mirror of https://github.com/python/cpython
1047 lines
38 KiB
Python
1047 lines
38 KiB
Python
import copy
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import warnings
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with warnings.catch_warnings():
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warnings.filterwarnings('ignore', 'The parser module is deprecated',
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DeprecationWarning)
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import parser
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import pickle
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import unittest
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import operator
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import struct
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from test import support
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from test.support.script_helper import assert_python_failure
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from test.support.script_helper import assert_python_ok
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#
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# First, we test that we can generate trees from valid source fragments,
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# and that these valid trees are indeed allowed by the tree-loading side
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# of the parser module.
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#
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class RoundtripLegalSyntaxTestCase(unittest.TestCase):
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def roundtrip(self, f, s):
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st1 = f(s)
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t = st1.totuple()
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try:
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st2 = parser.sequence2st(t)
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except parser.ParserError as why:
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self.fail("could not roundtrip %r: %s" % (s, why))
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self.assertEqual(t, st2.totuple(),
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"could not re-generate syntax tree")
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def check_expr(self, s):
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self.roundtrip(parser.expr, s)
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def test_flags_passed(self):
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# The unicode literals flags has to be passed from the parser to AST
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# generation.
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suite = parser.suite("from __future__ import unicode_literals; x = ''")
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code = suite.compile()
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scope = {}
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exec(code, {}, scope)
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self.assertIsInstance(scope["x"], str)
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def check_suite(self, s):
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self.roundtrip(parser.suite, s)
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def test_yield_statement(self):
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self.check_suite("def f(): yield 1")
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self.check_suite("def f(): yield")
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self.check_suite("def f(): x += yield")
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self.check_suite("def f(): x = yield 1")
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self.check_suite("def f(): x = y = yield 1")
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self.check_suite("def f(): x = yield")
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self.check_suite("def f(): x = y = yield")
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self.check_suite("def f(): 1 + (yield)*2")
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self.check_suite("def f(): (yield 1)*2")
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self.check_suite("def f(): return; yield 1")
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self.check_suite("def f(): yield 1; return")
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self.check_suite("def f(): yield from 1")
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self.check_suite("def f(): x = yield from 1")
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self.check_suite("def f(): f((yield from 1))")
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self.check_suite("def f(): yield 1; return 1")
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self.check_suite("def f():\n"
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" for x in range(30):\n"
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" yield x\n")
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self.check_suite("def f():\n"
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" if (yield):\n"
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" yield x\n")
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def test_await_statement(self):
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self.check_suite("async def f():\n await smth()")
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self.check_suite("async def f():\n foo = await smth()")
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self.check_suite("async def f():\n foo, bar = await smth()")
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self.check_suite("async def f():\n (await smth())")
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self.check_suite("async def f():\n foo((await smth()))")
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self.check_suite("async def f():\n await foo(); return 42")
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def test_async_with_statement(self):
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self.check_suite("async def f():\n async with 1: pass")
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self.check_suite("async def f():\n async with a as b, c as d: pass")
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def test_async_for_statement(self):
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self.check_suite("async def f():\n async for i in (): pass")
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self.check_suite("async def f():\n async for i, b in (): pass")
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def test_nonlocal_statement(self):
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self.check_suite("def f():\n"
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" x = 0\n"
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" def g():\n"
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" nonlocal x\n")
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self.check_suite("def f():\n"
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" x = y = 0\n"
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" def g():\n"
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" nonlocal x, y\n")
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def test_expressions(self):
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self.check_expr("foo(1)")
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self.check_expr("[1, 2, 3]")
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self.check_expr("[x**3 for x in range(20)]")
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self.check_expr("[x**3 for x in range(20) if x % 3]")
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self.check_expr("[x**3 for x in range(20) if x % 2 if x % 3]")
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self.check_expr("list(x**3 for x in range(20))")
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self.check_expr("list(x**3 for x in range(20) if x % 3)")
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self.check_expr("list(x**3 for x in range(20) if x % 2 if x % 3)")
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self.check_expr("foo(*args)")
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self.check_expr("foo(*args, **kw)")
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self.check_expr("foo(**kw)")
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self.check_expr("foo(key=value)")
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self.check_expr("foo(key=value, *args)")
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self.check_expr("foo(key=value, *args, **kw)")
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self.check_expr("foo(key=value, **kw)")
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self.check_expr("foo(a, b, c, *args)")
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self.check_expr("foo(a, b, c, *args, **kw)")
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self.check_expr("foo(a, b, c, **kw)")
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self.check_expr("foo(a, *args, keyword=23)")
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self.check_expr("foo + bar")
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self.check_expr("foo - bar")
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self.check_expr("foo * bar")
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self.check_expr("foo / bar")
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self.check_expr("foo // bar")
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self.check_expr("(foo := 1)")
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self.check_expr("lambda: 0")
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self.check_expr("lambda x: 0")
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self.check_expr("lambda *y: 0")
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self.check_expr("lambda *y, **z: 0")
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self.check_expr("lambda **z: 0")
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self.check_expr("lambda x, y: 0")
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self.check_expr("lambda foo=bar: 0")
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self.check_expr("lambda foo=bar, spaz=nifty+spit: 0")
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self.check_expr("lambda foo=bar, **z: 0")
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self.check_expr("lambda foo=bar, blaz=blat+2, **z: 0")
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self.check_expr("lambda foo=bar, blaz=blat+2, *y, **z: 0")
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self.check_expr("lambda x, *y, **z: 0")
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self.check_expr("(x for x in range(10))")
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self.check_expr("foo(x for x in range(10))")
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self.check_expr("...")
