| import math | |
| import unittest | |
| import sys | |
| import _ast | |
| from test import test_support | |
| from test import script_helper | |
| import os | |
| import tempfile | |
| import textwrap | |
| class TestSpecifics(unittest.TestCase): | |
| def test_no_ending_newline(self): | |
| compile("hi", "<test>", "exec") | |
| compile("hi\r", "<test>", "exec") | |
| def test_empty(self): | |
| compile("", "<test>", "exec") | |
| def test_other_newlines(self): | |
| compile("\r\n", "<test>", "exec") | |
| compile("\r", "<test>", "exec") | |
| compile("hi\r\nstuff\r\ndef f():\n pass\r", "<test>", "exec") | |
| compile("this_is\rreally_old_mac\rdef f():\n pass", "<test>", "exec") | |
| def test_debug_assignment(self): | |
| # catch assignments to __debug__ | |
| self.assertRaises(SyntaxError, compile, '__debug__ = 1', '?', 'single') | |
| import __builtin__ | |
| prev = __builtin__.__debug__ | |
| setattr(__builtin__, '__debug__', 'sure') | |
| setattr(__builtin__, '__debug__', prev) | |
| def test_argument_handling(self): | |
| # detect duplicate positional and keyword arguments | |
| self.assertRaises(SyntaxError, eval, 'lambda a,a:0') | |
| self.assertRaises(SyntaxError, eval, 'lambda a,a=1:0') | |
| self.assertRaises(SyntaxError, eval, 'lambda a=1,a=1:0') | |
| try: | |
| exec 'def f(a, a): pass' | |
| self.fail("duplicate arguments") | |
| except SyntaxError: | |
| pass | |
| try: | |
| exec 'def f(a = 0, a = 1): pass' | |
| self.fail("duplicate keyword arguments") | |
| except SyntaxError: | |
| pass | |
| try: | |
| exec 'def f(a): global a; a = 1' | |
| self.fail("variable is global and local") | |
| except SyntaxError: | |
| pass | |
| def test_syntax_error(self): | |
| self.assertRaises(SyntaxError, compile, "1+*3", "filename", "exec") | |
| def test_none_keyword_arg(self): | |
| self.assertRaises(SyntaxError, compile, "f(None=1)", "<string>", "exec") | |
| def test_duplicate_global_local(self): | |
| try: | |
| exec 'def f(a): global a; a = 1' | |
| self.fail("variable is global and local") | |
| except SyntaxError: | |
| pass | |
| def test_exec_functional_style(self): | |
| # Exec'ing a tuple of length 2 works. | |
| g = {'b': 2} | |
| exec("a = b + 1", g) | |
| self.assertEqual(g['a'], 3) | |
| # As does exec'ing a tuple of length 3. | |
| l = {'b': 3} | |
| g = {'b': 5, 'c': 7} | |
| exec("a = b + c", g, l) | |
| self.assertNotIn('a', g) | |
| self.assertEqual(l['a'], 10) | |
| # Tuples not of length 2 or 3 are invalid. | |
| with self.assertRaises(TypeError): | |
| exec("a = b + 1",) | |
| with self.assertRaises(TypeError): | |
| exec("a = b + 1", {}, {}, {}) | |
| # Can't mix and match the two calling forms. | |
| g = {'a': 3, 'b': 4} | |
| l = {} | |
| with self.assertRaises(TypeError): | |
| exec("a = b + 1", g) in g | |
| with self.assertRaises(TypeError): | |
| exec("a = b + 1", g, l) in g, l | |
| def test_nested_qualified_exec(self): | |
| # Can use qualified exec in nested functions. | |
| code = [""" | |
| def g(): | |
| def f(): | |
| if True: | |
| exec "" in {}, {} | |
| """, """ | |
| def g(): | |
| def f(): | |
| if True: | |
| exec("", {}, {}) | |
| """, """ | |
| def g(): | |
| def f(): | |
| if True: | |
| exec("", {}) | |
| """] | |
| for c in code: | |
| compile(c, "<code>", "exec") | |
