| 1 | import parser
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| 2 | import unittest
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| 3 | from test import test_support
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| 4 |
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| 5 | #
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| 6 | # First, we test that we can generate trees from valid source fragments,
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| 7 | # and that these valid trees are indeed allowed by the tree-loading side
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| 8 | # of the parser module.
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| 9 | #
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| 10 |
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| 11 | class RoundtripLegalSyntaxTestCase(unittest.TestCase):
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| 12 |
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| 13 | def roundtrip(self, f, s):
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| 14 | st1 = f(s)
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| 15 | t = st1.totuple()
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| 16 | try:
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| 17 | st2 = parser.sequence2st(t)
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| 18 | except parser.ParserError, why:
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| 19 | self.fail("could not roundtrip %r: %s" % (s, why))
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| 20 |
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| 21 | self.assertEquals(t, st2.totuple(),
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| 22 | "could not re-generate syntax tree")
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| 23 |
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| 24 | def check_expr(self, s):
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| 25 | self.roundtrip(parser.expr, s)
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| 26 |
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| 27 | def check_suite(self, s):
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| 28 | self.roundtrip(parser.suite, s)
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| 29 |
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| 30 | def test_yield_statement(self):
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| 31 | self.check_suite("def f(): yield 1")
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| 32 | self.check_suite("def f(): yield")
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| 33 | self.check_suite("def f(): x += yield")
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| 34 | self.check_suite("def f(): x = yield 1")
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| 35 | self.check_suite("def f(): x = y = yield 1")
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| 36 | self.check_suite("def f(): x = yield")
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| 37 | self.check_suite("def f(): x = y = yield")
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| 38 | self.check_suite("def f(): 1 + (yield)*2")
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| 39 | self.check_suite("def f(): (yield 1)*2")
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| 40 | self.check_suite("def f(): return; yield 1")
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| 41 | self.check_suite("def f(): yield 1; return")
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| 42 | self.check_suite("def f():\n"
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| 43 | " for x in range(30):\n"
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| 44 | " yield x\n")
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| 45 | self.check_suite("def f():\n"
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| 46 | " if (yield):\n"
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| 47 | " yield x\n")
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| 48 |
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| 49 | def test_expressions(self):
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| 50 | self.check_expr("foo(1)")
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| 51 | self.check_expr("[1, 2, 3]")
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| 52 | self.check_expr("[x**3 for x in range(20)]")
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| 53 | self.check_expr("[x**3 for x in range(20) if x % 3]")
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| 54 | self.check_expr("[x**3 for x in range(20) if x % 2 if x % 3]")
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| 55 | self.check_expr("list(x**3 for x in range(20))")
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| 56 | self.check_expr("list(x**3 for x in range(20) if x % 3)")
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| 57 | self.check_expr("list(x**3 for x in range(20) if x % 2 if x % 3)")
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| 58 | self.check_expr("foo(*args)")
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| 59 | self.check_expr("foo(*args, **kw)")
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| 60 | self.check_expr("foo(**kw)")
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| 61 | self.check_expr("foo(key=value)")
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| 62 | self.check_expr("foo(key=value, *args)")
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| 63 | self.check_expr("foo(key=value, *args, **kw)")
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| 64 | self.check_expr("foo(key=value, **kw)")
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| 65 | self.check_expr("foo(a, b, c, *args)")
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| 66 | self.check_expr("foo(a, b, c, *args, **kw)")
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| 67 | self.check_expr("foo(a, b, c, **kw)")
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| 68 | self.check_expr("foo + bar")
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| 69 | self.check_expr("foo - bar")
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| 70 | self.check_expr("foo * bar")
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| 71 | self.check_expr("foo / bar")
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| 72 | self.check_expr("foo // bar")
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| 73 | self.check_expr("lambda: 0")
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| 74 | self.check_expr("lambda x: 0")
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| 75 | self.check_expr("lambda *y: 0")
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| 76 | self.check_expr("lambda *y, **z: 0")
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| 77 | self.check_expr("lambda **z: 0")
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| 78 | self.check_expr("lambda x, y: 0")
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| 79 | self.check_expr("lambda foo=bar: 0")
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| 80 | self.check_expr("lambda foo=bar, spaz=nifty+spit: 0")
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| 81 | self.check_expr("lambda foo=bar, **z: 0")
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| 82 | self.check_expr("lambda foo=bar, blaz=blat+2, **z: 0")
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| 83 | self.check_expr("lambda foo=bar, blaz=blat+2, *y, **z: 0")
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| 84 | self.check_expr("lambda x, *y, **z: 0")
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| 85 | self.check_expr("(x for x in range(10))")
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| 86 | self.check_expr("foo(x for x in range(10))")
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| 87 |
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| 88 | def test_print(self):
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| 89 | self.check_suite("print")
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| 90 | self.check_suite("print 1")
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| 91 | self.check_suite("print 1,")
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| 92 | self.check_suite("print >>fp")
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| 93 | self.check_suite("print >>fp, 1")
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| 94 | self.check_suite("print >>fp, 1,")
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| 95 |
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| 96 | def test_simple_expression(self):
