public async Task <IActionResult> Calcular(
[FromServices] CalculadoraJurosHandler handler,
[SwaggerParameter(Required = true)][FromQuery] CalculoCommand command)
{
var result = await handler.Calcular(command);
return(Ok(result));
}
public void Calcular_QuandoValorForZeroOuNegativo_DeveLancarException(double valorInicial, int meses)
{
//Arrange
var command = new CalculoCommand
{
ValorInicial = valorInicial,
Meses = meses
};
//Act // Assert
handler
.Invoking(x => x.Calcular(command))
.Should()
.ThrowExactly <ArgumentOutOfRangeException>()
.WithMessage($"{ValidationErrors.MaiorOuIgualZero}*");
}
public async void Calcular_QuandoValoresEstiveremValidos_DeveRetornarValorCalculado(int valorInicial, int meses, double taxaJuros, double valorEsperado)
{
//Arrange
jurosClient.Setup(x => x.GetJuros()).Returns(Task.FromResult(taxaJuros));
var command = new CalculoCommand
{
ValorInicial = valorInicial,
Meses = meses
};
//Act
var result = await handler.Calcular(command);
//Assert
result.Should().Be(valorEsperado);
}
public async Task <double> Calcular(CalculoCommand command)
{
if (command == null)
{
throw new ArgumentNullException(nameof(command));
}
if (command.ValorInicial <= 0)
{
throw new ArgumentOutOfRangeException("valorInicial", ValidationErrors.MaiorOuIgualZero);
}
if (command.Meses <= 0)
{
throw new ArgumentOutOfRangeException("meses", ValidationErrors.MaiorOuIgualZero);
}
logger.LogInformation("Obtendo júros da API 1");
var juros = await jurosClient.GetJuros();
logger.LogInformation("Júros carregado com uma taxa de {0}", juros);
var valor = command.ValorInicial * Math.Pow(1 + juros, command.Meses);
return((double)decimal.Round((decimal)valor, 2));
}
