Automation with Selenium,Junit, Ant

What is Selenium
How does Selenium work
History and how it started
About Ant
And Junit

Much of the technologies above do not or will not need an introduction if you already know them or can read them from the links above.

More over today’s article is more about how we can use all the three selenium, ant and junit to come up with an automated solution for regressive testing.

Please refer to the documentation links above for the basic knowledge on any of the used tools.

I am assuming that you know how to record a test in selenium if you dont then go here

Now that you do know how to record and save the tests simply save them in any directory structure you like as long as they follow the right package convention. like com.foo.bar
this would mean the file should be in directory like com/foo/bar. Conventionally and logically today that is how the TestCase is compiled through the ant script. If the package is not the right path then compile time errors will occur.

My calling target for running the whole procedure should look like this

< target name="build_tests" depends="clean, compile, start-server,  tests, stop-server" / >

Details of the depending targets are as follows.
clean: would clean the entire build directories etc to make sure nothing from our past is carried forward into the future.

compile: should compile

start-server: should start the selenium server.

tests: should run the selenium tests.

stop-server: should stop the selenium server once all tests have been executed.

How to start a selenium server from Ant?

    < target name="start-server" >
        < java jar="lib/selenium-server.jar" fork="true" spawn="true" >
            < arg line="-timeout 30" / >
            < jvmarg value="-Dhttp.proxyHost=proxy.proxyhost.com" / >
            < jvmarg value="-Dhttp.proxyPort=44444" / >
        < / java >
    < / target >

 

The target above is simply taking the selenium-server.jar which is in the classpath and running the main-class from it. the proxy parameters are optional.

How to stop the server from Ant?

   
 < target name="stop-server" >
        < get taskname="selenium-shutdown" 
            src="http://localhost:4444/selenium-server/driver/?cmd=shutDown"	
            dest="result.txt" ignoreerrors="true" / >
        < echo taskname="selenium-shutdown" message="DGF Errors during shutdown are expected" / >
    < / target >
 

The selenium server starts on port 4444 by default and to tell it to shutdown is simple, the command in the src is passed to it. cmd=shutDown
That should just shutdown the server.

Executing the test cases?
Selenium Test cases are Junit tests cases and that’s how they are treated in this tutorial.
Thus some of you will be very much familiar with the ant targets junit and junitreport. However I will describe how the following is working.
the following target will run the selenium tests and print a summary report to the ${dir}
The includes and excludes, simply tell the target which files to include or exclude while running the test cases. This is typically done when you don’t want some tests cases to be included or your source for tests and the application are in the same directory and you only want to include something like Test*.class.

  < target name="tests" depends="compileonly" description="runs JUnit tests" >
    < echo message="running JUnit tests" / >
    < junit printsummary="on" dir=".." haltonfailure="off" haltonerror="off" timeout="${junit.timeout}" fork="on" maxmemory="512m" showoutput="true" >
      < formatter type="plain" usefile="false" / >
      < formatter type="xml" usefile="true" / >
      < batchtest todir="${testoutput}" filtertrace="on" >
        < fileset dir="${src}" >
          < includesfile name="${tests.include}" / >
          < excludesfile name="${tests.exclude}" / >
        < / fileset >
      < / batchtest >
      < classpath >
        < pathelement path="${classes}" / >
        < pathelement path="${build.classpath}" / >
      < / classpath >
    < / junit >

The following will take the formatted output from the lines above and generate a report out of it in xml and html and place the results in the ${reports}/index.html
A sample Junit test report might look like this.

   < echo message="running JUnit Reports" / >
   < junitreport todir="${reports}" >
      < fileset dir="${reportdir}" >
        < include name="Test*.xml" / >
      < / fileset >
      < report format="frames" todir="${reports}" / >
    < / junitreport >
    < echo message="To see your Junit results, please open ${reports}/index.html}" / >
  < / target >

In general you can add all of this to your nightly build through any of the CI servers like Cruise Control. Also as a general practice you will need to do a little more then just executing this target every night depending on your application. For instance cleaning up of resource centers like Databases etc.

Calling wsadmin scripts from ant

You can simply add the following to a target.
For the following wsadmin should be in your PATH env.

< exec dir="." executable="wsadmin.bat" logError="true" failonerror="true" output="wsconfig.out" >
< arg line="-lang jython -f ../../createQFactory.py"/ >
< /exec >

All output will be logged to wsconfig.out

Creating an SVN wrap for your build using Ant

Today after along break I would jump right on to one of the interesting topics in my den these days.

One of my friends was lately troubled with doing some SVN stuff like merging etc. And a lot of people will agree with me on their first experiences. 🙂 I think.

While Automated builds take a lot of our time I thought I could plug in with some automated merging and a few other tasks. Its hard to go over all of that in one post but I will try putting in some basic stuff to get us started.

I call it the SVN Wrap.

Step 1.
Create a simple script file for wrapping svn and our environment.

A simple bat script could look like the following

@echo off
svn %*

However some people might want to add some environment variables to it. And that is where the strength of the this file comes in. You can tailor the environment dynamically!
e.g.

set LC_ALL=C
set SVN_HOME=svn-win32-1.4.6
set PATH=%SVN_HOME%\bin;%PATH%;

FYI: By setting LC_ALL I am telling the system I disregard the default locale. Its just used as an example here. for more information refer to the svnbook at http://svnbook.red-bean.com/

Step 2.
Create the build.xml
It doesnt get simpler then this.

I have created a project with the name CI-Test

<project name="CI-Test" default="status" basedir=".">
	<description>
		This is a POC for SVN Wrap.
	</description>
</project>

Importantly I am setting a property local.branch so that I can tell svn where my code has been checked out locally.

And finally the target that will take a status of the branch. for more details on the status command you could go here.

In general this target will give a general overview of the files and thier state at the moment.

	<target name="status">
		<echo message="Following is the status for this tree."/>
		<echo message="output is logged here: status.out" />
	          <exec dir="${local.branch}" executable="ci-svn.bat" output="status.out">
            		<arg line="status"/>
          	</exec>
	</target>

With in the target there are a few echo commands but the key construct is the exec.
The exec is going to do the following

dir=”${local.branch}” – would meant execute the command in this directory
executable=”ci-svn.bat” – Identifies the executable
and finally the output attribute to show where the output of this activity goes.
The following line will pass the parameters to the executable
< arg line=”status” />
And in this case its sending a status command to svn.

For more details on exec goto. http://ant.apache.org/manual/

Now I would presume both these files in saved in one direcotry as

1. ci-svn.bat
2. build.xml

To run this simply goto your command console and once in the same directory execute by running
ant

It is assumed that all paths to java,ant and svn are set on your console or system.

As an output you should be able to see a status.out in the same directory from where you executed ant.

Hopefully this should get you started with doing some bit of svn commands from ant. And that just opens a lot of more possibilities in your build environment.

The complete code listing of the build file is as follows.

<project name="CI-Test" default="status" basedir=".">
	<description>
		This is a POC for SVN Wrap.
	</description>
 
	<property name="local.branch" value="C:\branches\my-branch"/>
 
	<target name="status">
		<echo message="Following is the status for this tree."/>
		<echo message="output is logged here: status.out" />
	          <exec dir="${local.branch}" executable="ci-svn.bat" output="status.out">
            		<arg line="status"/>
          	</exec>
	</target>
 
</project>