Replace behaviour for external tasks in tests

Camunda 7 Topics Discussion & Questions
1

Hello. I created simple Camunda spring boot project and also created simple BPMN process with switcher. process.bpmn (5.5 KB)

I used service task with external implementation as a spring beans. I want to write tests for process but I don’t want to test how beans works. Because in general I use external implementation for connection to DB and save parameter to context or REST call to internal apps. For example I want skip execute service task(one) and instead set variables for switcher. I tried to use camunda-bpm-assert-scenario for test process and wrote simple test WorkflowTest.

I noticed if I use @MockBean for One.class then Camunda skip delegate execution. If use @Mock then Camunda execute delegate execution.

PS Sorry for bad english

One

@Service
public class One implements JavaDelegate {
    private final Random random = new Random();


    @Override
    public void execute(DelegateExecution execution) throws Exception {
        System.out.println("Hello, One!");
        execution.setVariable("check", isValue());
    }

    public boolean isValue() {
        return random.nextBoolean();
    }
}

WorkflowTest

@SpringBootTest
@RunWith(SpringRunner.class)
@Deployment(resources = "process.bpmn")
public class WorkflowTest extends AbstractProcessEngineRuleTest {

    @Mock
    private ProcessScenario insuranceApplication;

    @MockBean
    private One one;

    @Before
    public void init() {
        MockitoAnnotations.initMocks(this);
        Mocks.register("one", one);
    }

    @Test
    public void shouldExecuteHappyPath() throws Exception {
        // given
        when(insuranceApplication.waitsAtServiceTask("Task_generator")).thenReturn(externalTaskDelegate -> {
                    externalTaskDelegate.complete(withVariables("check", true));
                }
        );

        String processDefinitionKey = "camunda-test-process";
        Scenario scenario = Scenario.run(insuranceApplication)
                .startByKey(processDefinitionKey) // either just start process by key ...
                .execute();

        verify(insuranceApplication).hasFinished("end_true");
        verify(insuranceApplication, never()).hasStarted("three");
        verify(insuranceApplication, atLeastOnce()).hasStarted("two");

        assertThat(scenario.instance(insuranceApplication)).variables().containsEntry("check", true);
    }

}
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