public async Task InvalidPostcode()
{
_postcodeValidator.Setup(x => x.IsPostcodeValidAsync(It.IsAny <string>())).ReturnsAsync(false);
GetPostcodeRequest req = new GetPostcodeRequest()
{
Postcode = "NG1 5FS"
};
GetPostcode getPostcode = new GetPostcode(_mediator.Object, _postcodeValidator.Object, _logger.Object);
IActionResult result = await getPostcode.Run(req, CancellationToken.None);
ObjectResult objectResult = result as ObjectResult;
Assert.IsNotNull(objectResult);
Assert.AreEqual(422, objectResult.StatusCode);
ResponseWrapper <GetPostcodeResponse, AddressServiceErrorCode> deserialisedResponse = objectResult.Value as ResponseWrapper <GetPostcodeResponse, AddressServiceErrorCode>;
Assert.IsNotNull(deserialisedResponse);
Assert.IsFalse(deserialisedResponse.HasContent);
Assert.IsFalse(deserialisedResponse.IsSuccessful);
Assert.AreEqual(1, deserialisedResponse.Errors.Count());
Assert.AreEqual(AddressServiceErrorCode.InvalidPostcode, deserialisedResponse.Errors[0].ErrorCode);
_mediator.Verify(x => x.Send(It.IsAny <GetPostcodeRequest>(), It.IsAny <CancellationToken>()), Times.Never);
}
public async Task HappyPath()
{
GetPostcodeRequest req = new GetPostcodeRequest()
{
Postcode = "NG1 5FS"
};
GetPostcode getPostcode = new GetPostcode(_mediator.Object, _postcodeValidator.Object, _logger.Object);
IActionResult result = await getPostcode.Run(req, CancellationToken.None);
OkObjectResult objectResult = result as OkObjectResult;
Assert.IsNotNull(objectResult);
Assert.AreEqual(200, objectResult.StatusCode);
ResponseWrapper <GetPostcodeResponse, AddressServiceErrorCode> deserialisedResponse = objectResult.Value as ResponseWrapper <GetPostcodeResponse, AddressServiceErrorCode>;
Assert.IsNotNull(deserialisedResponse);
Assert.IsTrue(deserialisedResponse.HasContent);
Assert.IsTrue(deserialisedResponse.IsSuccessful);
Assert.AreEqual(0, deserialisedResponse.Errors.Count());
Assert.AreEqual("NG1 5FS", deserialisedResponse.Content.Postcode);
_mediator.Verify(x => x.Send(It.IsAny <GetPostcodeRequest>(), It.IsAny <CancellationToken>()));
}
public async Task ValidationFails()
{
_mediator.Setup(x => x.Send(It.IsAny <GetPostcodeCoordinatesRequest>(), It.IsAny <CancellationToken>())).Throws <Exception>();
GetPostcodeRequest req = new GetPostcodeRequest()
{
Postcode = null
};
GetPostcode getPostcode = new GetPostcode(_mediator.Object, _postcodeValidator.Object, _logger.Object);
IActionResult result = await getPostcode.Run(req, CancellationToken.None);
ObjectResult objectResult = result as ObjectResult;
Assert.IsNotNull(objectResult);
ResponseWrapper <GetPostcodeResponse, AddressServiceErrorCode> deserialisedResponse = objectResult.Value as ResponseWrapper <GetPostcodeResponse, AddressServiceErrorCode>;
Assert.IsNotNull(deserialisedResponse);
Assert.AreEqual(422, objectResult.StatusCode);;
Assert.IsFalse(deserialisedResponse.HasContent);
Assert.IsFalse(deserialisedResponse.IsSuccessful);
Assert.AreEqual(1, deserialisedResponse.Errors.Count());
Assert.AreEqual(AddressServiceErrorCode.ValidationError, deserialisedResponse.Errors[0].ErrorCode);
_mediator.Verify(x => x.Send(It.IsAny <GetPostcodeCoordinatesRequest>(), It.IsAny <CancellationToken>()), Times.Never);
}
public async Task ErrorThrown()
{
_mediator.Setup(x => x.Send(It.IsAny <GetPostcodeRequest>(), It.IsAny <CancellationToken>())).Throws <Exception>();
GetPostcodeRequest req = new GetPostcodeRequest()
{
Postcode = "NG1 5FS"
};
GetPostcode getPostcode = new GetPostcode(_mediator.Object, _postcodeValidator.Object, _logger.Object);
