java 与testng利用XML做数据源的数据驱动示例详解
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.....
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