Flowable 6 Part 2 IntroTest.java

@Test
public testIntroProcess() {
    ....
    HistoricVariableInstance historicVariable = historyService.createHistoricVariableInstanceQuery()
        .processInstanceId(processInstance.getId())
        .singleResult();
    assertEquals("variablePresent", historicVariable.getVariableName());
    assertEquals(false, historicVariable.getValue());
    
    processInstance = runtimeService.startProcessInstanceByKey("intro", Collections.singletonMap("intro", (Object) "a test intro value"));
    List<HistoricVariableInstance> historicVariables = historyService
        .createHistoricVariableInstanceQuery()
        .processInstanceId(processInstance.getId())
        .orderByVariableName()
        .asc()
        .list();
    
    assertEquals("intro", historicVariables.get(0).getVariableName());
    assertEquals("a test intro value", historicVariables.get(0).getValue());
    assertEquals("variablePresent", historicVariables.get(1).getVariableName());
    assertEquals(true, historicVariables.get(1).getValue());
    
    processEngine.close();     
}