前言
TestNG有多种并发方式支持，方法的并发，class级的并发，test级的并发等；
根据实际应用可以灵活的配置和使用，下面分别对几种并发方法进行说明：
一、方法级并发
方法级并发即method级并发，此种并发方式需要将xml中的suite标签的parallel属性设置为methods并添加属性thread-count并设置其值，其会将所有的方法按照设定的并发数进行并发，譬如总共有4个测试用例，并发数设置为3，则会开三个线程，那么必然会有两个用例是在同一个线程内的，跟用例在哪个class内没关系，范例如下：
测试用例类一ThreadTest.java：
package com.demo.test.testng;
import org.testng.annotations.Test;
public class ThreadTest {
@Test()
public void test1()
{
long id = Thread.currentThread().getId();
System.out.println("test1-1 thread id:"+id);
}
@Test
public void test2()
{
long id = Thread.currentThread().getId();
System.out.println("test1-2 thread id:"+id);
}
}
测试用例类二ThreadTest2：
package com.demo.test.testng;
import org.testng.annotations.Test;
public class ThreadTest2 {
@Test()
public void test1()
{
long id = Thread.currentThread().getId();
System.out.println("test2-1 thread id:"+id);
}
@Test
public void test2()
{
long id = Thread.currentThread().getId();
System.out.println("test2-2 thread id:"+id);
}
}
xml设置并发数为3，并发类型为methods：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd" >
<suite name="threadSuite" parallel="methods" thread-count="3">
<test name="Test">
<classes>
<class name="com.demo.test.testng.ThreadTest"/>
<class name="com.demo.test.testng.ThreadTest2"/>
</classes>
</test> <!-- Test -->
</suite> <!-- Suite -->
执行结果如下：
[RemoteTestNG] detected TestNG version 6.10.0
[TestNG] Running:
D:\software\workspace\testng\src\main\java\com\demo\test\testCase\ThreadTestXml.xml
test1-1 thread id:12
test2-1 thread id:14
test1-2 thread id:13
test2-2 thread id:13
===============================================
threadSuite
Total tests run: 4, Failures: 0, Skips: 0
===============================================
如上图所示，确实是开了三个线程，且有两个相同线程号的用例并非同一个测试类；
二、class级并发
此并发方式需要将xml中的suite标签内的属性parallel属性设置为classes，且添加属性thread-count并设置其值即可实现class级别并发，其会一个class内的所有方法放在一个线程内，根据线程数设置和总的class数来分配线程，譬如如果设置线程数为3，而class数目为2，则会开两个线程来分别运行两个class，而如果设置线程数为3，且class数目为4则将会有两个class在一个线程内，如下为一个简单的范例：
两个用例类如下：ThreadTest.java
package com.demo.test.testng;
import org.testng.annotations.Test;
public class ThreadTest {
@Test()
public void test1()
{
long id = Thread.currentThread().getId();
System.out.println("test1-1 thread id:"+id);
}
@Test
public void test2()
{
long id = Thread.currentThread().getId();
System.out.println("test1-2 thread id:"+id);
}
}
ThreadTest2.java
package com.demo.test.testng;
import org.testng.annotations.Test;
public class ThreadTest2 {
@Test()
public void test1()
{
long id = Thread.currentThread().getId();
System.out.println("test2-1 thread id:"+id);
}
@Test
public void test2()
{
long id = Thread.currentThread().getId();
System.out.println("test2-2 thread id:"+id);
}
}
测试xml如下：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd" >
<suite name="threadSuite" parallel="classes" thread-count="3" verbose="2">
<test name="Test">
<classes>
<class name="com.demo.test.testng.ThreadTest"/>
<class name="com.demo.test.testng.ThreadTest2"/>
</classes>
</test> <!-- Test -->
</suite> <!-- Suite -->
运行结果：
[RemoteTestNG] detected TestNG version 6.10.0
...
... TestNG 6.10 by Cédric Beust (cedric@beust.com)
...
[TestNG] Running:
D:\software\workspace\testng\src\main\java\com\demo\test\testCase\ThreadTestXml.xml
[TestRunner] Starting executor for test Test with time out:2147483647 milliseconds.
