Mockito Thread.class尝试捕获块中的异常不会提高覆盖率

Question

我正在尝试用线程在try-catch块中测试异常。使用Mocito在try block中使用sleep方法。我使用了下面的mockito测试方法，它按预期通过了测试，但从未提高我的测试覆盖率。coverage报告显示waitForSync方法中的catch块从未到达。有人能帮我吗我在这里错过了什么？

public class CreateAccount{
@Autowired
private AccountService accountService,

@Autowired
private BuildAccountResponse buildAccountResponse

 @Value("${waitForSync:0}")
  private Integer accountSyncWaitTimeMs;

public AccountResponse createMyAccount(AccountRequest request, String accountId) {

    accountService.checkIfAccountExists(accountId);

   Optional<AccountResponse> myResponse= buildAccountResponse.create(request, accountId);

   waitForSync(accountId);

   return myResponse.get();
}
}

WaitForSync方法

private void waitForSync(String accountId) {
try{
if (accountSyncWaitTimeMs>0){
Thread.sleep(accountSyncWaitTimeMs)
}
catch { (Exception e)       
Logger.warn("Failed to apply wait account sync");   

}

我的mockito测试方法

@InjectMocks
@Spy
private CreateAccount createAccount;

private static final accountWaitTime = 1;

ReflectionTestUtils.setField(createAccount, "accountSyncWaitTimeMs" , accountWaitTime);

private AccountRequest request;

private static final String accountId = "AccountId";

@Test (expected = Exception.class)
public void createAccount_waiSync_Exception () {

 doThrow(new InterruptedException()).when(Thread.class);

createAcccount.createMyAccount(request, accountId);
}

测试按预期通过，但线下的测试从未覆盖，所以基本上我在覆盖率方面增加了测试，所以应该如何改进它？

catch { (Exception e)       
Logger.warn("Failed to apply wait account sync"); 

Answer 1

你可以在Mocktio之上使用PowerMocktio，你可以检查Mocktio的新版本，他们promise会在mocking静态方法上做一些改进

@RunWith(PowerMockRunner.class)
@PrepareForTest(Thread.class)
public class ExampleTest{

    @InjectMocks
    @Spy
    private CreateAccount createAccount;
    private static final accountWaitTime = 1;
    ReflectionTestUtils.setField(createAccount, "accountSyncWaitTimeMs" , accountWaitTime);

    private AccountRequest request;
    private static final String accountId = "AccountId";

  @Test (expected = Exception.class)
  public void createAccount_waiSync_Exception () {
    PowerMockito.mockStatic(Thread.class);
    PowerMockito.doThrow(new InterruptedException()).when(Thread.class);
    Thread.sleep(anyLong()); // or set the value you want

    createAcccount.createMyAccount(request, accountId);
  }

}