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| 97 | # expr_stmt
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| 98 | self.check_suite("a")
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| 99 |
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| 100 | def test_simple_assignments(self):
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| 101 | self.check_suite("a = b")
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| 102 | self.check_suite("a = b = c = d = e")
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| 103 |
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| 104 | def test_simple_augmented_assignments(self):
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| 105 | self.check_suite("a += b")
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| 106 | self.check_suite("a -= b")
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| 107 | self.check_suite("a *= b")
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| 108 | self.check_suite("a /= b")
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| 109 | self.check_suite("a //= b")
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| 110 | self.check_suite("a %= b")
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| 111 | self.check_suite("a &= b")
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| 112 | self.check_suite("a |= b")
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| 113 | self.check_suite("a ^= b")
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| 114 | self.check_suite("a <<= b")
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| 115 | self.check_suite("a >>= b")
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| 116 | self.check_suite("a **= b")
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| 117 |
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| 118 | def test_function_defs(self):
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| 119 | self.check_suite("def f(): pass")
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| 120 | self.check_suite("def f(*args): pass")
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| 121 | self.check_suite("def f(*args, **kw): pass")
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| 122 | self.check_suite("def f(**kw): pass")
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| 123 | self.check_suite("def f(foo=bar): pass")
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| 124 | self.check_suite("def f(foo=bar, *args): pass")
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| 125 | self.check_suite("def f(foo=bar, *args, **kw): pass")
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| 126 | self.check_suite("def f(foo=bar, **kw): pass")
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| 127 |
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| 128 | self.check_suite("def f(a, b): pass")
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| 129 | self.check_suite("def f(a, b, *args): pass")
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| 130 | self.check_suite("def f(a, b, *args, **kw): pass")
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| 131 | self.check_suite("def f(a, b, **kw): pass")
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| 132 | self.check_suite("def f(a, b, foo=bar): pass")
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| 133 | self.check_suite("def f(a, b, foo=bar, *args): pass")
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| 134 | self.check_suite("def f(a, b, foo=bar, *args, **kw): pass")
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| 135 | self.check_suite("def f(a, b, foo=bar, **kw): pass")
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| 136 |
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| 137 | self.check_suite("@staticmethod\n"
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| 138 | "def f(): pass")
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| 139 | self.check_suite("@staticmethod\n"
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| 140 | "@funcattrs(x, y)\n"
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| 141 | "def f(): pass")
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| 142 | self.check_suite("@funcattrs()\n"
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| 143 | "def f(): pass")
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| 144 |
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| 145 | def test_class_defs(self):
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| 146 | self.check_suite("class foo():pass")
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| 147 |
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| 148 | def test_import_from_statement(self):
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| 149 | self.check_suite("from sys.path import *")
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| 150 | self.check_suite("from sys.path import dirname")
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| 151 | self.check_suite("from sys.path import (dirname)")
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| 152 | self.check_suite("from sys.path import (dirname,)")
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| 153 | self.check_suite("from sys.path import dirname as my_dirname")
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| 154 | self.check_suite("from sys.path import (dirname as my_dirname)")
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| 155 | self.check_suite("from sys.path import (dirname as my_dirname,)")
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| 156 | self.check_suite("from sys.path import dirname, basename")
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| 157 | self.check_suite("from sys.path import (dirname, basename)")
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| 158 | self.check_suite("from sys.path import (dirname, basename,)")
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| 159 | self.check_suite(
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| 160 | "from sys.path import dirname as my_dirname, basename")
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| 161 | self.check_suite(
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| 162 | "from sys.path import (dirname as my_dirname, basename)")
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| 163 | self.check_suite(
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| 164 | "from sys.path import (dirname as my_dirname, basename,)")
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| 165 | self.check_suite(
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| 166 | "from sys.path import dirname, basename as my_basename")
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| 167 | self.check_suite(
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| 168 | "from sys.path import (dirname, basename as my_basename)")
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| 169 | self.check_suite(
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| 170 | "from sys.path import (dirname, basename as my_basename,)")
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| 171 |
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| 172 | def test_basic_import_statement(self):
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| 173 | self.check_suite("import sys")
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| 174 | self.check_suite("import sys as system")
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| 175 | self.check_suite("import sys, math")
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| 176 | self.check_suite("import sys as system, math")
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| 177 | self.check_suite("import sys, math as my_math")
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| 178 |
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| 179 | def test_pep263(self):
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| 180 | self.check_suite("# -*- coding: iso-8859-1 -*-\n"
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| 181 | "pass\n")
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| 182 |
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| 183 | def test_assert(self):
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| 184 | self.check_suite("assert alo < ahi and blo < bhi\n")
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| 185 |
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| 186 | #
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| 187 | # Second, we take *invalid* trees and make sure we get ParserError
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| 188 | # rejections for them.
