def test_add_zero(self):
pairs = ((self.first, 1), (self.second, -1))
source = Multiset(pairs)
added = source.add(self.second)
self.assertEqual({self.first: 1}, added.store)
def test_add_compound(self):
a = Multiset(((self.first, 1), (self.second, -1)))
b = Multiset(((self.first, -1), (self.second, -1)))
added = a.add(b)
self.assertEqual({self.second: -2}, added.store)
def test_equality(self):
pairs = ((self.first, 1), (self.second, -1))
a = Multiset(pairs)
b = Multiset(pairs)
self.assertEqual(a, b)
def test_creation_copy(self):
pairs = ((self.first, 1), (self.second, -1))
source = Multiset(pairs)
dest = Multiset(source)
self.assertEqual(source, dest)
def test_remove_compound(self):
a = Multiset(((self.first, 1), (self.second, -1)))
b = Multiset(((self.first, -1), (self.second, -1)))
subtracted = a.remove(b)
self.assertEqual({self.first: 2}, subtracted.store)
def test_remove_zero(self):
pairs = ((self.first, 1), (self.second, -1))
source = Multiset(pairs)
subtracted = source.remove(self.first)
self.assertEqual({self.second: -1}, subtracted.store)
def test_creation_pairs(self):
pairs = ((self.first, 1), (self.second, -1))
multiset = Multiset(pairs)
self.assertEqual({self.first: 1, self.second: -1}, multiset.store)