Is it possible to name a test suite in JUnit 4? - junit

In JUnit3, one would could name a test suite like this:
public static Test suite() {
TestSuite suite = new TestSuite("Some test collection");
suite.addTestSuite(TestX.class);
return suite;
}
Is there an equivalent way to do this in JUnit4?
Thanks.
EDIT
Thank you, I actually managed to get it working. My question was if there is a JUnit4 equivalent way of specifying the name/description of a test suite, like in JUnit3 with "Some test collection".
Some background:
I'm converting junit tests in legacy code to the version 4, and I don't want to lose any information if possible. I apologize, I should really have been more specific in the original question.

You can do this with the Suite runner #RunWith(Suite.class):
#RunWith(Suite.class)
#SuiteClasses({Test1.class, Test2.class, TestX.class})
public class MySuite {}
Where Test1, Test2, TestX contain your tests
ref. RunWith, Suite
update:
WRT changing the actual description of your suite, I don't think there's a way to do it out-of-the-box (if there is I haven't seen it yet). What you can do, is to define your own runner with a custom description [update2]:
#RunWith(DescribedSuiteRunner.class)
#SuiteClasses({Test1.class, Test2.class, TestX.class})
#SuiteDescription("Some test collection")
public class MySuite {}
public class DescribedSuiteRunner extends Suite {
// forward to Suite
public DescribedSuiteRunner(Class<?> klass, RunnerBuilder builder)
throws InitializationError {
super(klass, builder);
}
#Override
protected String getName() {
return getTestClass()
.getJavaClass()
.getAnnotation(SuiteDescription.class)
.value();
}
}
#Retention(RetentionPolicy.RUNTIME)
#Target(ElementType.TYPE)
public #interface SuiteDescription {
String value();
}
The default implementation of getName just returns the class being tested's name

Yes, In JUnit 3.x, the JUnit methods had to be specifically named. They needed to begin with the word test in order for JUnit to run that as a test case. Now you can just use the #Test annotation:
#Test
public void thisIsMyTest() {
// test goes here
}
Also in JUnit4 you can state if you want some tests to run before or after all the tests in this class are invoked:
#Before
public void init() throws Exception {
System.out.println("Initializing...");
}
#After
public void finish() throws Exception {
System.out.println("Finishing...");
}
Further comparisons between JUnit3 and JUnit4 here and here.
Edit: after blgt's comment, I see I might have misunderstood your intent.
You are probably looking for #RunWith(Suite.class) - When a class is annotated with #RunWith, JUnit will invoke the class in which is annotated so as to run the tests, instead of using the runner built into JUnit. Full example of usage is here, tl;dr below:
#RunWith(Suite.class)
#SuiteClasses({ FirstTest.class, SecondTest.class })
public class AllTests {
...
}

Related

Annotation for method, which must work before a group of features (Cucumber + Junit)

Cucumber supports hooks -- methods that run before or after a scenario.
The #Before and #After annotations are used to mark them.
A method with #Before annotation will run before each scenario, #After -- after each scenario.
An example of a class with hooks:
public class Hooks {
#Before
public void init() {
System.out.println("before each Cucumber scenario");
}
#After
public void stop() {
System.out.println("after each Cucumber scenario");
}
}
Can you tell me, please, what annotations I must use in order to run method 1 time before the entire group of Cucumber-scenarios (feature-files)?
If there is no such annotation, then how can we do it in another way?
You can use the standard Junit annotation #BeforeAll and #AfterAll
#BeforeAll methods are only executed once for a given test class.
#BeforeAll is used to signal that the annotated method should be executed before all tests in the current test class.
Please refer this documentation #BeforeAll

Unable to Mock functions inside static method Powermock

I am writing unit test for the below code using junit and mockito
public class Abc implements Runnable
{
private static ServerSocket server;
private static int port;
public Abc(int cPort)
{
port = cPort;
}
public void run()
{
init();
}
public static void init()
{
try {
server = new ServerSocket(port);
...something...
client.close();
}
}
catch(IOException e)
{
System.out.println("Exception inside init()...");
e.printStackTrace();
}
}
};
Unit test I have written
#RunWith(PowerMockRunner.class)
#PrepareForTest({ServerSocket.class})
public class abcTest {
#Mock (name = "server") //same name as private var.
ServerSocket mockServer;
#InjectMocks
Abc abc;
#Test
public void testInit() throws Exception {
int port = 1880;
Socket mockClient = Mockito.mock(Socket.class);
PowerMockito.whenNew(ServerSocket.class).
withArguments(anyInt()).thenReturn(mockServer);
abc = new Abc(port);
Abc.init();
PowerMockito.verifyNew(ServerSocket.class).withArguments(port);
}
};
But the call always go to original function definition. I am using junit 4.11 with mockito 2.28.2 and powermockito 2.0.2. I'm using java after a long time. Now its feel like kind of new. Please correct me if anything wrong in the code also.
You will need to change your PrepareForTest annotation
to #PrepareForTest({Abc.class}).
From the PowerMockito docu:
This annotation tells PowerMock to prepare certain classes for testing. Classes needed to be defined using this annotation are typically those that needs to be byte-code manipulated
In this case that refers to the class which creates the new instance of ServerSocket. ServerSocket itself is a non-final public class that does not require special handling from PowerMockito (instead Mockito can deal with this class on its own).
You could also change your test to do the following:
#Test
public void testInit() throws Exception {
int port = 1880;
ServerSocket mockServer = Mockito.mock(ServerSocket.class);
PowerMockito.whenNew(ServerSocket.class)
.withArguments(Mockito.anyInt()).thenReturn(mockServer);
Abc.port = port;
Abc.init();
PowerMockito.verifyNew(ServerSocket.class).withArguments(port);
}
(This first point is unrelated to whether the test fails or succeeds)
I do not know why you mix object's and static method behaviour together, but I think you should change that.In the test instead of creatic an ABC object, just could just set the static port variable directly.
Or alternatively change the whole ABC class into an object.
#InjectMocks failed for me as there is no default constructor
(Actually I got an error message in the console when trying to execute your code)
Additonaly you create a new instance of ABC in your test, which would have overwritten the things done by the annotations. Also as server is created during the init call, there is no need to inject a mock for it.
powermockito 2.0.2 actually depends on junit 4.12, so I am not sure what effects downgrading to an older version might have.
Socket mockClient seemed somewhat unrelated to the code your posted, so I removed it from my example in the answer, however as you use a client (I assume that is your Socket) in your code your probably need to do some mocking for that as well and provide the mock to the method accordingly.

