JUnit 4.x – Testing Framework : Assertion Example

• Assertion Example
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AssertionTest.java

package com.javaskool;

import static org.junit.Assert.*;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;

public class AssertionTest {

	@Before
	public void setUp() throws Exception {
	}

	@After
	public void tearDown() throws Exception {
	}

	@Test
	public void test() {
		 //test data
	      String str1 = new String ("hello");
	      String str2 = new String ("hello");
	      String str3 = null;
	      String str4 = "hello";
	      String str5 = "hello";
	      int val1 = 5;
	      int val2 = 6;
	      String[] expectedArray = {"one", "two", "three"};
	      String[] resultArray =  {"one", "two", "three"};

	      //Check that two objects are equal
	      assertEquals(str1, str2);

	      //Check that a condition is true
	      assertTrue (val1 < val2);

	      //Check that a condition is false
	      assertFalse(val1 > val2);

	      //Check that an object isn't null
	      assertNotNull(str1);

	      //Check that an object is null
	      assertNull(str3);

	      //Check if two object references point to the same object
	      assertSame(str4,str5);

	      //Check if two object references not point to the same object
	      assertNotSame(str1,str3);

	      //Check whether two arrays are equal to each other.
	      assertArrayEquals(expectedArray, resultArray);
	}

}

MyAssertRunner.java

package com.javaskool;

import org.junit.runner.JUnitCore;
import org.junit.runner.Result;
import org.junit.runner.notification.Failure;

public class MyAssertRunner {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		  Result result = JUnitCore.runClasses(AssertionTest.class);
	      for (Failure failure : result.getFailures()) {
	         System.out.println(failure.toString());
	      }
	      System.out.println(result.wasSuccessful());

	}

}

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