/Lib/lib2to3/tests/test_util.py
http://unladen-swallow.googlecode.com/ · Python · 559 lines · 461 code · 84 blank · 14 comment · 8 complexity · 34b1ab2a57dada2c15c0b151b66ad03f MD5 · raw file
- #!/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 .. import fixer_util
- from ..fixer_util import Attr, Name
- 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(fixer_util.syms.simple_stmt, node)
- self.assertEqual(str(node), string)
- class Test_is_tuple(support.TestCase):
- def is_tuple(self, string):
- return fixer_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 fixer_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):
- 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):
- attr = Attr(Name("a"), Name("b"))
- self.assertEqual(type(attr), list)
- class Test_Name(MacroTestCase):
- def test(self):
- 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 = fixer_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 fixer_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 fixer_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))
- class Test_touch_import(support.TestCase):
- def test_after_docstring(self):
- node = parse('"""foo"""\nbar()')
- fixer_util.touch_import(None, "foo", node)
- self.assertEqual(str(node), '"""foo"""\nimport foo\nbar()\n\n')
- def test_after_imports(self):
- node = parse('"""foo"""\nimport bar\nbar()')
- fixer_util.touch_import(None, "foo", node)
- self.assertEqual(str(node), '"""foo"""\nimport bar\nimport foo\nbar()\n\n')
- def test_beginning(self):
- node = parse('bar()')
- fixer_util.touch_import(None, "foo", node)
- self.assertEqual(str(node), 'import foo\nbar()\n\n')
- def test_from_import(self):
- node = parse('bar()')
- fixer_util.touch_import("cgi", "escape", node)
- self.assertEqual(str(node), 'from cgi import escape\nbar()\n\n')
- def test_name_import(self):
- node = parse('bar()')
- fixer_util.touch_import(None, "cgi", node)
- self.assertEqual(str(node), 'import cgi\nbar()\n\n')
- if __name__ == "__main__":
- import __main__
- support.run_all_tests(__main__)