CODEWITHSUNDEEP
javarestjunitmockitohttp-status-code-404
Divyesh Kalbhor
Divyesh Kalbhor

Reputation: 445

Mocking new HttpClientErrorException.NotFound

I have a third party service that returns HttpClientErrorException.NotFound. When it returns this exception, I throw the exception from my application saying the input is invalid but for all other exceptions like service unavailable and all, I need to use a default value and proceed further.

My code block is as below:

public String callService(String input)
    {
        String value = "";
        try
        {
            value = service.callMethod(input);
        }
        catch(HttpClientErrorException.NotFound e1)
        {
            throw new ApplicationException("Invalid Input")
        }
        catch(Exception e)
        {
            value = "US";
        }
        return value;
    }

When I am writing JUnit for this, how do I mock the call for service.callMethod(input) and return HttpClientErrorException.NotFound?

I tried mocking and sending the status code as below but it does not work.

Junit Test case method is as below:

@Test(expected = ApplicationException.class)
public void callServiceInvalidInput() throws ApplicationException 
{
    String inputValue = "JLR";
    when(externalService.callMethod(inputValue))        
    .thenThrow(new HttpClientErrorException(HttpStatus.NOT_FOUND));
    
    String result = handler.callService(inputValue);
}

When I mock the service call, the catch clause that gets executed is Exception e and not the previous one. The reason is object e is instanceof HttpClientErrorException when mocked; but when the actual service call happens, it is instance of HttpClientErrorException$NotFound

Upvotes: 3

Views: 7725

Answers (1)

Divyesh Kalbhor
Divyesh Kalbhor

Reputation: 445

I found an answer when I tried to check how the NotFound is actually set.

when(externalService.callMethod(inputValue)) 
.thenThrow(HttpClientErrorException.create(HttpStatus.NOT_FOUND, "not found", null, null, null));

I called the create method to return that particular inner class.

Upvotes: 6

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