def test_simple(self):
"Simple wallet tests."
w = Wallet()
assert len(w) == 0
# Test constructing with keywords.
w = Wallet(CAD='5.688')
assert len(w) == 1
assert w['CAD'] == Decimal('5.688')
# Test special shortcut constructor.
w = Wallet('CAD', '5.688')
assert len(w) == 1
assert w['CAD'] == Decimal('5.688')
# Test special shortcut constructor.
w = Wallet('1 CAD, 2 USD')
assert len(w) == 2
assert w['CAD'] == Decimal('1')
assert w['USD'] == Decimal('2')
# Test copy constructor.
w2 = Wallet(w)
assert w is not w2
assert w == w2
# Test copy method.
ww = w.copy()
assert isinstance(ww, Wallet), ww
