java结合testng，利用XML做数据源的数据驱动示例

testng的功能很强大，利用@DataProvider可以做数据驱动，数据源文件可以是EXCEL，XML，YAML，甚至可以是TXT文本。在这以XML为例：

备注：@DataProvider的返回值类型只能是Object[][]与Iterator<Object>[]

TestData.xml：

<?xml version="1.0" encoding="UTF-8"?>
<data>
    <testmethod1>
        <input>1</input>
        <button>2</button>
    </testmethod1>
    <testmethod1>
        <input>3</input>
        <button>4</button>
    </testmethod1>
    <testmethod2>
        <input>3</input>
        <button>4</button>
    </testmethod2>
    <testmethod3>
        <input>3</input>
        <button>4</button>
    </testmethod3>
    <testmethod4>
        <input>3</input>
        <button>4</button>
    </testmethod4>
</data>

处用DOM4J解析XML，ParserXml.java文件：

package com.test;

import java.io.File;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;

public class ParserXml {

    public List parser3Xml(String fileName) {
        File inputXml = new File(fileName);    
        List list=new ArrayList();                
        int count = 1;
        SAXReader saxReader = new SAXReader();
        try {
            Document document = saxReader.read(inputXml);
            Element employees = document.getRootElement();
            for (Iterator i = employees.elementIterator(); i.hasNext();) {
                Element employee = (Element) i.next();
                Map map = new HashMap();
                Map tempMap = new HashMap();
                for (Iterator j = employee.elementIterator(); j.hasNext();) {
                    Element node = (Element) j.next();                    
                    tempMap.put(node.getName(), node.getText());                    
                }
                map.put(employee.getName(), tempMap);
                list.add(map);
            }
        } catch (DocumentException e) {
            System.out.println(e.getMessage());
        }
        return list;
    }    
     

}

然后把解析出来的list转换成Object[][]类型的数据，且结合在@DataProvider中。

TestData.java文件：

package com.test;

import java.io.File;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import org.testng.annotations.DataProvider;

public class TestData {        
    
    private List l;
    
    public TestData() {    
        this.getXmlData();        
    }
    
    public void getXmlData(){
        ParserXml p = new ParserXml();
        l = p.parser3Xml(new File("src/com/test/TestData.xml").getAbsolutePath());
    }

    @DataProvider
    public Object[][] providerMethod(Method method){        
        List<Map<String, String>> result = new ArrayList<Map<String, String>>();        
        for (int i = 0; i < l.size(); i++) {
            Map m = (Map) l.get(i);    
            if(m.containsKey(method.getName())){                            
                Map<String, String> dm = (Map<String, String>) m.get(method.getName());
                result.add(dm);    
            }
        }  
        Object[][] files = new Object[result.size()][];
        for(int i=0; i<result.size(); i++){
            files[i] = new Object[]{result.get(i)};
        }        
        return files;
    }
    

}

再通过测试文件来测试一下：

TestDataProvider.java文件：

package com.test;

import java.util.Map;

import org.testng.annotations.*;

public class TestDataProvider extends TestData {

    @Test(dataProvider="providerMethod")
    public void testmethod1(Map<?, ?> param){
        System.out.println("method1 received:"+param.get("input"));
    }
     
    @Test(dataProvider="providerMethod")
    public void testmethod2(Map<?, ?> param){
        System.out.println("method2 received:"+param.get("input"));
    }
     
    @Test(dataProvider="providerMethod")
    public void testmethod3(Map<?, ?> param){
        System.out.println("method3 received:"+param.get("input"));
    }
    
    @Test
    public void testmethod4(){
        System.out.println("method4 received:4");
    }

}

我们再回过头来分析一下XML文件,有两个testmethod1结点，testmethod2，testmethod3，testmethod4结点各一个，在TestDataProvider.java文件中，定义了testmethod1，testmethod2，testmethod3，testmethod4四个测试函数，且testmethod4没有用到dataProvider，所以运行结果最后应该是testmethod1运行两遍，testmethod2，testmethod3，testmethod4各运行一遍，结果如下：

method1 received:1
method1 received:3
method2 received:3
method3 received:3
method4 received:4
PASSED: testmethod1({input=1, button=2})
PASSED: testmethod1({input=3, button=4})
PASSED: testmethod2({input=3, button=4})
PASSED: testmethod3({input=3, button=4})
PASSED: testmethod4
===============================================
    Default test
    Tests run: 5, Failures: 0, Skips: 0
===============================================
也就是说通过这种方式，只需要把测试函数先写好，然后在XML文件中定义好数据就行了，就能控制函数是否运行，运行次数且运行的数据。
OK，Let's try.....