1 / 24

Scripting Approaches For Java Application Test Automation

Scripting Approaches For Java Application Test Automation. Marty Kube Beaver Creek Consulting Corp NoVa Test Automation Interest Group 2009-04-08. http://www.novataig.net/. http://beavercreekconsulting.com/. Scripting and Test Automation. Scripting is the way to go for test automation

gracie
Download Presentation

Scripting Approaches For Java Application Test Automation

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Scripting Approaches For Java Application Test Automation Marty Kube Beaver Creek Consulting Corp NoVa Test Automation Interest Group 2009-04-08 http://www.novataig.net/ http://beavercreekconsulting.com/

  2. Scripting and Test Automation • Scripting is the way to go for test automation • “High Level” languages - More functionality with less code • How scripting interacts with the application • External interfaces • Win runner • JMeter • Expose Internals • JavaScript in the Browser • SQL

  3. Survey a Few DSL Approaches • Small example application • Use scripting and Domain Specific Language to drive application • Groovy • JavaScript • JavaCC • Hands on with code examples

  4. Contrasting the DSL approaches • Focus on Strategy – Using Java as an example – similar tactics should apply for other environments. • Three types of resources • Expertise for set-up, Integration effort, Expertise for test authoring • Trade offs: • General Trade offs • Less front end setup • More complex test authoring • More front end setup • Less complex test authoring

  5. Scripting Languages • Type-less or easy to use type system • High Level – more productive and less defects • Interpreted • Interactive shell for rapid exploration or development • Text processing - AWK, SED • General Purpose - Perl, Python, TCL, Emacs LISP http://en.wikipedia.org/wiki/Scripting

  6. Domain Specific Languages (DSL) • Smaller language dedicated to a particular situation • SQL • Second Life/MORPHS • Spotted in the wild • Less general • Lack low level functionality • More expressive in the particular domain • Really blurry line between scripting language and DSL http://en.wikipedia.org/wiki/Domain_specific_language

  7. Example Application

  8. The Java Code package com.beavercreekconsulting.novataig; public class TestLedger { public static void main(String[] args) { Ledger subLedger = new Ledger(); // Open the period subLedger.setBalance(Account.CHECKING, 1000.00); subLedger.setBalance(Account.TRAVEL_AND_ENTERTAINMENT, 200.00); subLedger.setBalance(Account.SLUSH_FUND, -500.00); // Post activity JournalEntry [] activity = { new JournalEntry(Account.CHECKING, Ind.CREDIT, 100.00), new JournalEntry(Account.TRAVEL_AND_ENTERTAINMENT, Ind.DEBIT, 100.00), new JournalEntry(Account.CHECKING, Ind.CREDIT, 2000.00), new JournalEntry(Account.SLUSH_FUND, Ind.DEBIT, 2000.00)}; for(inti = 0; i < activity.length; i++) subLedger.post(activity[i]); // Check ending balances if (subLedger.getBalance(Account.CHECKING) != -1100.00) throw new TestFailure(); if (subLedger.getBalance(Account.TRAVEL_AND_ENTERTAINMENT) != 300.00) throw new TestFailure(); if (subLedger.getBalance(Account.SLUSH_FUND) != 1500.00) throw new TestFailure(); System.out.println("Happy Day!"); } }

  9. The Groovy Code package com.beavercreekconsulting.novataig; public class TestLedger { public static void main(String[] args) { Ledger subLedger = new Ledger(); // Open the period subLedger.setBalance(Account.CHECKING, 1000.00); subLedger.setBalance(Account.TRAVEL_AND_ENTERTAINMENT, 200.00); subLedger.setBalance(Account.SLUSH_FUND, -500.00); // Post activity JournalEntry [] activity = [ new JournalEntry(Account.CHECKING, Ind.CREDIT, 100.00), new JournalEntry(Account.TRAVEL_AND_ENTERTAINMENT, Ind.DEBIT, 100.00), new JournalEntry(Account.CHECKING, Ind.CREDIT, 2000.00), new JournalEntry(Account.SLUSH_FUND, Ind.DEBIT, 2000.00)]; for(inti = 0; i < activity.length; i++) subLedger.post(activity[i]); // Check ending balances if (subLedger.getBalance(Account.CHECKING) != -1100.00) throw new TestFailure(); if (subLedger.getBalance(Account.TRAVEL_AND_ENTERTAINMENT) != 300.00) throw new TestFailure(); if (subLedger.getBalance(Account.SLUSH_FUND) != 1500.00) throw new TestFailure(); System.out.println("Happy Day!"); } }

  10. Groovy Up Close • Super set of Java • Plus • Dynamic typing • Enhanced API Java Classes • String interpolation • def x = “Bob”; print “Hello ${x}”; • Closures • square = {it * it} • [1..9].collect(square); • XML builders and groovy SQL • Script MS Office with COM Bridge (Scriptom) http://groovy.codehaus.org/Tutorial+2+-+Code+as+data,+or+closures

