Testing JSONProcessingException

Question

I am trying to test following code with JMockito.

Code

@RunWith(MockitoJUnitRunner.class)
public class StepFunctionClientTest {

    private static final String TEST_STATE_MACHINE_ARN = "testStateMachineArn";
    private static final String TEST_EXECUTION_ARN = "testExecutionArn";
    private ObjectNode additionalData;
    private ObjectMapper objectMapper;

    @Mock AWSStepFunctions mockAWSStepFunctions;
    private StepFunctionClient stepFunctionClient;

    @Before
    public void setUp() throws Exception {
        stepFunctionClient = new StepFunctionClient(mockAWSStepFunctions, TEST_STATE_MACHINE_ARN);
        additionalData = TestData.getObjectNode(TestData.ADDITIONAL_DATA);
        objectMapper = new ObjectMapper();
    }

    @Test(expected=InternalServiceException.class)
    public void test() throws Exception {
        StartExecutionResult result = new StartExecutionResult();
        result.setExecutionArn(TEST_EXECUTION_ARN);

        when(mockAWSStepFunctions.startExecution(any())).thenThrow(new JsonProcessingException("Error"){});

        stepFunctionClient.startExecution(
                TEST_ORDER_ID,
                TEST_PAYMENT_STATUS,
                null,
                false);
    }
}

Error

[junit] Testcase: test(com.project.orderservice.client.StepFunctionClientTest):       Caused an ERROR
[junit] Unexpected exception, expected<com.project.commons.exceptions.InternalServiceException> but was<org.mockito.exceptions.base.MockitoException>
[junit] java.lang.Exception: Unexpected exception, expected<com.project.commons.exceptions.InternalServiceException> but was<org.mockito.exceptions.base.MockitoException>
[junit]     at org.mockito.internal.runners.DefaultInternalRunner$1.run(Unknown Source)
[junit]     at org.mockito.internal.runners.DefaultInternalRunner.run(Unknown Source)
[junit]     at org.mockito.internal.runners.StrictRunner.run(Unknown Source)
[junit]     at org.mockito.junit.MockitoJUnitRunner.run(Unknown Source)
[junit] Caused by: org.mockito.exceptions.base.MockitoException: 
[junit] Checked exception is invalid for this method!
[junit] Invalid: com.project.orderservice.client.StepFunctionClientTest$1: Error
[junit]     at com.project.orderservice.client.StepFunctionClientTest.test(StepFunctionClientTest.java:157)

What i am missing here?

add the full stacktrace, and the entire test class for better picture — Maciej Kowalski
– Maciej Kowalski, Commented Jan 12, 2018 at 17:21

Maciej Kowalski · Accepted Answer · 2018-01-12 17:36:45Z

1

JsonProcessingException is a checked exception, meaning that if you want to throw it, the method has to have it in its signature. Otherwise you get the error above:

Checked exception is invalid for this method!

You can throw only the checked exception listed here -> StartExecutionRequest.

Or a RuntimeException.

answered Jan 12, 2018 at 17:36

Maciej Kowalski

26.7k12 gold badges59 silver badges66 bronze badges

Sign up to request clarification or add additional context in comments.

4 Comments

Em Ae Over a year ago

thansk for pointing it out. after a little closer look i noticed that JsonProcessingException is being thrown by the ObjectMapper which is not being mocked in my testcases.

Maciej Kowalski Over a year ago

just add a @Mock annotation then instead of creating the real instance

Em Ae Over a year ago

what do you mean? @Mock annotation where? The ObjectMapper is being created internally in StepFunctionClient. Can i mock an object which is not being injected from outside?

Maciej Kowalski Over a year ago

If its an instance field then you could use the @InjectMocks on the client

Collectives™ on Stack Overflow

Testing JSONProcessingException

1 Answer 1

4 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

4 Comments

Your Answer

Sign up or log in

Post as a guest

Related