Chapter 8: Unit Testing with JUnit

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Chapter 8Unit Testing with JUnit
Reference Building J2EE Apps with WebSphere
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Objectives

• Understand JUnit
• Write a Test Case
• Run a JUnit Test
• Build a Test Suite
• Run a Test Suite

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What is JUnit?

• Java-based testing framework
• Available as a WSAD plug-in
• JUnit test case
• Runs under TestRunner provided by the framework
• GUI interface
• Text interface

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Write a Test Case

• Reference Page 157 - 161
• General Steps
• Test Case Class extends junit.framework.TestCase
• Constructor with test name string
• Instance variable for each test component
• Optional setup() and tearDown()
• Write a test for each functional unit
• Use TestCase.assertX() methods (e.g.,
  assertEquals())
• Adding junit.jar to build path
• See Advances Tips page

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WSAD TestCase Wizard

• To add junit.jar
• Properties Java Build Path Libraries
• Add External JAR
• To generate stubs
• File New Other
• Java JUnit TestCase
• Browse Test Class
• Next
• Check test class checkbox (e.g., User)
• Finish

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Sample Test Method

• Add the assertions
• public void testName()
• String name "EllWood"
• target.setName(name)
• assertEquals(name, target.getName())

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Run a JUnit Test

• Select the test case class
• Run Run As JUnit Test
• Press JUnit tab
• Runs number of test cases
• Errors unexpected error (e.g.,
  ClassCastException)
• Failures assertion that fails

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Build a Test Suite

• Reference Pages 161 - 163
• To run multiple test cases as a batch
• Can add each test case method or add entire test
  case class
• WSAD TestSuite Wizard
• main() method runs all the tests
• junit.textui.TestRunner.run(suite())
• See Advances Tips page

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WSAD TestSuite Wizard

• To generate test suite
• File New Other
• Java JUnit TestSuite
• Enter Test suite name
• Select All
• Check main() checkbox
• Check Add TestRunner
• Select text ui
• Finish

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Run a Test Suite

• Reference Pages 163 164
• Textual TestRunner
• WSAD Generate Test Suite as text ui
• Select AllTests.java
• Run Run As Java Application
• Results are displayed in the Console output.
• Alternative
• GUI TestRunner