TestNg之监听器@Listener

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TestNg之监听器@Listener

@Listener位置

和其他的注解放在方法上不同，@Listener是放在类上的 在这里插入图片描述

@Listener注解内容

首先我们来看一下@Listener这个注解里面是什么

//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by FernFlower decompiler)
//
​
package org.testng.annotations;
​
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.testng.ITestNGListener;
​
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.TYPE})
public @interface Listeners {
    Class<? extends ITestNGListener>[] value() default {};
}

发现这里需要一个extends过ITestNGListener的接口 在这里插入图片描述 那我们就来看一下ITestNGListener这个接口是什么

ITestNGListener和ITestListener

emmmm，空的

//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by FernFlower decompiler)
//
​
package org.testng;
​
public interface ITestNGListener {
}

但是仔细看一下它下面的接口，发现很多接口都extends过ITestNGListener，其中就有ITestListener，就是我们要实习的

//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by FernFlower decompiler)
//
​
package org.testng;
​
public interface ITestListener extends ITestNGListener {
    void onTestStart(ITestResult var1);
​
    void onTestSuccess(ITestResult var1);
​
    void onTestFailure(ITestResult var1);
​
    void onTestSkipped(ITestResult var1);
​
    void onTestFailedButWithinSuccessPercentage(ITestResult var1);
​
    void onStart(ITestContext var1);
​
    void onFinish(ITestContext var1);
}

我们要做的是就是来implements这个接口

我们要做的是就是来implements这个接口

实现ITestListener接口

package com.newcrud.learn;
​
import org.testng.ITestContext;
import org.testng.ITestListener;
import org.testng.ITestResult;
​
public class MyTestNgListener implements ITestListener {
​
    @Override
    public void onTestStart(ITestResult iTestResult) {
        System.out.println("onTestStart仅在启动任何测试方法时才调用onTestStart()"+iTestResult.getName());
    }
​
    @Override
    public void onTestSuccess(ITestResult iTestResult) {
        System.out.println("onTestSuccess用例执行成功"+iTestResult.getName());
    }
​
    @Override
    public void onTestFailure(ITestResult iTestResult) {
        System.out.println("onTestFailure用例执行失败"+iTestResult.getName());
    }
​
    @Override
    public void onTestSkipped(ITestResult iTestResult) {
        //就比如你的一个方法依赖的方法执行失败了，导致你这个方法被跳过了，这个时候你就可以对跳过执行的用例进行一种补偿措施
        System.out.println("onTestSkipped跳过测试"+iTestResult.getName());
    }
​
    @Override
    public void onTestFailedButWithinSuccessPercentage(ITestResult iTestResult) {
        System.out.println("emmm，这个我也不知道干什么的，但是平时也不用");
    }
​
    @Override
    public void onStart(ITestContext iTestContext) {
        System.out.println("onStart在任何测试方法开始时执行"+iTestContext.getName());
    }
​
    @Override
    public void onFinish(ITestContext iTestContext) {
        System.out.println("onFinish任何测试用例完成执行时, 都会调用onFinish()"+iTestContext.getName());
    }
}

如何使用Listener

在测试类上加@Linstener

package com.newcrud.testngTest;
​
​
import org.testng.Assert;
import org.testng.annotations.Listeners;
import org.testng.annotations.Test;
@Listeners({com.newcrud.learn.MyTestNgListener.class})
public class TestFour  {
    @Test
    public void testZ(){
        System.out.println("Z");
    }
    @Test()
    public void testY(){
        System.out.println("Y");
        Assert.assertEquals(1,2);
    }
    @Test(dependsOnMethods = {"testY"})
    public void testM(){
        System.out.println("我要被skip了");
    }
​
}

