HowToDoInJava

Executing Junit Tests in Test Suite

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Often it is desired that one should be able to run only certain testcases whenever a new feature is introduced. This can be achieved using JUnitCore class as discussed in previous post. Alternate way is to make a suite of testcases with Junit provided annotations : @RunWith and @SuiteClasses.

Lets suppose we have two new features in our application named FeatureOne and FeatureTwo. Sample testcases for both features can be as follows:

package com.howtodoinjava.junit;

import junit.framework.Assert;

import org.junit.Test;

public class TestFeatureOne {
	@Test
	public void testFirstFeature()
	{
		Assert.assertTrue(true);
	}
}

and

package com.howtodoinjava.junit;

import junit.framework.Assert;

import org.junit.Test;

public class TestFeatureTwo {
	@Test
	public void testSecondFeature()
	{
		Assert.assertTrue(true);
	}
}

To run above features only, we can write a suite like this.

package com.howtodoinjava.junit.suite;

import org.junit.runner.RunWith;
import org.junit.runners.Suite;
import org.junit.runners.Suite.SuiteClasses;

import com.howtodoinjava.junit.TestFeatureOne;
import com.howtodoinjava.junit.TestFeatureTwo;

@RunWith(Suite.class)
@SuiteClasses({ TestFeatureOne.class, TestFeatureTwo.class })
public class TestFeatureSuite {

}

Happy Learning !!

Feedback, Discussion and Comments

  1. Nice setup, but what if I want to print out which Test Feature failed specifically. Using your solution, I get that TestFeatureSuite Failed and then it says which test case failed, for example @Test testSecondFeature failed, but it does not say that the testSecondFeature test case failed in TestSecondFeature class. What I am interested in is to know that TestSecondFeature class failed.

    Reply

  2. How can we add a condition before running the test cases?
    That is, I have added say two test cases in @SuiteClasses and I want to run one of them only if a certain condition is met?

    Reply

    • I do not find the concept of “run one of them only if” any good. Good written testcases should all be independent units. They should not be dependent on or reply on the result/output of any other testcase in application. Having dependent testcases mostly turnout to be maintenance nightmare in future.

      If you want something to assert before executing a testcase, then use asserts. They are present for this purpose only.

      Reply

      • In Junit 3 we can add the test cases conditionally like below:

        public class MyTestsuite extends TestCase
        {
        public static Test suite()
        {
        TestSuite suite = new TestSuite();
        if(some_condition_true)
        {
        suite.addTest(A.suite);
        }
        suite.addTest(B.suite);
        return suite;
        }
        }

        I wanted the same conditional adding using @SuitClasses

        Reply

        • Using annotations, you can’t do it.

          Reply

          • We can use Filter.shouldRun but that is a complex way of filtering
            I am looking for a simple way.
            Anyway thanks for replying Lokesh

            Reply

            • Thanks for pointing out “Filter.shouldRun()”. It’s new concept for me. I will checkout it soon and share more on it.

              Reply

  3. Hi

    is this mean that the tests will run in this order? (first test is TestFeatureOne and after it TestFeatureTwo)
    my goal is to build a suite that execute the tests in order should this help me?

    thanks

    Reply

  4. Hi Lokesh, nice article but i have a doubt can we execute TestFeatureOne.class, TestFeatureTwo.class in specific order?

    Reply

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