@ApiOperation(value = "Query for historic variable instances", tags = { "History", "Query" },
            notes = "All supported JSON parameter fields allowed are exactly the same as the parameters found for getting a collection of historic process instances,"
            + " but passed in as JSON-body arguments rather than URL-parameters to allow for more advanced querying and preventing errors with request-uri’s that are too long. "
            + "On top of that, the query allows for filtering based on process variables. "
            + "The variables property is a JSON-array containing objects with the format as described here.")
    @ApiResponses(value = {
            @ApiResponse(code = 200, message = "Indicates request was successful and the tasks are returned"),
            @ApiResponse(code = 400, message = "Indicates an parameter was passed in the wrong format. The status-message contains additional information.") })
    @PostMapping(value = "/query/historic-variable-instances", produces = "application/json")
    public DataResponse<HistoricVariableInstanceResponse> queryVariableInstances(@RequestBody HistoricVariableInstanceQueryRequest queryRequest, @ApiParam(hidden = true) @RequestParam Map<String, String> allRequestParams) {

        return getQueryResponse(queryRequest, allRequestParams);
    }
@Test
    @Deployment
    public void testQueryVariableInstances() throws Exception {
        HashMap<String, Object> processVariables = new HashMap<>();
        processVariables.put("stringVar", "Azerty");
        processVariables.put("intVar", 67890);
        processVariables.put("booleanVar", false);

        ProcessInstance processInstance = runtimeService.startProcessInstanceByKey("oneTaskProcess", processVariables);
        Task task = taskService.createTaskQuery().processInstanceId(processInstance.getId()).singleResult();
        taskService.complete(task.getId());
        task = taskService.createTaskQuery().processInstanceId(processInstance.getId()).singleResult();
        taskService.setVariableLocal(task.getId(), "taskVariable", "test");

        ProcessInstance processInstance2 = runtimeService.startProcessInstanceByKey("oneTaskProcess", processVariables);

        String url = RestUrls.createRelativeResourceUrl(RestUrls.URL_HISTORIC_VARIABLE_INSTANCE_QUERY);

        ObjectNode requestNode = objectMapper.createObjectNode();
        requestNode.put("variableName", "stringVar");
        assertResultsPresentInDataResponse(url, requestNode, 2, "stringVar", "Azerty");

        requestNode = objectMapper.createObjectNode();
        requestNode.put("variableName", "booleanVar");
        assertResultsPresentInDataResponse(url, requestNode, 2, "booleanVar", false);

        requestNode = objectMapper.createObjectNode();
        requestNode.put("variableName", "booleanVar2");
        assertResultsPresentInDataResponse(url, requestNode, 0, null, null);

        requestNode = objectMapper.createObjectNode();
        requestNode.put("processInstanceId", processInstance.getId());
        assertResultsPresentInDataResponse(url, requestNode, 4, "taskVariable", "test");

        requestNode = objectMapper.createObjectNode();
        requestNode.put("processInstanceId", processInstance.getId());
        requestNode.put("excludeTaskVariables", true);
        assertResultsPresentInDataResponse(url, requestNode, 3, "intVar", 67890);

        requestNode = objectMapper.createObjectNode();
        requestNode.put("processInstanceId", processInstance2.getId());
        assertResultsPresentInDataResponse(url, requestNode, 3, "stringVar", "Azerty");

        requestNode = objectMapper.createObjectNode();
        requestNode.put("taskId", task.getId());
        assertResultsPresentInDataResponse(url, requestNode, 1, "taskVariable", "test");

        requestNode = objectMapper.createObjectNode();
        requestNode.put("taskId", task.getId());
        requestNode.put("variableName", "booleanVar");
        assertResultsPresentInDataResponse(url, requestNode, 0, null, null);

        requestNode = objectMapper.createObjectNode();
        requestNode.put("variableNameLike", "%Var");
        assertResultsPresentInDataResponse(url, requestNode, 6, "stringVar", "Azerty");

        requestNode = objectMapper.createObjectNode();
        requestNode.put("variableNameLike", "%Var2");
        assertResultsPresentInDataResponse(url, requestNode, 0, null, null);

        requestNode = objectMapper.createObjectNode();
        ArrayNode variableArray = objectMapper.createArrayNode();
        ObjectNode variableNode = objectMapper.createObjectNode();
        variableArray.add(variableNode);
        requestNode.set("variables", variableArray);
        variableNode.put("name", "stringVar");
        variableNode.put("value", "Azerty");
        variableNode.put("operation", "equals");
        assertResultsPresentInDataResponse(url, requestNode, 2, "stringVar", "Azerty");

        variableNode.removeAll();
        requestNode.set("variables", variableArray);
        variableNode.put("name", "taskVariable");
        variableNode.put("value", "test");
        variableNode.put("operation", "equals");
        assertResultsPresentInDataResponse(url, requestNode, 1, "taskVariable", "test");

        variableNode.removeAll();
        requestNode.set("variables", variableArray);
        variableNode.put("name", "taskVariable");
        variableNode.put("value", "test");
        variableNode.put("operation", "notEquals");
        assertErrorResult(url, requestNode, HttpStatus.SC_BAD_REQUEST);
    }