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cpython/Lib/lib2to3/tests/test_pytree.py
Benjamin Peterson 608d8bcdfc Merged revisions 72368 via svnmerge from 
svn+ssh://pythondev@svn.python.org/python/trunk

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  r72368 | benjamin.peterson | 2009-05-05 18:13:58 -0500 (Tue, 05 May 2009) | 53 lines

  Merged revisions 68503,68507,68694,69054,69673,69679-69681,70991,70999,71003,71695 via svnmerge from
  svn+ssh://pythondev@svn.python.org/sandbox/trunk/2to3/lib2to3

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    r68503 | benjamin.peterson | 2009-01-10 14:14:49 -0600 (Sat, 10 Jan 2009) | 1 line

    use variable
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    r68507 | benjamin.peterson | 2009-01-10 15:13:16 -0600 (Sat, 10 Jan 2009) | 1 line

    rewrap
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    r68694 | benjamin.peterson | 2009-01-17 17:55:59 -0600 (Sat, 17 Jan 2009) | 1 line

    test for specific node type
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    r69054 | guilherme.polo | 2009-01-28 10:01:54 -0600 (Wed, 28 Jan 2009) | 2 lines

    Added mapping for the ttk module.
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    r69673 | benjamin.peterson | 2009-02-16 09:38:22 -0600 (Mon, 16 Feb 2009) | 1 line

    fix handling of as imports #5279
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    r69679 | benjamin.peterson | 2009-02-16 11:36:06 -0600 (Mon, 16 Feb 2009) | 1 line

    make Base.get_next_sibling() and Base.get_prev_sibling() properties
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    r69680 | benjamin.peterson | 2009-02-16 11:41:48 -0600 (Mon, 16 Feb 2009) | 1 line

    normalize docstrings in pytree according to PEP 11
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    r69681 | benjamin.peterson | 2009-02-16 11:43:09 -0600 (Mon, 16 Feb 2009) | 1 line

    use a set
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    r70991 | benjamin.peterson | 2009-04-01 15:54:50 -0500 (Wed, 01 Apr 2009) | 1 line

    map urllib.urlopen to urllib.request.open #5637
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    r70999 | benjamin.peterson | 2009-04-01 17:36:47 -0500 (Wed, 01 Apr 2009) | 1 line

    add very alpha support to 2to3 for running concurrently with multiprocessing
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    r71003 | benjamin.peterson | 2009-04-01 18:10:43 -0500 (Wed, 01 Apr 2009) | 1 line

    fix when multiprocessing is not available or used
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    r71695 | benjamin.peterson | 2009-04-17 22:21:29 -0500 (Fri, 17 Apr 2009) | 1 line

    refactor multiprocessing support, so it's less hacky to employ and only loads mp when needed
  ........
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2009-05-05 23:23:31 +00:00