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self.check_expr("a[...]")
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def test_simple_expression(self):
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# expr_stmt
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self.check_suite("a")
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def test_simple_assignments(self):
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self.check_suite("a = b")
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self.check_suite("a = b = c = d = e")
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def test_var_annot(self):
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self.check_suite("x: int = 5")
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self.check_suite("y: List[T] = []; z: [list] = fun()")
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self.check_suite("x: tuple = (1, 2)")
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self.check_suite("d[f()]: int = 42")
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self.check_suite("f(d[x]): str = 'abc'")
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self.check_suite("x.y.z.w: complex = 42j")
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self.check_suite("x: int")
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self.check_suite("def f():\n"
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" x: str\n"
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" y: int = 5\n")
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self.check_suite("class C:\n"
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" x: str\n"
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" y: int = 5\n")
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self.check_suite("class C:\n"
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" def __init__(self, x: int) -> None:\n"
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" self.x: int = x\n")
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# double check for nonsense
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with self.assertRaises(SyntaxError):
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exec("2+2: int", {}, {})
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with self.assertRaises(SyntaxError):
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exec("[]: int = 5", {}, {})
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with self.assertRaises(SyntaxError):
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exec("x, *y, z: int = range(5)", {}, {})
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with self.assertRaises(SyntaxError):
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exec("x: int = 1, y = 2", {}, {})
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with self.assertRaises(SyntaxError):
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exec("u = v: int", {}, {})
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with self.assertRaises(SyntaxError):
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exec("False: int", {}, {})
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with self.assertRaises(SyntaxError):
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exec("x.False: int", {}, {})
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with self.assertRaises(SyntaxError):
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exec("x.y,: int", {}, {})
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with self.assertRaises(SyntaxError):
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exec("[0]: int", {}, {})
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with self.assertRaises(SyntaxError):
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exec("f(): int", {}, {})
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def test_simple_augmented_assignments(self):
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self.check_suite("a += b")
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self.check_suite("a -= b")
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self.check_suite("a *= b")
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self.check_suite("a /= b")
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self.check_suite("a //= b")
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self.check_suite("a %= b")
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self.check_suite("a &= b")
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self.check_suite("a |= b")
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self.check_suite("a ^= b")
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self.check_suite("a <<= b")
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self.check_suite("a >>= b")
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self.check_suite("a **= b")
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def test_function_defs(self):
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self.check_suite("def f(): pass")
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self.check_suite("def f(*args): pass")
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self.check_suite("def f(*args, **kw): pass")
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self.check_suite("def f(**kw): pass")
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self.check_suite("def f(foo=bar): pass")
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self.check_suite("def f(foo=bar, *args): pass")
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self.check_suite("def f(foo=bar, *args, **kw): pass")
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self.check_suite("def f(foo=bar, **kw): pass")
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self.check_suite("def f(a, b): pass")
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self.check_suite("def f(a, b, *args): pass")
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self.check_suite("def f(a, b, *args, **kw): pass")
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self.check_suite("def f(a, b, **kw): pass")
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self.check_suite("def f(a, b, foo=bar): pass")
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self.check_suite("def f(a, b, foo=bar, *args): pass")
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self.check_suite("def f(a, b, foo=bar, *args, **kw): pass")
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self.check_suite("def f(a, b, foo=bar, **kw): pass")
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self.check_suite("@staticmethod\n"
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"def f(): pass")
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self.check_suite("@staticmethod\n"
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"@funcattrs(x, y)\n"
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"def f(): pass")
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self.check_suite("@funcattrs()\n"
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"def f(): pass")
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self.check_suite("@False or x\n"
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"def f(): pass")
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self.check_suite("@d := x\n"
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"def f(): pass")
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self.check_suite("@lambda f: x(f)\n"
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"def f(): pass")
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self.check_suite("@[..., x, ...][1]\n"
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"def f(): pass")
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self.check_suite("@x(x)(x)\n"
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"def f(): pass")
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self.check_suite("@(x, x)\n"
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"def f(): pass")
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self.check_suite("@...\n"
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"def f(): pass")
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self.check_suite("@None\n"
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"def f(): pass")
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self.check_suite("@w @(x @y) @(z)\n"
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"def f(): pass")
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self.check_suite("@w[x].y.z\n"
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"def f(): pass")
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# keyword-only arguments
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self.check_suite("def f(*, a): pass")
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self.check_suite("def f(*, a = 5): pass")
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self.check_suite("def f(*, a = 5, b): pass")
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self.check_suite("def f(*, a, b = 5): pass")
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self.check_suite("def f(*, a, b = 5, **kwds): pass")
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self.check_suite("def f(*args, a): pass")
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self.check_suite("def f(*args, a = 5): pass")
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self.check_suite("def f(*args, a = 5, b): pass")
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self.check_suite("def f(*args, a, b = 5): pass")
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self.check_suite("def f(*args, a, b = 5, **kwds): pass")
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# positional-only arguments
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self.check_suite("def f(a, /): pass")
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self.check_suite("def f(a, /,): pass")
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self.check_suite("def f(a, b, /): pass")
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self.check_suite("def f(a, b, /, c): pass")