test2-1 thread id:13
test1-1 thread id:12
test2-2 thread id:13
test1-2 thread id:12
PASSED: test1
PASSED: test1
PASSED: test2
PASSED: test2
===============================================
Test
Tests run: 4, Failures: 0, Skips: 0
===============================================
可以看到两个类分别开了一个线程，同一个类中的用例在同一个线程内，符合预期；
那么如果有一个suite下有多个test，这个并发设置会否将所有的test都计算在呢？来试一下，新添加一个测试用例Depend1.java：
package com.demo.test.testng;
import org.testng.Assert;
import org.testng.annotations.Test;
public class DependTest1 {
@Test(groups= {"dependGroup1"})
public void dependTest1()
{
System.out.println("dependTest1");
}
@Test(groups= {"dependGroup1"})
public void dependTest2()
{
System.out.println("dependTest2");
}
@Test(groups="dependGroup2")
public void dependTest4()
{
System.out.println("dependTest4");
Assert.assertFalse(false);
}
}
修改xml为如下：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd" >
<suite name="threadSuite" parallel="classes" thread-count="2" verbose="2">
<test name="Test1">
<classes>
<class name="com.demo.test.testng.ThreadTest"/>
<class name="com.demo.test.testng.ThreadTest2"/>
</classes>
</test> <!-- Test -->
<test name="test2">
<classes>
<class name="com.demo.test.testng.DependTest1">
</class></classes>
</test>
</suite> <!-- Suite -->
再次运行结果如下：
[RemoteTestNG] detected TestNG version 6.10.0
...
... TestNG 6.10 by Cédric Beust (cedric@beust.com)
...
[TestNG] Running:
D:\software\workspace\testng\src\main\java\com\demo\test\testCase\ThreadTestXml.xml
[TestRunner] Starting executor for test Test1 with time out:2147483647 milliseconds.
test2-1 thread id:13
test1-1 thread id:12
test2-2 thread id:13
test1-2 thread id:12
PASSED: test1
PASSED: test1
PASSED: test2
PASSED: test2
===============================================
Test1
Tests run: 4, Failures: 0, Skips: 0
===============================================
[TestRunner] Starting executor for test test2 with time out:2147483647 milliseconds.
dependTest1
dependTest2
dependTest4
PASSED: dependTest1
PASSED: dependTest2
PASSED: dependTest4
===============================================
test2
Tests run: 3, Failures: 0, Skips: 0
===============================================
===============================================
threadSuite
Total tests run: 7, Failures: 0, Skips: 0
===============================================
可以看到是先运行test1(内含两个测试类)，开了两个线程，而后再运行test2(内含一个测试类)，开了一个线程，而这两个test内的三个class是并没有放在一起运行的；
故这种并发设置是根据每个test标签生效的；
三、test级并发
test级并发为将xml中每个test标签下的用例放在一个线程内并根据并发数和tet数目开线程的并发方法，需要将xml中的suite标签内的属性parallel属性设置为tests，且添加属性thread-count并设置其值即可，譬如有一个suite下有两个test且并发数设置为2，那么就会开两个线程，每个线程都包含一个test，范例如下：ThreadTest.java:
package com.demo.test.testng;
import org.testng.annotations.Test;
public class ThreadTest {
@Test()
public void test1()
{
long id = Thread.currentThread().getId();
System.out.println("test1-1 thread id:"+id);
}
@Test
public void test2()
{
long id = Thread.currentThread().getId();
System.out.println("test1-2 thread id:"+id);
}
}
ThreadTest2.java：
package com.demo.test.testng;
import org.testng.annotations.Test;
public class ThreadTest2 {
@Test()
public void test1()
{
long id = Thread.currentThread().getId();
System.out.println("test2-1 thread id:"+id);
}
@Test
public void test2()
{
long id = Thread.currentThread().getId();
System.out.println("test2-2 thread id:"+id);
}
}
修改DependTest1.java:
package com.demo.test.testng;
import org.testng.Assert;
import org.testng.annotations.Test;
public class DependTest1 {
@Test(groups= {"dependGroup1"})
public void dependTest1()
{
long id = Thread.currentThread().getId();
System.out.println("dependTest1 id:"+id);
}
@Test(groups= {"dependGroup1"})
public void dependTest2()
{
long id = Thread.currentThread().getId();
System.out.println("dependTest2 id:"+id);
}
@Test(groups="dependGroup2")
public void dependTest4()
{
long id = Thread.currentThread().getId();
System.out.println("dependTest4 id:"+id);
Assert.assertFalse(false);
}
}
xml设置如下：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd" >
<suite name="threadSuite" parallel="tests" thread-count="2" verbose="2">
<test name="Test1">
<classes>
<class name="com.demo.test.testng.ThreadTest"/>
<class name="com.demo.test.testng.ThreadTest2"/>
</classes>
</test> <!-- Test -->
<test name="test2">
<classes>
<class name="com.demo.test.testng.DependTest1">
</class></classes>
</test>
</suite> <!-- Suite -->
运行结果：
[RemoteTestNG] detected TestNG version 6.10.0
...
... TestNG 6.10 by Cédric Beust (cedric@beust.com)
...
