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，乃至可以是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=UTF⑻?>
<data>
testmethod1>
input>1</button>2>3>4testmethod2testmethod3testmethod4>
>
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 (I
terator i =
employees.elementIterator(); i.hasNext();) {
Element employee =
(Element) i.next();
Map map =
new HashMap();
Map tempMap =
new HashMap();
for (I
terator 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：
import
java.lang.reflect.Method;
import org.testng.annotations.DataProvider;
class TestData {
private List l;
public TestData() {
this.getXmlData();
}
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1下：
TestDataProvider.java文件：
import org.testng.annotations.*
;
class TestDataProvider
extends TestData {
@Test(dataProvider=providerMethod
)
void testmethod1(Map<?,?>
param){
System.out.println(method1 received:+p
aram.get(input
));
}
@Test(dataProvider=providerMethod
)
void testmethod2(Map<?,?>
param){
System.out.println(method2 received:+p
aram.get(input
));
}
@Test(dataProvider=providerMethod
)
void testmethod3(Map<?,?>
param){
System.out.println(method3 received:+p
aram.get(input
));
}
@Test
void testmethod4(){
System.out.println(method4 received:4
);
}
}
我们再回过头来分析1下XML文件,有两个testmethod1结点，testmethod2，testmethod3，testmethod4结点各1个，在TestDataProvider.java文件中，定义了testmethod1，testmethod2，testmethod3，testmethod44个测试函数，且testmethod4没有用到dataProvider，所以运行结果最后应当是testmethod1运行两遍，testmethod2，testmethod3，testmethod4各运行1遍，结果以下：
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
===============================================
也就是说通过这类方式，只需要把测试函数先写好，然后在XML文件中定义好数据就好了，就可以控制函数是不是运行，运行次数且运行的数据。
OK，Let's try.....