How to two runner property include in one test case class?

#RunWith(DataProviderRunner.class)
#RunWith(SpringJUnit4ClassRunner.class)
public class DatabaseModelTest {
// some tests
}
or
#RunWith(Parameterized.class)
#RunWith(SpringJUnit4ClassRunner.class)
public class DatabaseModelTest {
// some tests
}
We can not use two runner property in one test case class...!! so that
I want to run test case with Multiple data how i pass multiple parameter in Rest web service to execute test case ??
Any solution for extend class for DataProviderRunner or parameterized ??
Thanks
(stayconnected52)
You could use Spring's JUnit rules instead of the SpringJUnit4ClassRunner. This works at least with the Parameterized runner. I don't know whether it works with the DataProviderRunner, too.
You need at least version 4.2.0 of the Spring framework and spring-test.
#RunWith(Parameterized.class)
public class DatabaseModelTest {
#ClassRule
public static final SpringClassRule SCR = new SpringClassRule();
#Rule
public final SpringMethodRule springMethodRule = new SpringMethodRule();
...
}
I tested the solution of #Stefan and works also well for #RunWith(DataProviderRunner.class)
I found a second solution in DataProvider for Spring Integration Testing, they wrote a class DataProviderRunnerWithSpring and set the test class like:
#RunWith(DataProviderRunnerWithSpring.class)
public class TestClass{
...
}

Junit: How to stubs the following java class in junit

Hi I have a class which the invoke the run() method of a thread from the constructor of the class by calling the start() method , So please help me to Stubs the so to write the junit test cases . The class is as follows
public class MyClass extends Thread {
Student st=null;
University uni= new University();
public MyClass(Student st) {
this.st=st;
start();
}
public void run() {
uni.calculate(st);
}
}
Thanks
Take a look at the discussion here:
Testing Constructor With Powermock
It discusses sub-classing and overriding.
In general it should be considered bad practice to have to mock the class under test in order to test it. It is also hard to do since most mocking frameworks will not allow mocking a single method once in the class under test since they create wrapping proxies.

How to add test suite dynamically in junit 4.10

I wanted to know if there's any way to add test suites dynamically in junit 4.
For example I have a TestClassA as mentioned below having test case "test1"
class TestClassA
{
#Test
public void test1()
{
createTestClassDynamically(); // this creates a test class having
// setUp(), tearDown() methods and one test case .
}
}
Test case test1 has a method createTestClassDynamically() that dynamically creates a new test class (lets say TestClassB) having setUp(), tearDown() methods and one test case (lets say test2()).
I want to run the test1 and then when TestClassB is dynamically generated I want test case "test2" also to be executed.
I know this is quite complicated and not the best thing to do but in my framework I need to do it to generate large number of test classes dynamically rather than having them physically in the package.
Can anyone please provide any help/suggestions?
I have solved this is my framework using the Parameterized feature of Junit 4 which helps to execute same test case with different parameters.
Below mentioned is the sample code on how I acheived it, thought to post it if it helps anyone.
Also, if someone has a better solution, feel free to post it.
class TestClassA
{
private TestClassB classBObj;
public TestClassA(TestClassB obj) {
classBObj= obj;
}
#Test
public void test1()
{
// createTestClassDynamically(); // remove this method as Parameterized
// feature will take care of dynamic test execution.
}
#Test
public void test2()
{
// Test case from Test class B using TestClassB object (classBObj)
}
public static Collection<Object[]> getParameters() {
Collection<Object[]> parameteres = new ArrayList<Object[]>();
Object[] obj1 = new Object[]{new TestClassB()};
Object[] obj2 = new Object[]{new TestClassB()};
parameteres.add(obj1);
parameteres.add(obj2);
// ....... add more test data this way or create a loop
return parameteres;
}
}