Hi,



I tried to generate parameteric tests with JUnit 4.6. I don't know if this is an

expected behavior.



Test Code





@RunWith(Parameterized.class)

public class JUnit4Test {



	 private String name;



	 @BeforeClass

	 public static void setUpOnceBeforeClass() throws Exception {

		 System.out.println("Before Class");

	 }



	 @Before

	 public void setUp() throws Exception {

		 System.out.println("Before Method");

	 }



	 @After

	 public void tearDown() throws Exception {

		 System.out.println("After Method");

	 }



	 @AfterClass

	 public static void tearDownOnceAfterClass() throws Exception {

		 System.out.println("After Class");

	 }



	 @Test()

	 public void testOne() throws Exception {

		 System.out.println("One");

	 }



	 @Test

	 public void testTwo() throws Exception {

		 System.out.println("Two");

	 }



	 @Test

	 public void testThree() throws Exception {

		 System.out.println(this.name);

	 }



	 public JUnit4Test(String name) {

		 this.name = name;

	 }



	 @Parameters

	 public static Collection<Object[]> getNames() {

		 return Arrays.asList(new Object[][] {

				 {"Kartik"}, {"Rakesh"}, {"Ed"}

		 });

	 }

}



My output



Before Class

Before Method

One

After Method

Before Method

Two

After Method





Before Method

Kartik

After Method

Before Method

One

After Method

Before Method

Two

After Method

Before Method

Rakesh

After Method

Before Method

One

After Method

Before Method

Two

After Method

Before Method

Ed

After Method

After Class



It runs the unit tests three times. The testOne, testTwo outputs remain

unchanged, the testThree output changes with the depending upon the name.



Is this the expected behavior? I expected that testThree would run three times

each with a different parameter. Does anyone know if there is a reason for this

implementation.

I've modified the program by adding a counting variable that is scoped

to the class.  You can play arround with why this is important on your

own time... but anyway.



I got test's three's output changing correctly.  Don't know what you

were expecting.  If you would explain that we might be able to help

with this question more.



Here is my output...



Before Class

.Before Method

One

After Method

.Before Method

Two

After Method

.Before Method

count:0 Kartik

After Method

.Before Method

One

After Method

.Before Method

Two

After Method

.Before Method

count:1 Rakesh

After Method

.Before Method

One

After Method

.Before Method

Two

After Method

.Before Method

count:2 Ed

After Method

After Class



My testThree is

        @Test

        public void testThree() throws Exception {

                System.out.println("count:" + count + " " + this.name);

	        count++;

        }



I've added a private static int count to the class initialized to 0.

As you can see.



Hope I helped...



Big Mike



On Fri, Jul 3, 2009 at 5:27 PM,

kartik_krishnanand<kartik_krishnanand@...> wrote:

> Hi,

>

> I tried to generate parameteric tests with JUnit 4.6. I don't know if this is

an expected behavior.

>

> Test Code

>

>

> @RunWith(Parameterized.class)

> public class JUnit4Test {

>

>        private String name;

>

>        @BeforeClass

>        public static void setUpOnceBeforeClass() throws Exception {

>                System.out.println("Before Class");

>        }

>

>        @Before

>        public void setUp() throws Exception {

>                System.out.println("Before Method");

>        }

>

>        @After

>        public void tearDown() throws Exception {

>                System.out.println("After Method");

>        }

>

>        @AfterClass

>        public static void tearDownOnceAfterClass() throws Exception {

>                System.out.println("After Class");

>        }

>

>        @Test()

>        public void testOne() throws Exception {

>                System.out.println("One");

>        }

>

>        @Test

>        public void testTwo() throws Exception {

>                System.out.println("Two");

>        }

>

>        @Test

>        public void testThree() throws Exception {

>                System.out.println(this.name);

>        }

>

>        public JUnit4Test(String name) {

>                this.name = name;

>        }

>

>        @Parameters

>        public static Collection<Object[]> getNames() {

>                return Arrays.asList(new Object[][] {

>                                {"Kartik"}, {"Rakesh"}, {"Ed"}

>                });

>        }

> }

>

> My output

>

> Before Class

> Before Method

> One

> After Method

> Before Method

> Two

> After Method

>

>

> Before Method

> Kartik

> After Method

> Before Method

> One

> After Method

> Before Method

> Two

> After Method

> Before Method

> Rakesh

> After Method

> Before Method

> One

> After Method

> Before Method

> Two

> After Method

> Before Method

> Ed

> After Method

> After Class

>

> It runs the unit tests three times. The testOne, testTwo outputs remain

unchanged, the testThree output changes with the depending upon the name.

>

> Is this the expected behavior? I expected that testThree would run three times

each with a different parameter. Does anyone know if there is a reason for this

implementation.

>

>

>

>

>

>

>

> ------------------------------------

>

> Yahoo! Groups Links

>

>

>

>

It seems like this is intended. The documentation here:

http://junit.org/apidocs/org/junit/runners/Parameterized.html

When running a parameterized test class, instances are created for the

cross-product of the test methods and the test data elements.



If you think about it, how would junit figure out which are your instances

that require the parameters? I mean theres no way to figure out based on the

testThree method that this is the one that should be run with different

parameters.



Seems allright to me.



On Fri, Jul 3, 2009 at 15:27, kartik_krishnanand <

kartik_krishnanand@...> wrote:



>

>

> Hi,

>

> I tried to generate parameteric tests with JUnit 4.6. I don't know if this

> is an expected behavior.

>

> Test Code

>

> @RunWith(Parameterized.class)

> public class JUnit4Test {

>

> private String name;

>

> @BeforeClass

> public static void setUpOnceBeforeClass() throws Exception {

> System.out.println("Before Class");

> }

>

> @Before

> public void setUp() throws Exception {

> System.out.println("Before Method");

> }

>

> @After

> public void tearDown() throws Exception {

> System.out.println("After Method");

> }

>

> @AfterClass

> public static void tearDownOnceAfterClass() throws Exception {

> System.out.println("After Class");

> }

>

> @Test()

> public void testOne() throws Exception {

> System.out.println("One");

> }

>

> @Test

> public void testTwo() throws Exception {

> System.out.println("Two");

> }

>

> @Test

> public void testThree() throws Exception {

> System.out.println(this.name);

> }

>

> public JUnit4Test(String name) {

> this.name = name;

> }

>

> @Parameters

> public static Collection<Object[]> getNames() {

> return Arrays.asList(new Object[][] {

> {"Kartik"}, {"Rakesh"}, {"Ed"}

> });

> }

> }

>

> My output

>

> Before Class

> Before Method

> One

> After Method

> Before Method

> Two

> After Method

>

> Before Method

> Kartik

> After Method

> Before Method

> One

> After Method

> Before Method

> Two

> After Method

> Before Method

> Rakesh

> After Method

> Before Method

> One

> After Method

> Before Method

> Two

> After Method

> Before Method

> Ed

> After Method

> After Class

>

> It runs the unit tests three times. The testOne, testTwo outputs remain

> unchanged, the testThree output changes with the depending upon the name.

>

> Is this the expected behavior? I expected that testThree would run three

> times each with a different parameter. Does anyone know if there is a reason

> for this implementation.

>

>

>







--

Regards,

Puneet





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