tutorials by 28 comments

JUnit Tutorial

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JUnit, a popular unit test framework in Java. In this tutorials, all examples are tested with JUnit 4.12

1. JUnit 4.x Examples

References

  1. JUnit Official site
  2. Wikipedia – JUnit

28 comments on “JUnit Tutorial”

  1. sir, i installed junit 5 it shows an error. eclipse also shows an error . Java jre and java se is not installing only document is there. one website shows Java SE. Which software will work in Windows. Linux and macintosh are not installing in Windows. is there any software with no errors.

    Reply

  2. Please anyone give me the suggestion as soon as possible bcaz I am stucking in that long time

    Reply

  3. I want to ensure whether my method successfully executed or not in Junit. Is
    there any way to test?

    Reply

  4. Hi yong,
    Can u please provide me the guide for deploying enterprise applications in ibm websphere application server 8.5.
    And how to create profile,http port and etc

    Reply

  6. Hi, can you please explain all the methods like as setUp() & tearDown(),
    means what are the significance of these method and how to be use using spring?

    Reply

    1. It is showing database connection error “Error establishing a database connection”

      Reply

  8. can you tell me how to embed multiple test case in one file
    i means can we write two test() function in one file to test two different function.
    thanks

    Reply

  9. can you tell me how to embed multi test case in one file
    i means can we write two test() function in one file to test two different function.
    thanks

    Reply

  11. i need to display message in jsp from servlets.but im getting null value after loading jsp page..can i please get the solution for this

    Reply

  12. This tutorial is really nice. But if you want to overcome some of the major limitations of junit 3 and junit 4 have a look at the below mentioned link which tells how to use effectively use junit for functional testing.
    http://apitestingwithjunit.blogspot.in/

    Reply

  15. hi Monk, here is the here which i am getting while UNIT Test for “https” url.
    Plz help me as soon as possible.

    SSLUnsubscribes exception…..

    Reply

  18. hi can anybody help me on an issue with XMLParameterizedRunner in JUnit4.8
    i am getting the following error

    java.lang.NoSuchMethodError: org.junit.internal.runners.MethodValidator.(Ljava/lang/Class;)V
    at org.junit.internal.runners.TestClassRunner.(TestClassRunner.java:26)
    at org.junitext.runners.XMLParameterizedRunner.(Unknown Source)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
    at org.junit.internal.builders.AnnotatedBuilder.buildRunner(AnnotatedBuilder.java:31)
    at org.junit.internal.builders.AnnotatedBuilder.runnerForClass(AnnotatedBuilder.java:24)
    at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:57)
    at org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass(AllDefaultPossibilitiesBuilder.java:29)
    at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:57)
    at org.junit.internal.requests.ClassRequest.getRunner(ClassRequest.java:24)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.(JUnit4TestReference.java:32)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestClassReference.(JUnit4TestClassReference.java:25)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createTest(JUnit4TestLoader.java:41)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.loadTests(JUnit4TestLoader.java:31)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:452)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

    and the java code is

     package concurrent;
import java.net.URL;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junitext.XMLParameters;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.remote.DesiredCapabilities;
import org.openqa.selenium.remote.RemoteWebDriver;
import org.junitext.runners.XMLParameterizedRunner;
@RunWith(XMLParameterizedRunner.class)
public class One_inTwo {
  public String browser1;
  @XMLParameters("/concurrent/One_inTwo1.xml")
  public One_inTwo(String browser1) {
     this.browser1=browser1;    
  }
  @Test 
  public void test() throws Exception {
    WebDriver driver;
    URL server = new URL("http://localhost:8081/wd/hub");
    DesiredCapabilities capabilities = null;
		driver = new RemoteWebDriver(server, Common.getGridsettings(browser1, capabilities));
		driver.get("http://google.com");
		Thread.sleep(3000);
		WebElement search_editbox   =   driver.findElement(By.name("q"));
		WebElement search_button    =   driver.findElement(By.name("btnG"));
		search_editbox.clear();
		search_editbox.sendKeys("first");
		search_button.click();
	driver.quit();

  }
}

    and the xml code is 

    <?xml version="1.0" encoding="UTF-8" ?>
<tests>
  <test>
     <string id="browser1" value="firefox" />
  </test>
  <test>
     <string id="browser1" value="IE" />
  </test>
</tests>
    Reply

  19. how to make the immutable class ? give me example?

    Reply

    1. Make class Final.

      make data and methods too final and static.

      Reply

      1. yes… use the final keyword before class name…

        Reply

  20. Hi Yong, Could you provide some pointers for adding methods(not class level) to a test suite in JUNIT4..?

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  21. how can write test cases for the private method using junit test3.2

    Reply

    2. It is possible to test private methods in your class by different ways. An alternative solution could be to use/implement Java Reflection API.Something like this :

      Method theMethod = targetClass.getDeclaredMethod(methodName, argClasses);
      theMethod.setAccessible(true);
      return theMethod.invoke(targetObject, argObjects);

      Or take a look at this http://code.google.com/p/powermock/wiki/BypassEncapsulation

      good luck:)

      Reply

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