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| 189 | #
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| 190 |
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| 191 | class IllegalSyntaxTestCase(unittest.TestCase):
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| 192 |
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| 193 | def check_bad_tree(self, tree, label):
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| 194 | try:
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| 195 | parser.sequence2st(tree)
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| 196 | except parser.ParserError:
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| 197 | pass
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| 198 | else:
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| 199 | self.fail("did not detect invalid tree for %r" % label)
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| 200 |
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| 201 | def test_junk(self):
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| 202 | # not even remotely valid:
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| 203 | self.check_bad_tree((1, 2, 3), "<junk>")
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| 204 |
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| 205 | def test_illegal_yield_1(self):
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| 206 | # Illegal yield statement: def f(): return 1; yield 1
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| 207 | tree = \
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| 208 | (257,
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| 209 | (264,
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| 210 | (285,
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| 211 | (259,
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| 212 | (1, 'def'),
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| 213 | (1, 'f'),
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| 214 | (260, (7, '('), (8, ')')),
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| 215 | (11, ':'),
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| 216 | (291,
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| 217 | (4, ''),
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| 218 | (5, ''),
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| 219 | (264,
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| 220 | (265,
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| 221 | (266,
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| 222 | (272,
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| 223 | (275,
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| 224 | (1, 'return'),
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| 225 | (313,
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| 226 | (292,
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| 227 | (293,
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| 228 | (294,
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| 229 | (295,
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| 230 | (297,
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| 231 | (298,
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| 232 | (299,
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| 233 | (300,
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| 234 | (301,
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| 235 | (302, (303, (304, (305, (2, '1')))))))))))))))))),
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| 236 | (264,
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| 237 | (265,
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| 238 | (266,
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| 239 | (272,
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| 240 | (276,
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| 241 | (1, 'yield'),
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| 242 | (313,
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| 243 | (292,
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| 244 | (293,
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| 245 | (294,
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| 246 | (295,
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| 247 | (297,
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| 248 | (298,
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| 249 | (299,
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| 250 | (300,
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| 251 | (301,
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| 252 | (302,
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| 253 | (303, (304, (305, (2, '1')))))))))))))))))),
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| 254 | (4, ''))),
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| 255 | (6, ''))))),
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| 256 | (4, ''),
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| 257 | (0, ''))))
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| 258 | self.check_bad_tree(tree, "def f():\n return 1\n yield 1")
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| 259 |
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| 260 | def test_illegal_yield_2(self):
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| 261 | # Illegal return in generator: def f(): return 1; yield 1
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| 262 | tree = \
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| 263 | (257,
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| 264 | (264,
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| 265 | (265,
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| 266 | (266,
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| 267 | (278,
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| 268 | (1, 'from'),
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| 269 | (281, (1, '__future__')),
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| 270 | (1, 'import'),
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| 271 | (279, (1, 'generators')))),
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| 272 | (4, ''))),
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| 273 | (264,
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| 274 | (285,
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| 275 | (259,
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| 276 | (1, 'def'),
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| 277 | (1, 'f'),
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| 278 | (260, (7, '('), (8, ')')),
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| 279 | (11, ':'),
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| 280 | (291,
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| 281 | (4, ''),
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| 282 | (5, ''),
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| 283 | (264,
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| 284 | (265,
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| 285 | (266,
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| 286 | (272,
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| 287 | (275,
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| 288 | (1, 'return'),
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| 289 | (313,
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| 290 | (292,
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| 291 | (293,
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| 292 | (294,
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| 293 | (295,
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| 294 | (297,
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| 295 | (298,
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| 296 | (299,
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| 297 | (300,
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| 298 | (301,
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| 299 | (302, (303, (304, (305, (2, '1')))))))))))))))))),
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| 300 | (264,
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| 301 | (265,
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| 302 | (266,
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| 303 | (272,
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| 304 | (276,
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| 305 | (1, 'yield'),
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| 306 | (313,
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| 307 | (292,
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| 308 | (293,
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| 309 | (294,
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| 310 | (295,
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| 311 | (297,
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| 312 | (298,
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| 313 | (299,
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| 314 | (300,
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| 315 | (301,
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| 316 | (302,
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| 317 | (303, (304, (305, (2, '1')))))))))))))))))),
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| 318 | (4, ''))),
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| 319 | (6, ''))))),
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| 320 | (4, ''),
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| 321 | (0, ''))))
