async def get_trades(db: Session = Depends(get_db)):
"""Returns a list of all trades, sorted in descending order by timetamps.
"""
trade_rows = db.query(Trade).order_by(Trade.timestamp.desc())
return TradesResponse(trades=[
TradeModel(
id=r.trade_id,
sell_ccy=r.sell_ccy,
sell_amount=Currency(r.sell_amount),
buy_ccy=r.buy_ccy,
buy_amount=Currency(r.sell_amount) * r.rate,
rate=r.rate,
timestamp=r.timestamp,
) for r in trade_rows
])
def test_json_roundtrip(i: int) -> None:
class Model(BaseModel):
c: Currency
model = Model(c=Currency(i))
serialized = json.loads(model.json())
assert model == Model(**serialized)
def test_multiplication_commutative(n: int, s: float) -> None:
assert Currency(n) * s == s * Currency(n)
def test_str(i: int, frac: int) -> None:
assert str(Currency(100 * i + frac)) == f"{i}.{frac:02d}"
def test_multiplication_floats(n: int, s: float) -> None:
assert Currency(n) * s == Currency(floor(n * s))
def test_multiplication_integers(n: int, m: int) -> None:
assert Currency(n) * m == Currency(n * m)
def test_validation_ok(i: int) -> None:
class Model(BaseModel):
c: Currency
assert Model(c=i).c == Currency(i)
assert Model(c=Currency(i)).c == Currency(i)
def test_init_negative(i: int) -> None:
with pytest.raises(ValueError):
Currency(i)
def test_init_ok(i: int) -> None:
assert i == Currency(i).value