| def test_exec_with_general_mapping_for_locals(self): | |
| class M: | |
| "Test mapping interface versus possible calls from eval()." | |
| def __getitem__(self, key): | |
| if key == 'a': | |
| return 12 | |
| raise KeyError | |
| def __setitem__(self, key, value): | |
| self.results = (key, value) | |
| def keys(self): | |
| return list('xyz') | |
| m = M() | |
| g = globals() | |
| exec 'z = a' in g, m | |
| self.assertEqual(m.results, ('z', 12)) | |
| try: | |
| exec 'z = b' in g, m | |
| except NameError: | |
| pass | |
| else: | |
| self.fail('Did not detect a KeyError') | |
| exec 'z = dir()' in g, m | |
| self.assertEqual(m.results, ('z', list('xyz'))) | |
| exec 'z = globals()' in g, m | |
| self.assertEqual(m.results, ('z', g)) | |
| exec 'z = locals()' in g, m | |
| self.assertEqual(m.results, ('z', m)) | |
| try: | |
| exec 'z = b' in m | |
| except TypeError: | |
| pass | |
| else: | |
| self.fail('Did not validate globals as a real dict') | |
| class A: | |
| "Non-mapping" | |
| pass | |
| m = A() | |
| try: | |
| exec 'z = a' in g, m | |
| except TypeError: | |
| pass | |
| else: | |
| self.fail('Did not validate locals as a mapping') | |
| # Verify that dict subclasses work as well | |
| class D(dict): | |
| def __getitem__(self, key): | |
| if key == 'a': | |
| return 12 | |
| return dict.__getitem__(self, key) | |
| d = D() | |
| exec 'z = a' in g, d | |
| self.assertEqual(d['z'], 12) | |
| def test_extended_arg(self): | |
| longexpr = 'x = x or ' + '-x' * 2500 | |
| code = ''' | |
| def f(x): | |
| %s | |
| %s | |
| %s | |
| %s | |
| %s | |
| %s | |
| %s | |
| %s | |
| %s | |
| %s | |
| # the expressions above have no effect, x == argument | |
| while x: | |
| x -= 1 | |
| # EXTENDED_ARG/JUMP_ABSOLUTE here | |
| return x | |
| ''' % ((longexpr,)*10) | |
| exec code | |
| self.assertEqual(f(5), 0) | |
| def test_complex_args(self): | |
| with test_support.check_py3k_warnings( | |
| ("tuple parameter unpacking has been removed", SyntaxWarning)): | |
| exec textwrap.dedent(''' | |
| def comp_args((a, b)): | |
| return a,b | |
| self.assertEqual(comp_args((1, 2)), (1, 2)) | |
| def comp_args((a, b)=(3, 4)): | |
| return a, b | |
| self.assertEqual(comp_args((1, 2)), (1, 2)) | |
| self.assertEqual(comp_args(), (3, 4)) | |
| def comp_args(a, (b, c)): | |
| return a, b, c | |
| self.assertEqual(comp_args(1, (2, 3)), (1, 2, 3)) | |
| def comp_args(a=2, (b, c)=(3, 4)): | |
| return a, b, c | |
| self.assertEqual(comp_args(1, (2, 3)), (1, 2, 3)) | |
| self.assertEqual(comp_args(), (2, 3, 4)) | |
| ''') | |
| def test_argument_order(self): | |
| try: | |
| exec 'def f(a=1, (b, c)): pass' | |
| self.fail("non-default args after default") | |
| except SyntaxError: | |
| pass | |
| def test_float_literals(self): | |
| # testing bad float literals | |
| self.assertRaises(SyntaxError, eval, "2e") | |
| self.assertRaises(SyntaxError, eval, "2.0e+") | |
| self.assertRaises(SyntaxError, eval, "1e-") | |
| self.assertRaises(SyntaxError, eval, "3-4e/21") | |
| def test_indentation(self): | |
| # testing compile() of indented block w/o trailing newline" | |
| s = """ | |
| if 1: | |
| if 2: | |
| pass""" | |
| compile(s, "<string>", "exec") | |
| # This test is probably specific to CPython and may not generalize | |
