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Copyright 2009, Build Lackey Labs (see last slide for licensing terms) - Selenium - Browser-Based Automated Testing of Web Apps.

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Presentation on theme: "Copyright 2009, Build Lackey Labs (see last slide for licensing terms) - Selenium - Browser-Based Automated Testing of Web Apps."— Presentation transcript:

1 Copyright 2009, Build Lackey Labs (see last slide for licensing terms) - Selenium - Browser-Based Automated Testing of Web Apps Under Continuous Integration Presented By Chris Bedford Founder & Lackey at Large Build Lackey Labs Company Overview Founded 2008 Services Release engineering & Build/Test Automation for Java Environments Spring/Hibernate & Groovy/Grails App Development Training: Spring/Groovy/Grails & Build/Test Automation Technologies Employees Chris Bedford Mike Jackson

2 Copyright 2009, Build Lackey Labs (see last slide for licensing terms) Agenda Different Ways To Test a Grails App Unit, Integration, Functional Selenium Demo of IDE Architecture Alternatives (Canoo WebTest) Automating Testing Using Selenium Maven Demo Cargo Viewing Test Results Lab 1 – maven project Ant Continuous Integration With Hudson How to write functional tests with Selenium KEY TAKE- AWAYS How to set up Selenium Testing On Grails Apps In Continuous Integration Building With Ant Building with maven Continuous Integration With Hudson

3 Copyright 2009, Build Lackey Labs (see last slide for licensing terms) Unit Unit Tests are created and run developer and run using framework like Junit or TestNG test class or package functionality in isolation heavy use of mocks and stubs tests should execute quickly and be run often to catch problems early on Integration If you are dependent on someone elses stuff, the test includes your stuff and theirs Verifies that two or more components work together, usually directly, and not with mocks To simplify test set-up components typically execute same JVM process Functional Testing Run application in container Exercise functionality via a client side agent that executes Javascript. Agent could be either: your actual target browser (Firefox, IE, etc.) [Selenium's approach] a Javascript engine embedded into test framework [Canoo Webtest's approach] Different Ways To Test a Java Web App Real http requests Separate client Mock http requests Client requests from same process Package or class level scope increasingly coarse grained components under test

4 Copyright 2009, Build Lackey Labs (see last slide for licensing terms) Manual Steps Involved In Running Selenium Before running Selenium Functional Tests we need to Compile classes Run unit and integration tests bail on functional tests if we catch problems with lighter weight tests Package.war file Install and start the container in which we want to run the.war Deploy the.war to the container unless your running Jetty, which runs embedded in your app Launch target browser Launch Selenium on desired test suite

5 Copyright 2009, Build Lackey Labs (see last slide for licensing terms) Launching Selenium

6 Copyright 2009, Build Lackey Labs (see last slide for licensing terms) Recording New Selenium Tests

7 Copyright 2009, Build Lackey Labs (see last slide for licensing terms) Exporting test commands to 3GL (Java, etc.)

8 Copyright 2009, Build Lackey Labs (see last slide for licensing terms) Individual tests referenced by the suite are recorded using their paths relative to the suite. For simplicity put your suite and all tests in the same directory (to start) Saving New or Modified Selenium Tests

9 Copyright 2009, Build Lackey Labs (see last slide for licensing terms) Selenium Components Selenium IDE Selenese Commands Enable test author to simulate navigation, clicks Make assertions about expected responses Selenium RC Client side library that enables you to program more sophistication into your tests than the IDE allows (conditions, looping, error handling) The Selenium Server which launches and kills browsers, interprets and runs the Selenese commands passed from the test program, and acts as an HTTP proxy,

10 Copyright 2009, Build Lackey Labs (see last slide for licensing terms) Selenium Client Side Library & Server In Action HTTP Selenium-server.jar Source: Reports back results of test to client HTTP (javascript) (client side java script / Ajax portion of application under Test – originates from here ) Application under test (server side)

11 Copyright 2009, Build Lackey Labs (see last slide for licensing terms) A Look Same Origin Policy (Which Seleniums Architecture Circumvents) Same origin policy: Forbids JavaScript code running on a web page from interacting with resources which originate from any web site other than the one which served up that web page

