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A Python parser for MediaWiki wikicode https://mwparserfromhell.readthedocs.io/
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mwparserfromhell/tests/test_smart_list.py

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  1. # -*- coding: utf-8  -*-

  2. #

  3. # Copyright (C) 2012-2016 Ben Kurtovic <ben.kurtovic@gmail.com>

  4. #

  5. # Permission is hereby granted, free of charge, to any person obtaining a copy

  6. # of this software and associated documentation files (the "Software"), to deal

  7. # in the Software without restriction, including without limitation the rights

  8. # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

  9. # copies of the Software, and to permit persons to whom the Software is

  10. # furnished to do so, subject to the following conditions:

  11. #

  12. # The above copyright notice and this permission notice shall be included in

  13. # all copies or substantial portions of the Software.

  14. #

  15. # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

  16. # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

  17. # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

  18. # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

  19. # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

  20. # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

  21. # SOFTWARE.

  22. 

  23. from __future__ import unicode_literals

  24. 

  25. import unittest

  26. 

  27. from mwparserfromhell.compat import py3k, range

  28. from mwparserfromhell.smart_list import SmartList, _ListProxy

  29. 

  30. 

  31. class TestSmartList(unittest.TestCase):

  32.     """Test cases for the SmartList class and its child, _ListProxy."""

  33. 

  34.     def _test_get_set_del_item(self, builder, assertEqualIter):

  35.         """Run tests on __get/set/delitem__ of a list built with *builder*."""

  36.         def assign(L, s1, s2, s3, val):

  37.             L[s1:s2:s3] = val

  38. 

  39.         def delete(L, s1):

  40.             del L[s1]

  41. 

  42.         list1 = builder([0, 1, 2, 3, "one", "two"])

  43.         list2 = builder(list(range(10)))

  44. 

  45.         self.assertEqual(1, list1[1])

  46.         self.assertEqual("one", list1[-2])

  47.         assertEqualIter([2, 3], list1[2:4])

  48.         self.assertRaises(IndexError, lambda: list1[6])

  49.         self.assertRaises(IndexError, lambda: list1[-7])

  50. 

  51.         assertEqualIter([0, 1, 2], list1[:3])

  52.         assertEqualIter([0, 1, 2, 3, "one", "two"], list1[:])

  53.         assertEqualIter([3, "one", "two"], list1[3:])

  54.         assertEqualIter([3, "one", "two"], list1[3:100])

  55.         assertEqualIter(["one", "two"], list1[-2:])

  56.         assertEqualIter([0, 1], list1[:-4])

  57.         assertEqualIter([], list1[6:])

  58.         assertEqualIter([], list1[4:2])

  59. 

  60.         assertEqualIter([0, 2, "one"], list1[0:5:2])

  61.         assertEqualIter([0, 2], list1[0:-3:2])

  62.         assertEqualIter([0, 1, 2, 3, "one", "two"], list1[::])

  63.         assertEqualIter([2, 3, "one", "two"], list1[2::])

  64.         assertEqualIter([0, 1, 2, 3], list1[:4:])

  65.         assertEqualIter([2, 3], list1[2:4:])

  66.         assertEqualIter([0, 2, 4, 6, 8], list2[::2])

  67.         assertEqualIter([2, 5, 8], list2[2::3])

  68.         assertEqualIter([0, 3], list2[:6:3])

  69.         assertEqualIter([2, 5, 8], list2[-8:9:3])

  70.         assertEqualIter([], list2[100000:1000:-100])

  71. 

  72.         list1[3] = 100

  73.         self.assertEqual(100, list1[3])

  74.         list1[-3] = 101

  75.         assertEqualIter([0, 1, 2, 101, "one", "two"], list1)

  76.         list1[5:] = [6, 7, 8]

  77.         assertEqualIter([6, 7, 8], list1[5:])

  78.         assertEqualIter([0, 1, 2, 101, "one", 6, 7, 8], list1)

  79.         list1[2:4] = [-1, -2, -3, -4, -5]

  80.         assertEqualIter([0, 1, -1, -2, -3, -4, -5, "one", 6, 7, 8], list1)

