How can I remove try-catch block for the assertThat in the ifPresent()? The compiler gives me only one option for using assertThat in ifPresent(), which is to surround it with try-catch block. Throw the exception again is not allowed too.

@Test
public void testPostRequestThenSaveResponse()
        throws HttpStatusCodeException, JsonProcessingException, IllegalArgumentException, IOException {
    // Should success.
    try {
        ServiceAssignmentImpl.httpPostDeliveryOrder(url, token, sod, customerSite, customer, item, uom, driver)
                .ifPresent((deliveryOrderResponse) -> {
                    // increase DO number for next test.
                    deliveryOrderNum  ;
                    DeliveryOrderResponse savedDOResponse = deliveryOrderResponseRepository
                            .save(deliveryOrderResponse);
                    DeliveryOrderResponse fetchedDOResponse = deliveryOrderResponseRepository
                            .findOne(savedDOResponse.getId());                      
                    try {
                        assertThat(json.write(fetchedDOResponse))
                                .isEqualTo(objectMapper.writeValueAsString(deliveryOrderResponse));
                    } catch (IOException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                });
    } catch (HttpStatusCodeException e) {
        // need getResponseBodyAsString() to see detail error message.
        System.out.println("** HttpStatusCodeException: "   e.getResponseBodyAsString());
        throw e;
    }
}

CodePudding user response：

Just use .get(), your test should not pass if the response is not present, so there is no need to make it conditional.

I've adapted your code as best I could without a MCVE.

    @Test
    public void testPostRequestThenSaveResponse()
            throws HttpStatusCodeException, JsonProcessingException, IllegalArgumentException, IOException {
        // Should success.
        try {
            var = deliveryOrderResponseServiceAssignmentImpl.httpPostDeliveryOrder(url, token, sod, customerSite, customer, item, uom, driver).get()
                   
             // increase DO number for next test.
             deliveryOrderNum  ;
             DeliveryOrderResponse savedDOResponse = deliveryOrderResponseRepository
                                .save(deliveryOrderResponse);
             DeliveryOrderResponse fetchedDOResponse = deliveryOrderResponseRepository
                                .findOne(savedDOResponse.getId());  
             assertThat(json.write(fetchedDOResponse))
                                    .isEqualTo(objectMapper.writeValueAsString(deliveryOrderResponse));
                     
        } catch (HttpStatusCodeException e) {
            // need getResponseBodyAsString() to see detail error message.
            System.out.println("** HttpStatusCodeException: "   e.getResponseBodyAsString());
            throw e;
        }
    }