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#!/usr/bin/env python2.5
# Copyright 2006 Google, Inc. All Rights Reserved.
# Licensed to PSF under a Contributor Agreement.
"""Unit tests for pytree.py.
NOTE: Please *don't* add doc strings to individual test methods!
In verbose mode, printing of the module, class and method name is much
more helpful than printing of (the first line of) the docstring,
especially when debugging a test.
"""
# Testing imports
from . import support
# Local imports (XXX should become a package)
from .. import pytree
try:
sorted
except NameError:
def sorted(lst):
l = list(lst)
l.sort()
return l
class TestNodes(support.TestCase):
"""Unit tests for nodes (Base, Leaf, Node)."""
def testBaseCantConstruct(self):
if __debug__:
# Test that instantiating Base() raises an AssertionError
self.assertRaises(AssertionError, pytree.Base)
def testLeaf(self):
l1 = pytree.Leaf(100, "foo")
self.assertEqual(l1.type, 100)
self.assertEqual(l1.value, "foo")
def testLeafRepr(self):
l1 = pytree.Leaf(100, "foo")
self.assertEqual(repr(l1), "Leaf(100, 'foo')")
def testLeafStr(self):
l1 = pytree.Leaf(100, "foo")
self.assertEqual(str(l1), "foo")
l2 = pytree.Leaf(100, "foo", context=(" ", (10, 1)))
self.assertEqual(str(l2), " foo")
def testLeafStrNumericValue(self):
# Make sure that the Leaf's value is stringified. Failing to
# do this can cause a TypeError in certain situations.
l1 = pytree.Leaf(2, 5)
l1.set_prefix("foo_")
self.assertEqual(str(l1), "foo_5")
def testLeafEq(self):
l1 = pytree.Leaf(100, "foo")
l2 = pytree.Leaf(100, "foo", context=(" ", (1, 0)))
self.assertEqual(l1, l2)
l3 = pytree.Leaf(101, "foo")
l4 = pytree.Leaf(100, "bar")
self.assertNotEqual(l1, l3)
self.assertNotEqual(l1, l4)
def testLeafPrefix(self):
l1 = pytree.Leaf(100, "foo")
self.assertEqual(l1.get_prefix(), "")
self.failIf(l1.was_changed)
l1.set_prefix(" ##\n\n")
self.assertEqual(l1.get_prefix(), " ##\n\n")
self.failUnless(l1.was_changed)
def testNode(self):
l1 = pytree.Leaf(100, "foo")
l2 = pytree.Leaf(200, "bar")
n1 = pytree.Node(1000, [l1, l2])
self.assertEqual(n1.type, 1000)
self.assertEqual(n1.children, [l1, l2])
def testNodeRepr(self):
l1 = pytree.Leaf(100, "foo")
l2 = pytree.Leaf(100, "bar", context=(" ", (1, 0)))
n1 = pytree.Node(1000, [l1, l2])
self.assertEqual(repr(n1),
"Node(1000, [%s, %s])" % (repr(l1), repr(l2)))
def testNodeStr(self):
l1 = pytree.Leaf(100, "foo")
l2 = pytree.Leaf(100, "bar", context=(" ", (1, 0)))
n1 = pytree.Node(1000, [l1, l2])
self.assertEqual(str(n1), "foo bar")
def testNodePrefix(self):
l1 = pytree.Leaf(100, "foo")
self.assertEqual(l1.get_prefix(), "")
n1 = pytree.Node(1000, [l1])
self.assertEqual(n1.get_prefix(), "")
n1.set_prefix(" ")
self.assertEqual(n1.get_prefix(), " ")
self.assertEqual(l1.get_prefix(), " ")
def testGetSuffix(self):
l1 = pytree.Leaf(100, "foo", prefix="a")
l2 = pytree.Leaf(100, "bar", prefix="b")
n1 = pytree.Node(1000, [l1, l2])
self.assertEqual(l1.get_suffix(), l2.get_prefix())
self.assertEqual(l2.get_suffix(), "")
self.assertEqual(n1.get_suffix(), "")
l3 = pytree.Leaf(100, "bar", prefix="c")
n2 = pytree.Node(1000, [n1, l3])
self.assertEqual(n1.get_suffix(), l3.get_prefix())
self.assertEqual(l3.get_suffix(), "")