12 Copyright 2009, Build Lackey Labs (see last slide for licensing terms) Selenium RC Server Acting As Proxy To Avoid Same Origin Policy Restrictions What happens when a test suite starts ? 1) client/driver establishes connection w.selenium-RC 2) Selenium-RC server launches a browser (or reuses an old one) with URL that injects Selenium-Cores javascript into browser- loaded web page. 3) client-driver passes a Selenese command to the server e.g.: open command 4) Server interprets the command and then triggers the corresponding javascript execution to execute that command within the browser (say open page in app under test)s 5) Request to open the page is routed through proxy server 6) 7) Proxy forwards request to app server App server returns response

13 Copyright 2009, Build Lackey Labs (see last slide for licensing terms) Functional Test Alternatives: Canoo vs Selenium Canoo Web Test built on HtmlUnit pros: excellent test reporting allows you to pin point errors in test very easily. faster to run (no browser spin up overhead) better support for non HTML content (like spread sheets) cons: Weaker IDE (for test recording and playback) develop tests in Ant or Gant only Selenium pros: develop tests in HTML markup or 3 GL's like Java, Ruby, etc. run test in actual browser vs.embedded Javascript engine used by NO popular browser platform cons: slower to start. see 'pros' listed Canoo RECOMMENDATION: Id go with Canoo for testing a REST-ful API

14 Copyright 2009, Build Lackey Labs (see last slide for licensing terms) Canoo Web Test Reports Canoo's reports show overall test results and let you drill down into any test

15 Copyright 2009, Build Lackey Labs (see last slide for licensing terms) Canoo Web Test Reports (cont.) Click to review a copy of the response HTML page corresponding to the first test step that failed

16 Copyright 2009, Build Lackey Labs (see last slide for licensing terms) Gluing together the steps in your build process Before running Functional Tests need to Compile Run unit and integration tests bail on functional tests if we catch problems with lighter weight tests Package.war file Install the container in which we want to run the.war (optional) Deploy the.war to the container (optional – can just do grails run-app) Launch your target browser Launch Selenium on your desired test suite To automate this process you can use ant maven Groovy/Gant scripts Gradle Our example uses Maven (demo) (tour of pom.xml files that wire together our build steps)

17 Copyright 2009, Build Lackey Labs (see last slide for licensing terms) deploy Compile Unit Test Integration Test Package.war file Download And Install Tomcat

18 Copyright 2009, Build Lackey Labs (see last slide for licensing terms) Structure of our demo project mvn install Maven Repository Lives in $HOME/.m2/repostitory or /Docuemts and Settings/ /.m2/repository declares the artifact it produces to be org.example:demo:1.1 declares a a dependency on org.example:demo:1.1

19 Copyright 2009, Build Lackey Labs (see last slide for licensing terms) Demo All Tests Pass Some Tests Fail

20 Copyright 2009, Build Lackey Labs (see last slide for licensing terms) Maven Basics Convention over configuration Standardizes where things live and what they are named Lets you know where to look for the things you need… and what to do when you find them Project Object Model (pom.xml) specifies the complete recipe for your build what artifact type are your producing ? (the name, the version…) what are the dependencies (things you need) to produce that artifact ? What plug-ins activate at what phases in the build life cycle ? Shared Repository for storing artifacts that result from a build Convention for naming artifacts Build Life Cycle each project is typically responsible for producing a distinct artifact (a.k.a. packaging) type.jar,.war,.ear, etc. each packaging type has an associated life cycle (ordered set of build phases) Nested build project (module) structure overall driver for your build project lives at top level of a directory hierarchy sub-modules underneath the parent can be either individual components of your product …or…. key phases in your build

21 Copyright 2009, Build Lackey Labs (see last slide for licensing terms) Maven Nested Module Structure, Dependencies and Shared Repo mvn install Maven Repository Lives in $HOME/.m2/repostitory or /Docuemts and Settings/ /.m2/repository declares the artifact it produces to be org.example:demo:1.1 declares a a dependency on org.example:demo:1.1

22 Copyright 2009, Build Lackey Labs (see last slide for licensing terms) Maven pom.xml – Nested Module Structure

23 Copyright 2009, Build Lackey Labs (see last slide for licensing terms) Maven pom.xml – Dependency Relationships Maven Repository org.example:demo:1.1

