test_sets.py

mallet是自然语言处理、机器学习领域的一个开源项目。

#!/usr/bin/env python

from __future__ import generators

import unittest, operator, copy, pickle
from sets import Set, ImmutableSet
from test import test_support

empty_set = Set()

#==============================================================================

class TestBasicOps(unittest.TestCase):

    def test_repr(self):
        if self.repr is not None:
            self.assertEqual(`self.set`, self.repr)

    def test_length(self):
        self.assertEqual(len(self.set), self.length)

    def test_self_equality(self):
        self.assertEqual(self.set, self.set)

    def test_equivalent_equality(self):
        self.assertEqual(self.set, self.dup)

    def test_copy(self):
        self.assertEqual(self.set.copy(), self.dup)

    def test_self_union(self):
        result = self.set | self.set
        self.assertEqual(result, self.dup)

    def test_empty_union(self):
        result = self.set | empty_set
        self.assertEqual(result, self.dup)

    def test_union_empty(self):
        result = empty_set | self.set
        self.assertEqual(result, self.dup)

    def test_self_intersection(self):
        result = self.set & self.set
        self.assertEqual(result, self.dup)

    def test_empty_intersection(self):
        result = self.set & empty_set
        self.assertEqual(result, empty_set)

    def test_intersection_empty(self):
        result = empty_set & self.set
        self.assertEqual(result, empty_set)

    def test_self_symmetric_difference(self):
        result = self.set ^ self.set
        self.assertEqual(result, empty_set)

    def checkempty_symmetric_difference(self):
        result = self.set ^ empty_set
        self.assertEqual(result, self.set)

    def test_self_difference(self):
        result = self.set - self.set
        self.assertEqual(result, empty_set)

    def test_empty_difference(self):
        result = self.set - empty_set
        self.assertEqual(result, self.dup)

    def test_empty_difference_rev(self):
        result = empty_set - self.set
        self.assertEqual(result, empty_set)

    def test_iteration(self):
        for v in self.set:
            self.assert_(v in self.values)

    def _test_pickling(self):
        p = pickle.dumps(self.set)
        copy = pickle.loads(p)
        self.assertEqual(self.set, copy,
                         "%s != %s" % (self.set, copy))

#------------------------------------------------------------------------------

class TestBasicOpsEmpty(TestBasicOps):
    def setUp(self):
        self.case   = "empty set"
        self.values = []
        self.set    = Set(self.values)
        self.dup    = Set(self.values)
        self.length = 0
        self.repr   = "Set([])"

#------------------------------------------------------------------------------

class TestBasicOpsSingleton(TestBasicOps):
    def setUp(self):
        self.case   = "unit set (number)"
        self.values = [3]
        self.set    = Set(self.values)
        self.dup    = Set(self.values)
        self.length = 1
        self.repr   = "Set([3])"

    def test_in(self):
        self.failUnless(3 in self.set)

    def test_not_in(self):
        self.failUnless(2 not in self.set)

#------------------------------------------------------------------------------

class TestBasicOpsTuple(TestBasicOps):
    def setUp(self):
        self.case   = "unit set (tuple)"
        self.values = [(0, "zero")]
        self.set    = Set(self.values)
        self.dup    = Set(self.values)
        self.length = 1
        self.repr   = "Set([(0, 'zero')])"

    def test_in(self):
        self.failUnless((0, "zero") in self.set)

    def test_not_in(self):
        self.failUnless(9 not in self.set)

#------------------------------------------------------------------------------

class TestBasicOpsTriple(TestBasicOps):
    def setUp(self):
        self.case   = "triple set"
        self.values = [0, "zero", operator.add]
        self.set    = Set(self.values)
        self.dup    = Set(self.values)
        self.length = 3
        self.repr   = None