| # to other implementations. We are trying to ensure that when | |
| # the first line of code starts after 256, correct line numbers | |
| # in tracebacks are still produced. | |
| def test_leading_newlines(self): | |
| s256 = "".join(["\n"] * 256 + ["spam"]) | |
| co = compile(s256, 'fn', 'exec') | |
| self.assertEqual(co.co_firstlineno, 257) | |
| self.assertEqual(co.co_lnotab, '') | |
| def test_literals_with_leading_zeroes(self): | |
| for arg in ["077787", "0xj", "0x.", "0e", "090000000000000", | |
| "080000000000000", "000000000000009", "000000000000008", | |
| "0b42", "0BADCAFE", "0o123456789", "0b1.1", "0o4.2", | |
| "0b101j2", "0o153j2", "0b100e1", "0o777e1", "0o8", "0o78"]: | |
| self.assertRaises(SyntaxError, eval, arg) | |
| self.assertEqual(eval("0777"), 511) | |
| self.assertEqual(eval("0777L"), 511) | |
| self.assertEqual(eval("000777"), 511) | |
| self.assertEqual(eval("0xff"), 255) | |
| self.assertEqual(eval("0xffL"), 255) | |
| self.assertEqual(eval("0XfF"), 255) | |
| self.assertEqual(eval("0777."), 777) | |
| self.assertEqual(eval("0777.0"), 777) | |
| self.assertEqual(eval("000000000000000000000000000000000000000000000000000777e0"), 777) | |
| self.assertEqual(eval("0777e1"), 7770) | |
| self.assertEqual(eval("0e0"), 0) | |
| self.assertEqual(eval("0000E-012"), 0) | |
| self.assertEqual(eval("09.5"), 9.5) | |
| self.assertEqual(eval("0777j"), 777j) | |
| self.assertEqual(eval("00j"), 0j) | |
| self.assertEqual(eval("00.0"), 0) | |
| self.assertEqual(eval("0e3"), 0) | |
| self.assertEqual(eval("090000000000000."), 90000000000000.) | |
| self.assertEqual(eval("090000000000000.0000000000000000000000"), 90000000000000.) | |
| self.assertEqual(eval("090000000000000e0"), 90000000000000.) | |
| self.assertEqual(eval("090000000000000e-0"), 90000000000000.) | |
| self.assertEqual(eval("090000000000000j"), 90000000000000j) | |
| self.assertEqual(eval("000000000000007"), 7) | |
| self.assertEqual(eval("000000000000008."), 8.) | |
| self.assertEqual(eval("000000000000009."), 9.) | |
| self.assertEqual(eval("0b101010"), 42) | |
| self.assertEqual(eval("-0b000000000010"), -2) | |
| self.assertEqual(eval("0o777"), 511) | |
| self.assertEqual(eval("-0o0000010"), -8) | |
| self.assertEqual(eval("020000000000.0"), 20000000000.0) | |
| self.assertEqual(eval("037777777777e0"), 37777777777.0) | |
| self.assertEqual(eval("01000000000000000000000.0"), | |
| 1000000000000000000000.0) | |
| def test_unary_minus(self): | |
| # Verify treatment of unary minus on negative numbers SF bug #660455 | |
| if sys.maxint == 2147483647: | |
| # 32-bit machine | |
| all_one_bits = '0xffffffff' | |
| self.assertEqual(eval(all_one_bits), 4294967295L) | |
| self.assertEqual(eval("-" + all_one_bits), -4294967295L) | |
| elif sys.maxint == 9223372036854775807: | |
| # 64-bit machine | |
| all_one_bits = '0xffffffffffffffff' | |
| self.assertEqual(eval(all_one_bits), 18446744073709551615L) | |
| self.assertEqual(eval("-" + all_one_bits), -18446744073709551615L) | |
| else: | |
| self.fail("How many bits *does* this machine have???") | |
| # Verify treatment of constant folding on -(sys.maxint+1) | |
| # i.e. -2147483648 on 32 bit platforms. Should return int, not long. | |
| self.assertIsInstance(eval("%s" % (-sys.maxint - 1)), int) | |
