Q1. What are the annotations used in Junit with Junit4 ?
Ans. @Test
The Test annotation indicates that the public void method to which it is attached can be run as a test case.
@Before
The Before annotation indicates that this method must be executed before each test in the class, so as to execute some preconditions necessary for the test.
@BeforeClass
The BeforeClass annotation indicates that the static method to which is attached must be executed once and before all tests in the class.
@After
The After annotation indicates that this method gets executed after execution of each test.
@AfterClass
The AfterClass annotation can be used when a method needs to be executed after executing all the tests in a JUnit Test Case class so as to clean-up the set-up.
@Ignores
The Ignore annotation can be used when you want temporarily disable the execution of a specific test.
Q2. How to create a Junit to make sure that the tested method throws an exception ?
Ans. Using annotation Test with the argument as expected exception.
@Test (expected = Exception.class)
Q3. How should we ignore or avoid executing set of tests ?
Ans. We can remove @Test from the respective test so as to avoid its execution. Alternatively we can put @Ignore annotation on the Junit file if we want to ignore all tests in a particular file.
Q4. How can we test methods individually which are not visible or declared private ?
Ans. We can either increase their visibility and mark them with annotation @VisibleForTesting or can use reflection to individually test those methods.
Q5. Which of the following annotation is used to avoid executing Junits ?
a. @explicit
b. @ignore
c. @avoid
d. @NoTest
Ans. @ignore