#==============================================================================

def baditer():
    raise TypeError
    yield True

def gooditer():
    yield True

class TestExceptionPropagation(unittest.TestCase):
    """SF 628246:  Set constructor should not trap iterator TypeErrors"""

    def test_instanceWithException(self):
        self.assertRaises(TypeError, Set, baditer())

    def test_instancesWithoutException(self):
        # All of these iterables should load without exception.
        Set([1,2,3])
        Set((1,2,3))
        Set({'one':1, 'two':2, 'three':3})
        Set(xrange(3))
        Set('abc')
        Set(gooditer())

#==============================================================================

class TestSetOfSets(unittest.TestCase):
    def test_constructor(self):
        inner = Set([1])
        outer = Set([inner])
        element = outer.pop()
        self.assertEqual(type(element), ImmutableSet)
        outer.add(inner)        # Rebuild set of sets with .add method
        outer.remove(inner)
        self.assertEqual(outer, Set())   # Verify that remove worked
        outer.discard(inner)    # Absence of KeyError indicates working fine

#==============================================================================

class TestBinaryOps(unittest.TestCase):
    def setUp(self):
        self.set = Set((2, 4, 6))

    def test_eq(self):              # SF bug 643115
        self.assertEqual(self.set, Set({2:1,4:3,6:5}))

    def test_union_subset(self):
        result = self.set | Set([2])
        self.assertEqual(result, Set((2, 4, 6)))

    def test_union_superset(self):
        result = self.set | Set([2, 4, 6, 8])
        self.assertEqual(result, Set([2, 4, 6, 8]))

    def test_union_overlap(self):
        result = self.set | Set([3, 4, 5])
        self.assertEqual(result, Set([2, 3, 4, 5, 6]))

    def test_union_non_overlap(self):
        result = self.set | Set([8])
        self.assertEqual(result, Set([2, 4, 6, 8]))

    def test_intersection_subset(self):
        result = self.set & Set((2, 4))
        self.assertEqual(result, Set((2, 4)))

    def test_intersection_superset(self):
        result = self.set & Set([2, 4, 6, 8])
        self.assertEqual(result, Set([2, 4, 6]))

    def test_intersection_overlap(self):
        result = self.set & Set([3, 4, 5])
        self.assertEqual(result, Set([4]))

    def test_intersection_non_overlap(self):
        result = self.set & Set([8])
        self.assertEqual(result, empty_set)

    def test_sym_difference_subset(self):
        result = self.set ^ Set((2, 4))
        self.assertEqual(result, Set([6]))

    def test_sym_difference_superset(self):
        result = self.set ^ Set((2, 4, 6, 8))
        self.assertEqual(result, Set([8]))

    def test_sym_difference_overlap(self):
        result = self.set ^ Set((3, 4, 5))
        self.assertEqual(result, Set([2, 3, 5, 6]))

    def test_sym_difference_non_overlap(self):
        result = self.set ^ Set([8])
        self.assertEqual(result, Set([2, 4, 6, 8]))

    def _test_cmp(self):
        a, b = Set('a'), Set('b')
        self.assertRaises(TypeError, cmp, a, b)

        # You can view this as a buglet:  cmp(a, a) does not raise TypeError,
        # because __eq__ is tried before __cmp__, and a.__eq__(a) returns True,
        # which Python thinks is good enough to synthesize a cmp() result
        # without calling __cmp__.
        self.assertEqual(cmp(a, a), 0)

        self.assertRaises(TypeError, cmp, a, 12)
        self.assertRaises(TypeError, cmp, "abc", a)

#==============================================================================

class TestUpdateOps(unittest.TestCase):
    def setUp(self):
        self.set = Set((2, 4, 6))

    def test_union_subset(self):
        self.set |= Set([2])
        self.assertEqual(self.set, Set((2, 4, 6)))

    def test_union_superset(self):
        self.set |= Set([2, 4, 6, 8])
        self.assertEqual(self.set, Set([2, 4, 6, 8]))

    def test_union_overlap(self):
        self.set |= Set([3, 4, 5])
        self.assertEqual(self.set, Set([2, 3, 4, 5, 6]))

    def test_union_non_overlap(self):
        self.set |= Set([8])
        self.assertEqual(self.set, Set([2, 4, 6, 8]))

