java - 为什么@BeforeSuite和@AfterSuite在单独的线程中运行？

Question

我将 ThreadLocal 变量初始化为 @BeforeSuite 的一部分。但由于它在单独的线程中运行，因此初始化的变量不会传递给@Test。有人可以向我解释这种行为背后的原因吗？我们可以让 @BeforeSuite 与其他带注释的方法一样作为同一线程的一部分运行吗？

代码

import org.testng.annotations.*;

public class SampleTest {

ThreadLocal<String> s = new ThreadLocal<>();

@BeforeSuite
public void beforeSuite(){
    System.out.println("beforeSuite");
    s.set("Initialisation value");
    System.out.println(Thread.currentThread().getId());
}

@BeforeClass
public void beforeclass(){
    System.out.println("beforeclass");
    System.out.println(Thread.currentThread().getId());
}

@BeforeTest
public void beforetest(){
    System.out.println("beforetest");
    System.out.println(Thread.currentThread().getId());
}

@BeforeMethod
public void beforemethod(){
    System.out.println("beforemethod");
    System.out.println(Thread.currentThread().getId());
}

@AfterMethod
public void aftermethod(){
    System.out.println("aftermethod");
    System.out.println(Thread.currentThread().getId());
}

@AfterTest
public void afterTest(){
    System.out.println("afterTest");
    System.out.println(Thread.currentThread().getId());
}

@AfterClass
public void afterclass(){
    System.out.println("afterclass");
    System.out.println(Thread.currentThread().getId());
}

@AfterSuite
public void afterSuite(){
    System.out.println("afterSuite");
    System.out.println(Thread.currentThread().getId());
}

@Test
public void testMethod(){
    System.out.println(Thread.currentThread().getId());
    System.out.println("My actual Test");
    System.out.println("Value of threadlocal variable s : "+s.get());
}

}

代码输出

beforeSuite
1

beforetest
11

beforeclass
11

beforemethod
11

11
My actual Test
Value of threadlocal variable s : null

aftermethod
11

afterclass
11

afterTest
11

afterSuite
1  

===============================================
Titan Automation
Total tests run: 1, Passes: 1, Failures: 0, Skips: 0
===============================================

Testng.xml 文件

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE suite SYSTEM "https://testng.org/testng-1.0.dtd">
<suite name="Automation" parallel="tests">
    <test name="Test Cases" thread-count="4">
        <classes>
            <class name="org.example.SampleTest"></class>
        </classes>
    </test>
</suite>

Answer 1

之所以在运行其他方法的地方分离出不同的线程，是因为您通过选择parallel="tests"启用了并行策略。 .

如果您希望所有配置方法在同一线程上运行，则应通过设置 parallel="false" 来禁用并行性。在你的<suite>标签。