public async Task GetFeePercentage_Should_Throw_Exception_When_HttpHandler_Fails()
{
var httpHandlerMock = new Mock <IHttpHandler>();
httpHandlerMock
.Setup(h => h.GetAsyncAsString(It.IsAny <string>()))
.Throws(new Exception());
var feePercentageService = new FeePercentageService(httpHandlerMock.Object, "");
await Assert.ThrowsAsync <FeePercentageServiceException>(async() =>
{
var actual = await feePercentageService.GetFeePercentage();
});
}
public async Task GetFeePercentage_Should_Return_Valid_Value()
{
var expected = 0.01m;
var httpHandlerMock = new Mock <IHttpHandler>();
httpHandlerMock
.Setup(h => h.GetAsyncAsString(It.IsAny <string>()))
.ReturnsAsync("0.01");
var feePercentageService = new FeePercentageService(httpHandlerMock.Object, "");
var actual = await feePercentageService.GetFeePercentage();
Assert.Equal(expected, actual);
}
public async Task Execute_Should_Return_Valid_Value(decimal initialValue, int months, decimal expected)
{
var hostIp = Environment.GetEnvironmentVariable(EnvironmentVariables.HostIp);
var httpClient = new HttpClient();
var httpHandler = new HttpClientHandler(httpClient);
var feePercentageService = new FeePercentageService(
httpHandler,
String.Format(FeePercentageService.UrlEndpointFormat, hostIp)
);
var calculateCompositeFeeUsecase = new CalculateCompositeFeeUsecase(feePercentageService);
var actual = await calculateCompositeFeeUsecase.Execute(initialValue, months);
Assert.Equal(expected, actual);
}
public async Task Execute_Should_Return_Zero_When_Months_Value_Is_Negative()
{
var hostIp = Environment.GetEnvironmentVariable(EnvironmentVariables.HostIp);
var httpClient = new HttpClient();
var httpHandler = new HttpClientHandler(httpClient);
var feePercentageService = new FeePercentageService(
httpHandler,
String.Format(FeePercentageService.UrlEndpointFormat, hostIp)
);
var calculateCompositeFeeUsecase = new CalculateCompositeFeeUsecase(feePercentageService);
var initialValue = 1;
var months = -Int32.MaxValue;
var expected = 0;
var actual = await calculateCompositeFeeUsecase.Execute(initialValue, months);
Assert.Equal(expected, actual);
}
public async Task Execute_Should_Throw_Exception_When_InitialValue_Is_Too_Small()
{
var hostIp = Environment.GetEnvironmentVariable(EnvironmentVariables.HostIp);
var httpClient = new HttpClient();
var httpHandler = new HttpClientHandler(httpClient);
var feePercentageService = new FeePercentageService(
httpHandler,
String.Format(FeePercentageService.UrlEndpointFormat, hostIp)
);
var calculateCompositeFeeUsecase = new CalculateCompositeFeeUsecase(feePercentageService);
var initialValue = -Decimal.MaxValue;
var months = 1;
await Assert.ThrowsAsync <CalculateCompositeFeeUsecaseException>(async() =>
{
await calculateCompositeFeeUsecase.Execute(initialValue, months);
});
}
