上一章介紹了ant+testng+xlst，其實到了這里，我們就可以直接搭建在Jenkins服務器上，讓它跑起來！但是，我之前部署在Jenkins上的UI自動化用例偶爾會報錯，我去查看代碼，又沒有什么問題，再運行一次，它又正常了，其實這種問題，我相信不止我一個人遇到！
說到這里，不得不引進TestNg框架的一個接口：IRetryAnalyzer，它有一個方法retry(ITestResult iTestResult)實現對失敗的測試用例多次執行，可以有效的排除上面我說的那種情況。那么怎么來把這個方法給用起來呢？TestNg框架里的Annotion(注解)里可以直接指向該類。
一、下面舉個簡單的列子
1.IRetryAnalyzer接口的實現，
package com.Retry;
import org.testng.IRetryAnalyzer;
import org.testng.ITestResult;
public class OverrideRetry implements IRetryAnalyzer{
private int count = 1;
private int max_retry_count = 3;
/*
* OverrideRetry實現接口IRetryAnalyzer的方法，重復執行失敗用例
* (non-Javadoc)
* @see org.testng.IRetryAnalyzer#retry(org.testng.ITestResult)
*/
@Override
public boolean retry(ITestResult iTestResult) {
System.out.println("執行用例："+iTestResult.getName()+"，第"+count+"次失敗");
if(count<max_retry_count){
count++;
return true;
}
return false;
}
}
2.TestNg測試類
@Test(retryAnalyzer= OverrideRetry.class)
public void b(){
System.out.println(2/0);
}
3.運行結果
二、通過上面的demo，我們實現了對失敗的測試用例進行二次執行。但是愛思考的同學就會發現，上面的demo不太適合用到真正的自動化測試里，因為每個@test里都要進行retryAnalyzer配置，重復勞動，太累了。
下面給大家介紹TestNg另外一個接口IAnnotationTransformer，判斷用例是否達到重試的要求。
1.IRetryAnalyzer接口的實現，
package com.Retry;
import org.testng.IRetryAnalyzer;
import org.testng.ITestResult;
import org.testng.Reporter;
public class OverrideRetry implements IRetryAnalyzer{
private int count = 1; //統計測試用例失敗的次數
private int Max_Fail_Count = 3; //測試用例最大失敗次數
@Override
public boolean retry(ITestResult iTestResult) {
String msg = "執行用例："+iTestResult.getName()+"第"+count+"次運行失敗";
System.out.println(iTestResult);
Reporter.log(msg);
if(count<Max_Fail_Count){
count++;
return true;
}
return false;
}
}
2.IAnnotationTransformer接口的實現。
package com.Transformer;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import org.testng.IRetryAnalyzer;
import org.testng.annotations.ITestAnnotation;
import org.testng.internal.annotations.IAnnotationTransformer;
import com.Retry.OverrideRetry;
public class OverrideTransformer implements IAnnotationTransformer{
@SuppressWarnings("rawtypes")
@Override
public void transform(ITestAnnotation iTestAnnotation,
Class class1, Constructor constructor, Method method) {
IRetryAnalyzer iRetryAnalyzer = iTestAnnotation.getRetryAnalyzer();
System.out.println("transform(),iRetryAnalyzer:"+iRetryAnalyzer);
if(iRetryAnalyzer==null){
iTestAnnotation.setRetryAnalyzer(OverrideRetry.class);
}
}
}
3.testng.xml,里面添加了監聽器listener，監聽類com.Transformer.OverrideTransformer里的重試函數transform(ITestAnnotation iTestAnnotation, Class class1, Constructor constructor, Method method) ，判斷下面的測試用例是否失敗，達到重試要求.
