如何测试使用Mockito更新数据的方法？

Question

我想测试一个当前数据的方法，使用id指示它应该是什么类型的记录，并“替换”数据。

我写了一个测试方法的开头，但我在某个点上卡住了，例如，我不知道如何正确实现断言以使测试通过。

服务

public Invoice updateInvoice(Long invoiceId, Invoice invoiceDetails) {
        Invoice invoice= new Book();
        Invoice.setName(invoiceDetails.getName);
        Invoice.setPrize(invoiceDetails.getPrize);
        Invoice.setDate(invoiceDetails.getDate);
        
        return invoiceRepository.save(invoice);
    }

控制器

@PutMapping("/invoices/{invoiceId}")
    public Invoice updateInvoice(@PathVariable(value = "invoiceId") Long id, @RequestBody invoiceDetails) {
        return  invoiceService.updateInvoice(id, invoiceDetails);
    }

测试方法（发票1是一个示例对象，其中包含构造函数传递的数据以测试更新记录）这就是我停下来的地方，因为我不知道如何做出断言来理解它

@Test
    void shouldUpdateInvoice() {
       
       Invoice updateInvoice = new Invoice(1, "firstInvoice", 30, "2000-01-01");
       Mockito.when(invoiceRepository.findById(invoice1.getId())).thenReturn(Optional.of(invoice1));
       Mockito.when(invoiceRepository.save(updateInvoice)).thenReturn(updateInvoice);
   }

Answer 1

您需要在invoiceRepository上添加验证。拯救

verify(invoiceRepository, times(1)).save(any());

并可能删除

Mockito.when(invoiceRepository.save(updateInvoice)).thenReturn(updateInvoice);

如果您想查看您的更新是否正确，您可以使用这样的ArgumentCaptor

.....
@Captor
private ArgumentCaptor<Invoice> invoiceCaptor;
....

....
verify(invoiceRepository, times(1)).save(invoiceCaptor.capture()); 
Invoice invoice = invoiceCaptor.getValue(); // invoice references the object that was put in the mock in the method "save("
assertThat(invoice.getPrize(), is(1234)); // custom assertions here
...