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Diffstat (limited to 'Lib/lib2to3/tests/test_util.py')
| -rw-r--r-- | Lib/lib2to3/tests/test_util.py | 536 |
1 files changed, 536 insertions, 0 deletions
diff --git a/Lib/lib2to3/tests/test_util.py b/Lib/lib2to3/tests/test_util.py new file mode 100644 index 0000000..2c22378 --- /dev/null +++ b/Lib/lib2to3/tests/test_util.py @@ -0,0 +1,536 @@ +#!/usr/bin/env python2.5 +""" Test suite for the code in fixes.util """ +# Author: Collin Winter + +# Testing imports +from . import support + +# Python imports +import os.path + +# Local imports +from .. import pytree +from ..fixes import util + + +def parse(code, strip_levels=0): + # The topmost node is file_input, which we don't care about. + # The next-topmost node is a *_stmt node, which we also don't care about + tree = support.parse_string(code) + for i in range(strip_levels): + tree = tree.children[0] + tree.parent = None + return tree + +class MacroTestCase(support.TestCase): + def assertStr(self, node, string): + if isinstance(node, (tuple, list)): + node = pytree.Node(util.syms.simple_stmt, node) + self.assertEqual(str(node), string) + + +class Test_is_tuple(support.TestCase): + def is_tuple(self, string): + return util.is_tuple(parse(string, strip_levels=2)) + + def test_valid(self): + self.failUnless(self.is_tuple("(a, b)")) + self.failUnless(self.is_tuple("(a, (b, c))")) + self.failUnless(self.is_tuple("((a, (b, c)),)")) + self.failUnless(self.is_tuple("(a,)")) + self.failUnless(self.is_tuple("()")) + + def test_invalid(self): + self.failIf(self.is_tuple("(a)")) + self.failIf(self.is_tuple("('foo') % (b, c)")) + + +class Test_is_list(support.TestCase): + def is_list(self, string): + return util.is_list(parse(string, strip_levels=2)) + + def test_valid(self): + self.failUnless(self.is_list("[]")) + self.failUnless(self.is_list("[a]")) + self.failUnless(self.is_list("[a, b]")) + self.failUnless(self.is_list("[a, [b, c]]")) + self.failUnless(self.is_list("[[a, [b, c]],]")) + + def test_invalid(self): + self.failIf(self.is_list("[]+[]")) + + +class Test_Attr(MacroTestCase): + def test(self): + from ..fixes.util import Attr, Name + call = parse("foo()", strip_levels=2) + + self.assertStr(Attr(Name("a"), Name("b")), "a.b") + self.assertStr(Attr(call, Name("b")), "foo().b") + + def test_returns(self): + from ..fixes.util import Attr, Name + + attr = Attr(Name("a"), Name("b")) + self.assertEqual(type(attr), list) + + +class Test_Name(MacroTestCase): + def test(self): + from ..fixes.util import Name + + self.assertStr(Name("a"), "a") + self.assertStr(Name("foo.foo().bar"), "foo.foo().bar") + self.assertStr(Name("a", prefix="b"), "ba") + + +class Test_does_tree_import(support.TestCase): + def _find_bind_rec(self, name, node): + # Search a tree for a binding -- used to find the starting + # point for these tests. + c = util.find_binding(name, node) + if c: return c + for child in node.children: + c = self._find_bind_rec(name, child) + if c: return c + + def does_tree_import(self, package, name, string): + node = parse(string) + # Find the binding of start -- that's what we'll go from + node = self._find_bind_rec('start', node) + return util.does_tree_import(package, name, node) + + def try_with(self, string): + failing_tests = (("a", "a", "from a import b"), + ("a.d", "a", "from a.d import b"), + ("d.a", "a", "from d.a import b"), + (None, "a", "import b"), + (None, "a", "import b, c, d")) + for package, name, import_ in failing_tests: + n = self.does_tree_import(package, name, import_ + "\n" + string) + self.failIf(n) + n = self.does_tree_import(package, name, string + "\n" + import_) + self.failIf(n) + + passing_tests = (("a", "a", "from a import a"), + ("x", "a", "from x import a"), + ("x", "a", "from