def test_money_json_magic_none():
usd = Money("0.1", None)
usd_dict = usd.__json__()
dump = simplejson.dumps(usd_dict)
dict_ = simplejson.loads(dump)
undump = Money.from_json(dict_)
assert usd == undump
def test_gt_other_currency_fail():
a = Money("12.45", "USD")
b = Money("67.89", "EUR")
with pytest.raises(ValueError) as exinfo:
a > b
error_msg = ("Left has currency=US Dollar, right has currency=Euro. "
"You need to convert to the same currency first.")
assert str(exinfo.value) == error_msg
def test_formatting():
non_currency = Money("12.2", None)
assert f"{non_currency}" == "12.20"
assert f"{non_currency:0.2f,symbol}" == "12.20"
assert f"{non_currency:0.2f,postsymbol}" == "12.20"
assert f"{non_currency:0.2f,shortcode}" == "12.20"
assert f"{non_currency:0.2f,postshortcode}" == "12.20"
a = Money("12.20", "USD")
assert f"{a}" == "12.20 USD"
assert f"{a:0.2f,symbol}" == "$12.20"
assert f"{a:0.2f,postsymbol}" == "12.20$"
assert f"{a:0.2f,shortcode}" == "USD 12.20"
assert f"{a:0.2f,postshortcode}" == "12.20 USD"
def test_currency_operations():
a = Money("0.5", "EUR")
aneg = Money("-0.5", "EUR")
b = Money("0.1", "EUR")
c = Money("0.1", "USD")
d = Money("0.5", "EUR")
assert (a == b) is False
with pytest.raises(ValueError):
a == 0.5
assert a == d
with pytest.raises(ValueError):
a == c
assert a != b
assert (a != d) is False
with pytest.raises(ValueError):
a != c
assert str(a - b) == "0.40 Euro"
assert -a == aneg
assert +a == a
with pytest.raises(ValueError):
a - c
with pytest.raises(ValueError):
a - 2
with pytest.raises(ValueError):
a - 2.0
assert str(a + b) == "0.60 Euro"
with pytest.raises(ValueError):
a + c
with pytest.raises(ValueError):
a + 2
with pytest.raises(ValueError):
a + 2.0
assert str(2 * a) == "1.00 Euro"
assert str(a / b) == "5"
with pytest.raises(ValueError):
a / c
with pytest.raises(ValueError):
a * 3.141
with pytest.raises(ValueError):
3.141 * a
with pytest.raises(ValueError):
a / "0.1"
assert str(a / 2) == "0.25 Euro"
def test_currency_comperators():
a = Money("0.5", "EUR")
b = Money("0.1", "EUR")
c = Money("0.5", "EUR")
d = Money("0.5", "USD")
assert a > b
assert (a < b) is False
assert a >= b
assert (a <= b) is False
assert (a > c) is False
assert (a < c) is False
assert a >= c
assert a <= c
with pytest.raises(ValueError):
is_smaller = c < d
with pytest.raises(ValueError):
is_smaller = c < d
with pytest.raises(ValueError):
is_equal = c == d
assert (c < 1) is False
assert (c > 1) is False
def test_get_currency():
a = Money("0.1", "EUR")
assert str(a) == "0.10 Euro"
b = Money("0.1", "USD")
assert str(b) == "0.10 US Dollar"
with pytest.raises(ValueError):
Money("0.1", "foobar")
c = Money((1, 100), "EUR")
d = Money(5, "ESP")
assert str(c) == "0.01 Euro"
assert repr(c) == "0.01 Euro"
assert str(d) == "5.00 Spanish Peseta"
with pytest.raises(ValueError):
Money((5, 100, 42), "EUR")
with pytest.raises(ValueError):
Money(0.1, "EUR")
non_currency = Money("0.1", None)
assert str(non_currency) == "0.10"
with pytest.raises(ValueError):
Money(1, a)
def test_money_floatingpoint_issue2():
"""The test is the reason why one should not use float for money."""
a = Money("10.00", None)
b = Money("1.2", None)
assert str((a + b - a) * 10**14 - b * 10**14) == "0.00"
def test_money_floatingpoint_issue1():
"""The test is the reason why one should not use float for money."""
a = Money("10.00", None)
b = Money("1.2", None)
assert str(a + b - a) == str(b)
def test_money_conversion_float():
"""Test if one can convert Money instances to float."""
a = Money("1337.00", None)
assert float(a) == 1337.0
b = Money("42.00", "USD")
assert float(b) == 42.0
def test_eq_exception_msg():
a = Money("0.1", "EUR")
with pytest.raises(ValueError) as excinfo:
a == 0.5
assert "XX" not in str(excinfo)