13 #
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14
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15 def roundtrip(f, s):
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16 st1 = f(s)
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17 t = st1.totuple()
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18 st2 = parser.sequence2ast(t)
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19
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20 def roundtrip_fromfile(filename):
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21 roundtrip(suite, open(filename).read())
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22
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23 def test_expr(s):
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24 print "expr:", s
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25 roundtrip(expr, s)
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26
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27 def test_suite(s):
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28 print "suite:", s
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29 roundtrip(suite, s)
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30
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31
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32 print "Expressions:"
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33
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34 test_expr("foo(1)")
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35 test_expr("[1, 2, 3]")
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36 test_expr("[x**3 for x in range(20)]")
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37 test_expr("[x**3 for x in range(20) if x % 3]")
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38 test_expr("foo(*args)")
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39 test_expr("foo(*args, **kw)")
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40 test_expr("foo(**kw)")
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41 test_expr("foo(key=value)")
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42 test_expr("foo(key=value, *args)")
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43 test_expr("foo(key=value, *args, **kw)")
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44 test_expr("foo(key=value, **kw)")
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45 test_expr("foo(a, b, c, *args)")
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46 test_expr("foo(a, b, c, *args, **kw)")
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47 test_expr("foo(a, b, c, **kw)")
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48 test_expr("foo + bar")
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49
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50 print
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51 print "Statements:"
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52 test_suite("print")
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53 test_suite("print 1")
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54 test_suite("print 1,")
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55 test_suite("print >>fp")
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56 test_suite("print >>fp, 1")
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57 test_suite("print >>fp, 1,")
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58
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59 # expr_stmt
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60 test_suite("a")
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61 test_suite("a = b")
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62 test_suite("a = b = c = d = e")
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63 test_suite("a += b")
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64 test_suite("a -= b")
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65 test_suite("a *= b")
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66 test_suite("a /= b")
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67 test_suite("a %= b")
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68 test_suite("a &= b")
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69 test_suite("a |= b")
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70 test_suite("a ^= b")
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71 test_suite("a <<= b")
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72 test_suite("a >>= b")
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73 test_suite("a **= b")
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74
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75 #d = os.path.dirname(os.__file__)
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76 #roundtrip_fromfile(os.path.join(d, "os.py"))
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77 #roundtrip_fromfile(os.path.join(d, "test", "test_parser.py"))
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78
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79 #
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80 # Second, we take *invalid* trees and make sure we get ParserError
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81 # rejections for them.
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82 #
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83
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84 print
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85 print "Invalid parse trees:"
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86
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87 def check_bad_tree(tree, label):
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88 print
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89 print label
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90 try:
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91 sequence2ast(tree)
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92 except parser.ParserError:
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93 print "caught expected exception for invalid tree"
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94 pass
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95 else:
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96 print "test failed: did not properly detect invalid tree:"
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97 pprint.pprint(tree)
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98
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99
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100 # not even remotely valid:
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101 check_bad_tree((1, 2, 3), "<junk>")
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102
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103 # print >>fp,
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104 tree = \
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105 (257,
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106 (264,
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107 (265,
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108 (266,
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109 (268,
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110 (1, 'print'),
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111 (35, '>>'),
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112 (290,
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113 (291,
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114 (292,
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115 (293,
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116 (295,
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117 (296,
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118 (297,
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119 (298, (299, (300, (301, (302, (303, (1, 'fp')))))))))))))),
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120 (12, ','))),
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121 (4, ''))),
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122 (0, ''))
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123
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124 check_bad_tree(tree, "print >>fp,")
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125
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126 # a,,c
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127 tree = \
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128 (258,
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129 (311,
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130 (290,
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131 (291,
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132 (292,
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133 (293,
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134 (295,
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135 (296, (297, (298, (299, (300, (301, (302, (303, (1, 'a')))))))))))))),
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136 (12, ','),
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137 (12, ','),
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138 (290,
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139 (291,
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140 (292,
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141 (293,
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142 (295,
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143 (296, (297, (298, (299, (300, (301, (302, (303, (1, 'c'))))))))))))))),
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144 (4, ''),
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145 (0, ''))
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146
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147 check_bad_tree(tree, "a,,c")
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148
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149 # a $= b
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150 tree = \
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151 (257,
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152 (264,
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153 (265,
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154 (266,
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155 (267,
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156 (312,
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157 (291,
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158 (292,
b5fb175ad528 Update the parser module to support augmented assignment.
Fred Drake <fdrake@acm.org>
parents: 14111
diff changeset
159 (293,
b5fb175ad528 Update the parser module to support augmented assignment.
Fred Drake <fdrake@acm.org>
parents: 14111
diff changeset
160 (294,
b5fb175ad528 Update the parser module to support augmented assignment.
Fred Drake <fdrake@acm.org>
parents: 14111
diff changeset
161 (296,
b5fb175ad528 Update the parser module to support augmented assignment.
Fred Drake <fdrake@acm.org>
parents: 14111
diff changeset
162 (297,
b5fb175ad528 Update the parser module to support augmented assignment.
Fred Drake <fdrake@acm.org>
parents: 14111
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163 (298,
b5fb175ad528 Update the parser module to support augmented assignment.
Fred Drake <fdrake@acm.org>
parents: 14111
diff changeset
164 (299, (300, (301, (302, (303, (304, (1, 'a'))))))))))))))),
b5fb175ad528 Update the parser module to support augmented assignment.
Fred Drake <fdrake@acm.org>
parents: 14111
diff changeset
165 (268, (37, '$=')),
b5fb175ad528 Update the parser module to support augmented assignment.
Fred Drake <fdrake@acm.org>
parents: 14111
diff changeset
166 (312,
b5fb175ad528 Update the parser module to support augmented assignment.
Fred Drake <fdrake@acm.org>
parents: 14111
diff changeset
167 (291,
b5fb175ad528 Update the parser module to support augmented assignment.
Fred Drake <fdrake@acm.org>
parents: 14111
diff changeset
168 (292,
b5fb175ad528 Update the parser module to support augmented assignment.
Fred Drake <fdrake@acm.org>
parents: 14111
diff changeset
169 (293,
b5fb175ad528 Update the parser module to support augmented assignment.
Fred Drake <fdrake@acm.org>
parents: 14111
diff changeset
170 (294,
b5fb175ad528 Update the parser module to support augmented assignment.
Fred Drake <fdrake@acm.org>
parents: 14111
diff changeset
171 (296,
b5fb175ad528 Update the parser module to support augmented assignment.
Fred Drake <fdrake@acm.org>
parents: 14111
diff changeset
172 (297,
b5fb175ad528 Update the parser module to support augmented assignment.
Fred Drake <fdrake@acm.org>
parents: 14111
diff changeset
173 (298,
b5fb175ad528 Update the parser module to support augmented assignment.
Fred Drake <fdrake@acm.org>
parents: 14111
diff changeset
174 (299, (300, (301, (302, (303, (304, (1, 'b'))))))))))))))))),
b5fb175ad528 Update the parser module to support augmented assignment.
Fred Drake <fdrake@acm.org>
parents: 14111
diff changeset
175 (4, ''))),
b5fb175ad528 Update the parser module to support augmented assignment.
Fred Drake <fdrake@acm.org>
parents: 14111
diff changeset
176 (0, ''))
b5fb175ad528 Update the parser module to support augmented assignment.
Fred Drake <fdrake@acm.org>
parents: 14111
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177
b5fb175ad528 Update the parser module to support augmented assignment.
Fred Drake <fdrake@acm.org>
parents: 14111
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178 check_bad_tree(tree, "a $= b")