x import b, c, a, d"), + ("x.b", "a", "from x.b import a"), + ("x.b", "a", "from x.b import b, c, a, d"), + (None, "a", "import a"), + (None, "a", "import b, c, a, d")) + for package, name, import_ in passing_tests: + n = self.does_tree_import(package, name, import_ + "\n" + string) + self.failUnless(n) + n = self.does_tree_import(package, name, string + "\n" + import_) + self.failUnless(n) + + def test_in_function(self): + self.try_with("def foo():\n\tbar.baz()\n\tstart=3") + +class Test_find_binding(support.TestCase): + def find_binding(self, name, string, package=None): + return util.find_binding(name, parse(string), package) + + def test_simple_assignment(self): + self.failUnless(self.find_binding("a", "a = b")) + self.failUnless(self.find_binding("a", "a = [b, c, d]")) + self.failUnless(self.find_binding("a", "a = foo()")) + self.failUnless(self.find_binding("a", "a = foo().foo.foo[6][foo]")) + self.failIf(self.find_binding("a", "foo = a")) + self.failIf(self.find_binding("a", "foo = (a, b, c)")) + + def test_tuple_assignment(self): + self.failUnless(self.find_binding("a", "(a,) = b")) + self.failUnless(self.find_binding("a", "(a, b, c) = [b, c, d]")) + self.failUnless(self.find_binding("a", "(c, (d, a), b) = foo()")) + self.failUnless(self.find_binding("a", "(a, b) = foo().foo[6][foo]")) + self.failIf(self.find_binding("a", "(foo, b) = (b, a)")) + self.failIf(self.find_binding("a", "(foo, (b, c)) = (a, b, c)")) + + def test_list_assignment(self): + self.failUnless(self.find_binding("a", "[a] = b")) + self.failUnless(self.find_binding("a", "[a, b, c] = [b, c, d]")) + self.failUnless(self.find_binding("a", "[c, [d, a], b] = foo()")) + self.failUnless(self.find_binding("a", "[a, b] = foo().foo[a][foo]")) + self.failIf(self.find_binding("a", "[foo, b] = (b, a)")) + self.failIf(self.find_binding("a", "[foo, [b, c]] = (a, b, c)")) + + def test_invalid_assignments(self): + self.failIf(self.find_binding("a", "foo.a = 5")) + self.failIf(self.find_binding("a", "foo[a] = 5")) + self.failIf(self.find_binding("a", "foo(a) = 5")) + self.failIf(self.find_binding("a", "foo(a, b) = 5")) + + def test_simple_import(self): + self.failUnless(self.find_binding("a", "import a")) + self.failUnless(self.find_binding("a", "import b, c, a, d")) + self.failIf(self.find_binding("a", "import b")) + self.failIf(self.find_binding("a", "import b, c, d")) + + def test_from_import(self): + self.failUnless(self.find_binding("a", "from x import a")) + self.failUnless(self.find_binding("a", "from a import a")) + self.failUnless(self.find_binding("a", "from x import b, c, a, d")) + self.failUnless(self.find_binding("a", "from x.b import a")) + self.failUnless(self.find_binding("a", "from x.b import b, c, a, d")) + self.failIf(self.find_binding("a", "from a import b")) + self.failIf(self.find_binding("a", "from a.d import b")) + self.failIf(self.find_binding("a", "from d.a import b")) + + def test_import_as(self): + self.failUnless(self.find_binding("a", "import b as a")) + self.failUnless(self.find_binding("a", "import b as a, c, a as f, d")) + self.failIf(self.find_binding("a", "import a as f")) + self.failIf(self.find_binding("a", "import b, c as f, d as e")) + + def test_from_import_as(self): + self.failUnless(self.find_binding("a", "from x import b as a")) + self.failUnless(self.find_binding("a", "from x import g as a, d as b")) + self.failUnless(self.find_binding("a", "from x.b import t as a")) + self.failUnless(self.find_binding("a", "from x.b import g as a, d")) + self.failIf(self.find_binding("a", "from a import b as t")) + self.failIf(self.find_binding("a", "from a.d import b as t")) + self.failIf(self.find_binding("a", "from d.a import b as t")) + + def test_simple_import_with_package(self): + self.failUnless(self.find_binding("b", "import