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| 322 | self.check_bad_tree(tree, "def f():\n return 1\n yield 1")
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| 323 |
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| 324 | def test_print_chevron_comma(self):
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| 325 | # Illegal input: print >>fp,
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| 326 | tree = \
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| 327 | (257,
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| 328 | (264,
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| 329 | (265,
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| 330 | (266,
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| 331 | (268,
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| 332 | (1, 'print'),
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| 333 | (35, '>>'),
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| 334 | (290,
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| 335 | (291,
|
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| 336 | (292,
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| 337 | (293,
|
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| 338 | (295,
|
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| 339 | (296,
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| 340 | (297,
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| 341 | (298, (299, (300, (301, (302, (303, (1, 'fp')))))))))))))),
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| 342 | (12, ','))),
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| 343 | (4, ''))),
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| 344 | (0, ''))
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| 345 | self.check_bad_tree(tree, "print >>fp,")
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| 346 |
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| 347 | def test_a_comma_comma_c(self):
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| 348 | # Illegal input: a,,c
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| 349 | tree = \
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| 350 | (258,
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| 351 | (311,
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| 352 | (290,
|
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| 353 | (291,
|
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| 354 | (292,
|
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| 355 | (293,
|
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| 356 | (295,
|
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| 357 | (296,
|
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| 358 | (297,
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| 359 | (298, (299, (300, (301, (302, (303, (1, 'a')))))))))))))),
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| 360 | (12, ','),
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| 361 | (12, ','),
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| 362 | (290,
|
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| 363 | (291,
|
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| 364 | (292,
|
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| 365 | (293,
|
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| 366 | (295,
|
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| 367 | (296,
|
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| 368 | (297,
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| 369 | (298, (299, (300, (301, (302, (303, (1, 'c'))))))))))))))),
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| 370 | (4, ''),
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| 371 | (0, ''))
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| 372 | self.check_bad_tree(tree, "a,,c")
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| 373 |
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| 374 | def test_illegal_operator(self):
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| 375 | # Illegal input: a $= b
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| 376 | tree = \
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| 377 | (257,
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| 378 | (264,
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| 379 | (265,
|
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| 380 | (266,
|
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| 381 | (267,
|
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| 382 | (312,
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| 383 | (291,
|
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| 384 | (292,
|
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| 385 | (293,
|
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| 386 | (294,
|
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| 387 | (296,
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| 388 | (297,
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| 389 | (298,
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| 390 | (299,
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| 391 | (300, (301, (302, (303, (304, (1, 'a'))))))))))))))),
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| 392 | (268, (37, '$=')),
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| 393 | (312,
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| 394 | (291,
|
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| 395 | (292,
|
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| 396 | (293,
|
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| 397 | (294,
|
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| 398 | (296,
|
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| 399 | (297,
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| 400 | (298,
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| 401 | (299,
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| 402 | (300, (301, (302, (303, (304, (1, 'b'))))))))))))))))),
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| 403 | (4, ''))),
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| 404 | (0, ''))
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| 405 | self.check_bad_tree(tree, "a $= b")
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| 406 |
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| 407 | def test_malformed_global(self):
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| 408 | #doesn't have global keyword in ast
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| 409 | tree = (257,
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| 410 | (264,
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| 411 | (265,
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| 412 | (266,
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| 413 | (282, (1, 'foo'))), (4, ''))),
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| 414 | (4, ''),
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| 415 | (0, ''))
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| 416 | self.check_bad_tree(tree, "malformed global ast")
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| 417 |
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| 418 |
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| 419 | class CompileTestCase(unittest.TestCase):
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| 420 |
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| 421 | # These tests are very minimal. :-(
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| 422 |
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| 423 | def test_compile_expr(self):
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| 424 | st = parser.expr('2 + 3')
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| 425 | code = parser.compilest(st)
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| 426 | self.assertEquals(eval(code), 5)
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| 427 |
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| 428 | def test_compile_suite(self):
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| 429 | st = parser.suite('x = 2; y = x + 3')
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| 430 | code = parser.compilest(st)
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| 431 | globs = {}
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| 432 | exec code in globs
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| 433 | self.assertEquals(globs['y'], 5)
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| 434 |
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| 435 | def test_compile_error(self):
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| 436 | st = parser.suite('1 = 3 + 4')
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| 437 | self.assertRaises(SyntaxError, parser.compilest, st)
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| 438 |
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| 439 | def test_main():
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| 440 | test_support.run_unittest(
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| 441 | RoundtripLegalSyntaxTestCase,
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| 442 | IllegalSyntaxTestCase,
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| 443 | CompileTestCase,
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| 444 | )
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| 445 |
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| 446 |
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| 447 | if __name__ == "__main__":
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| 448 | test_main()
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