def test_calculate_exchange_rate_by_inference(self):
# Arrange
converter = ExchangeRateCalculator()
bid_rates = {
"USD/JPY": Decimal("110.100"),
"AUD/USD": Decimal("0.80000"),
}
ask_rates = {
"USD/JPY": Decimal("110.130"),
"AUD/USD": Decimal("0.80010"),
}
# Act
result1 = converter.get_rate(
JPY,
AUD,
PriceType.BID,
bid_rates,
ask_rates,
)
result2 = converter.get_rate(
AUD,
JPY,
PriceType.ASK,
bid_rates,
ask_rates,
)
# Assert
self.assertAlmostEqual(Decimal("0.01135331516802906448683015441"),
result1) # JPYAUD
self.assertAlmostEqual(Decimal("88.11501299999999999999999997"),
result2) # AUDJPY
def test_calculate_exchange_rate_by_inference(self):
# Arrange
converter = ExchangeRateCalculator()
bid_rates = {"USDJPY": 110.100, "AUDUSD": 0.80000}
ask_rates = {"USDJPY": 110.130, "AUDUSD": 0.80010}
# Act
result1 = converter.get_rate(JPY, AUD, PriceType.BID, bid_rates,
ask_rates)
result2 = converter.get_rate(AUD, JPY, PriceType.ASK, bid_rates,
ask_rates)
# Assert
self.assertEqual(0.011353315168029064, result1) # JPYAUD
self.assertEqual(88.11501299999999, result2) # AUDJPY
def test_calculate_exchange_rate_for_mid_price_type2(self):
# Arrange
converter = ExchangeRateCalculator()
bid_rates = {"USDJPY": 110.100}
ask_rates = {"USDJPY": 110.130}
# Act
result = converter.get_rate(USD, JPY, PriceType.MID, bid_rates,
ask_rates)
# Assert
self.assertEqual(110.115, result)
def test_get_rate(self):
# Arrange
converter = ExchangeRateCalculator()
bid_rates = {"AUD/USD": Decimal("0.80000")}
ask_rates = {"AUD/USD": Decimal("0.80010")}
# Act
result = converter.get_rate(
AUD,
USD,
PriceType.BID,
bid_rates,
ask_rates,
)
# Assert
self.assertEqual(Decimal("0.80000"), result)
def test_get_rate_when_no_currency_rate_returns_zero(self):
# Arrange
converter = ExchangeRateCalculator()
bid_rates = {"AUD/USD": Decimal("0.80000")}
ask_rates = {"AUD/USD": Decimal("0.80010")}
# Act
result = converter.get_rate(
USD,
JPY,
PriceType.BID,
bid_rates,
ask_rates,
)
# Assert
self.assertEqual(0, result)
def test_calculate_exchange_rate_for_mid_price_type(self):
# Arrange
converter = ExchangeRateCalculator()
bid_rates = {"USD/JPY": Decimal("110.100")}
ask_rates = {"USD/JPY": Decimal("110.130")}
# Act
result = converter.get_rate(
JPY,
USD,
PriceType.MID,
bid_rates,
ask_rates,
)
# Assert
self.assertEqual(Decimal("0.009081414884438995595513781047"), result)
def test_get_rate_for_inverse2(self):
# Arrange
converter = ExchangeRateCalculator()
bid_rates = {"USD/JPY": Decimal("110.100")}
ask_rates = {"USD/JPY": Decimal("110.130")}
# Act
result = converter.get_rate(
JPY,
USD,
PriceType.BID,
bid_rates,
ask_rates,
)
# Assert
self.assertAlmostEqual(Decimal("0.009082652"), result)
def test_get_rate_for_inverse1(self):
# Arrange
converter = ExchangeRateCalculator()
bid_rates = {"BTC/USD": Decimal("10501.5")}
ask_rates = {"BTC/USD": Decimal("10500.0")}
# Act
result = converter.get_rate(
USD,
BTC,
PriceType.BID,
bid_rates,
ask_rates,
)
# Assert
self.assertEqual(Decimal("0.00009522449173927534161786411465"), result)
def test_calculate_exchange_rate_for_inverse(self):
# Arrange
converter = ExchangeRateCalculator()
bid_rates = {"USDJPY": 110.100}
ask_rates = {"USDJPY": 110.130}
# Act
result = converter.get_rate(
JPY,
USD,
PriceType.BID,
bid_rates,
ask_rates,
)
# Assert
self.assertEqual(0.009082652134423252, result)