b")) + self.failUnless(self.find_binding("b", "import b, c, d")) + self.failIf(self.find_binding("b", "import b", "b")) + self.failIf(self.find_binding("b", "import b, c, d", "c")) + + def test_from_import_with_package(self): + self.failUnless(self.find_binding("a", "from x import a", "x")) + self.failUnless(self.find_binding("a", "from a import a", "a")) + self.failUnless(self.find_binding("a", "from x import *", "x")) + self.failUnless(self.find_binding("a", "from x import b, c, a, d", "x")) + self.failUnless(self.find_binding("a", "from x.b import a", "x.b")) + self.failUnless(self.find_binding("a", "from x.b import *", "x.b")) + self.failUnless(self.find_binding("a", "from x.b import b, c, a, d", "x.b")) + self.failIf(self.find_binding("a", "from a import b", "a")) + self.failIf(self.find_binding("a", "from a.d import b", "a.d")) + self.failIf(self.find_binding("a", "from d.a import b", "a.d")) + self.failIf(self.find_binding("a", "from x.y import *", "a.b")) + + def test_import_as_with_package(self): + self.failIf(self.find_binding("a", "import b.c as a", "b.c")) + self.failIf(self.find_binding("a", "import a as f", "f")) + self.failIf(self.find_binding("a", "import a as f", "a")) + + def test_from_import_as_with_package(self): + # Because it would take a lot of special-case code in the fixers + # to deal with from foo import bar as baz, we'll simply always + # fail if there is an "from ... import ... as ..." + self.failIf(self.find_binding("a", "from x import b as a", "x")) + self.failIf(self.find_binding("a", "from x import g as a, d as b", "x")) + self.failIf(self.find_binding("a", "from x.b import t as a", "x.b")) + self.failIf(self.find_binding("a", "from x.b import g as a, d", "x.b")) + self.failIf(self.find_binding("a", "from a import b as t", "a")) + self.failIf(self.find_binding("a", "from a import b as t", "b")) + self.failIf(self.find_binding("a", "from a import b as t", "t")) + + def test_function_def(self): + self.failUnless(self.find_binding("a", "def a(): pass")) + self.failUnless(self.find_binding("a", "def a(b, c, d): pass")) + self.failUnless(self.find_binding("a", "def a(): b = 7")) + self.failIf(self.find_binding("a", "def d(b, (c, a), e): pass")) + self.failIf(self.find_binding("a", "def d(a=7): pass")) + self.failIf(self.find_binding("a", "def d(a): pass")) + self.failIf(self.find_binding("a", "def d(): a = 7")) + + s = """ + def d(): + def a(): + pass""" + self.failIf(self.find_binding("a", s)) + + def test_class_def(self): + self.failUnless(self.find_binding("a", "class a: pass")) + self.failUnless(self.find_binding("a", "class a(): pass")) + self.failUnless(self.find_binding("a", "class a(b): pass")) + self.failUnless(self.find_binding("a", "class a(b, c=8): pass")) + self.failIf(self.find_binding("a", "class d: pass")) + self.failIf(self.find_binding("a", "class d(a): pass")) + self.failIf(self.find_binding("a", "class d(b, a=7): pass")) + self.failIf(self.find_binding("a", "class d(b, *a): pass")) + self.failIf(self.find_binding("a", "class d(b, **a): pass")) + self.failIf(self.find_binding("a", "class d: a = 7")) + + s = """ + class d(): + class a(): + pass""" + self.failIf(self.find_binding("a", s)) + + def test_for(self): + self.failUnless(self.find_binding("a", "for a in r: pass")) + self.failUnless(self.find_binding("a", "for a, b in r: pass")) + self.failUnless(self.find_binding("a", "for (a, b) in r: pass")) + self.failUnless(self.find_binding("a", "for c, (a,) in r: pass")) + self.failUnless(self.find_binding("a", "for c, (a, b) in r: pass")) + self.failUnless(self.find_binding("a", "for c in r: a = c")) + self.failIf(self.find_binding("a", "for c in a: pass")) + + def test_for_nested(self): + s = """ + for b in r: + for a in b: + pass""" + self.failUnless(self.find_binding("a", s)) + + s = """ + for b in r: + for a, c in b: + pass""" + self.failUnless(self.find_binding("a", s)) + + s = """ + for b in r: + for (a, c) in b: + pass""" + self.failUnless(self.find_binding("a", s)) + + s = """ + for b in r: + for (a,) in b: + pass""" + self.failUnless(self.find_binding("a", s)) + + s = """ + for b in r: + for c, (a, d) in b: + pass""" + self.failUnless(self.find_binding("a", s)) + + s = """ + for b in r: + for c in b: + a = 7""" + self.failUnless(self.find_binding("a", s)) + + s = """ + for b in r: + for c in b: + d = a""" + self.failIf(self.find_binding("a", s)) + + s = """ + for b in r: + for c in a: + d = 7""" + self.failIf(self.find_binding("a", s)) + + def test_if(self): + self.failUnless(self.find_binding("a", "if b in r: a = c")) + self.failIf(self.find_binding("a", "if a in r: d = e")) + + def test_if_nested(self): + s = """ + if b in r: + if c in d: + a = c""" + self.failUnless(self.find_binding("a", s)) + + s = """ + if b in r: + if c in d: + c = a""" + self.failIf(self.find_binding("a", s)) + + def test_while(self): + self.failUnless(self.find_binding("a", "while b in r: a = c")) + self.failIf(self.find_binding("a", "while a in r: d = e")) + + def test_while_nested(self): + s = """ + while b in r: + while c in d: + a = c""" + self.failUnless(self.find_binding("a", s)) + + s = """ + while b in r: + while c in d: + c = a""" + self.failIf(self.find_binding("a", s)) + + def test_try_except(self): + s = """ + try: + a = 6 + except: + b = 8""" + self.failUnless(self.find_binding("a", s)) + + s = """ + try: + b = 8 + except: + a = 6""" + self.failUnless(self.find_binding("a", s)) + + s = """ + try: + b = 8 + except KeyError: + pass + except: + a = 6""" + self.failUnless(self.find_binding("a", s)) + + s = """ + try: + b = 8 + except: + b = 6""" + self.failIf(self.find_binding("a", s)) + + def test_try_except_nested(self): + s = """ + try: + try: + a = 6 + except: + pass + except: + b = 8""" + self.failUnless(self.find_binding("a", s)) + + s = """ + try: + b = 8 + except: + try: + a = 6 + except: + pass""" + self.failUnless(self.find_binding("a", s)) + + s = """ + try: + b = 8 + except: + try: + pass + except: + a = 6""" + self.failUnless(self.find_binding("a", s)) + + s = """ + try: + try: + b = 8 + except KeyError: + pass + except: + a = 6 + except: + pass""" + self.failUnless(self.find_binding("a", s)) + + s = """ + try: + pass + except: + try: + b = 8 + except KeyError: + pass + except: + a = 6""" + self.failUnless(self.find_binding("a", s)) + + s = """ + try: + b = 8 + except: + b = 6""" + self.failIf(self.find_binding("a", s)) + + s = """ + try: + try: + b = 8 + except: + c = d + except: + try: + b = 6 + except: + t = 8 + except: + o = y""" + self.failIf(self.find_binding("a", s)) + + def test_try_except_finally(self): + s = """ + try: + c = 6 + except: + b = 8 + finally: + a = 9""" + self.failUnless(self.find_binding("a", s)) + + s = """ + try: + b = 8 + finally: + a = 6""" + self.failUnless(self.find_binding("a", s)) + + s = """ + try: + b = 8 + finally: + b = 6""" + self.failIf(self.find_binding("a", s)) + + s = """ + try: + b = 8 + except: + b = 9 + finally: + b = 6""" + self.failIf(self.find_binding("a", s)) + + def test_try_except_finally_nested(self): + s = """ + try: + c = 6 + except: + b = 8 + finally: + try: + a = 9 + except: + b = 9 + finally: + c = 9""" + self.failUnless(self.find_binding("a", s)) + + s = """ + try: + b = 8 + finally: + try: + pass + finally: + a = 6""" + self.failUnless(self.find_binding("a", s)) + + s = """ + try: + b = 8 + finally: + try: + b = 6 + finally: + b = 7""" + self.failIf(self.find_binding("a", s)) + + +if __name__ == "__main__": + import __main__ + support.run_all_tests(__main__) |