[TestNG] Running:
D:\software\workspace\testng\src\main\java\com\demo\test\testCase\ThreadTestXml.xml
[ThreadUtil] Starting executor timeOut:2147483647ms workers:2 threadPoolSize:2
dependTest1 id:13
test1-1 thread id:12
test1-2 thread id:12
dependTest2 id:13
test2-1 thread id:12
dependTest4 id:13
test2-2 thread id:12
PASSED: test1
PASSED: test2
PASSED: test1
PASSED: test2
===============================================
Test1
Tests run: 4, Failures: 0, Skips: 0
===============================================
PASSED: dependTest1
PASSED: dependTest2
PASSED: dependTest4
===============================================
test2
Tests run: 3, Failures: 0, Skips: 0
===============================================
===============================================
threadSuite
Total tests run: 7, Failures: 0, Skips: 0
===============================================
可见两个test是开了两个线程运行的，且同一个test内的用例都在同一个线程内；
四、instances级并发
此并发方法与前面几种并发方法类似，只是需要修改parallel为instances即可，为一个实例一个并发，范例如下：
package com.demo.test.testng;
import java.util.ArrayList;
import java.util.List;
import org.testng.annotations.Factory;
import org.testng.annotations.Test;
public class FactoryTest {
private String host;
private int port;
public FactoryTest(String host, int port)
{
this.host=host;
this.port=port;
}
@Test
public void login()
{
long id = Thread.currentThread().getId();
System.out.println("login, host:"+host+";port"+port+";id:"+id);
}
@Test(dependsOnMethods="login")
public void logout()
{
long id = Thread.currentThread().getId();
System.out.println("logout, host:"+host+";port"+port+";id:"+id);
}
@Factory
public static Object[] create()
{
List<FactoryTest> list = new ArrayList<FactoryTest>();
list.add(new FactoryTest("10.10.10.1", 8080));
list.add(new FactoryTest("10.10.10.2", 8080));
return list.toArray();
}
}
xml如下：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd" >
<suite name="threadSuite" parallel="instances" thread-count="4" verbose="2">
<test name="Test1">
<classes>
<class name="com.demo.test.testng.FactoryTest" />
</classes>
</test>
</suite> <!-- Suite -->
运行结果如下：
[RemoteTestNG] detected TestNG version 6.10.0
...
... TestNG 6.10 by Cédric Beust (cedric@beust.com)
...
[TestNG] Running:
D:\software\workspace\testng\src\main\java\com\demo\test\testCase\ThreadTestXml.xml
[TestRunner] Starting executor for test Test1 with time out:2147483647 milliseconds.
login, host:10.10.10.1;port8080;id:12
login, host:10.10.10.2;port8080;id:13
logout, host:10.10.10.1;port8080;id:14
logout, host:10.10.10.2;port8080;id:15
PASSED: login
PASSED: login
PASSED: logout
PASSED: logout
===============================================
Test1
Tests run: 4, Failures: 0, Skips: 0
===============================================
===============================================
threadSuite
Total tests run: 4, Failures: 0, Skips: 0
===============================================
如上log可知，两个用例，两组参数，共四条用例开了四个线程，每个用例都是一个实例；
如果是没有@Factory注解的普通用例，则没效果。
五、测试用例级并发
此级并发可以直接在用例内设置，如下为一个范例：
package com.demo.test.testng;
import org.testng.annotations.Test;
public class ThreadTest {
@Test(threadPoolSize = 3, invocationCount = 6, timeOut = 1000)
public void test1()
{
long id = Thread.currentThread().getId();
System.out.println("test1-1 thread id:"+id);
}
@Test
public void test2()
{
long id = Thread.currentThread().getId();
System.out.println("test1-2 thread id:"+id);
}
}
如上图代码所示，test1设置线程数为3，调用次数为6，超时时间为1000ms，运行结果如下：
[RemoteTestNG] detected TestNG version 6.10.0
[TestNG] Running:
C:\Users\dufei\AppData\Local\Temp\testng-eclipse--1263110808\testng-customsuite.xml
[ThreadUtil] Starting executor timeOut:1000ms workers:6 threadPoolSize:3
test1-1 thread id:13
test1-1 thread id:14
test1-1 thread id:12
test1-1 thread id:14
test1-1 thread id:13
test1-1 thread id:12
test1-2 thread id:1
PASSED: test1
PASSED: test1
PASSED: test1
PASSED: test1
PASSED: test1
PASSED: test1
PASSED: test2
===============================================
Default test
Tests run: 7, Failures: 0, Skips: 0
===============================================
===============================================
Default suite
Total tests run: 7, Failures: 0, Skips: 0
===============================================
[TestNG] Time taken by org.uncommons.reportng.HTMLReporter@1d371b2d: 48 ms
如上所示，test1为三个线程，调用六次，超时为1000ms，符合预期；