public void Multiplier_equal_0_then_throw_exception()
{
//Given
IExchangeService service = new ExchangeService();
//When
ArgumentNullException exception =
Assert.Throws <ArgumentNullException>(() =>
service.Times(FakeDataBuilder.MakeDollar(5), 0));
//Then
Assert.Contains("Multiplier can not be 0", exception.Message);
}
public void If_Create_Money_Then_Get_Currency_It_Should_Be_Return_Currency()
{
//Given
var fiveBucks = FakeDataBuilder.MakeDollar(5);
var fiveFranc = FakeDataBuilder.MakeFranc(5);
//When
//Then
Assert.Equal("USD", fiveBucks.GetCurrency());
Assert.Equal("CHF", fiveFranc.GetCurrency());
}
public void Exchange_currency_then_return_assign_currency_and_correct_amount()
{
//Given
IExchangeService exchange = new ExchangeService();
var tenFranc = FakeDataBuilder.MakeFranc(10);
exchange.AddRate("CHF", "USD", 2);
//When
ICurrencyExpression result = exchange.Exchange(tenFranc, "USD");
//Then
Assert.Equal(FakeDataBuilder.MakeDollar(5), result);
}
public void Not_setting_Rate_Then_Exchange_then_throw_exception()
{
//Given
IExchangeService exchange = new ExchangeService();
var tenFranc = FakeDataBuilder.MakeFranc(10);
//When
ArgumentNullException exception =
Assert.Throws <ArgumentNullException>(() =>
exchange.Exchange(tenFranc, "USD"));
//Then
Assert.Contains("Before Exchange must be setting Exchange rates", exception.Message);
}
public void If_Same_Amount_Currency_Then_Compare_Equal_It_Should_Be_Return_True()
{
//Given
var fiveBucks = FakeDataBuilder.MakeDollar(5);
var fiveFranc = FakeDataBuilder.MakeFranc(5);
//When
//Then
Assert.True(fiveBucks.Equals(FakeDataBuilder.MakeDollar(5)));
Assert.False(fiveBucks.Equals(FakeDataBuilder.MakeDollar(6)));
Assert.True(fiveFranc.Equals(FakeDataBuilder.MakeFranc(5)));
Assert.False(fiveFranc.Equals(FakeDataBuilder.MakeFranc(6)));
Assert.False(fiveFranc.Equals(FakeDataBuilder.MakeDollar(5)));
}
public void Currency_Times_N_then_return_amount_multiplied_by_N()
{
//Given
IExchangeService exchange = new ExchangeService();
int fakeAmount = 5;
ICurrencyExpression fiveBucks = FakeDataBuilder.MakeDollar(fakeAmount);
ICurrencyExpression fiveFranc = FakeDataBuilder.MakeFranc(fakeAmount);
//When
var result = exchange.Times(fiveBucks, 8);
//Then
Assert.True(FakeDataBuilder.MakeDollar(10).Equals(exchange.Times(fiveBucks, 2)));
Assert.True(FakeDataBuilder.MakeDollar(15).Equals(exchange.Times(fiveBucks, 3)));
Assert.True(FakeDataBuilder.MakeFranc(10).Equals(exchange.Times(fiveFranc, 2)));
Assert.True(FakeDataBuilder.MakeFranc(15).Equals(exchange.Times(fiveFranc, 3)));
}
public void Invalid_params_to_Exchange_then_throw_exception()
{
//Given
IExchangeService exchange = new ExchangeService();
//When
ArgumentNullException exception =
Assert.Throws <ArgumentNullException>(() =>
exchange.Exchange(FakeDataBuilder.MakeDollar(1), null));
//Then
Assert.Contains("Exchange must assign Currency", exception.Message);
ArgumentNullException sourceException = Assert
.Throws <ArgumentNullException>(() => exchange.Exchange(null, "USD"));
Assert.Contains("Exchange must be have Money", sourceException.Message);
}
public void Sum_Params_contains_diff_money_and_param_To_is_null_then_throw_exception()
{
//Given
IExchangeService exchange = new ExchangeService();
var Bucks = FakeDataBuilder.MakeDollar(1);
var Franc = FakeDataBuilder.MakeFranc(10);
//When
ArgumentNullException exception =
Assert.Throws <ArgumentNullException>(() =>
exchange.Sum(
null,
new ICurrencyExpression[] { Bucks, Franc }
));
//Then
Assert.Contains("addeds contains diff currency,mush be assign currency", exception.Message);
}
public void Sum_and_Times_N_and_ExchangeTo_then_return_correct_total()
{
//Given
IExchangeService service = new ExchangeService();
var tenBucks = FakeDataBuilder.MakeDollar(10);
var fiveBucks = FakeDataBuilder.MakeDollar(5);
service.AddRate("CHF", "USD", 2);
//When
ICurrencyExpression result = service
.Sum(new Money[] { tenBucks, fiveBucks })
.Times(2)
.ExchangeTo("USD");
//Then
Assert.Equal(FakeDataBuilder.MakeDollar(30), result);
}
public void After_ExchangeTo_currency_then_clean_ExpressionList()
{
//Given
IExchangeService exchange = new ExchangeService();
var fiveBucks = FakeDataBuilder.MakeDollar(5);
var tenFranc = FakeDataBuilder.MakeFranc(10);
exchange.AddRate("CHF", "USD", 2);
//When
ICurrencyExpression sameParamSum = exchange
.Sum(new Money[] { fiveBucks, fiveBucks })
.ExchangeTo("USD");
int counts = exchange.ExpressionsList.Count();
//Then
Assert.Equal(0, counts);
}
public void ExchangeTo_then_return_correct_currency()
{
//Given
ExchangeService service = new ExchangeService();
service.AddRate("CHF", "USD", 2);
//When
ICurrencyExpression result = service
.Sum(
new ICurrencyExpression[]
{
FakeDataBuilder.MakeDollar(5),
FakeDataBuilder.MakeFranc(10)
}).ExchangeTo("USD");
//Then
Assert.Equal(FakeDataBuilder.MakeDollar(10), result);
}