执行结果

onStart在任何测试方法开始时执行NewCRUD
onTestStart仅在启动任何测试方法时才调用onTestStart()testY
Y
onTestFailure用例执行失败testY
​
java.lang.AssertionError: 
Expected :2
Actual   :1
<Click to see difference>
​
​
  at org.testng.Assert.fail(Assert.java:94)
  at org.testng.Assert.failNotEquals(Assert.java:513)
  at org.testng.Assert.assertEqualsImpl(Assert.java:135)
  at org.testng.Assert.assertEquals(Assert.java:116)
  at org.testng.Assert.assertEquals(Assert.java:389)
  at org.testng.Assert.assertEquals(Assert.java:399)
  at com.newcrud.testngTest.TestFour.testY(TestFour.java:16)
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.lang.reflect.Method.invoke(Method.java:498)
  at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:104)
  at org.testng.internal.Invoker.invokeMethod(Invoker.java:645)
  at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:851)
  at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1177)
  at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:129)
  at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:112)
  at org.testng.TestRunner.privateRun(TestRunner.java:756)
  at org.testng.TestRunner.run(TestRunner.java:610)
  at org.testng.SuiteRunner.runTest(SuiteRunner.java:387)
  at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:382)
  at org.testng.SuiteRunner.privateRun(SuiteRunner.java:340)
  at org.testng.SuiteRunner.run(SuiteRunner.java:289)
  at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
  at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
  at org.testng.TestNG.runSuitesSequentially(TestNG.java:1293)
  at org.testng.TestNG.runSuitesLocally(TestNG.java:1218)
  at org.testng.TestNG.runSuites(TestNG.java:1133)
  at org.testng.TestNG.run(TestNG.java:1104)
  at com.intellij.rt.testng.IDEARemoteTestNG.run(IDEARemoteTestNG.java:66)
  at com.intellij.rt.testng.RemoteTestNGStarter.main(RemoteTestNGStarter.java:109)
​
onTestStart仅在启动任何测试方法时才调用onTestStart()testZ
Z
onTestSuccess用例执行成功testZ
onTestSkipped跳过测试testM
​
Test ignored.
onFinish任何测试用例完成执行时, 都会调用onFinish()NewCRUD

在xml文件上添加Listener

将测试类上的@Listener注解去掉，放到xml文件中

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd">
<suite name="All Test Suite">
    <listeners>
        <listener class-name="com.newcrud.learn.MyTestNgListener"></listener>
    </listeners>
    <test  name="testonly">
        <classes>
            <class name="com.newcrud.testngTest.TestFour"></class>
        </classes>
    </test>
</suite>

结果

onStart在任何测试方法开始时执行testonly
onTestStart仅在启动任何测试方法时才调用onTestStart()testY
Y
​
java.lang.AssertionError: 
Expected :2
Actual   :1
<Click to see difference>
​
​
  at org.testng.Assert.fail(Assert.java:94)
  at org.testng.Assert.failNotEquals(Assert.java:513)
  at org.testng.Assert.assertEqualsImpl(Assert.java:135)
  at org.testng.Assert.assertEquals(Assert.java:116)
  at org.testng.Assert.assertEquals(Assert.java:389)
  at org.testng.Assert.assertEquals(Assert.java:399)
  at com.newcrud.testngTest.TestFour.testY(TestFour.java:14)
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.lang.reflect.Method.invoke(Method.java:498)
  at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:104)
  at org.testng.internal.Invoker.invokeMethod(Invoker.java:645)
  at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:851)
  at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1177)
  at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:129)
  at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:112)
  at org.testng.TestRunner.privateRun(TestRunner.java:756)
  at org.testng.TestRunner.run(TestRunner.java:610)
  at org.testng.SuiteRunner.runTest(SuiteRunner.java:387)
  at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:382)
  at org.testng.SuiteRunner.privateRun(SuiteRunner.java:340)
  at org.testng.SuiteRunner.run(SuiteRunner.java:289)
  at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
  at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
  at org.testng.TestNG.runSuitesSequentially(TestNG.java:1293)
  at org.testng.TestNG.runSuitesLocally(TestNG.java:1218)
  at org.testng.TestNG.runSuites(TestNG.java:1133)
  at org.testng.TestNG.run(TestNG.java:1104)
  at com.intellij.rt.testng.IDEARemoteTestNG.run(IDEARemoteTestNG.java:66)
  at com.intellij.rt.testng.RemoteTestNGStarter.main(RemoteTestNGStarter.java:109)
​
onTestFailure用例执行失败testY
onTestStart仅在启动任何测试方法时才调用onTestStart()testZ
Z
onTestSuccess用例执行成功testZ
​
Test ignored.
onTestSkipped跳过测试testM
onFinish任何测试用例完成执行时, 都会调用onFinish()testonly
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