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self.check_suite("def f(a, b, /, c = 6): pass")
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self.check_suite("def f(a, b, /, c, *, d): pass")
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self.check_suite("def f(a, b, /, c = 1, *, d): pass")
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self.check_suite("def f(a, b, /, c, *, d = 1): pass")
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self.check_suite("def f(a, b=1, /, c=2, *, d = 3): pass")
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self.check_suite("def f(a=0, b=1, /, c=2, *, d = 3): pass")
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# function annotations
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self.check_suite("def f(a: int): pass")
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self.check_suite("def f(a: int = 5): pass")
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self.check_suite("def f(*args: list): pass")
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self.check_suite("def f(**kwds: dict): pass")
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self.check_suite("def f(*, a: int): pass")
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self.check_suite("def f(*, a: int = 5): pass")
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self.check_suite("def f() -> int: pass")
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def test_class_defs(self):
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self.check_suite("class foo():pass")
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self.check_suite("class foo(object):pass")
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self.check_suite("@class_decorator\n"
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"class foo():pass")
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self.check_suite("@class_decorator(arg)\n"
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"class foo():pass")
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self.check_suite("@decorator1\n"
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"@decorator2\n"
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"class foo():pass")
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self.check_suite("@False or x\n"
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"class C: pass")
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self.check_suite("@d := x\n"
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"class C: pass")
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self.check_suite("@lambda f: x(f)\n"
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"class C: pass")
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self.check_suite("@[..., x, ...][1]\n"
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"class C: pass")
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self.check_suite("@x(x)(x)\n"
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"class C: pass")
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self.check_suite("@(x, x)\n"
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"class C: pass")
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self.check_suite("@...\n"
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"class C: pass")
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self.check_suite("@None\n"
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"class C: pass")
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self.check_suite("@w @(x @y) @(z)\n"
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"class C: pass")
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self.check_suite("@w[x].y.z\n"
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"class C: pass")
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def test_import_from_statement(self):
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self.check_suite("from sys.path import *")
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self.check_suite("from sys.path import dirname")
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self.check_suite("from sys.path import (dirname)")
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self.check_suite("from sys.path import (dirname,)")
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self.check_suite("from sys.path import dirname as my_dirname")
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self.check_suite("from sys.path import (dirname as my_dirname)")
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self.check_suite("from sys.path import (dirname as my_dirname,)")
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self.check_suite("from sys.path import dirname, basename")
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self.check_suite("from sys.path import (dirname, basename)")
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self.check_suite("from sys.path import (dirname, basename,)")
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self.check_suite(
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"from sys.path import dirname as my_dirname, basename")
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self.check_suite(
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"from sys.path import (dirname as my_dirname, basename)")
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self.check_suite(
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"from sys.path import (dirname as my_dirname, basename,)")
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self.check_suite(
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"from sys.path import dirname, basename as my_basename")
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self.check_suite(
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"from sys.path import (dirname, basename as my_basename)")
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self.check_suite(
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"from sys.path import (dirname, basename as my_basename,)")
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self.check_suite("from .bogus import x")
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def test_basic_import_statement(self):
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self.check_suite("import sys")
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self.check_suite("import sys as system")
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self.check_suite("import sys, math")
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self.check_suite("import sys as system, math")
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self.check_suite("import sys, math as my_math")
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def test_relative_imports(self):
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self.check_suite("from . import name")
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self.check_suite("from .. import name")
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# check all the way up to '....', since '...' is tokenized
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# differently from '.' (it's an ellipsis token).
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self.check_suite("from ... import name")
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self.check_suite("from .... import name")
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self.check_suite("from .pkg import name")
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self.check_suite("from ..pkg import name")
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self.check_suite("from ...pkg import name")
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self.check_suite("from ....pkg import name")
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def test_pep263(self):
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self.check_suite("# -*- coding: iso-8859-1 -*-\n"
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"pass\n")
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def test_assert(self):
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self.check_suite("assert alo < ahi and blo < bhi\n")
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def test_with(self):
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self.check_suite("with open('x'): pass\n")
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self.check_suite("with open('x') as f: pass\n")
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self.check_suite("with open('x') as f, open('y') as g: pass\n")
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def test_try_stmt(self):
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self.check_suite("try: pass\nexcept: pass\n")
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self.check_suite("try: pass\nfinally: pass\n")
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self.check_suite("try: pass\nexcept A: pass\nfinally: pass\n")
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self.check_suite("try: pass\nexcept A: pass\nexcept: pass\n"
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"finally: pass\n")
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self.check_suite("try: pass\nexcept: pass\nelse: pass\n")
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self.check_suite("try: pass\nexcept: pass\nelse: pass\n"
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"finally: pass\n")
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def test_if_stmt(self):
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self.check_suite("if True:\n pass\nelse:\n pass\n")
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self.check_suite("if True:\n pass\nelif True:\n pass\nelse:\n pass\n")
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def test_position(self):
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# An absolutely minimal test of position information. Better
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# tests would be a big project.
