unit test by 32 comments

JUnit – Basic annotation examples

Here’re some basic JUnit annotations you should understand:

  1. @BeforeClass – Run once before any of the test methods in the class, public static void
  2. @AfterClass – Run once after all the tests in the class have been run, public static void
  3. @Before – Run before @Test, public void
  4. @After – Run after @Test, public void
  5. @Test – This is the test method to run, public void

P.S Tested with JUnit 4.12

BasicAnnotationTest.java

package com.mkyong;

import org.junit.*;

public class BasicAnnotationTest {

    // Run once, e.g. Database connection, connection pool
    @BeforeClass
    public static void runOnceBeforeClass() {
        System.out.println("@BeforeClass - runOnceBeforeClass");
    }

    // Run once, e.g close connection, cleanup
    @AfterClass
    public static void runOnceAfterClass() {
        System.out.println("@AfterClass - runOnceAfterClass");
    }

    // Should rename to @BeforeTestMethod
    // e.g. Creating an similar object and share for all @Test
    @Before
    public void runBeforeTestMethod() {
        System.out.println("@Before - runBeforeTestMethod");
    }

    // Should rename to @AfterTestMethod
    @After
    public void runAfterTestMethod() {
        System.out.println("@After - runAfterTestMethod");
    }

    @Test
    public void test_method_1() {
        System.out.println("@Test - test_method_1");
    }

    @Test
    public void test_method_2() {
        System.out.println("@Test - test_method_2");
    }

}

Output


@BeforeClass - runOnceBeforeClass

@Before - runBeforeTestMethod
@Test - test_method_1
@After - runAfterTestMethod

@Before - runBeforeTestMethod
@Test - test_method_2
@After - runAfterTestMethod

@AfterClass - runOnceAfterClass

References

  1. JUnit @Before
  2. JUnit @BeforeClass

32 comments on “JUnit – Basic annotation examples”

  1. wouldn’t it run more effectively with some asserts or are they optional??

    Reply

  4. Thanks a lot for your post^^. These days, I am studying about Junit!

    Reply

  5. not sure what it does but the output look meaningless to me
    System.out.println(“@Test – testOneItemCollection”);
    this just print out and shows what ?

    Reply

    1. Just a testing message to show the order of the execution (when the declared annotation will be fired)

      Reply

  8. Thank you for these posts about Java.
    Such a small examples are such a huge help for people, who haven’t deal with all this stuff.

    Reply 
  10.  package Tests;

import static org.junit.Assert.*;

import java.io.File;

import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter.DEFAULT;

import org.apache.log4j.Logger;
import org.junit.After;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;

import source.Record;
import tools.ClassManager;

/**
 * @author matifi
 *
 */
public class RecordTest {
	/**
	 * Instance du logger log4J
	 */
   private static final Logger logger = Logger.getLogger(RecordTest.class);
   private Record record,record1; 
	/**
	 * @throws java.lang.Exception
	 */
	@BeforeClass
	public static void setUpBeforeClass() throws Exception {
		logger.info("---------test de la classe Record : Début-----------");
	}

	/**
	 * @throws java.lang.Exception
	 */
	@AfterClass
	public static void tearDownAfterClass() throws Exception {
		logger.info("---------test de la classe Record : Fin-----------");
	}

	/**
	 * @throws java.lang.Exception
	 */
	@Before
	public void setUp() throws Exception {
		record = new Record("RIEN","test.doc","C:\\Documents and Settings\\test.doc","2012-10-11-01-25-38","2011-10-11-01-25-38",128,130,"F");	    
	}

	/**
	 * @throws java.lang.Exception
	 */
	@After
	public void tearDown() throws Exception {
		record=null;
	}

	@Test	
	public void record() {	
		assertNotNull(record);	
	}
	
	@Test	
	public void record1() {	
		record1=new Record("C:\\Documents and Settings\\test.doc");
		assertNotNull(record1);	
		record1=null;
	}
	
	@Test	
	public void getStatut() {
		assertEquals("RIEN", record.getStatut());		
	}
	
	@Test
	public void setStatut() {
	record.setStatut("SUPP");
	assertEquals("SUPP", record.getStatut());
	}
	
	@Test	
	public void getName() {
		assertEquals("test.doc", record.getName());		
	}
	
	@Test
	public void setName() {
	record.setName("test1.doc");
	assertEquals("test1.doc", record.getName());
	}
	
	@Test	
	public void getChemin() {
		assertEquals("C:\\Documents and Settings\\test.doc", record.getChemin());		
	}
	
	@Test
	public void setChemin() {
	record.setChemin("C:\\Documents and Settings\\test1.doc");
	assertEquals("C:\\Documents and Settings\\test1.doc", record.getChemin());
	}
	
	@Test	
	public void getDateModification() {
		assertEquals("2012-10-11-01-25-38", record.getDateModification());		
	}
	
	@Test
	public void setDateModification() {
	record.setDateModification("2012-10-11-01-00-00");
	assertEquals("2012-10-11-01-00-00", record.getDateModification());
	}
	
	@Test	
	public void getAncienneDateModification() {
		assertEquals("2011-10-11-01-25-38", record.getAncienneDateModification());		
	}
	
	@Test
	public void setAncienneDateModification() {
	record.setAncienneDateModification("2010-11-11-01-25-38");
	assertEquals("2010-11-11-01-25-38", record.getAncienneDateModification());
	}
	
	@Test	
	public void getTaille() {
		assertEquals(128, record.getTaille());		
	}
	
	@Test
	public void setTaille() {
	record.setTaille(150);
	assertEquals(150, record.getTaille());
	}
	
	@Test	
	public void getAncienneTaille() {
		assertEquals(130, record.getAncienneTaille());		
	}
	
	@Test
	public void setAncienneTaille() {
	record.setAncienneTaille(110);
	assertEquals(110, record.getAncienneTaille());
	}
	
	@Test	
	public void getType () {
		assertEquals("F", record.getType());		
	}
	
	@Test
	public void setAType() {
	record.setType("R");
	assertEquals("R", record.getType());
	}
	
	@Test
	public void ToString() {
	assertEquals("RIEN;test.doc;C:"+File.separator+"Documents and Settings"+File.separator+"test.doc;2012-10-11-01-25-38;2011-10-11-01-25-38;128;130;F", record.ToString());
	}
}
    Reply

    1. Shrikant, thanks a lot buddy, that saved my A**,, none of the internet explanation was absolute. This one was outstanding.

      Thanks a ton for identifying it.

      Regards,
      Ronald

      Reply

  13. The @BeforeClass is not a one time setup. It runs once for every test class.

    Do you know how to implement one time setup and teardown for multiple classes?

    Reply

    1. I know it’s old post but I just read this now. You could use a test suite and do setup on the first class(especially on it’s @BeforeClass) and teardown on the last class(especially on @AfterClass) 🙂

      Reply

  16. thx u so much … gan .. i want to learned any tutorial in here …
    Good Bless For U gan ..

    Reply

  17. good job man.
    excellent work and information for java developers.
    thanks

    Reply

  19. This web site is helping me a lot in daily live works
    Thanks a lot for the stuff

    it will be useful if you post some examples for the AJAX

    Reply

  20. Very good one for a beginner to go with.Thanks a lot for the stuff.

    Reply

  22. Excellent web site…
    thinks for efforts and sharing knowledge…

    Java For Ever…

    Reply

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