  81.         list1[0:-3] = [99]

  82.         assertEqualIter([99, 6, 7, 8], list1)

  83.         list2[0:6:2] = [100, 102, 104]

  84.         assertEqualIter([100, 1, 102, 3, 104, 5, 6, 7, 8, 9], list2)

  85.         list2[::3] = [200, 203, 206, 209]

  86.         assertEqualIter([200, 1, 102, 203, 104, 5, 206, 7, 8, 209], list2)

  87.         list2[::] = range(7)

  88.         assertEqualIter([0, 1, 2, 3, 4, 5, 6], list2)

  89.         self.assertRaises(ValueError, assign, list2, 0, 5, 2,

  90.                           [100, 102, 104, 106])

  91.         with self.assertRaises(IndexError):

  92.             list2[7] = "foo"

  93.         with self.assertRaises(IndexError):

  94.             list2[-8] = "foo"

  95. 

  96.         del list2[2]

  97.         assertEqualIter([0, 1, 3, 4, 5, 6], list2)

  98.         del list2[-3]

  99.         assertEqualIter([0, 1, 3, 5, 6], list2)

  100.         self.assertRaises(IndexError, delete, list2, 100)

  101.         self.assertRaises(IndexError, delete, list2, -6)

  102.         list2[:] = range(10)

  103.         del list2[3:6]

  104.         assertEqualIter([0, 1, 2, 6, 7, 8, 9], list2)

  105.         del list2[-2:]

  106.         assertEqualIter([0, 1, 2, 6, 7], list2)

  107.         del list2[:2]

  108.         assertEqualIter([2, 6, 7], list2)

  109.         list2[:] = range(10)

  110.         del list2[2:8:2]

  111.         assertEqualIter([0, 1, 3, 5, 7, 8, 9], list2)

  112. 

  113.     def _test_add_radd_iadd(self, builder, assertEqualIter):

  114.         """Run tests on __r/i/add__ of a list built with *builder*."""

  115.         list1 = builder(range(5))

  116.         list2 = builder(range(5, 10))

  117.         assertEqualIter([0, 1, 2, 3, 4, 5, 6], list1 + [5, 6])

  118.         assertEqualIter([0, 1, 2, 3, 4], list1)

  119.         self.assertEqual(list(range(10)), list1 + list2)

  120.         assertEqualIter([-2, -1, 0, 1, 2, 3, 4], [-2, -1] + list1)

  121.         assertEqualIter([0, 1, 2, 3, 4], list1)

  122.         list1 += ["foo", "bar", "baz"]

  123.         assertEqualIter([0, 1, 2, 3, 4, "foo", "bar", "baz"], list1)

  124. 

  125.     def _test_other_magic_methods(self, builder, assertEqualIter):

  126.         """Run tests on other magic methods of a list built with *builder*."""

  127.         list1 = builder([0, 1, 2, 3, "one", "two"])

  128.         list2 = builder([])

  129.         list3 = builder([0, 2, 3, 4])

  130.         list4 = builder([0, 1, 2])

  131. 

  132.         if py3k:

  133.             self.assertEqual("[0, 1, 2, 3, 'one', 'two']", str(list1))

  134.             self.assertEqual(b"\x00\x01\x02", bytes(list4))

  135.             self.assertEqual("[0, 1, 2, 3, 'one', 'two']", repr(list1))

  136.         else:

  137.             self.assertEqual("[0, 1, 2, 3, u'one', u'two']", unicode(list1))

  138.             self.assertEqual(b"[0, 1, 2, 3, u'one', u'two']", str(list1))

  139.             self.assertEqual(b"[0, 1, 2, 3, u'one', u'two']", repr(list1))

  140. 

  141.         self.assertLess(list1, list3)

  142.         self.assertLessEqual(list1, list3)

  143.         self.assertNotEqual(list1, list3)

  144.         self.assertNotEqual(list1, list3)

  145.         self.assertLessEqual(list1, list3)

  146.         self.assertLess(list1, list3)

  147. 