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code = "def f(x):\n return x + 1"
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st = parser.suite(code)
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def walk(tree):
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node_type = tree[0]
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next = tree[1]
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if isinstance(next, (tuple, list)):
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for elt in tree[1:]:
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for x in walk(elt):
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yield x
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else:
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yield tree
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expected = [
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(1, 'def', 1, 0),
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(1, 'f', 1, 4),
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(7, '(', 1, 5),
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(1, 'x', 1, 6),
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(8, ')', 1, 7),
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(11, ':', 1, 8),
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(4, '', 1, 9),
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(5, '', 2, -1),
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(1, 'return', 2, 4),
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(1, 'x', 2, 11),
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(14, '+', 2, 13),
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(2, '1', 2, 15),
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(4, '', 2, 16),
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(6, '', 2, -1),
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(4, '', 2, -1),
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(0, '', 2, -1),
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]
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self.assertEqual(list(walk(st.totuple(line_info=True, col_info=True))),
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expected)
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self.assertEqual(list(walk(st.totuple())),
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[(t, n) for t, n, l, c in expected])
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self.assertEqual(list(walk(st.totuple(line_info=True))),
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[(t, n, l) for t, n, l, c in expected])
|
|
self.assertEqual(list(walk(st.totuple(col_info=True))),
|
|
[(t, n, c) for t, n, l, c in expected])
|
|
self.assertEqual(list(walk(st.tolist(line_info=True, col_info=True))),
|
|
[list(x) for x in expected])
|
|
self.assertEqual(list(walk(parser.st2tuple(st, line_info=True,
|
|
col_info=True))),
|
|
expected)
|
|
self.assertEqual(list(walk(parser.st2list(st, line_info=True,
|
|
col_info=True))),
|
|
[list(x) for x in expected])
|
|
|
|
def test_extended_unpacking(self):
|
|
self.check_suite("*a = y")
|
|
self.check_suite("x, *b, = m")
|
|
self.check_suite("[*a, *b] = y")
|
|
self.check_suite("for [*x, b] in x: pass")
|
|
|
|
def test_raise_statement(self):
|
|
self.check_suite("raise\n")
|
|
self.check_suite("raise e\n")
|
|
self.check_suite("try:\n"
|
|
" suite\n"
|
|
"except Exception as e:\n"
|
|
" raise ValueError from e\n")
|
|
|
|
def test_list_displays(self):
|
|
self.check_expr('[]')
|
|
self.check_expr('[*{2}, 3, *[4]]')
|
|
|
|
def test_set_displays(self):
|
|
self.check_expr('{*{2}, 3, *[4]}')
|
|
self.check_expr('{2}')
|
|
self.check_expr('{2,}')
|
|
self.check_expr('{2, 3}')
|
|
self.check_expr('{2, 3,}')
|
|
|
|
def test_dict_displays(self):
|
|
self.check_expr('{}')
|
|
self.check_expr('{a:b}')
|
|
self.check_expr('{a:b,}')
|
|
self.check_expr('{a:b, c:d}')
|
|
self.check_expr('{a:b, c:d,}')
|
|
self.check_expr('{**{}}')
|
|
self.check_expr('{**{}, 3:4, **{5:6, 7:8}}')
|
|
|
|
def test_argument_unpacking(self):
|
|
self.check_expr("f(*a, **b)")
|
|
self.check_expr('f(a, *b, *c, *d)')
|
|
self.check_expr('f(**a, **b)')
|
|
self.check_expr('f(2, *a, *b, **b, **c, **d)')
|
|
self.check_expr("f(*b, *() or () and (), **{} and {}, **() or {})")
|
|
|
|
def test_set_comprehensions(self):
|
|
self.check_expr('{x for x in seq}')
|
|
self.check_expr('{f(x) for x in seq}')
|
|
self.check_expr('{f(x) for x in seq if condition(x)}')
|
|
|
|
def test_dict_comprehensions(self):
|
|
self.check_expr('{x:x for x in seq}')
|
|
self.check_expr('{x**2:x[3] for x in seq if condition(x)}')
|
|
self.check_expr('{x:x for x in seq1 for y in seq2 if condition(x, y)}')
|
|
|
|
def test_named_expressions(self):
|
|
self.check_suite("(a := 1)")
|
|
self.check_suite("(a := a)")
|
|
self.check_suite("if (match := pattern.search(data)) is None: pass")
|
|
self.check_suite("while match := pattern.search(f.read()): pass")
|
|
self.check_suite("[y := f(x), y**2, y**3]")
|
|
self.check_suite("filtered_data = [y for x in data if (y := f(x)) is None]")
|
|
self.check_suite("(y := f(x))")
|
|
self.check_suite("y0 = (y1 := f(x))")
|
|
self.check_suite("foo(x=(y := f(x)))")
|
|
self.check_suite("def foo(answer=(p := 42)): pass")
|
|
self.check_suite("def foo(answer: (p := 42) = 5): pass")
|
|
self.check_suite("lambda: (x := 1)")
|
|
self.check_suite("(x := lambda: 1)")
|
|
self.check_suite("(x := lambda: (y := 1))") # not in PEP
|
|
self.check_suite("lambda line: (m := re.match(pattern, line)) and m.group(1)")
|
|
self.check_suite("x = (y := 0)")
|
|
self.check_suite("(z:=(y:=(x:=0)))")
|
|
self.check_suite("(info := (name, phone, *rest))")
|
|
self.check_suite("(x:=1,2)")
|
|
self.check_suite("(total := total + tax)")
|
|
self.check_suite("len(lines := f.readlines())")
|
|
self.check_suite("foo(x := 3, cat='vector')")
|
|
self.check_suite("foo(cat=(category := 'vector'))")
|
|
self.check_suite("if any(len(longline := l) >= 100 for l in lines): print(longline)")
|
|
self.check_suite(
|
|
"if env_base := os.environ.get('PYTHONUSERBASE', None): return env_base"
|
|
)
|
|
self.check_suite(
|
|
"if self._is_special and (ans := self._check_nans(context=context)): return ans"
|
|
)
|
|
self.check_suite("foo(b := 2, a=1)")
|
|
self.check_suite("foo(b := 2, a=1)")
|
|
self.check_suite("foo((b := 2), a=1)")
|
|
self.check_suite("foo(c=(b := 2), a=1)")
|
|
self.check_suite("{(x := C(i)).q: x for i in y}")