self.assertEqual(n2.get_suffix(), "")
def testNodeEq(self):
n1 = pytree.Node(1000, ())
n2 = pytree.Node(1000, [], context=(" ", (1, 0)))
self.assertEqual(n1, n2)
n3 = pytree.Node(1001, ())
self.assertNotEqual(n1, n3)
def testNodeEqRecursive(self):
l1 = pytree.Leaf(100, "foo")
l2 = pytree.Leaf(100, "foo")
n1 = pytree.Node(1000, [l1])
n2 = pytree.Node(1000, [l2])
self.assertEqual(n1, n2)
l3 = pytree.Leaf(100, "bar")
n3 = pytree.Node(1000, [l3])
self.assertNotEqual(n1, n3)
def testReplace(self):
l1 = pytree.Leaf(100, "foo")
l2 = pytree.Leaf(100, "+")
l3 = pytree.Leaf(100, "bar")
n1 = pytree.Node(1000, [l1, l2, l3])
self.assertEqual(n1.children, [l1, l2, l3])
self.failUnless(isinstance(n1.children, list))
self.failIf(n1.was_changed)
l2new = pytree.Leaf(100, "-")
l2.replace(l2new)
self.assertEqual(n1.children, [l1, l2new, l3])
self.failUnless(isinstance(n1.children, list))
self.failUnless(n1.was_changed)
def testReplaceWithList(self):
l1 = pytree.Leaf(100, "foo")
l2 = pytree.Leaf(100, "+")
l3 = pytree.Leaf(100, "bar")
n1 = pytree.Node(1000, [l1, l2, l3])
l2.replace([pytree.Leaf(100, "*"), pytree.Leaf(100, "*")])
self.assertEqual(str(n1), "foo**bar")
self.failUnless(isinstance(n1.children, list))
def testPostOrder(self):
l1 = pytree.Leaf(100, "foo")
l2 = pytree.Leaf(100, "bar")
n1 = pytree.Node(1000, [l1, l2])
self.assertEqual(list(n1.post_order()), [l1, l2, n1])
def testPreOrder(self):
l1 = pytree.Leaf(100, "foo")
l2 = pytree.Leaf(100, "bar")
n1 = pytree.Node(1000, [l1, l2])
self.assertEqual(list(n1.pre_order()), [n1, l1, l2])
def testChangedLeaf(self):
l1 = pytree.Leaf(100, "f")
self.failIf(l1.was_changed)
l1.changed()
self.failUnless(l1.was_changed)
def testChangedNode(self):
l1 = pytree.Leaf(100, "f")
n1 = pytree.Node(1000, [l1])
self.failIf(n1.was_changed)
n1.changed()
self.failUnless(n1.was_changed)
def testChangedRecursive(self):
l1 = pytree.Leaf(100, "foo")
l2 = pytree.Leaf(100, "+")
l3 = pytree.Leaf(100, "bar")
n1 = pytree.Node(1000, [l1, l2, l3])
n2 = pytree.Node(1000, [n1])
self.failIf(l1.was_changed)
self.failIf(n1.was_changed)
self.failIf(n2.was_changed)
n1.changed()
self.failUnless(n1.was_changed)
self.failUnless(n2.was_changed)
self.failIf(l1.was_changed)
def testLeafConstructorPrefix(self):
for prefix in ("xyz_", ""):
l1 = pytree.Leaf(100, "self", prefix=prefix)
self.failUnless(str(l1), prefix + "self")
self.assertEqual(l1.get_prefix(), prefix)
def testNodeConstructorPrefix(self):
for prefix in ("xyz_", ""):
l1 = pytree.Leaf(100, "self")
l2 = pytree.Leaf(100, "foo", prefix="_")
n1 = pytree.Node(1000, [l1, l2], prefix=prefix)
self.failUnless(str(n1), prefix + "self_foo")
self.assertEqual(n1.get_prefix(), prefix)
self.assertEqual(l1.get_prefix(), prefix)
self.assertEqual(l2.get_prefix(), "_")
def testRemove(self):
l1 = pytree.Leaf(100, "foo")
l2 = pytree.Leaf(100, "foo")
n1 = pytree.Node(1000, [l1, l2])
n2 = pytree.Node(1000, [n1])
self.assertEqual(n1.remove(), 0)
self.assertEqual(n2.children, [])
self.assertEqual(l1.parent, n1)
self.assertEqual(n1.parent, None)
self.assertEqual(n2.parent, None)
self.failIf(n1.was_changed)
self.failUnless(n2.was_changed)
self.assertEqual(l2.remove(), 1)
self.assertEqual(l1.remove(), 0)
