用testng进行多线程单元测试

Question

我正在学习使用TestNG进行单元测试。我想将变量“val”的唯一值传递给线程池中的每个线程，但它没有接收它。

这里是testng类：

public class NewTest {

    int val = 0;

  /*@Test(dataProvider = "dp")
  public void f(Integer n, String s) {
  }*/
  @BeforeMethod
  public void beforeMethod() {
      long id = Thread.currentThread().getId();
      System.out.println("beforeMethod. Thread id is: " + id);



  }

  @AfterMethod
  public void afterMethod() {/*
      long id = Thread.currentThread().getId();
      System.out.println("After test-method. Thread id is: " + id);*/
  }


  @DataProvider
  public Object[][] dp() {
    return new Object[][] {
      new Object[] { 1, "a" },
      new Object[] { 2, "b" },
    };
  }
  @BeforeClass
  public void beforeClass() {

  }

  @AfterClass
  public void afterClass() {
  }

  @BeforeTest
  public void beforeTest() {
      val++;
  }

  @AfterTest
  public void afterTest() {
  }

  @BeforeSuite
  public void beforeSuite() {
  }

  @AfterSuite
  public void afterSuite() {
  }

  @Test(threadPoolSize = 5, invocationCount = 5, timeOut = 1000)
  public void methodOne(){
      System.out.println("Value of val from MethodOne::"+val);
  }
}

和输出：

[ThreadUtil]启动执行器超时:1000msworkers:5ThreadPoolSize:5BeForeMethod。线程id为：15 BeforeMethod。线程id为：12 BeforeMethod。线程id为：14 BeforeMethod。线程id为：13 BeforeMethod。线程id为：16 val from methodOne::1 val from methodOne::1 val from methodOne:1 val from methodOne:1 val from methodOne:1 val from methodOne:1 val from methodOne:1 val from methodOne:1 val from methodOne:1 val from methodOne:1

Answer 1

请小心:@beforeTest不是@beforeMethod(@beforeSuite->@beforeTest->@beforeClass->@beforeMethod和

然后，@beforeTest只被 调用一次：在您的示例中，只调用一次，val总是1。