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What are the differences between junit 4 and junit 5?


Asked by Braden Swanson on Dec 06, 2021 jUnit



Before Junit 5, the JUnit 4 version of the library used two types of components for extending a test: test runners and rules. By comparison, JUnit 5 simplifies the extension mechanism by introducing a single concept: the Extension API. 2. JUnit 5 Extension Model
Next,
TestNG supports parallel testing, while JUnit does not have such a feature. The process of parameterized test configuration in TestNG is easier than in JUnit (it requires more time and effort). JUnit does not support group test, while in TestNG, the specialists are able to administrate certain tests to a large group of people at the same time.
In this manner, JUnit 5 Advantages Let's start with the previous version – JUnit 4 has some clear limitations: The entire framework was contained in a single jar library. The whole library needs to be imported even when only a particular feature is required. In JUnit 5, we get more granularity and can import only what is necessary
Thereof,
Listeners are supported both in JUnit as well as TestNG. So, if you wish to perform certain tasks or show a specific message in the log before the test starts, after the test finishes, when the test is skipped, when the test is passed or failed, we have these Listener functions which enable us to do this
Similarly,
Exception class states that when the test executes, the exception of the given class is thrown. This is supported both in JUnit and TestNG with variation in the way both are declared. A method with annotation @AfterSuite is executed once after the current test suite runs.