Download Testing Web Applications with HtmlUnit and Dbunit

Testing Web Applications
with HtmlUnit and Dbunit
Michael J. Bresnahan
Fruition Consulting Inc.
Agenda
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About Me, Mike Bresnahan
Brief Overview of HtmlUnit and Dbunit
Benefits of Automated Testing
About HtmlUnit
About Dbunit
Designing Tests
Questions and Answers
About Me, Mike Bresnahan
• 9 years of software development experience
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Enterprise applications
C, C++, Java
Relational Databases
Client/Server
Web
1 year of HtmlUnit and Dbunit experience
A Brief Overview of
HtmlUnit and Dbunit
• Both are Java APIs for automated functional
testing.
– HtmlUnit is a Java API for automated testing of web
applications.
– Dbunit is a JUnit extension for automated testing of
database applications.
• Both are Java API’s, but can be used to test
applications written in any language.
• Both are Open Source.
Benefits of Automated
Testing
• More efficient than manual testing.
• Less error prone than manual testing.
• Enables collective code ownership.
• Enables refactoring.
• Enables frequent integration.
About HtmlUnit
HtmlUnit
Test Client
Web
Server
Application
Server
HtmlUnit Features
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HTTP 1.0 and 1.1
HTTPS
HTML 4
Cookies
Proxy Servers
JavaScript
Simulated Mouse Clicks
DOM Search and Navigation
Simple HtmlUnit Test
1 public class SimpleHtmlUnitTest extends junit.framework.TestCase {
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public void testHomePage() throws Exception {
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WebClient webClient = new WebClient();
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java.net.URL url = new
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java.net.URL("http://htmlunit.sourceforge.net");
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HtmlPage page = (HtmlPage) webClient.getPage(url);
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assertEquals("Welcome to HtmlUnit", page.getTitleText());
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}
12 }
HTML Form Test
1 public class FormTest extends junit.framework.TestCase {
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public void testForm() throws Exception {
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WebClient webClient = new WebClient();
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java.net.URL url =
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new java.net.URL("http://htmlunit.sourceforge.net");
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HtmlPage page = (HtmlPage)webClient.getPage(url);
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HtmlForm form = page.getFormByName("myform");
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HtmlTextInput textInput =
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(HtmlTextInput)form.getInputByName("myfield");
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textInput.setValueAttribute("zappa zoo yeah!");
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form.submit();
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}
19 }
Button Click Test
1 public class ButtonClickTest extends junit.framework.TestCase {
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public void testButtonClick() throws Exception {
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WebClient webClient = new WebClient();
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java.net.URL url =
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new java.net.URL("http://htmlunit.sourceforge.net");
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HtmlPage page = (HtmlPage) webClient.getPage(url);
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HtmlForm form = page.getFormByName("myform");
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HtmlButtonInput buttonInput =
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(HtmlButtonInput) form.getInputByName("mybutton");
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HtmlPage newPage = (HtmlPage)buttonInput.click();
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}
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About Dbunit
XML
Database
Dbunit Features
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DTD database schemas
Import/export XML datasets
Manipulate datasets
Compare datasets
Ant task
Abstract Database Test
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extends org.dbunit.DatabaseTestCase {
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protected IDatabaseConnection getConnection() throws Exception {
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java.sql.Connection connection = java.sql.DriverManager.
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getConnection("jdbc:oracle:thin:@localhost:1521:foo");
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return new DatabaseConnection(connection);
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}
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protected DatabaseOperation getSetUpOperation() throws Exception{
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return DatabaseOperation.CLEAN_INSERT;
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}
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protected IDataSet getDataSet() throws Exception {
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return new FlatXmlDataSet(new java.io.File("dataset.xml"));
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}
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Dataset.xml
<!DOCTYPE dataset SYSTEM "dataset.dtd">
<dataset>
<STUDY_SESSIONS ID="1" AIMR_AREAS_ID="1" STUDY_SESSION_CODE="1“/>
<STUDY_SESSIONS ID="2" AIMR_AREAS_ID="1" STUDY_SESSION_CODE="2“/>
<READINGS ID="1" STUDY_SESSIONS_ID="1" READING_CODE="1"/>
<READINGS ID="2" STUDY_SESSIONS_ID="2" READING_CODE="2"/>
</dataset>
Simple Dbunit Test
1 public void test() throws Exception {
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// exercise the application
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IDataSet expectedDataSet =
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new FlatXmlDataSet(new java.io.File("expected.xml"));
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ITable expectedTable = expectedDataSet.getTable(“readings");
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ITable databaseTable = getConnection().
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createQueryTable(“readings","select * from readings");
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Assertion.assertEquals(expectedTable, databaseTable);
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Designing Tests
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Keep tests independent
Keep tests small and single purpose
Pool database connections
Load common reference data once
Engineer the test suite
Decouple tests from the application as
much as possible
• Use Dbunit to hold the expected data of
web pages
Further Reading
• http://htmlunit.sf.net
• http://dbunit.sf.net
• http://junit.org