self.assertEqual(n1.children, [])
self.assertEqual(l1.parent, None)
self.assertEqual(n1.parent, None)
self.assertEqual(n2.parent, None)
self.failUnless(n1.was_changed)
self.failUnless(n2.was_changed)
def testRemoveParentless(self):
n1 = pytree.Node(1000, [])
n1.remove()
self.assertEqual(n1.parent, None)
l1 = pytree.Leaf(100, "foo")
l1.remove()
self.assertEqual(l1.parent, None)
def testNodeSetChild(self):
l1 = pytree.Leaf(100, "foo")
n1 = pytree.Node(1000, [l1])
l2 = pytree.Leaf(100, "bar")
n1.set_child(0, l2)
self.assertEqual(l1.parent, None)
self.assertEqual(l2.parent, n1)
self.assertEqual(n1.children, [l2])
n2 = pytree.Node(1000, [l1])
n2.set_child(0, n1)
self.assertEqual(l1.parent, None)
self.assertEqual(n1.parent, n2)
self.assertEqual(n2.parent, None)
self.assertEqual(n2.children, [n1])
self.assertRaises(IndexError, n1.set_child, 4, l2)
# I don't care what it raises, so long as it's an exception
self.assertRaises(Exception, n1.set_child, 0, list)
def testNodeInsertChild(self):
l1 = pytree.Leaf(100, "foo")
n1 = pytree.Node(1000, [l1])
l2 = pytree.Leaf(100, "bar")
n1.insert_child(0, l2)
self.assertEqual(l2.parent, n1)
self.assertEqual(n1.children, [l2, l1])
l3 = pytree.Leaf(100, "abc")
n1.insert_child(2, l3)
self.assertEqual(n1.children, [l2, l1, l3])
# I don't care what it raises, so long as it's an exception
self.assertRaises(Exception, n1.insert_child, 0, list)
def testNodeAppendChild(self):
n1 = pytree.Node(1000, [])
l1 = pytree.Leaf(100, "foo")
n1.append_child(l1)
self.assertEqual(l1.parent, n1)
self.assertEqual(n1.children, [l1])
l2 = pytree.Leaf(100, "bar")
n1.append_child(l2)
self.assertEqual(l2.parent, n1)
self.assertEqual(n1.children, [l1, l2])
# I don't care what it raises, so long as it's an exception
self.assertRaises(Exception, n1.append_child, list)
def testNodeNextSibling(self):
n1 = pytree.Node(1000, [])
n2 = pytree.Node(1000, [])
p1 = pytree.Node(1000, [n1, n2])
self.failUnless(n1.next_sibling is n2)
self.assertEqual(n2.next_sibling, None)
self.assertEqual(p1.next_sibling, None)
def testLeafNextSibling(self):
l1 = pytree.Leaf(100, "a")
l2 = pytree.Leaf(100, "b")
p1 = pytree.Node(1000, [l1, l2])
self.failUnless(l1.next_sibling is l2)
self.assertEqual(l2.next_sibling, None)
self.assertEqual(p1.next_sibling, None)
def testNodePrevSibling(self):
n1 = pytree.Node(1000, [])
n2 = pytree.Node(1000, [])
p1 = pytree.Node(1000, [n1, n2])
self.failUnless(n2.prev_sibling is n1)
self.assertEqual(n1.prev_sibling, None)
self.assertEqual(p1.prev_sibling, None)
def testLeafPrevSibling(self):
l1 = pytree.Leaf(100, "a")
l2 = pytree.Leaf(100, "b")
p1 = pytree.Node(1000, [l1, l2])
self.failUnless(l2.prev_sibling is l1)
self.assertEqual(l1.prev_sibling, None)
self.assertEqual(p1.prev_sibling, None)
class TestPatterns(support.TestCase):
"""Unit tests for tree matching patterns."""
def testBasicPatterns(self):
# Build a tree
l1 = pytree.Leaf(100, "foo")
l2 = pytree.Leaf(100, "bar")
l3 = pytree.Leaf(100, "foo")
n1 = pytree.Node(1000, [l1, l2])
n2 = pytree.Node(1000, [l3])
root = pytree.Node(1000, [n1, n2])
# Build a pattern matching a leaf
pl = pytree.LeafPattern(100, "foo", name="pl")
r = {}
self.assertFalse(pl.match(root, results=r))
