TestNG·八 并发测试


一、 Concurrent testing:

下面的例子是输出进程ID,threadPoolSize用来指明线程池的大小,也就是并发的线程数目是多少

5次调用,有3个线程可调用

@Test(invocationCount = 5, threadPoolSize = 3,groups = { "t9"})
public void smallThreadPool() {
System.out.println("Thread#: " +Thread.currentThread().getId());
}

页面输出

[TestNG] Running:
  E:\android\selenium\test_wdng_java\src\testing.xml
Thread#: 13
Thread#: 15
Thread#: 14
Thread#: 15
Thread#: 15
===============================================
Suite
Total tests run: 5, Failures: 0, Skips: 0
===============================================

若改成5次调用,有5个线程可调用

Thread#: 10
Thread#: 14
Thread#: 12
Thread#: 11
Thread#: 13

二、Concurrent running of tests

TestNG可以以多线程的模式运行所有的test,这样可以获得最大的运行速度,最大限度的节约执行时间。当然,并发运行也是有代价的,就是需要我们的代码是线程安全的。

并发运行测试的话,需要我们指定运行的配置文件,一个示例如下:

<suite name="Concurrent Suite" parallel="methods" thread-count="2" verbose="1" >
<>……<>
</suite>

1.Parallel=”methods”的意思是指TestNG会将method作为并发的元子单位,即每个method运行在自己的thread中。如果parallel=”tests”,则指会将 test 作为并发的元子单位

2.Thread-count=”2”是指,运行的时候,并发度为2,同时会有两个线程在运行。

例:

@Test(groups = { "t8"})
public void aThreadPool() {
System.out.println("#ThreadA: " +Thread.currentThread().getId());
}
@Test(groups = { "t8"})
public void bThreadPool() {
System.out.println("#ThreadB: " +Thread.currentThread().getId());
}
@Test(groups = { "t8"})
public void cThreadPool() {
System.out.println("#ThreadC: " +Thread.currentThread().getId());
}
--------------------------------------------------------------------
<test name="Test" parallel="methods" thread-count="2">

输出结果:

#ThreadB: 11
#ThreadC: 11
#ThreadA: 10
===============================================
Suite
Total tests run: 3, Failures: 0, Skips: 0
===============================================

改成<test name="Test" parallel="tests" thread-count="2"> 页面输出(因为aThreadPool(),bThreadPool(),cThreadPool()都在一个test下面)

#ThreadA: 1
#ThreadB: 1
#ThreadC: 1
===============================================
Suite
Total tests run: 3, Failures: 0, Skips: 0
===============================================