24 Copyright 2009, Build Lackey Labs (see last slide for licensing terms) Hooking Maven Plug-ins Maven Into the Build Life Cycle pom.xml Build Life Cycle Phases validate generate/process-sources process-sources generate/process-resources compile test prepare-package package pre-integration-test integration-test post-integration-test verify install deploy

25 Copyright 2009, Build Lackey Labs (see last slide for licensing terms) Cargo A set of APIs that assists in installing web containers (such as Tomcat, JBoss) booting and shutting them down deploying web applications (.wars and.ears) Invokable via ant tasks maven plugin Java API... cargo-maven2-plugin false tomcat6x Installer installer = new URL("http://somewhere/tomcat-6.0.zip")); installer.iZipURLInstaller(new nstall(); LocalConfiguration configuration = new DefaultConfigurationFactory().createConfiguration("tomcat6x")...) container = new DefaultContainerFactory().createContainer("tomcat6x"....); container.setHome(installer.getHome()); WAR deployable = new WAR("foo.war); deployable.setContext("ROOT"); configuration.addDeployable(deployable);

26 Copyright 2009, Build Lackey Labs (see last slide for licensing terms) Launching Selenium Via Ant Walk through of ant script that launches Selenium server in separate JVM, Waits for server ready, then launches Selenium tests, then waits for shut down

27 Copyright 2009, Build Lackey Labs (see last slide for licensing terms)

28 Copyright 2009, Build Lackey Labs (see last slide for licensing terms)

29 Copyright 2009, Build Lackey Labs (see last slide for licensing terms) Continuous Integration Dedicated box runs regular full builds (including tests) of your software Build triggers whenever any developer checks into SCM Team is notified of any failures

30 Copyright 2009, Build Lackey Labs (see last slide for licensing terms) Continuous Integration Benefits Replaces big (and long) integration cycles with small frequent ones. Same benefits as continous compilation in Eclipse Immediate feedback when an error is introduced. Fewer deltas between when it worked and when it broke => easier resolution of failures Lower ripple through impact when colleagues checks in broken code CI server build fails & team is notified Other developers know it is not safe to pull from source Mail sent out when build goes back to normal

31 Copyright 2009, Build Lackey Labs (see last slide for licensing terms) Workflow After Adopting Continous Integration CI Server: 0- Receive notification of change in SCM repo 1- Check out latest sources 2- Build from scratch 3 Build passes? yes: publish, e.g., deploy.war to QA server no: send out , flash red lights... Developer: 0- Check CI server for current build status broken ? don't update !... otherwise.. 1- check out from SCM 2- code new feature 3- run automated build on your box 4- Tests pass ? no? go back to 2 ! 5- Commit changes SCM Repo Build ok?

32 Copyright 2009, Build Lackey Labs (see last slide for licensing terms) Continuous Integration With Hudson Hudson orchestrates the execution of repeatable jobs periodic builds (e.g., nightly) builds that are triggered by some event (like checkin to source control) Keeps History of Past Builds (Trend Reports) Notifies When Builds Fail Written in Java and runs from a.jar (no install required) Integrates with wide range of SCM systems (SVN, P4, etc.) Supports ant, maven, shell script based builds

33 Copyright 2009, Build Lackey Labs (see last slide for licensing terms) Small Sample of Available Hudson Plug-ins Project Metrics Code Coverage (clover, cobertura, emma) Checkstyle Frameworks Grails (invoke grails tasks as build steps) Gradle Build Wrappers Locks and Latches - allows orchestration of multiple jobs Build Time Out

34 Copyright 2009, Build Lackey Labs (see last slide for licensing terms) Resources Selenium Mailing List Selenium Web Site Ant and Maven CI Tips & Tricks

35 Copyright 2009, Build Lackey Labs (see last slide for licensing terms) Thank You !

36 Copyright 2009, Build Lackey Labs (see last slide for licensing terms) Content Licensing Terms for This Work You may present, distribute, copy, or incorporate into your own work, any and all portions of this presentation as long as such copies, or derivative works are made available without charge. If you would like to redistribute this work on any type of fee-for-use or subscription basis, or if you wish incorporate any or all portions of this work into content which you charge for, please contact info buildlackey.com to discuss licensing terms.


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