  148.         other1 = [0, 2, 3, 4]

  149.         self.assertLess(list1, other1)

  150.         self.assertLessEqual(list1, other1)

  151.         self.assertNotEqual(list1, other1)

  152.         self.assertNotEqual(list1, other1)

  153.         self.assertLessEqual(list1, other1)

  154.         self.assertLess(list1, other1)

  155. 

  156.         other2 = [0, 0, 1, 2]

  157.         self.assertGreaterEqual(list1, other2)

  158.         self.assertGreater(list1, other2)

  159.         self.assertNotEqual(list1, other2)

  160.         self.assertNotEqual(list1, other2)

  161.         self.assertGreater(list1, other2)

  162.         self.assertGreaterEqual(list1, other2)

  163. 

  164.         other3 = [0, 1, 2, 3, "one", "two"]

  165.         self.assertGreaterEqual(list1, other3)

  166.         self.assertLessEqual(list1, other3)

  167.         assertEqualIter(list1, other3)

  168.         assertEqualIter(list1, other3)

  169.         self.assertLessEqual(list1, other3)

  170.         self.assertGreaterEqual(list1, other3)

  171. 

  172.         self.assertTrue(bool(list1))

  173.         self.assertFalse(bool(list2))

  174. 

  175.         self.assertEqual(6, len(list1))

  176.         self.assertEqual(0, len(list2))

  177. 

  178.         out = []

  179.         for obj in list1:

  180.             out.append(obj)

  181.         assertEqualIter([0, 1, 2, 3, "one", "two"], out)

  182. 

  183.         out = []

  184.         for ch in list2:

  185.             out.append(ch)

  186.         assertEqualIter([], out)

  187. 

  188.         gen1 = iter(list1)

  189.         out = []

  190.         for i in range(len(list1)):

  191.             out.append(next(gen1))

  192.         self.assertRaises(StopIteration, next, gen1)

  193.         assertEqualIter([0, 1, 2, 3, "one", "two"], out)

  194.         gen2 = iter(list2)

  195.         self.assertRaises(StopIteration, next, gen2)

  196. 

  197.         # TODO: might need to test an iterator rather than list

  198.         assertEqualIter(["two", "one", 3, 2, 1, 0], list(reversed(list1)))

  199.         assertEqualIter([], list(reversed(list2)))

  200. 

  201.         self.assertIn("one", list1)

  202.         self.assertIn(3, list1)

  203.         self.assertNotIn(10, list1)

  204.         self.assertNotIn(0, list2)

  205. 

  206.         assertEqualIter([], list2 * 5)

  207.         assertEqualIter([], 5 * list2)

  208.         assertEqualIter([0, 1, 2, 0, 1, 2, 0, 1, 2], list4 * 3)

  209.         assertEqualIter([0, 1, 2, 0, 1, 2, 0, 1, 2], 3 * list4)

  210.         list4 *= 2

  211.         assertEqualIter([0, 1, 2, 0, 1, 2], list4)

  212. 

  213.     def _test_list_methods(self, builder, assertEqualIter):

  214.         """Run tests on the public methods of a list built with *builder*."""

  215.         list1 = builder(range(5))

  216.         list2 = builder(["foo"])

  217.         list3 = builder([("a", 5), ("d", 2), ("b", 8), ("c", 3)])

  218. 

  219.         list1.append(5)

  220.         list1.append(1)

  221.         list1.append(2)

  222.         assertEqualIter([0, 1, 2, 3, 4, 5, 1, 2], list1)

  223. 

  224.         self.assertEqual(0, list1.count(6))

  225.         self.assertEqual(2, list1.count(1))

  226. 

  227.         list1.extend(range(5, 8))

  228.         assertEqualIter([0, 1, 2, 3, 4, 5, 1, 2, 5, 6, 7], list1)

  229. 

  230.         self.assertEqual(1, list1.index(1))

  231.         self.assertEqual(6, list1.index(1, 3))

  232.         self.assertEqual(6, list1.index(1, 3, 7))

  233.         self.assertRaises(ValueError, list1.index, 1, 3, 5)

  234. 

