Junit
4 likes3,648 views
The document provides an overview of JUnit, a widely used framework for unit testing in Java, detailing its features, setup, and creating unit test cases. It highlights important components such as annotations, assertions, parameterized tests, and suites, emphasizing the significance of structured testing. Additional resources are mentioned for further exploration of JUnit functionalities.
Junit
- 1. Ravi Kant Soni Senior Software Engineer i-Admin , Bangalore i-Admin,Bangalore 1
- 2. WHAT IS TESTING Testing is the process of checking the functionality of the application whether it is working as per requirements 2 i-Admin,Bangalore
- 3. WHAT IS JUNIT DeFacto framework for developing unit test in java Currently version 4.x Developed by Erich Gamma & Kent Beck Released under IBM, and hosted on sourcefog Promotes the idea of "first testing then coding“ 3 i-Admin,Bangalore
- 4. FEATURES OF JUNIT An open source framework which is used for writing & running tests Shows test progress in a bar that is green if test is going fine and it turns red when a test fails Provides Annotation & Assertions 4 i-Admin,Bangalore
- 5. WHAT IS UNIT TEST CASES? Unit testing is the testing of single entity (class or method) A Unit Test Case is a part of code which ensures that the another part of code (method) works as expected There must be at least two test cases for each requirement: one positive test and one negative test 5 i-Admin,Bangalore
- 6. JUNIT ENVIRONMENT SETUP JUnit is a framework for Java, so the very first requirement is to have JDK installed in your machine. Download latest version of JUnit jar file from http://www.junit.org. 6 i-Admin,Bangalore
- 8. JUNIT 4 8 i-Admin,Bangalore Automatically recognizes test methods preceded by @Test annotation No need for main() to run the tests Test methods must be public, void, with no parameters
- 9. EXAMPLE import org.junit.Test; // for @Test import static org.junit.Assert.assertEquals; // assertEquals() public class TestJunit { @Test public void testAdd() { assertEquals(2, 2 + 1); } } 9 i-Admin,Bangalore
- 12. JUNIT TEST OUTPUT 12 i-Admin,Bangalore Runs Total number of tests run Failures Tests that failed. For example assertions that failed. Errors Tests that generated unhandled (unexpected) exceptions. Time elapsed (ms)
- 13. JUNIT CLASSES JUnit classes are important classes which is used in writing and testing Junits Assert which contain a set of assert methods TestCase which contain a test case defines the fixture to run multiple tests 13 i-Admin,Bangalore
- 14. ASSERT org.junit.Assert.* static methods: void assertEquals(expected, actual) Works with object, int, long, byte, string, etc Object: it invokes object.equals(object) for equality assertEquals (expected, actual, εpsilon) float and double void assertFalse/ True(boolean condition) void assertNull/ NotNull(Object object) void fail() 14 i-Admin,Bangalore
- 16. ANNOTATION Annotations are like meta-tags @Test @Before @After @BeforeClass @AfterClass @Ignore 16 i-Admin,Bangalore
- 18. PARAMETERIZED TEST Allows you to run the same test with different data @RunWith(Parameterized.class) public static method that returns a Collection of data Collection must be an Array of the various parameters used for the test public constructor that uses the parameters 18 i-Admin,Bangalore
- 20. SUITES Specify an execution order Add @Suite to an empty class @RunWith(Suite.class) @Suite.SuiteClasses({SomeTest.class}) public class AllTests { } 20 i-Admin,Bangalore
- 23. GOOD UNIT TEST Any static utility method must have test Make exception tests Business models with equals and hashcode Test that “something is true” but also that “not-something is false” Give your tests meaningful names 23 i-Admin,Bangalore
- 24. MORE RESOURCE Official site: www.junit.org JUnit cook book http://junit.sourceforge.net/doc/cookbook /cookbook.htm (one recipe long!) JUnit Javadoc: http://junit.org/junit/javadoc/4.5/ 24 i-Admin,Bangalore