|
|
|
|
|
|
#
|
|
# Second, we take *invalid* trees and make sure we get ParserError
|
|
# rejections for them.
|
|
#
|
|
|
|
class IllegalSyntaxTestCase(unittest.TestCase):
|
|
|
|
def check_bad_tree(self, tree, label):
|
|
try:
|
|
parser.sequence2st(tree)
|
|
except parser.ParserError:
|
|
pass
|
|
else:
|
|
self.fail("did not detect invalid tree for %r" % label)
|
|
|
|
def test_junk(self):
|
|
# not even remotely valid:
|
|
self.check_bad_tree((1, 2, 3), "<junk>")
|
|
|
|
def test_illegal_terminal(self):
|
|
tree = \
|
|
(257,
|
|
(269,
|
|
(270,
|
|
(271,
|
|
(277,
|
|
(1,))),
|
|
(4, ''))),
|
|
(4, ''),
|
|
(0, ''))
|
|
self.check_bad_tree(tree, "too small items in terminal node")
|
|
tree = \
|
|
(257,
|
|
(269,
|
|
(270,
|
|
(271,
|
|
(277,
|
|
(1, b'pass'))),
|
|
(4, ''))),
|
|
(4, ''),
|
|
(0, ''))
|
|
self.check_bad_tree(tree, "non-string second item in terminal node")
|
|
tree = \
|
|
(257,
|
|
(269,
|
|
(270,
|
|
(271,
|
|
(277,
|
|
(1, 'pass', '0', 0))),
|
|
(4, ''))),
|
|
(4, ''),
|
|
(0, ''))
|
|
self.check_bad_tree(tree, "non-integer third item in terminal node")
|
|
tree = \
|
|
(257,
|
|
(269,
|
|
(270,
|
|
(271,
|
|
(277,
|
|
(1, 'pass', 0, 0))),
|
|
(4, ''))),
|
|
(4, ''),
|
|
(0, ''))
|
|
self.check_bad_tree(tree, "too many items in terminal node")
|
|
|
|
def test_illegal_yield_1(self):
|
|
# Illegal yield statement: def f(): return 1; yield 1
|
|
tree = \
|
|
(257,
|
|
(264,
|
|
(285,
|
|
(259,
|
|
(1, 'def'),
|
|
(1, 'f'),
|
|
(260, (7, '('), (8, ')')),
|
|
(11, ':'),
|
|
(291,
|
|
(4, ''),
|
|
(5, ''),
|
|
(264,
|
|
(265,
|
|
(266,
|
|
(272,
|
|
(275,
|
|
(1, 'return'),
|
|
(313,
|
|
(292,
|
|
(293,
|
|
(294,
|
|
(295,
|
|
(297,
|
|
(298,
|
|
(299,
|
|
(300,
|
|
(301,
|
|
(302, (303, (304, (305, (2, '1')))))))))))))))))),
|
|
(264,
|
|
(265,
|
|
(266,
|
|
(272,
|
|
(276,
|
|
(1, 'yield'),
|
|
(313,
|
|
(292,
|
|
(293,
|
|
(294,
|
|
(295,
|
|
(297,
|
|
(298,
|
|
(299,
|
|
(300,
|
|
(301,
|
|
(302,
|
|
(303, (304, (305, (2, '1')))))))))))))))))),
|
|
(4, ''))),
|
|
(6, ''))))),
|
|
(4, ''),
|
|
(0, ''))))
|
|
self.check_bad_tree(tree, "def f():\n return 1\n yield 1")
|
|
|
|
def test_illegal_yield_2(self):
|
|
# Illegal return in generator: def f(): return 1; yield 1
|
|
tree = \
|
|
(257,
|
|
(264,
|
|
(265,
|
|
(266,
|
|
(278,
|
|
(1, 'from'),
|
|
(281, (1, '__future__')),
|
|
(1, 'import'),
|
|
(279, (1, 'generators')))),
|
|
(4, ''))),
|
|
(264,
|
|
(285,
|
|
(259,
|
|
(1, 'def'),
|
|
(1, 'f'),
|
|
(260, (7, '('), (8, ')')),
|
|
(11, ':'),
|
|
(291,
|
|
(4, ''),
|
|
(5, ''),
|
|
(264,
|
|
(265,
|
|
(266,
|
|
(272,
|
|
(275,
|
|
(1, 'return'),
|
|
(313,
|
|
(292,
|
|
(293,
|
|
(294,
|
|
(295,
|
|
(297,
|
|
(298,
|
|
(299,
|
|
(300,
|
|
(301,
|
|
(302, (303, (304, (305, (2, '1')))))))))))))))))),
|
|
(264,
|
|
(265,
|
|
(266,
|
|
(272,
|
|
(276,
|
|
(1, 'yield'),
|
|
(313,
|
|
(292,
|
|
(293,
|
|
(294,
|
|
(295,
|
|
(297,
|
|
(298,
|
|
(299,
|
|
(300,
|
|
(301,
|
|
(302,
|
|
(303, (304, (305, (2, '1')))))))))))))))))),
|
|
(4, ''))),
|
|
(6, ''))))),
|
|
(4, ''),
|
|
(0, ''))))
|
|
self.check_bad_tree(tree, "def f():\n return 1\n yield 1")
|
|
|
|
def test_a_comma_comma_c(self):
|
|
# Illegal input: a,,c
|
|
tree = \
|
|
(258,