  235.         list1.insert(0, -1)

  236.         assertEqualIter([-1, 0, 1, 2, 3, 4, 5, 1, 2, 5, 6, 7], list1)

  237.         list1.insert(-1, 6.5)

  238.         assertEqualIter([-1, 0, 1, 2, 3, 4, 5, 1, 2, 5, 6, 6.5, 7], list1)

  239.         list1.insert(13, 8)

  240.         assertEqualIter([-1, 0, 1, 2, 3, 4, 5, 1, 2, 5, 6, 6.5, 7, 8], list1)

  241. 

  242.         self.assertEqual(8, list1.pop())

  243.         self.assertEqual(7, list1.pop())

  244.         assertEqualIter([-1, 0, 1, 2, 3, 4, 5, 1, 2, 5, 6, 6.5], list1)

  245.         self.assertEqual(-1, list1.pop(0))

  246.         self.assertEqual(5, list1.pop(5))

  247.         self.assertEqual(6.5, list1.pop(-1))

  248.         assertEqualIter([0, 1, 2, 3, 4, 1, 2, 5, 6], list1)

  249.         self.assertEqual("foo", list2.pop())

  250.         self.assertRaises(IndexError, list2.pop)

  251.         assertEqualIter([], list2)

  252. 

  253.         list1.remove(6)

  254.         assertEqualIter([0, 1, 2, 3, 4, 1, 2, 5], list1)

  255.         list1.remove(1)

  256.         assertEqualIter([0, 2, 3, 4, 1, 2, 5], list1)

  257.         list1.remove(1)

  258.         assertEqualIter([0, 2, 3, 4, 2, 5], list1)

  259.         self.assertRaises(ValueError, list1.remove, 1)

  260. 

  261.         list1.reverse()

  262.         assertEqualIter([5, 2, 4, 3, 2, 0], list1)

  263. 

  264.         list1.sort()

  265.         assertEqualIter([0, 2, 2, 3, 4, 5], list1)

  266.         list1.sort(reverse=True)

  267.         assertEqualIter([5, 4, 3, 2, 2, 0], list1)

  268.         if not py3k:

  269.             func = lambda x, y: abs(3 - x) - abs(3 - y)  # Distance from 3

  270.             list1.sort(cmp=func)

  271.             assertEqualIter([3, 4, 2, 2, 5, 0], list1)

  272.             list1.sort(cmp=func, reverse=True)

  273.             assertEqualIter([0, 5, 4, 2, 2, 3], list1)

  274.         list3.sort(key=lambda i: i[1])

  275.         assertEqualIter([("d", 2), ("c", 3), ("a", 5), ("b", 8)], list3)

  276.         list3.sort(key=lambda i: i[1], reverse=True)

  277.         assertEqualIter([("b", 8), ("a", 5), ("c", 3), ("d", 2)], list3)

  278. 

  279.     @staticmethod

  280.     def _dispatch_test_for_children(meth, assertEqualIter):

  281.         """Run a test method on various different types of children."""

  282.         meth(lambda L: SmartList(list(L))[:], assertEqualIter)

  283.         meth(lambda L: SmartList([999] + list(L))[1:], assertEqualIter)

  284.         meth(lambda L: SmartList(list(L) + [999])[:-1], assertEqualIter)

  285.         meth(lambda L: SmartList([101, 102] + list(L) + [201, 202])[2:-2], assertEqualIter)

  286. 

  287.     def test_docs(self):

  288.         """make sure the methods of SmartList/_ListProxy have docstrings"""

  289.         methods = ["append", "count", "extend", "index", "insert", "pop",

  290.                    "remove", "reverse", "sort"]

  291.         for meth in methods:

  292.             expected = getattr(list, meth).__doc__

  293.             smartlist_doc = getattr(SmartList, meth).__doc__

  294.             listproxy_doc = getattr(_ListProxy, meth).__doc__

  295.             self.assertEqual(expected, smartlist_doc)

  296.             self.assertEqual(expected, listproxy_doc)

  297. 

  298.     def test_doctest(self):

  299.         """make sure the test embedded in SmartList's docstring passes"""

  300.         parent = SmartList([0, 1, 2, 3])

  301.         self.assertEqual([0, 1, 2, 3], parent)

  302.         child = parent[2:]

  303.         self.assertEqual([2, 3], child)

  304.         child.append(4)

  305.         self.assertEqual([2, 3, 4], child)

  306.         self.assertEqual([0, 1, 2, 3, 4], parent)

  307. 

