无法解析的 JSON 字符串异常答案

【问题标题】：Unparsable JSON String exception无法解析的 JSON 字符串异常
【发布时间】：2021-03-22 23:03:43
【问题描述】：

get 方法的所有测试都有效，这条线对他们来说很好：

    .andExpect(content().json(ow.writeValueAsString(orders.get(0))))

代码如下：测试设置

    @Autowired
private MockMvc mockMvc;

@MockBean
private OrderService orderService;

private List<OrderDTO> orders;
private String ordersJson;
ObjectWriter ow;

@BeforeEach
void setUp() throws JsonProcessingException {
    orders = new LinkedList<>();
    for (int i = 1; i <= 3; i++) {
        orders.add(new OrderDTO.OrderDTOBuilder("test"+i, i*100)
                .build());
    }
    ow = new ObjectMapper().writer().withDefaultPrettyPrinter();
    ordersJson = ow.writeValueAsString(orders);
}

失败的测试：

    @Test
@DisplayName("POST /orders test - order saved with status 200")
@WithMockUser(roles = "PUBLISHER")
void saveNewOrder() throws Exception {
    Mockito.doReturn(orders.get(0)).when(orderService).saveOrder(any(),any(),any(),any());

    mockMvc.perform(
            MockMvcRequestBuilders.post("/orders")
                    .content(ow.writeValueAsString(orders.get(0)))
                    .contentType(MediaType.APPLICATION_JSON)
                    .accept(MediaType.APPLICATION_JSON))
            .andDo(MockMvcResultHandlers.print())
            .andExpect(content().json(ow.writeValueAsString(orders.get(0))))
            .andExpect(status().isOk())
            .andReturn();
}

测试控制器方法：

    @PostMapping("")
public OrderDTO saveNewOrder(@RequestBody OrderDTO orderData,
                             @RequestBody List<Long> processes,
                             @RequestBody Long clientId,
                             @RequestBody Long deliveryId)
        {
    return orderService.saveOrder(orderData, processes, clientId, deliveryId);
}

这是控制台消息：

org.json.JSONException: Unparsable JSON string: 

at org.skyscreamer.jsonassert.JSONParser.parseJSON(JSONParser.java:56)
at org.skyscreamer.jsonassert.JSONCompare.compareJSON(JSONCompare.java:50)
at org.skyscreamer.jsonassert.JSONCompare.compareJSON(JSONCompare.java:125)
at org.skyscreamer.jsonassert.JSONAssert.assertEquals(JSONAssert.java:415)
at org.skyscreamer.jsonassert.JSONAssert.assertEquals(JSONAssert.java:394)
at org.skyscreamer.jsonassert.JSONAssert.assertEquals(JSONAssert.java:336)
at org.springframework.test.util.JsonExpectationsHelper.assertJsonEqual(JsonExpectationsHelper.java:61)
at org.springframework.test.web.servlet.result.ContentResultMatchers.lambda$json$9(ContentResultMatchers.java:215)
at org.springframework.test.web.servlet.MockMvc$1.andExpect(MockMvc.java:196)
at eu.mrndesign.matned.metalserwisproductionrest.controller.OrderControllerTest.saveNewOrder(OrderControllerTest.java:166)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:688)
at org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:131)
at org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:149)
at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestableMethod(TimeoutExtension.java:140)
at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestMethod(TimeoutExtension.java:84)
at org.junit.jupiter.engine.execution.ExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(ExecutableInvoker.java:115)
at org.junit.jupiter.engine.execution.ExecutableInvoker.lambda$invoke$0(ExecutableInvoker.java:105)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:106)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:64)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:45)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:37)
at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:104)
at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:98)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod$6(TestMethodTestDescriptor.java:210)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod(TestMethodTestDescriptor.java:206)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:131)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:65)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:129)
at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:127)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:126)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:84)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1540)
at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:143)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:129)
at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:127)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:126)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:84)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1540)
at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:143)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:129)
at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:127)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:126)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:84)
at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:32)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:51)
at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:108)
at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:88)
at org.junit.platform.launcher.core.EngineExecutionOrchestrator.lambda$execute$0(EngineExecutionOrchestrator.java:54)
at org.junit.platform.launcher.core.EngineExecutionOrchestrator.withInterceptedStreams(EngineExecutionOrchestrator.java:67)
at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:52)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:96)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:75)
at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:69)
at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230)
at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58)

【问题讨论】：

标签： json spring string unit-testing spring-mvc

【解决方案1】：

您发布的内容有 2 个选项。

选项 1：通过更新到 required=false 来放松您的 API

@PostMapping("")
public OrderDTO saveNewOrder(@RequestBody OrderDTO orderData,
                             @RequestBody(required=false) List<Long> processes,
                             @RequestBody(required=false) Long clientId,
                             @RequestBody(required=false) Long deliveryId)
        {
    return orderService.saveOrder(orderData, processes, clientId, deliveryId);
}

选项 2：在测试中添加所有必需的项目。这是一个 sn-p，现在是真正的代码。

MockMvcRequestBuilders.post("/orders")
                    .content("send all the required data with orderData, processes, clientId and deliveryId"))

【讨论】：

非常感谢！我选择了选项 1。效果很好！