| self.assertIsInstance(eval("%s" % (-sys.maxint - 2)), long) | |
| if sys.maxint == 9223372036854775807: | |
| def test_32_63_bit_values(self): | |
| a = +4294967296 # 1 << 32 | |
| b = -4294967296 # 1 << 32 | |
| c = +281474976710656 # 1 << 48 | |
| d = -281474976710656 # 1 << 48 | |
| e = +4611686018427387904 # 1 << 62 | |
| f = -4611686018427387904 # 1 << 62 | |
| g = +9223372036854775807 # 1 << 63 - 1 | |
| h = -9223372036854775807 # 1 << 63 - 1 | |
| for variable in self.test_32_63_bit_values.func_code.co_consts: | |
| if variable is not None: | |
| self.assertIsInstance(variable, int) | |
| def test_sequence_unpacking_error(self): | |
| # Verify sequence packing/unpacking with "or". SF bug #757818 | |
| i,j = (1, -1) or (-1, 1) | |
| self.assertEqual(i, 1) | |
| self.assertEqual(j, -1) | |
| def test_none_assignment(self): | |
| stmts = [ | |
| 'None = 0', | |
| 'None += 0', | |
| '__builtins__.None = 0', | |
| 'def None(): pass', | |
| 'class None: pass', | |
| '(a, None) = 0, 0', | |
| 'for None in range(10): pass', | |
| 'def f(None): pass', | |
| 'import None', | |
| 'import x as None', | |
| 'from x import None', | |
| 'from x import y as None' | |
| ] | |
| for stmt in stmts: | |
| stmt += "\n" | |
| self.assertRaises(SyntaxError, compile, stmt, 'tmp', 'single') | |
| self.assertRaises(SyntaxError, compile, stmt, 'tmp', 'exec') | |
| # This is ok. | |
| compile("from None import x", "tmp", "exec") | |
| compile("from x import None as y", "tmp", "exec") | |
| compile("import None as x", "tmp", "exec") | |
| def test_import(self): | |
| succeed = [ | |
| 'import sys', | |
| 'import os, sys', | |
| 'import os as bar', | |
| 'import os.path as bar', | |
| 'from __future__ import nested_scopes, generators', | |
| 'from __future__ import (nested_scopes,\ngenerators)', | |
| 'from __future__ import (nested_scopes,\ngenerators,)', | |
| 'from sys import stdin, stderr, stdout', | |
| 'from sys import (stdin, stderr,\nstdout)', | |
| 'from sys import (stdin, stderr,\nstdout,)', | |
| 'from sys import (stdin\n, stderr, stdout)', | |
| 'from sys import (stdin\n, stderr, stdout,)', | |
| 'from sys import stdin as si, stdout as so, stderr as se', | |
| 'from sys import (stdin as si, stdout as so, stderr as se)', | |
| 'from sys import (stdin as si, stdout as so, stderr as se,)', | |
| ] | |
| fail = [ | |
| 'import (os, sys)', | |
| 'import (os), (sys)', | |
| 'import ((os), (sys))', | |
| 'import (sys', | |
| 'import sys)', | |
| 'import (os,)', | |
| 'import os As bar', | |
| 'import os.path a bar', | |
| 'from sys import stdin As stdout', | |
| 'from sys import stdin a stdout', | |
| 'from (sys) import stdin', | |
| 'from __future__ import (nested_scopes', | |
| 'from __future__ import nested_scopes)', | |
| 'from __future__ import nested_scopes,\ngenerators', | |
| 'from sys import (stdin', | |
| 'from sys import stdin)', | |
| 'from sys import stdin, stdout,\nstderr', | |
| 'from sys import stdin si', | |
| 'from sys import stdin,' | |
| 'from sys import (*)', | |
| 'from sys import (stdin,, stdout, stderr)', | |
| 'from sys import (stdin, stdout),', | |
| ] | |
| for stmt in succeed: | |
| compile(stmt, 'tmp', 'exec') | |
| for stmt in fail: | |
| self.assertRaises(SyntaxError, compile, stmt, 'tmp', 'exec') | |