  308.     def test_parent_get_set_del(self):

  309.         """make sure SmartList's getitem/setitem/delitem work"""

  310.         self._test_get_set_del_item(SmartList, self.assertEqual)

  311.         self._test_get_set_del_item(SmartList, self.assertEqualIterator)

  312. 

  313.     def test_parent_add(self):

  314.         """make sure SmartList's add/radd/iadd work"""

  315.         self._test_add_radd_iadd(SmartList, self.assertEqual)

  316.         self._test_add_radd_iadd(SmartList, self.assertEqualIterator)

  317. 

  318.     def test_parent_other_magics(self):

  319.         """make sure SmartList's other magically implemented features work"""

  320.         self._test_other_magic_methods(SmartList, self.assertEqual)

  321.         self._test_other_magic_methods(SmartList, self.assertEqualIterator)

  322. 

  323.     def test_parent_methods(self):

  324.         """make sure SmartList's non-magic methods work, like append()"""

  325.         self._test_list_methods(SmartList, self.assertEqual)

  326.         self._test_list_methods(SmartList, self.assertEqualIterator)

  327. 

  328.     def test_child_get_set_del(self):

  329.         """make sure _ListProxy's getitem/setitem/delitem work"""

  330.         self._dispatch_test_for_children(self._test_get_set_del_item, self.assertEqual)

  331.         self._dispatch_test_for_children(self._test_get_set_del_item, self.assertEqualIterator)

  332. 

  333.     def test_child_add(self):

  334.         """make sure _ListProxy's add/radd/iadd work"""

  335.         self._dispatch_test_for_children(self._test_add_radd_iadd, self.assertEqual)

  336.         self._dispatch_test_for_children(self._test_add_radd_iadd, self.assertEqualIterator)

  337. 

  338.     def test_child_other_magics(self):

  339.         """make sure _ListProxy's other magically implemented features work"""

  340.         self._dispatch_test_for_children(self._test_other_magic_methods, self.assertEqual)

  341.         self._dispatch_test_for_children(self._test_other_magic_methods, self.assertEqualIterator)

  342. 

  343.     def test_child_methods(self):

  344.         """make sure _ListProxy's non-magic methods work, like append()"""

  345.         self._dispatch_test_for_children(self._test_list_methods, self.assertEqual)

  346.         self._dispatch_test_for_children(self._test_list_methods, self.assertEqualIterator)

  347. 

  348.     def _test_influence(self, assertEqualIter):

  349.         """make sure changes are propagated from parents to children"""

  350.         parent = SmartList([0, 1, 2, 3, 4, 5])

  351.         child1 = parent[2:]

  352.         child2 = parent[2:5]

  353.         assertEqualIter([0, 1, 2, 3, 4, 5], parent)

  354.         assertEqualIter([2, 3, 4, 5], child1)

  355.         assertEqualIter([2, 3, 4], child2)

  356.         self.assertEqual(2, len(parent._children))

  357. 

  358.         parent.append(6)

  359.         child1.append(7)

  360.         child2.append(4.5)

  361.         assertEqualIter([0, 1, 2, 3, 4, 4.5, 5, 6, 7], parent)

  362.         assertEqualIter([2, 3, 4, 4.5, 5, 6, 7], child1)

  363.         assertEqualIter([2, 3, 4, 4.5], child2)

  364. 

  365.         parent.insert(0, -1)

  366.         parent.insert(4, 2.5)

  367.         parent.insert(10, 6.5)

  368.         assertEqualIter([-1, 0, 1, 2, 2.5, 3, 4, 4.5, 5, 6, 6.5, 7], parent)

  369.         assertEqualIter([2, 2.5, 3, 4, 4.5, 5, 6, 6.5, 7], child1)

  370.         assertEqualIter([2, 2.5, 3, 4, 4.5], child2)

  371. 

