def test_init():
"""Test __init__."""
b = Bag('abracadabra')
assert b.count('a') == 5
assert b.count('b') == 2
assert b.count('r') == 2
assert b.count('c') == 1
assert b.count('d') == 1
b2 = bag(b)
assert b2 == b
def test_count():
"""Test count."""
ms = Bag('abracadabra')
assert ms.count('a') == 5
assert ms.count('x') == 0