|
|
(311,
|
|
(290,
|
|
(291,
|
|
(292,
|
|
(293,
|
|
(295,
|
|
(296,
|
|
(297,
|
|
(298, (299, (300, (301, (302, (303, (1, 'a')))))))))))))),
|
|
(12, ','),
|
|
(12, ','),
|
|
(290,
|
|
(291,
|
|
(292,
|
|
(293,
|
|
(295,
|
|
(296,
|
|
(297,
|
|
(298, (299, (300, (301, (302, (303, (1, 'c'))))))))))))))),
|
|
(4, ''),
|
|
(0, ''))
|
|
self.check_bad_tree(tree, "a,,c")
|
|
|
|
def test_illegal_operator(self):
|
|
# Illegal input: a $= b
|
|
tree = \
|
|
(257,
|
|
(264,
|
|
(265,
|
|
(266,
|
|
(267,
|
|
(312,
|
|
(291,
|
|
(292,
|
|
(293,
|
|
(294,
|
|
(296,
|
|
(297,
|
|
(298,
|
|
(299,
|
|
(300, (301, (302, (303, (304, (1, 'a'))))))))))))))),
|
|
(268, (37, '$=')),
|
|
(312,
|
|
(291,
|
|
(292,
|
|
(293,
|
|
(294,
|
|
(296,
|
|
(297,
|
|
(298,
|
|
(299,
|
|
(300, (301, (302, (303, (304, (1, 'b'))))))))))))))))),
|
|
(4, ''))),
|
|
(0, ''))
|
|
self.check_bad_tree(tree, "a $= b")
|
|
|
|
def test_malformed_global(self):
|
|
#doesn't have global keyword in ast
|
|
tree = (257,
|
|
(264,
|
|
(265,
|
|
(266,
|
|
(282, (1, 'foo'))), (4, ''))),
|
|
(4, ''),
|
|
(0, ''))
|
|
self.check_bad_tree(tree, "malformed global ast")
|
|
|
|
def test_missing_import_source(self):
|
|
# from import fred
|
|
tree = \
|
|
(257,
|
|
(268,
|
|
(269,
|
|
(270,
|
|
(282,
|
|
(284, (1, 'from'), (1, 'import'),
|
|
(287, (285, (1, 'fred')))))),
|
|
(4, ''))),
|
|
(4, ''), (0, ''))
|
|
self.check_bad_tree(tree, "from import fred")
|
|
|
|
def test_illegal_encoding(self):
|
|
# Illegal encoding declaration
|
|
tree = \
|
|
(341,
|
|
(257, (0, '')))
|
|
self.check_bad_tree(tree, "missed encoding")
|
|
tree = \
|
|
(341,
|
|
(257, (0, '')),
|
|
b'iso-8859-1')
|
|
self.check_bad_tree(tree, "non-string encoding")
|
|
tree = \
|
|
(341,
|
|
(257, (0, '')),
|
|
'\udcff')
|
|
with self.assertRaises(UnicodeEncodeError):
|
|
parser.sequence2st(tree)
|
|
|
|
def test_invalid_node_id(self):
|
|
tree = (257, (269, (-7, '')))
|
|
self.check_bad_tree(tree, "negative node id")
|
|
tree = (257, (269, (99, '')))
|
|
self.check_bad_tree(tree, "invalid token id")
|
|
tree = (257, (269, (9999, (0, ''))))
|
|
self.check_bad_tree(tree, "invalid symbol id")
|
|
|
|
def test_ParserError_message(self):
|
|
try:
|
|
parser.sequence2st((257,(269,(257,(0,'')))))
|
|
except parser.ParserError as why:
|
|
self.assertIn("compound_stmt", str(why)) # Expected
|
|
self.assertIn("file_input", str(why)) # Got
|
|
|
|
|
|
|
|
class CompileTestCase(unittest.TestCase):
|
|
|
|
# These tests are very minimal. :-(
|
|
|
|
def test_compile_expr(self):
|
|
st = parser.expr('2 + 3')
|
|
code = parser.compilest(st)
|
|
self.assertEqual(eval(code), 5)
|
|
|
|
def test_compile_suite(self):
|
|
st = parser.suite('x = 2; y = x + 3')
|
|
code = parser.compilest(st)
|
|
globs = {}
|
|
exec(code, globs)
|
|
self.assertEqual(globs['y'], 5)
|
|
|
|
def test_compile_error(self):
|
|
st = parser.suite('1 = 3 + 4')
|
|
self.assertRaises(SyntaxError, parser.compilest, st)
|
|
|
|
def test_compile_badunicode(self):
|
|
st = parser.suite('a = "\\U12345678"')
|
|
self.assertRaises(SyntaxError, parser.compilest, st)
|
|
st = parser.suite('a = "\\u1"')
|
|
self.assertRaises(SyntaxError, parser.compilest, st)
|
|
|
|
def test_issue_9011(self):
