Easyb初体验

今天看了一个借助Groovy语言实现的行为驱动框架-easyb，感觉很有趣，简单总结一下跟大家分享：

 

easyb 是基于Groovy的DSL实现的可适用于Java和Groovy的测试框架。它提供了对Ant和Maven的支持来执行stories测试。（下面的例子我们以Ant为例）

它的目的就是： 让我们的单元测试跟接近于业务语言，为此他提供了三个关键字：given, when, then。见名知义，given是提供一个上下文，when是提供一个业务场景，then是执行一些断言。

 

如何开始呢？

1、首先我们需要从官方下载easyb发布包，它包括commons-cli-VERSION.jar, easyb-VERSION.jar, groovy-VERSION.jar，将这些依赖引入到你的项目中；

2、编写你的业务接口和实现类，这些步骤与平常无异，说明省略；

3、定义build.xml，启动easyb：

<?xml version="1.0"?>
<project name="easyb" basedir="." default="all">
	<property name="src.dir" value="src" />
	<property name="lib.dir" value="lib" />
	<property name="target.dir" value="target" />
	<property name="classes.dir" value="bin" />
	<property name="behaviors.dir" value="stories" />
	<property name="test.dir" value="test" />

	<path id="easyb.classpath">
		<fileset file="${lib.dir}/*.jar" />
	</path>

	<taskdef name="easyb" classname="org.disco.easyb.ant.BehaviorRunnerTask">
		<classpath>
			<path refid="easyb.classpath" />
		</classpath>
	</taskdef>
	
	<target name="init">
		<delete dir="${target.dir}"/>
	</target>
	
	<target name="all" depends="init">		
		<mkdir dir="${target.dir}"/>
		
		<easyb failureProperty="easyb.failed">		
			<classpath>
				<path refid="easyb.classpath" />
				<pathelement path="${classes.dir}" />
			</classpath>
			
			<behaviors dir="${behaviors.dir}">
				<!-- Discounts.story and DiscountsStory.groovy are both valid name -->
				<include name="*.story"/>
			</behaviors>
			
			<report location="${target.dir}/story.txt" format="txtstory"/>
			<report location="${target.dir}/story" format="txtspecification"/>
			<report location="${target.dir}/story.xml" format="xml"/>
		</easyb>
		
	</target>
	
	<fail if="easyb.failed" message="easyb reported a failure"/>

</project>

 从上面的XML文件中我们可以看到easyb首先在ANT中注册它的Task，然后调用easyb，测试用例由*Story.groovy或者*.story提供，report生成报告，支持多种格式输出。

4、下面看看easyb的魔力所在：

 

import com.samueli.service.AccountServiceImpl;
import com.samueli.service.LoginServiceImpl;

scenario "User enters valid credentials", {
 given "user account already exists",{
       accountService = new AccountServiceImpl()
       loginService = new LoginServiceImpl()
       loginService.setAccountService(accountService)
  
 }
 when "user logins",{
	 account = loginService.login("meera", "password")
 }
 then "the system returns a valid account",{
 account.getUserid().shouldBe "meera"
 account.getPassword().shouldBe "password"
 
 }
}

scenario "User enters invalid credentials", {
 given "user account already exists",{
       accountService = new AccountServiceImpl()
       loginService = new LoginServiceImpl()
       loginService.setAccountService(accountService)
 }
 when "user logins with invalid password",{
 account = loginService.login("meera", "meera")
 }
 then "a null account should be returned",{
 account.shouldBe null
 }
}


scenario "Invalid login with a null password", {
 given "user account already exists",{
        accountService = new AccountServiceImpl()
       loginService = new LoginServiceImpl()
       loginService.setAccountService(accountService)
 }
 
 when "user logins with null password", {
 enternull = {
  loginService.login("meera", null)
 }
}

then "an exception should be thrown", {
 ensureThrows(BusinessException.class){
  enternull()
 }
} 
}

5、上面的测试利用了easyb的三个关键词，模拟了一系列业务场景和断言。

我们运行ANT，可能会得到这样的运行结果：

Buildfile: E:\MyProject\TestEasyb\build.xml
init:
   [delete] Deleting directory E:\MyProject\TestEasyb\target
all:
    [mkdir] Created dir: E:\MyProject\TestEasyb\target
    [easyb] easyb is preparing to process 1 file(s)
    [easyb] Running login service test story (LoginServiceTest.story)
    [easyb] Scenarios run: 3, Failures: 0, Pending: 0, Time Elapsed: 0.828 sec
    [easyb] 3 total behaviors run with no failures
    [easyb] easyb execution passed
BUILD SUCCESSFUL
Total time: 2 seconds

具体的业务代码，我们可以参考附件，Good Luck！

 

参考：

http://groovy.dzone.com/articles/is-easyb-easy

https://www6.software.ibm.com/developerworks/education/j-easyb/section2.html