    def test_union_method_call(self):
        self.set.union_update(Set([3, 4, 5]))
        self.assertEqual(self.set, Set([2, 3, 4, 5, 6]))

    def test_intersection_subset(self):
        self.set &= Set((2, 4))
        self.assertEqual(self.set, Set((2, 4)))

    def test_intersection_superset(self):
        self.set &= Set([2, 4, 6, 8])
        self.assertEqual(self.set, Set([2, 4, 6]))

    def test_intersection_overlap(self):
        self.set &= Set([3, 4, 5])
        self.assertEqual(self.set, Set([4]))

    def test_intersection_non_overlap(self):
        self.set &= Set([8])
        self.assertEqual(self.set, empty_set)

    def test_intersection_method_call(self):
        self.set.intersection_update(Set([3, 4, 5]))
        self.assertEqual(self.set, Set([4]))

    def test_sym_difference_subset(self):
        self.set ^= Set((2, 4))
        self.assertEqual(self.set, Set([6]))

    def test_sym_difference_superset(self):
        self.set ^= Set((2, 4, 6, 8))
        self.assertEqual(self.set, Set([8]))

    def test_sym_difference_overlap(self):
        self.set ^= Set((3, 4, 5))
        self.assertEqual(self.set, Set([2, 3, 5, 6]))

    def test_sym_difference_non_overlap(self):
        self.set ^= Set([8])
        self.assertEqual(self.set, Set([2, 4, 6, 8]))

    def test_sym_difference_method_call(self):
        self.set.symmetric_difference_update(Set([3, 4, 5]))
        self.assertEqual(self.set, Set([2, 3, 5, 6]))

    def test_difference_subset(self):
        self.set -= Set((2, 4))
        self.assertEqual(self.set, Set([6]))

    def test_difference_superset(self):
        self.set -= Set((2, 4, 6, 8))
        self.assertEqual(self.set, Set([]))

    def test_difference_overlap(self):
        self.set -= Set((3, 4, 5))
        self.assertEqual(self.set, Set([2, 6]))

    def test_difference_non_overlap(self):
        self.set -= Set([8])
        self.assertEqual(self.set, Set([2, 4, 6]))

    def test_difference_method_call(self):
        self.set.difference_update(Set([3, 4, 5]))
        self.assertEqual(self.set, Set([2, 6]))

#==============================================================================

class TestMutate(unittest.TestCase):
    def setUp(self):
        self.values = ["a", "b", "c"]
        self.set = Set(self.values)

    def test_add_present(self):
        self.set.add("c")
        self.assertEqual(self.set, Set("abc"))

    def test_add_absent(self):
        self.set.add("d")
        self.assertEqual(self.set, Set("abcd"))

    def test_add_until_full(self):
        tmp = Set()
        expected_len = 0
        for v in self.values:
            tmp.add(v)
            expected_len += 1
            self.assertEqual(len(tmp), expected_len)
        self.assertEqual(tmp, self.set)

    def test_remove_present(self):
        self.set.remove("b")
        self.assertEqual(self.set, Set("ac"))

    def test_remove_absent(self):
        try:
            self.set.remove("d")
            self.fail("Removing missing element should have raised LookupError")
        except LookupError:
            pass

    def test_remove_until_empty(self):
        expected_len = len(self.set)
        for v in self.values:
            self.set.remove(v)
            expected_len -= 1
            self.assertEqual(len(self.set), expected_len)

    def test_discard_present(self):
        self.set.discard("c")
        self.assertEqual(self.set, Set("ab"))

    def test_discard_absent(self):
        self.set.discard("d")
        self.assertEqual(self.set, Set("abc"))

    def test_clear(self):
        self.set.clear()
        self.assertEqual(len(self.set), 0)

    def test_pop(self):
        popped = {}
        while self.set:
            popped[self.set.pop()] = None
        self.assertEqual(len(popped), len(self.values))
        for v in self.values:
            self.failUnless(v in popped)

    def test_update_empty_tuple(self):
        self.set.union_update(())