|
|
# Issue 9011: compilation of an unary minus expression changed
|
|
# the meaning of the ST, so that a second compilation produced
|
|
# incorrect results.
|
|
st = parser.expr('-3')
|
|
code1 = parser.compilest(st)
|
|
self.assertEqual(eval(code1), -3)
|
|
code2 = parser.compilest(st)
|
|
self.assertEqual(eval(code2), -3)
|
|
|
|
def test_compile_filename(self):
|
|
st = parser.expr('a + 5')
|
|
code = parser.compilest(st)
|
|
self.assertEqual(code.co_filename, '<syntax-tree>')
|
|
code = st.compile()
|
|
self.assertEqual(code.co_filename, '<syntax-tree>')
|
|
for filename in 'file.py', b'file.py':
|
|
code = parser.compilest(st, filename)
|
|
self.assertEqual(code.co_filename, 'file.py')
|
|
code = st.compile(filename)
|
|
self.assertEqual(code.co_filename, 'file.py')
|
|
for filename in bytearray(b'file.py'), memoryview(b'file.py'):
|
|
with self.assertWarns(DeprecationWarning):
|
|
code = parser.compilest(st, filename)
|
|
self.assertEqual(code.co_filename, 'file.py')
|
|
with self.assertWarns(DeprecationWarning):
|
|
code = st.compile(filename)
|
|
self.assertEqual(code.co_filename, 'file.py')
|
|
self.assertRaises(TypeError, parser.compilest, st, list(b'file.py'))
|
|
self.assertRaises(TypeError, st.compile, list(b'file.py'))
|
|
|
|
|
|
class ParserStackLimitTestCase(unittest.TestCase):
|
|
"""try to push the parser to/over its limits.
|
|
see http://bugs.python.org/issue1881 for a discussion
|
|
"""
|
|
def _nested_expression(self, level):
|
|
return "["*level+"]"*level
|
|
|
|
def test_deeply_nested_list(self):
|
|
# This has fluctuated between 99 levels in 2.x, down to 93 levels in
|
|
# 3.7.X and back up to 99 in 3.8.X. Related to MAXSTACK size in Parser.h
|
|
e = self._nested_expression(99)
|
|
st = parser.expr(e)
|
|
st.compile()
|
|
|
|
def test_trigger_memory_error(self):
|
|
e = self._nested_expression(100)
|
|
rc, out, err = assert_python_failure('-Xoldparser', '-c', e)
|
|
# parsing the expression will result in an error message
|
|
# followed by a MemoryError (see #11963)
|
|
self.assertIn(b's_push: parser stack overflow', err)
|
|
self.assertIn(b'MemoryError', err)
|
|
|
|
class STObjectTestCase(unittest.TestCase):
|
|
"""Test operations on ST objects themselves"""
|
|
|
|
def test_comparisons(self):
|
|
# ST objects should support order and equality comparisons
|
|
st1 = parser.expr('2 + 3')
|
|
st2 = parser.suite('x = 2; y = x + 3')
|
|
st3 = parser.expr('list(x**3 for x in range(20))')
|
|
st1_copy = parser.expr('2 + 3')
|
|
st2_copy = parser.suite('x = 2; y = x + 3')
|
|
st3_copy = parser.expr('list(x**3 for x in range(20))')
|
|
|
|
# exercise fast path for object identity
|
|
self.assertEqual(st1 == st1, True)
|
|
self.assertEqual(st2 == st2, True)
|
|
self.assertEqual(st3 == st3, True)
|
|
# slow path equality
|
|
self.assertEqual(st1, st1_copy)
|
|
self.assertEqual(st2, st2_copy)
|
|
self.assertEqual(st3, st3_copy)
|
|
self.assertEqual(st1 == st2, False)
|
|
self.assertEqual(st1 == st3, False)
|
|
self.assertEqual(st2 == st3, False)
|
|
self.assertEqual(st1 != st1, False)
|
|
self.assertEqual(st2 != st2, False)
|
|
self.assertEqual(st3 != st3, False)
|
|
self.assertEqual(st1 != st1_copy, False)
|
|
self.assertEqual(st2 != st2_copy, False)
|
|
self.assertEqual(st3 != st3_copy, False)
|
|
self.assertEqual(st2 != st1, True)
|
|
self.assertEqual(st1 != st3, True)
|
|
self.assertEqual(st3 != st2, True)
|
|
# we don't particularly care what the ordering is; just that
|
