Why Do You Use JUnit to Test Your Code?

JUnit Questions and Answers

(Continued from previous question...)

Why Do You Use JUnit to Test Your Code?

This is a commonly asked question in a job interview. Your answer should have these points:

• I believe that writing more tests will make me more productive, not less productive.
• I believe that tests should be done as soon as possible at the code unit level.
• I believe that using JUnit makes unit testing easier and faster.

(Continued on next question...)

Other Interview Questions

• What Is JUnit?
• Who Should Use JUnit, Developers or Testers?
• Why Do You Use JUnit to Test Your Code?
• Do You Know the Book "JUnit Recipes: Practical Methods for Programmer Testing"?
• Do You Know the Book "JUnit in Action"?
• Where Do You Download JUnit?
• How Do You Install JUnit?
• What Articles Have You Read about JUnit?
• How To Wirte a Simple JUnit Test Class?
• How To Compile a JUnit Test Class?
• How To Run a JUnit Test Class?
• What CLASSPATH Settings Are Needed to Run JUnit?
• How Do I Run JUnit Tests from Command Window?
• How Do You Uninstall JUnit?
• How To Write a JUnit Test Method?
• Can You Provide a List of Assertion Methods Supported by JUnit 4.4?
• What Happens If a JUnit Test Method Is Declared as "private"?
• What Happens If a JUnit Test Method Is Declared to Return "String"?
• Why Does Poeple Import org.junit.Assert Statically?
• How To Group Multiple Test Classes into a Suite in JUnit 4.4?
• How To Run a "@Suite.SuiteClasses" Class in JUnit 4.4?
• What Is the "@SuiteClasses" Annotation?
• Why Not Just Use a Debugger for Unit Testing?
• Why Not Just Write a main() Method for Unit Testing?
• Why Not Just Use System.out.println() for Unit Testing?
• Under What Conditions Should You Test set() and get() Methods?
• Under What Conditions Should You Not Test Get() and Set() Methods?
• Do You Need to Write a Test Class for Every Class That Need to Be Tested?
• What Is JUnit TestCase?
• What Is JUnit TestSuite?
• How Many Test Runners Are Supported in JUnit 3.8?
• What Are JUnit 3.8 Naming Conventions?
• How To Write a Single Class to Define Multiple Tests and Run Them?
• How to Run Your JUnit 4.4 Tests with a JUnit 3.8 Runner?
• Can You Write a Simple Class for JUnit Testing in 1 Minute?
• Can You Write a JUnit Test Case Class in 2 Minutes?
• Can You Write a JUnit Test Suite in 2 Minutes?
• Where Should You Place Test Classes?
• How Do You Test a "protected" Method?
• How Do You Test a "private" Method?
• Can You Write a JUnit Test Case Class in 10 Minutes?
• Can You Explain a Sample JUnit Test Case Class?
• Do You Need to Write a main() Method in a JUnit Test Case Class?
• How To Group Test Cases Class using JUnit TestSuite?
• Can You Write a JUnit 4.4 Test Class Template in 2 Minutes?
• Can You Explain the Life Cycle of a JUnit 4.4 Test Class?
• How To Write Setup Code to Run Once for All Tests in a Test Class?
• Can You Write a JUnit 3.8 Test Class Template in 2 Minutes?
• Can You Explain the Life Cycle of a JUnit 3.8 Test Case Class?
• What Is a JUnit Test Fixture?
• Can You Create Tests without Using a Common Test Fixture?
• How Create a Test Fixture to Be Shared by All Tests in a Test Class?
• How To Destroy a JUnit Test Fixture?
• When Do You Need to Write an @After Method?
• When Should Unit Tests Should Be Written In Development Cycle?
• How Do You Launch a Debugger When a Test Fails?
• How Do You Run JUnit Using Ant?
• How Do You Run All Test Classes without Managing a TestSuite Explicitly?
• How Do You Test an Expected Exception with JUnit?
• How To Use the "expected" Parameter Supported by the "@Test" Annotation?
• How Do You Test an Unexpected Exception with JUnit?
• What Happens If a Test Method Throws an Exception?
• Why Do I See "Unknown Source" in the Stack Trace of a Failed Test?
• How Do You Test a Method That Doesn't Return Anything?
• When Objects Are Garbage Collected After a Test Is Executed?
• What Is Java "assert" Statement?
• How To Test Programs Thats Use Java "assert" Statements?
• Should You Run JUnit Tests with Java Assertion Disabled?
• What Happens If You Run JUnit Tests with Java Assertion Enabled?
• Why Does JUnit Only Report the First Failed Assertion in a Single Test?
• Do You Have To Write a Test for Everything?
• How Often Should You Run Your JUnit Tests?
• What Do You Do When a Defect Is Reported?
• How simple is 'too simple to break'?
• How To Verify the JUnit Plugin in Eclipse?
• How To Create Test Class in Eclipse?
• How to Run a JUnit Test Case in Eclipse?
• Can You Describe Steps of Creating Test Case Classes in Eclipse?
• How to creating a Test Suite using JUnit in Eclipse?
• How Do You Use Ant to Create HTML Test Reports?
• How Do You Test Classes That Must Be Run in a J2EE Container?
• Can You Explain the Exception: "No runnable methods"?