<?xml version="1.0" encoding="UTF8"?>
<suite name = "suite">
<listeners> <listener class-name="com.Transformer.OverrideTransformer"></listener> </listeners>
<test name="CloudPoint" >
<parameter name="resp_code" value="200"/>
<classes name = "Normal">
<class name="com.TestNg.CloudPoint.CP_Normal_1"/>
<class name="com.TestNg.CloudPoint.CP_Normal_2"/>
<class name="com.TestNg.CloudPoint.CP_Exception_androidlost"/>
<class name="com.TestNg.CloudPoint.CP_Exception_kvlost"/>
</classes>
</test>
<test name="DDL" > <parameter name="resp_code" value="200"/> <classes name = "Normal"> <class name="com.TestNg.DDL.DDL_Normal_1"/> </classes> </test>
</suite>
4.運行build.xml,標紅部分是重試函數對失敗用例的運行結果的輸出
Buildfile: D:\java\workspaces\GroupApi\build.xml
clean:
[delete] Deleting directory D:\java\workspaces\GroupApi\bin
compile:
[echo] mkdir
[mkdir] Created dir: D:\java\workspaces\GroupApi\bin
[javac] Compiling 11 source files to D:\java\workspaces\GroupApi\bin
run:
[testng] [TestNGContentHandler] [WARN] It is strongly recommended to add "<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd" >" at the top of your file, otherwise TestNG may fail or not work as expected.
[testng] transform(),iRetryAnalyzer:null
[testng] transform(),iRetryAnalyzer:null
[testng] transform(),iRetryAnalyzer:null
[testng] transform(),iRetryAnalyzer:null
[testng] transform(),iRetryAnalyzer:null
[testng] transform(),iRetryAnalyzer:null
[testng] transform(),iRetryAnalyzer:null
[testng] transform(),iRetryAnalyzer:null
[testng] transform(),iRetryAnalyzer:null
[testng] excel file is D:\java\workspaces\GroupApi\interfacaecase.xlsx
[testng] log4j:WARN No appenders could be found for logger (org.apache.http.client.protocol.RequestAddCookies).
[testng] log4j:WARN Please initialize the log4j system properly.
[testng] log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
[testng] excel file is D:\java\workspaces\GroupApi\interfacaecase.xlsx
[testng] excel file is D:\java\workspaces\GroupApi\interfacaecase.xlsx
[testng] excel file is D:\java\workspaces\GroupApi\interfacaecase.xlsx
[testng] excel file is D:\java\workspaces\GroupApi\interfacaecase.xlsx
[testng] excel file is D:\java\workspaces\GroupApi\interfacaecase.xlsx
[testng] excel file is D:\java\workspaces\GroupApi\interfacaecase.xlsx
[testng] true
[testng] excel file is D:\java\workspaces\GroupApi\interfacaecase.xlsx
[testng] true
[testng] excelread:{} is String
[testng] data:{} is String
[testng] D:\java\workspaces\GroupApi
[testng] excel file is D:\java\workspaces\GroupApi\interfacaecase.xlsx
[testng] [TestResult name=StatusCode status=FAILURE method=DDL_Normal_1.StatusCode()[pri:0, instance:com.TestNg.DDL.DDL_Normal_1@50f8360d] output={null}] [testng] [TestResult name=StatusCode status=FAILURE method=DDL_Normal_1.StatusCode()[pri:0, instance:com.TestNg.DDL.DDL_Normal_1@50f8360d] output={null}] [testng] [TestResult name=StatusCode status=FAILURE method=DDL_Normal_1.StatusCode()[pri:0, instance:com.TestNg.DDL.DDL_Normal_1@50f8360d] output={null}]
[testng] ===============================================
[testng] suite
[testng] Total tests run: 11, Failures: 1, Skips: 2
[testng] ===============================================
[testng] The tests failed.
[xslt] Processing D:\java\workspaces\GroupApi\test-output\testng-results.xml to D:\java\workspaces\GroupApi\test-output\index1.html
[xslt] Loading stylesheet D:\java\workspaces\GroupApi\test-output\testng-results.xsl
BUILD SUCCESSFUL
Total time: 8 seconds
5.測試報告輸出