|
# it's usable and self-consistent
|
|
self.assertEqual(st1 < st2, not (st2 <= st1))
|
|
self.assertEqual(st1 < st3, not (st3 <= st1))
|
|
self.assertEqual(st2 < st3, not (st3 <= st2))
|
|
self.assertEqual(st1 < st2, st2 > st1)
|
|
self.assertEqual(st1 < st3, st3 > st1)
|
|
self.assertEqual(st2 < st3, st3 > st2)
|
|
self.assertEqual(st1 <= st2, st2 >= st1)
|
|
self.assertEqual(st3 <= st1, st1 >= st3)
|
|
self.assertEqual(st2 <= st3, st3 >= st2)
|
|
# transitivity
|
|
bottom = min(st1, st2, st3)
|
|
top = max(st1, st2, st3)
|
|
mid = sorted([st1, st2, st3])[1]
|
|
self.assertTrue(bottom < mid)
|
|
self.assertTrue(bottom < top)
|
|
self.assertTrue(mid < top)
|
|
self.assertTrue(bottom <= mid)
|
|
self.assertTrue(bottom <= top)
|
|
self.assertTrue(mid <= top)
|
|
self.assertTrue(bottom <= bottom)
|
|
self.assertTrue(mid <= mid)
|
|
self.assertTrue(top <= top)
|
|
# interaction with other types
|
|
self.assertEqual(st1 == 1588.602459, False)
|
|
self.assertEqual('spanish armada' != st2, True)
|
|
self.assertRaises(TypeError, operator.ge, st3, None)
|
|
self.assertRaises(TypeError, operator.le, False, st1)
|
|
self.assertRaises(TypeError, operator.lt, st1, 1815)
|
|
self.assertRaises(TypeError, operator.gt, b'waterloo', st2)
|
|
|
|
def test_copy_pickle(self):
|
|
sts = [
|
|
parser.expr('2 + 3'),
|
|
parser.suite('x = 2; y = x + 3'),
|
|
parser.expr('list(x**3 for x in range(20))')
|
|
]
|
|
for st in sts:
|
|
st_copy = copy.copy(st)
|
|
self.assertEqual(st_copy.totuple(), st.totuple())
|
|
st_copy = copy.deepcopy(st)
|
|
self.assertEqual(st_copy.totuple(), st.totuple())
|
|
for proto in range(pickle.HIGHEST_PROTOCOL+1):
|
|
st_copy = pickle.loads(pickle.dumps(st, proto))
|
|
self.assertEqual(st_copy.totuple(), st.totuple())
|
|
|
|
check_sizeof = support.check_sizeof
|
|
|
|
@support.cpython_only
|
|
def test_sizeof(self):
|
|
def XXXROUNDUP(n):
|
|
if n <= 1:
|
|
return n
|
|
if n <= 128:
|
|
return (n + 3) & ~3
|
|
return 1 << (n - 1).bit_length()
|
|
|
|
basesize = support.calcobjsize('Piii')
|
|
nodesize = struct.calcsize('hP3iP0h2i')
|
|
def sizeofchildren(node):
|
|
if node is None:
|
|
return 0
|
|
res = 0
|
|
hasstr = len(node) > 1 and isinstance(node[-1], str)
|
|
if hasstr:
|
|
res += len(node[-1]) + 1
|
|
children = node[1:-1] if hasstr else node[1:]
|
|
if children:
|
|
res += XXXROUNDUP(len(children)) * nodesize
|
|
for child in children:
|
|
res += sizeofchildren(child)
|
|
return res
|
|
|
|
def check_st_sizeof(st):
|
|
self.check_sizeof(st, basesize + nodesize +
|
|
sizeofchildren(st.totuple()))
|
|
|
|
check_st_sizeof(parser.expr('2 + 3'))
|
|
check_st_sizeof(parser.expr('2 + 3 + 4'))
|
|
check_st_sizeof(parser.suite('x = 2 + 3'))
|
|
check_st_sizeof(parser.suite(''))
|
|
check_st_sizeof(parser.suite('# -*- coding: utf-8 -*-'))
|
|
check_st_sizeof(parser.expr('[' + '2,' * 1000 + ']'))
|
|
|
|
|
|
# XXX tests for pickling and unpickling of ST objects should go here
|
|
|
|
class OtherParserCase(unittest.TestCase):
|
|
|
|
def test_two_args_to_expr(self):
|
|
# See bug #12264
|
|
with self.assertRaises(TypeError):
|
|
parser.expr("a", "b")
|
|
|
|
|
|
class TestDeprecation(unittest.TestCase):
|
|
def test_deprecation_message(self):
|
|
code = "def f():\n import parser\n\nf()"
|
|
rc, out, err = assert_python_ok('-c', code)
|
|
self.assertIn(b'<string>:2: DeprecationWarning', err)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
unittest.main()
|