JUnit
- Definition: JUnit is a widely used testing framework for Java that allows developers to
write and run unit tests to validate the functionality of their code.
What are Unit Tests?
- Unit vs. Integration: Unit tests verify the behavior of small, isolated pieces
of code (units), while integration tests ensure that different units work
correctly together as a whole
- Purpose: The goal of unit tests is to ensure that individual functions or methods perform
as expected, without relying on external systems or dependencies.
- Benefits: Unit tests help catch bugs early in the development process, make code more
maintainable, and improve confidence in the correctness of the codebase.
- Test Coverage: High test coverage with unit tests ensures that a majority of the code is
tested, making it easier to detect issues before deployment.
JUnit Usage and Functions
Test Methods: In JUnit, test functions are typically annotated with `@Test` to indicate that they are test cases.
These functions contain assertions to verify that the code behaves as expected.
Assertions: JUnit provides various assertion methods to check conditions in tests, such as:
- assertEquals(expected, actual): Checks if two values are equal.
- assertTrue(condition): Verifies that a condition is true.
- assertFalse(condition): Verifies that a condition is false.
- assertNotNull(object): Ensures that an object is not null.
- assertNull(object): Ensures that an object is null.
A more extensive guide to JUnit:
geeksforgeeks JUnit article