  372.         self.assertEqual(7, parent.pop())

  373.         self.assertEqual(6.5, child1.pop())

  374.         self.assertEqual(4.5, child2.pop())

  375.         assertEqualIter([-1, 0, 1, 2, 2.5, 3, 4, 5, 6], parent)

  376.         assertEqualIter([2, 2.5, 3, 4, 5, 6], child1)

  377.         assertEqualIter([2, 2.5, 3, 4], child2)

  378. 

  379.         parent.remove(-1)

  380.         child1.remove(2.5)

  381.         assertEqualIter([0, 1, 2, 3, 4, 5, 6], parent)

  382.         assertEqualIter([2, 3, 4, 5, 6], child1)

  383.         assertEqualIter([2, 3, 4], child2)

  384. 

  385.         self.assertEqual(0, parent.pop(0))

  386.         assertEqualIter([1, 2, 3, 4, 5, 6], parent)

  387.         assertEqualIter([2, 3, 4, 5, 6], child1)

  388.         assertEqualIter([2, 3, 4], child2)

  389. 

  390.         child2.reverse()

  391.         assertEqualIter([1, 4, 3, 2, 5, 6], parent)

  392.         assertEqualIter([4, 3, 2, 5, 6], child1)

  393.         assertEqualIter([4, 3, 2], child2)

  394. 

  395.         parent.extend([7, 8])

  396.         child1.extend([8.1, 8.2])

  397.         child2.extend([1.9, 1.8])

  398.         assertEqualIter([1, 4, 3, 2, 1.9, 1.8, 5, 6, 7, 8, 8.1, 8.2], parent)

  399.         assertEqualIter([4, 3, 2, 1.9, 1.8, 5, 6, 7, 8, 8.1, 8.2], child1)

  400.         assertEqualIter([4, 3, 2, 1.9, 1.8], child2)

  401. 

  402.         child3 = parent[9:]

  403.         assertEqualIter([8, 8.1, 8.2], child3)

  404. 

  405.         del parent[8:]

  406.         assertEqualIter([1, 4, 3, 2, 1.9, 1.8, 5, 6], parent)

  407.         assertEqualIter([4, 3, 2, 1.9, 1.8, 5, 6], child1)

  408.         assertEqualIter([4, 3, 2, 1.9, 1.8], child2)

  409.         assertEqualIter([], child3)

  410.         self.assertEqual(0, len(child3))

  411. 

  412.         del child1

  413.         assertEqualIter([1, 4, 3, 2, 1.9, 1.8, 5, 6], parent)

  414.         assertEqualIter([4, 3, 2, 1.9, 1.8], child2)

  415.         assertEqualIter([], child3)

  416.         self.assertEqual(2, len(parent._children))

  417. 

  418.         del child3

  419.         assertEqualIter([1, 4, 3, 2, 1.9, 1.8, 5, 6], parent)

  420.         assertEqualIter([4, 3, 2, 1.9, 1.8], child2)

  421.         self.assertEqual(1, len(parent._children))

  422. 

  423.         parent.remove(1.9)

  424.         parent.remove(1.8)

  425.         assertEqualIter([1, 4, 3, 2, 5, 6], parent)

  426.         assertEqualIter([4, 3, 2], child2)

  427. 

  428.         parent.reverse()

  429.         assertEqualIter([6, 5, 2, 3, 4, 1], parent)

  430.         assertEqualIter([4, 3, 2], child2)

  431.         self.assertEqual(0, len(parent._children))

  432. 

  433.     def test_influence(self):

  434.         self._test_influence(self.assertEqual)

  435.         self._test_influence(self.assertEqualIterator)

  436. 