| def test_for_distinct_code_objects(self): | |
| # SF bug 1048870 | |
| def f(): | |
| f1 = lambda x=1: x | |
| f2 = lambda x=2: x | |
| return f1, f2 | |
| f1, f2 = f() | |
| self.assertNotEqual(id(f1.func_code), id(f2.func_code)) | |
| def test_lambda_doc(self): | |
| l = lambda: "foo" | |
| self.assertIsNone(l.__doc__) | |
| @test_support.requires_unicode | |
| def test_encoding(self): | |
| code = b'# -*- coding: badencoding -*-\npass\n' | |
| self.assertRaises(SyntaxError, compile, code, 'tmp', 'exec') | |
| code = u"# -*- coding: utf-8 -*-\npass\n" | |
| self.assertRaises(SyntaxError, compile, code, "tmp", "exec") | |
| code = 'u"\xc2\xa4"\n' | |
| self.assertEqual(eval(code), u'\xc2\xa4') | |
| code = u'u"\xc2\xa4"\n' | |
| self.assertEqual(eval(code), u'\xc2\xa4') | |
| code = '# -*- coding: latin1 -*-\nu"\xc2\xa4"\n' | |
| self.assertEqual(eval(code), u'\xc2\xa4') | |
| code = '# -*- coding: utf-8 -*-\nu"\xc2\xa4"\n' | |
| self.assertEqual(eval(code), u'\xa4') | |
| code = '# -*- coding: iso8859-15 -*-\nu"\xc2\xa4"\n' | |
| self.assertEqual(eval(code), test_support.u(r'\xc2\u20ac')) | |
| code = 'u"""\\\n# -*- coding: utf-8 -*-\n\xc2\xa4"""\n' | |
| self.assertEqual(eval(code), u'# -*- coding: utf-8 -*-\n\xc2\xa4') | |
| def test_subscripts(self): | |
| # SF bug 1448804 | |
| # Class to make testing subscript results easy | |
| class str_map(object): | |
| def __init__(self): | |
| self.data = {} | |
| def __getitem__(self, key): | |
| return self.data[str(key)] | |
| def __setitem__(self, key, value): | |
| self.data[str(key)] = value | |
| def __delitem__(self, key): | |
| del self.data[str(key)] | |
| def __contains__(self, key): | |
| return str(key) in self.data | |
| d = str_map() | |
| # Index | |
| d[1] = 1 | |
| self.assertEqual(d[1], 1) | |
| d[1] += 1 | |
| self.assertEqual(d[1], 2) | |
| del d[1] | |
| self.assertNotIn(1, d) | |
| # Tuple of indices | |
| d[1, 1] = 1 | |
| self.assertEqual(d[1, 1], 1) | |
| d[1, 1] += 1 | |
| self.assertEqual(d[1, 1], 2) | |
| del d[1, 1] | |
| self.assertNotIn((1, 1), d) | |
| # Simple slice | |
| d[1:2] = 1 | |
| self.assertEqual(d[1:2], 1) | |
| d[1:2] += 1 | |
| self.assertEqual(d[1:2], 2) | |
| del d[1:2] | |
| self.assertNotIn(slice(1, 2), d) | |
| # Tuple of simple slices | |
| d[1:2, 1:2] = 1 | |
| self.assertEqual(d[1:2, 1:2], 1) | |
| d[1:2, 1:2] += 1 | |
| self.assertEqual(d[1:2, 1:2], 2) | |
| del d[1:2, 1:2] | |
| self.assertNotIn((slice(1, 2), slice(1, 2)), d) | |
| # Extended slice | |
| d[1:2:3] = 1 | |
| self.assertEqual(d[1:2:3], 1) | |
| d[1:2:3] += 1 | |
| self.assertEqual(d[1:2:3], 2) | |
| del d[1:2:3] | |
| self.assertNotIn(slice(1, 2, 3), d) | |
| # Tuple of extended slices | |
| d[1:2:3, 1:2:3] = 1 | |
| self.assertEqual(d[1:2:3, 1:2:3], 1) | |
| d[1:2:3, 1:2:3] += 1 | |
| self.assertEqual(d[1:2:3, 1:2:3], 2) | |
| del d[1:2:3, 1:2:3] | |
| self.assertNotIn((slice(1, 2, 3), slice(1, 2, 3)), d) | |
| # Ellipsis | |
| d[...] = 1 | |
| self.assertEqual(d[...], 1) | |
| d[...] += 1 | |
| self.assertEqual(d[...], 2) | |
| del d[...] | |
| self.assertNotIn(Ellipsis, d) | |
| # Tuple of Ellipses | |
| d[..., ...] = 1 | |
| self.assertEqual(d[..., ...], 1) | |
| d[..., ...] += 1 | |
| self.assertEqual(d[..., ...], 2) | |
| del d[..., ...] | |