  11. Groovy Architecture – What’s in the JVM >groovy.bat -classpath bin TestLedger.groovy

  12. Really Groovy Code import com.beavercreekconsulting.novataig.*; def subLedger = new Ledger(); [ [Account.CHECKING, 1000.00], [Account.TRAVEL_AND_ENTERTAINMENT, 200.00], [Account.SLUSH_FUND, -500.00] ].each() {subLedger.setBalance(it[0], it[1]);} [ new JournalEntry(Account.CHECKING, Ind.CREDIT, 100.00), new JournalEntry(Account.TRAVEL_AND_ENTERTAINMENT, Ind.DEBIT, 100.00), new JournalEntry(Account.CHECKING, Ind.CREDIT, 2000.00), new JournalEntry(Account.SLUSH_FUND, Ind.DEBIT, 2000.00) ].each() {je -> subLedger.post(je);} [ [Account.CHECKING, -1100.00], [Account.TRAVEL_AND_ENTERTAINMENT, 300.00], [Account.SLUSH_FUND, 1500.00] ].each() { expected -> if(subLedger.getBalance(expected[0]) != expected[1]) throw new TestFailure(); } println "Happy Day!"

  13. JavaScript • JavaScript is a small language – ECMA Script • Easy to integrate • Easy to find JavaScript Fan boys • Rhino is a JavaScript interpreter written in Java • Other JavaScript Engines, Mozilla, V8 http://www.mozilla.org/rhino/ http://en.wikipedia.org/wiki/Javascript

  14. Rhino Architecture >java -classpath lib\js.jar;bin org.mozilla.javascript.tools.shell.Main -f TestLedger.js

  15. The JavaScript Code importPackage(com.beavercreekconsulting.novataig) function assertEquals(a, b) { if(a != b) throw new TestFailure() } varsubLedger = new Ledger() subLedger.setBalance(Account.CHECKING, 1000.00) subLedger.setBalance(Account.TRAVEL_AND_ENTERTAINMENT, 200.00) subLedger.setBalance(Account.SLUSH_FUND, -500.00) activity = [ new JournalEntry(Account.CHECKING, Ind.CREDIT, 100.00), new JournalEntry(Account.TRAVEL_AND_ENTERTAINMENT, Ind.DEBIT, 100.00), new JournalEntry(Account.CHECKING, Ind.CREDIT, 2000.00), new JournalEntry(Account.SLUSH_FUND, Ind.DEBIT, 2000.00)] for(i = 0; i < activity.length; i++) subLedger.post(activity[i]) assertEquals(subLedger.getBalance(Account.CHECKING), -1100.00) assertEquals(subLedger.getBalance(Account.TRAVEL_AND_ENTERTAINMENT), 300.00) assertEquals(subLedger.getBalance(Account.SLUSH_FUND), 1500.00) print("Happy Day!")

  16. JavaCC – Create a DSL # # Test case: #16,678 # Author: Marty # Checking set 1000.00; travel_and_entertainment set 200.00; slush_fund set -500.00; checking post credit 100.00; travel_and_entertainment post debit 100.00; checking post credit 2000.00; slush_fund post debit 2000.00; Checking verify -1100.00; travel_and_entertainment verify 300.00; slush_fund verify 1500.00; print happy day!; https://javacc.dev.java.net/

  17. JavaCC

  18. JavaCC Lexer SKIP: {" "} TOKEN: { < CHECKING: "checking" >} TOKEN: { < OP_SET : "set" > } TOKEN: { < NUMBER : (["0"-"9"])+ > } TOKEN: { < EOL: ";" >} <CHECKING> <OP_SET> <NUMBER> <EOL> Checking set 1000.00;

  19. JavaCC Parser Accepts the token stream: <CHECKING> <OP_SET> <NUMBER> <EOL> <TRAVEL> <OP_POST> <NUMBER> <EOL> <EOF> And enforces order – the grammar: (<CHECKING> <OP_SET> <NUMBER> <EOL> )* <EOF>

  20. Recognize Statements – Invoke Application {( <CHECKING> <OP_SET> t=<NUMBER> { amount = new Double(t.image); } <EOL> {System.out.println("Posting: " + amount); } {ledger.setBalance(Account.CHECKING, amount); })* <EOF> {System.out.println("Happy Day");} }

  21. Running • >javaccTestLedger.jj • >javac -d bin -cp "../bin" gen\*.java • >java -classpath "bin;../bin" LedgerLanguage TestCase.txt

  22. Comparison - LOE

  23. Honorable mentions • SWIG • Antlr • JavaScript – Mozilla – v8 • Most scripting languages cross language interfaces, Perl, Python, etc. • Bean Shell • Jython

  24. Wrap up • JVM is a target for many scripting languages • Using a JVM based language make integration easy • DSL can make it easy to author test cases • Setup can be a hurdle

More Related