结果为集成测试返回空字符串

Question

我一直在网上寻找，我似乎无法找到解决问题的方法。我有一个如下所示的集成测试，它应该返回字符串“Lossrates calculated successfully”，而是返回一个＆lt; []＆gt;空白字符串。

    @Test
public void test() throws Exception {

    String name = "mockName";
    String date = new Date().toString();

    LossrateRequest lossrateRequest = new LossrateRequest();
    lossrateRequest.setAsOfDate(new Date().toString());
    lossrateRequest.setName(name);

    Date asOfDate = new SimpleDateFormat("EEE MMM d HH:mm:ss zzz yyyy").parse(date);
    boolean testStatus = lossrateRequest.getName().isEmpty();

    String expected = "Lossrates calculated successfully.";

    Mockito.when(lossrateCalculationService.calculateHistory(name, asOfDate)).thenReturn(testStatus);
    Mockito.when(lossrateService.saveGenerated(name, asOfDate, lossrateService.numOfRowsInHistoricalLoss()))
            .thenReturn(testStatus);

    RequestBuilder requestBuilder = MockMvcRequestBuilders.post("/api/historical-loss/generate")
            .accept(MediaType.APPLICATION_JSON);

    MvcResult result = mockMvc.perform(requestBuilder).andReturn();

    assertEquals(expected, result.getResponse().getContentAsString());
}

我正在考虑由于MvcResult行而发生的事情，但我在网上到处都有andReturn()空白，因此我不知道为什么它会返回空白。