IActionResult result = await getPostcode.Run(req, CancellationToken.None);
ObjectResult objectResult = result as ObjectResult;
Assert.IsNotNull(objectResult);
ResponseWrapper <GetPostcodeResponse, AddressServiceErrorCode> deserialisedResponse = objectResult.Value as ResponseWrapper <GetPostcodeResponse, AddressServiceErrorCode>;
Assert.IsNotNull(deserialisedResponse);
Assert.AreEqual(500, objectResult.StatusCode);;
Assert.IsFalse(deserialisedResponse.HasContent);
Assert.IsFalse(deserialisedResponse.IsSuccessful);
Assert.AreEqual(1, deserialisedResponse.Errors.Count());
Assert.AreEqual(AddressServiceErrorCode.UnhandledError, deserialisedResponse.Errors[0].ErrorCode);
_mediator.Verify(x => x.Send(It.IsAny <GetPostcodeRequest>(), It.IsAny <CancellationToken>()));
_logger.Verify(x => x.LogErrorAndNotifyNewRelic(It.Is <string>(y => y.Contains("Unhandled error")), It.IsAny <Exception>(), It.IsAny <GetPostcodeRequest>()));
}
public async Task GetPostcode()
{
GetPostcodeHandler getPostcodeHandler = new GetPostcodeHandler(_mapper.Object, _postcodeGetter.Object, _addressDetailsSorter.Object);
GetPostcodeRequest request = new GetPostcodeRequest()
{
Postcode = "ng15fs"
};
GetPostcodeResponse result = await getPostcodeHandler.Handle(request, CancellationToken.None);
Assert.AreEqual("NG1 5FS", result.Postcode);
_postcodeGetter.Verify(x => x.GetPostcodeAsync(It.Is <string>(y => y == "NG1 5FS"), It.IsAny <CancellationToken>()));
_mapper.Verify(x => x.Map <PostcodeDto, GetPostcodeResponse>(It.IsAny <PostcodeDto>()));
_addressDetailsSorter.Verify(x => x.OrderAddressDetailsResponse(It.IsAny <IEnumerable <AddressDetailsResponse> >()));
}
public async Task <IActionResult> Run(
[HttpTrigger(AuthorizationLevel.Function, "get", Route = null)]
[RequestBodyType(typeof(GetPostcodeRequest), "Get Postcode")] GetPostcodeRequest req,
CancellationToken cancellationToken)
{
try
{
NewRelic.Api.Agent.NewRelic.SetTransactionName("AddressService", "GetPostcode");
_logger.LogInformation("C# HTTP trigger function processed a request.");
// This validation logic belongs in a custom validation attribute on the Postcode property. However, validationContext.GetService<IExternalService> always returned null in the validation attribute (despite DI working fine elsewhere). I didn't want to spend a lot of time finding out why when there is lots to do so I've put the postcode validation logic here for now.
if (!await _postcodeValidator.IsPostcodeValidAsync(req.Postcode))
{
return(new ObjectResult(ResponseWrapper <GetPostcodeResponse, AddressServiceErrorCode> .CreateUnsuccessfulResponse(AddressServiceErrorCode.InvalidPostcode, "Invalid postcode"))
{
StatusCode = 422
});
}
if (req.IsValid(out var validationResults))
{
GetPostcodeResponse response = await _mediator.Send(req, cancellationToken);
return(new OkObjectResult(ResponseWrapper <GetPostcodeResponse, AddressServiceErrorCode> .CreateSuccessfulResponse(response)));
}
else
{
return(new ObjectResult(ResponseWrapper <GetPostcodeResponse, AddressServiceErrorCode> .CreateUnsuccessfulResponse(AddressServiceErrorCode.ValidationError, validationResults))
{
StatusCode = 422
});
}
}
catch (Exception ex)
{
_logger.LogErrorAndNotifyNewRelic($"Unhandled error in GetPostcode", ex, req);
return(new ObjectResult(ResponseWrapper <GetPostcodeResponse, AddressServiceErrorCode> .CreateUnsuccessfulResponse(AddressServiceErrorCode.UnhandledError, "Internal Error"))
{
StatusCode = StatusCodes.Status500InternalServerError
});
}
}
