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Unit testing with java
This document discusses unit testing in Java. It introduces unit testing and the JUnit framework. It explains how to set up a testing environment in Eclipse and describes best practices for writing unit tests. These include avoiding conditional logic and loops, using descriptive method and assertion names, and separating tests by type. Advantages of unit testing include speed, isolation, safety when refactoring, and serving as documentation. Disadvantages include potential high maintenance costs from unnecessary tests. Similar testing frameworks exist for other languages like C#, C++, and Python.
Unit testing with java
- 1. Unit Testing withJAVA Dinuka Malalanayake 13-12-2011 “Any Unit Test is better than none”
- 2. Objectives Unit testing? About JUnit How to do the Unit testing with JAVA Best Practices Advantages Disadvantages Similar Products “Any Unit Test is better than none”
- 3. Unit testing? A unit test is a procedure used to verify that a particular module of source code is working properly Mouse, Keyboard, Monitor Company wants to achieve three related goals − Faster time-to-market “Any Unit Test is better than none” − Higher quality − More flexibility
- 4. About Junit Junit is an open source unit testing framework for JAVA. Junit has plugin for Eclipse, NetBeans.....etc. It serves the same purpose as NUnit does in the DotNet Technologies, and is one of many in the xUnit family “Any Unit Test is better than none”
- 5. Making the Environment Download the eclipse Configure JUnit or Testng framework
- 10. How to dothe Unit testing with JAVA? Pre Requirement − Source code − Test Framework − Test Methods “Any Unit Test is better than none”
- 11. Test Fixture inJunit import org.junit.*; @Test @Before @After @BeforeClass @AfterClass @Ignore….etc. “Any Unit Test is better than none”
- 12. Test Fixture inTestng import org.testng.* @Test @BeforeMethod @AfterMethod @BeforeClass @AfterClass @Test (enabled=false)….etc. “Any Unit Test is better than none”
- 13. Way of workingin Junit @BeforeClass − @Before @Test − @After − @Before @Test − @After @AfterClass
- 14. Way of workingin Testng @BeforeClass − @BeforeMethod @Test − @AfterMethod − @BeforeMethod @Test − @AfterMethod @AfterClass
- 15. Assertion import junit.framework.Assert; assertEquals assertFalse assertNotNull assertNotSame assertNull fail…etc. “Any Unit Test is better than none”
- 16. Steps for Unittesting Create JAVA Project by using the Eclipse Write the simple class public class Account { } Define the attributes and methods Create an Unit testing class Write down unit test code according to the specification “Any Unit Test is better than none”
- 17. Class Account Type Name float minimumBalance float balance Return type Name void setMinimumBalanace(float minimumBalanace) float getMinimumBalanace() float deposit(float amount) float getBalance() void deposit(float amount) void withdraw(float amount) void calculateInterest(float interestRate) void reSetAccount()
- 20. Best Practices No conditional logic – Switch, if No loops Use appropriate method names Informative assertion message Separation per type “Any Unit Test is better than none”
- 21. Advantages Fast Test Isolation Environment Isolation – Use Mock Objects Unit testing gives you a safety net when programmers re-factor or add functionality Unit tests can be used as documentation for other programmers Development process becomes more flexible “Any Unit Test is better than none”
- 22. Disadvantages Unnecessary Unit Tests can lead to considerably high maintenance cost to your overall project “Any Unit Test is better than none”
- 23. Similar Products Programming Language Unit Testing Tool C# NUnit Java – J2ME JMUnit C CUnit C++ CppUnit php PHPUnit Python PyUnit / py.test “Any Unit Test is better than none”
- 24. Q&A “Any Unit Testis better than none”
- 25. THANK YOU “Any UnitTest is better than none”