嘗試在失敗測試之前在before（）方法上運行重試

Question

我有一個不穩定的ENV，我正在運行JUnit測試。

許多測試在before()方法上失敗，因為連接/網絡/非測試相關的問題，我想添加一個重試前一個方法的功能 - 在完全失敗測試之前。

我添加了代碼片段，但我不確定這是最好的方式/做法...

//hold the max number of before attempts
final private int retries = 3;
//will count number of retries accrued
private int retrieCounter = 0 ;

@Before
public void before() {
    try {
        //doing stuff that may fail due to network / other issues that are not relevant to the test
        setup = new Setup(commonSetup);
        server = setup.getServer();
        agents = setup.getAgents();
        api = server.getApi();
        setup.reset();
    }
    //if before fails in any reason
    catch (Exception e){
        //update the retire counter
        retrieCounter++;
        //if we max out the number of retries exit with a runtime exception
        if (retrieCounter > retries)
            throw new RuntimeException("not working and the test will stop!");
        //if not run the before again
        else this.before();
    }

}

Answer 1

您可以使用TestRule ，請查看我如何立即重新運行失敗的JUnit測試的答案？ 。 這應該做你想要的。 如果您使用該答案中定義的重試規則，如果它拋出異常，這實際上將重新執行before（）：

public class RetryTest {
  @Rule
  public Retry retry = new Retry(3);

  @Before
  public void before() {
    System.err.println("before");
  }

  @Test
  public void test1() {
  }

  @Test
  public void test2() {
      Object o = null;
      o.equals("foo");
  }
}

這會產生：

before
test2(junit_test.RetryTest): run 1 failed
before
test2(junit_test.RetryTest): run 2 failed
before
test2(junit_test.RetryTest): run 3 failed
test2(junit_test.RetryTest): giving up after 3 failures
before