  437.     @staticmethod

  438.     def _test_get_slice(builder, assertEqualIter):

  439.         lst = builder([0, 1, 2])

  440.         assertEqualIter(lst, [0, 1, 2])

  441.         assertEqualIter(lst[:], [0, 1, 2])

  442.         assertEqualIter(lst[0:0], [])

  443.         assertEqualIter(lst[0:1], [0])

  444.         assertEqualIter(lst[0:2], [0, 1])

  445.         assertEqualIter(lst[0:3], [0, 1, 2])

  446.         assertEqualIter(lst[0:4], [0, 1, 2])  # bug in iteration

  447.         assertEqualIter(lst[0:], [0, 1, 2])

  448.         assertEqualIter(lst[1:1], [])

  449.         assertEqualIter(lst[1:2], [1])

  450.         assertEqualIter(lst[1:3], [1, 2])

  451.         assertEqualIter(lst[1:4], [1, 2])  # bug in iteration

  452.         assertEqualIter(lst[1:], [1, 2])

  453.         assertEqualIter(lst[2:], [2])

  454.         assertEqualIter(lst[3:], [])

  455.         assertEqualIter(lst[4:], [])

  456.         assertEqualIter(lst[-1:], [2])

  457.         assertEqualIter(lst[-2:], [1, 2])

  458.         assertEqualIter(lst[-3:], [0, 1, 2])

  459.         assertEqualIter(lst[-4:], [0, 1, 2])  # bug in list and iteration

  460.         assertEqualIter(lst[:-1], [0, 1])

  461.         assertEqualIter(lst[:-2], [0])

  462.         assertEqualIter(lst[:-3], [])

  463.         assertEqualIter(lst[:-4], [])  # bug in list

  464.         assertEqualIter(lst[1:-1], [1])

  465.         assertEqualIter(lst[1:-2], [])

  466.         assertEqualIter(lst[1:-3], [])

  467.         assertEqualIter(lst[1:-4], [])  # bug in list

  468.         assertEqualIter(lst[-1:-1], [])

  469.         assertEqualIter(lst[-2:-1], [1])

  470.         assertEqualIter(lst[-3:-1], [0, 1])

  471.         assertEqualIter(lst[-4:-1], [0, 1])  # bug in list and iteration

  472.         assertEqualIter(lst[-3:-1], [0, 1])

  473.         assertEqualIter(lst[-3:-2], [0])

  474.         assertEqualIter(lst[-3:-3], [])

  475.         assertEqualIter(lst[-3:-4], [])  # bug in list

  476. 

  477.         # step == 2

  478.         assertEqualIter(lst[::2], [0, 2])

  479.         assertEqualIter(lst[0::2], [0, 2])

  480.         assertEqualIter(lst[1::2], [1])

  481.         assertEqualIter(lst[2::2], [2])

  482.         assertEqualIter(lst[3::2], [])

  483.         assertEqualIter(lst[4::2], [])

  484. 

  485.         # step < 0 -- all of these are not working correctly

  486.         assertEqualIter(lst[::-1], [2, 1, 0])

  487.         assertEqualIter(lst[0::-1], [0])

  488.         assertEqualIter(lst[1::-1], [1, 0])

  489.         assertEqualIter(lst[2::-1], [2, 1, 0])

  490.         assertEqualIter(lst[3::-1], [2, 1, 0])

  491.         assertEqualIter(lst[4::-1], [2, 1, 0])

  492.         assertEqualIter(lst[::-2], [2, 0])

  493.         assertEqualIter(lst[0::-2], [0])

  494.         assertEqualIter(lst[1::-2], [1])

  495.         assertEqualIter(lst[2::-2], [2, 0])

  496.         assertEqualIter(lst[3::-2], [2, 0])

  497.         assertEqualIter(lst[4::-2], [2, 0])

  498. 

  499.     def test_get_slice(self):

  500.         self._test_get_slice(list, self.assertEqual)  # test against built-in list

  501.         self._test_get_slice(SmartList, self.assertEqual)

  502. 

  503.     def test_get_slice_iterator(self):

  504.         self._test_get_slice(list, self.assertEqualIterator)  # test against built-in list

  505.         self._test_get_slice(SmartList, self.assertEqualIterator)

  506. 

  507.     def assertEqualIterator(self, iter1, iter2):

  508.         if py3k:

  509.             from itertools import zip_longest

  510.         else:

  511.             from itertools import izip_longest as zip_longest

  512. 

  513.         for a, b in zip_longest(iter1, iter2, fillvalue='__END_OF_LIST__'):

  514.             self.assertEqual(a, b)

  515. 

  516. 

  517. if __name__ == "__main__":

  518.     unittest.main(verbosity=2)