| self.assertNotIn((Ellipsis, Ellipsis), d) | |
| def test_mangling(self): | |
| class A: | |
| def f(): | |
| __mangled = 1 | |
| __not_mangled__ = 2 | |
| import __mangled_mod | |
| import __package__.module | |
| self.assertIn("_A__mangled", A.f.func_code.co_varnames) | |
| self.assertIn("__not_mangled__", A.f.func_code.co_varnames) | |
| self.assertIn("_A__mangled_mod", A.f.func_code.co_varnames) | |
| self.assertIn("__package__", A.f.func_code.co_varnames) | |
| def test_compile_ast(self): | |
| fname = __file__ | |
| if fname.lower().endswith(('pyc', 'pyo')): | |
| fname = fname[:-1] | |
| with open(fname, 'r') as f: | |
| fcontents = f.read() | |
| sample_code = [ | |
| ['<assign>', 'x = 5'], | |
| ['<print1>', 'print 1'], | |
| ['<printv>', 'print v'], | |
| ['<printTrue>', 'print True'], | |
| ['<printList>', 'print []'], | |
| ['<ifblock>', """if True:\n pass\n"""], | |
| ['<forblock>', """for n in [1, 2, 3]:\n print n\n"""], | |
| ['<deffunc>', """def foo():\n pass\nfoo()\n"""], | |
| [fname, fcontents], | |
| ] | |
| for fname, code in sample_code: | |
| co1 = compile(code, '%s1' % fname, 'exec') | |
| ast = compile(code, '%s2' % fname, 'exec', _ast.PyCF_ONLY_AST) | |
| self.assertTrue(type(ast) == _ast.Module) | |
| co2 = compile(ast, '%s3' % fname, 'exec') | |
| self.assertEqual(co1, co2) | |
| # the code object's filename comes from the second compilation step | |
| self.assertEqual(co2.co_filename, '%s3' % fname) | |
| # raise exception when node type doesn't match with compile mode | |
| co1 = compile('print 1', '<string>', 'exec', _ast.PyCF_ONLY_AST) | |
| self.assertRaises(TypeError, compile, co1, '<ast>', 'eval') | |
| # raise exception when node type is no start node | |
| self.assertRaises(TypeError, compile, _ast.If(), '<ast>', 'exec') | |
| # raise exception when node has invalid children | |
| ast = _ast.Module() | |
| ast.body = [_ast.BoolOp()] | |
| self.assertRaises(TypeError, compile, ast, '<ast>', 'exec') | |
| def test_yet_more_evil_still_undecodable(self): | |
| # Issue #25388 | |
| src = b"#\x00\n#\xfd\n" | |
| tmpd = tempfile.mkdtemp() | |
| try: | |
| fn = os.path.join(tmpd, "bad.py") | |
| with open(fn, "wb") as fp: | |
| fp.write(src) | |
| rc, out, err = script_helper.assert_python_failure(fn) | |
| finally: | |
| test_support.rmtree(tmpd) | |
| self.assertIn(b"Non-ASCII", err) | |
| def test_null_terminated(self): | |
| # The source code is null-terminated internally, but bytes-like | |
| # objects are accepted, which could be not terminated. | |
| with self.assertRaisesRegexp(TypeError, "without null bytes"): | |
| compile(u"123\x00", "<dummy>", "eval") | |
| with test_support.check_py3k_warnings(): | |
| with self.assertRaisesRegexp(TypeError, "without null bytes"): | |
| compile(buffer("123\x00"), "<dummy>", "eval") | |
| code = compile(buffer("123\x00", 1, 2), "<dummy>", "eval") | |
| self.assertEqual(eval(code), 23) | |
| code = compile(buffer("1234", 1, 2), "<dummy>", "eval") | |
| self.assertEqual(eval(code), 23) | |
| code = compile(buffer("$23$", 1, 2), "<dummy>", "eval") | |
| self.assertEqual(eval(code), 23) | |
| class TestStackSize(unittest.TestCase): | |
| # These tests check that the computed stack size for a code object | |