self.assertEqual(r, {})
self.assertFalse(pl.match(n1, results=r))
self.assertEqual(r, {})
self.assertFalse(pl.match(n2, results=r))
self.assertEqual(r, {})
self.assertTrue(pl.match(l1, results=r))
self.assertEqual(r, {"pl": l1})
r = {}
self.assertFalse(pl.match(l2, results=r))
self.assertEqual(r, {})
# Build a pattern matching a node
pn = pytree.NodePattern(1000, [pl], name="pn")
self.assertFalse(pn.match(root, results=r))
self.assertEqual(r, {})
self.assertFalse(pn.match(n1, results=r))
self.assertEqual(r, {})
self.assertTrue(pn.match(n2, results=r))
self.assertEqual(r, {"pn": n2, "pl": l3})
r = {}
self.assertFalse(pn.match(l1, results=r))
self.assertEqual(r, {})
self.assertFalse(pn.match(l2, results=r))
self.assertEqual(r, {})
def testWildcardPatterns(self):
# Build a tree for testing
l1 = pytree.Leaf(100, "foo")
l2 = pytree.Leaf(100, "bar")
l3 = pytree.Leaf(100, "foo")
n1 = pytree.Node(1000, [l1, l2])
n2 = pytree.Node(1000, [l3])
root = pytree.Node(1000, [n1, n2])
# Build a pattern
pl = pytree.LeafPattern(100, "foo", name="pl")
pn = pytree.NodePattern(1000, [pl], name="pn")
pw = pytree.WildcardPattern([[pn], [pl, pl]], name="pw")
r = {}
self.assertFalse(pw.match_seq([root], r))
self.assertEqual(r, {})
self.assertFalse(pw.match_seq([n1], r))
self.assertEqual(r, {})
self.assertTrue(pw.match_seq([n2], r))
# These are easier to debug
self.assertEqual(sorted(r.keys()), ["pl", "pn", "pw"])
self.assertEqual(r["pl"], l1)
self.assertEqual(r["pn"], n2)
self.assertEqual(r["pw"], [n2])
# But this is equivalent
self.assertEqual(r, {"pl": l1, "pn": n2, "pw": [n2]})
r = {}
self.assertTrue(pw.match_seq([l1, l3], r))
self.assertEqual(r, {"pl": l3, "pw": [l1, l3]})
self.assert_(r["pl"] is l3)
r = {}
def testGenerateMatches(self):
la = pytree.Leaf(1, "a")
lb = pytree.Leaf(1, "b")
lc = pytree.Leaf(1, "c")
ld = pytree.Leaf(1, "d")
le = pytree.Leaf(1, "e")
lf = pytree.Leaf(1, "f")
leaves = [la, lb, lc, ld, le, lf]
root = pytree.Node(1000, leaves)
pa = pytree.LeafPattern(1, "a", "pa")
pb = pytree.LeafPattern(1, "b", "pb")
pc = pytree.LeafPattern(1, "c", "pc")
pd = pytree.LeafPattern(1, "d", "pd")
pe = pytree.LeafPattern(1, "e", "pe")
pf = pytree.LeafPattern(1, "f", "pf")
pw = pytree.WildcardPattern([[pa, pb, pc], [pd, pe],
[pa, pb], [pc, pd], [pe, pf]],
min=1, max=4, name="pw")
self.assertEqual([x[0] for x in pw.generate_matches(leaves)],
[3, 5, 2, 4, 6])
pr = pytree.NodePattern(type=1000, content=[pw], name="pr")
matches = list(pytree.generate_matches([pr], [root]))
self.assertEqual(len(matches), 1)
c, r = matches[0]
self.assertEqual(c, 1)
self.assertEqual(str(r["pr"]), "abcdef")
self.assertEqual(r["pw"], [la, lb, lc, ld, le, lf])
for c in "abcdef":
self.assertEqual(r["p" + c], pytree.Leaf(1, c))
def testHasKeyExample(self):
pattern = pytree.NodePattern(331,
(pytree.LeafPattern(7),
pytree.WildcardPattern(name="args"),
pytree.LeafPattern(8)))
l1 = pytree.Leaf(7, "(")
l2 = pytree.Leaf(3, "x")
l3 = pytree.Leaf(8, ")")
node = pytree.Node(331, [l1, l2, l3])
r = {}
self.assert_(pattern.match(node, r))
self.assertEqual(r["args"], [l2])
if __name__ == "__main__":
import __main__
support.run_all_tests(__main__)
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