| # stays within reasonable bounds (see issue #21523 for an example | |
| # dysfunction). | |
| N = 100 | |
| def check_stack_size(self, code): | |
| # To assert that the alleged stack size is not O(N), we | |
| # check that it is smaller than log(N). | |
| if isinstance(code, str): | |
| code = compile(code, "<foo>", "single") | |
| max_size = math.ceil(math.log(len(code.co_code))) | |
| self.assertLessEqual(code.co_stacksize, max_size) | |
| def test_and(self): | |
| self.check_stack_size("x and " * self.N + "x") | |
| def test_or(self): | |
| self.check_stack_size("x or " * self.N + "x") | |
| def test_and_or(self): | |
| self.check_stack_size("x and x or " * self.N + "x") | |
| def test_chained_comparison(self): | |
| self.check_stack_size("x < " * self.N + "x") | |
| def test_if_else(self): | |
| self.check_stack_size("x if x else " * self.N + "x") | |
| def test_binop(self): | |
| self.check_stack_size("x + " * self.N + "x") | |
| def test_func_and(self): | |
| code = "def f(x):\n" | |
| code += " x and x\n" * self.N | |
| self.check_stack_size(code) | |
| def check_constant(self, func, expected): | |
| for const in func.__code__.co_consts: | |
| if repr(const) == repr(expected): | |
| break | |
| else: | |
| self.fail("unable to find constant %r in %r" | |
| % (expected, func.__code__.co_consts)) | |
| # Merging equal constants is not a strict requirement for the Python | |
| # semantics, it's a more an implementation detail. | |
| @test_support.cpython_only | |
| def test_merge_constants(self): | |
| # Issue #25843: compile() must merge constants which are equal | |
| # and have the same type. | |
| def check_same_constant(const): | |
| ns = {} | |
| code = "f1, f2 = lambda: %r, lambda: %r" % (const, const) | |
| exec(code, ns) | |
| f1 = ns['f1'] | |
| f2 = ns['f2'] | |
| self.assertIs(f1.__code__, f2.__code__) | |
| self.check_constant(f1, const) | |
| self.assertEqual(repr(f1()), repr(const)) | |
| check_same_constant(None) | |
| check_same_constant(0) | |
| check_same_constant(0.0) | |
| check_same_constant(b'abc') | |
| check_same_constant('abc') | |
| def test_dont_merge_constants(self): | |
| # Issue #25843: compile() must not merge constants which are equal | |
| # but have a different type. | |
| def check_different_constants(const1, const2): | |
| ns = {} | |
| exec("f1, f2 = lambda: %r, lambda: %r" % (const1, const2), ns) | |
| f1 = ns['f1'] | |
| f2 = ns['f2'] | |
| self.assertIsNot(f1.__code__, f2.__code__) | |
| self.check_constant(f1, const1) | |
| self.check_constant(f2, const2) | |
| self.assertEqual(repr(f1()), repr(const1)) | |
| self.assertEqual(repr(f2()), repr(const2)) | |
| check_different_constants(0, 0.0) | |
| check_different_constants(+0.0, -0.0) | |
| check_different_constants((0,), (0.0,)) | |
| # check_different_constants() cannot be used because repr(-0j) is | |
| # '(-0-0j)', but when '(-0-0j)' is evaluated to 0j: we loose the sign. | |
| f1, f2 = lambda: +0.0j, lambda: -0.0j | |
| self.assertIsNot(f1.__code__, f2.__code__) | |
| self.check_constant(f1, +0.0j) | |
| self.check_constant(f2, -0.0j) | |
| self.assertEqual(repr(f1()), repr(+0.0j)) | |
| self.assertEqual(repr(f2()), repr(-0.0j)) | |
| def test_main(): | |
| test_support.run_unittest(__name__) | |
| if __name__ == "__main__": | |
| unittest.main() |