What is TestNG and how does it differ from JUnit?

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TestNG vs. JUnit: A Comparative Overview

TestNG is a Java testing framework inspired by JUnit and NUnit, designed to cover a broader range of testing categories, including unit, functional, end-to-end, and integration testing. Its primary goal is to provide a more flexible and powerful testing platform.

JUnit, on the other hand, is a widely used testing framework for Java, primarily focused on unit testing. It has been a standard in the Java community for many years and has evolved through various versions to include more features and improvements.

🔍 Key Differences

Feature TestNG JUnit

Annotations Rich set: @Test, @BeforeSuite, @AfterSuite, @BeforeMethod, @AfterMethod, etc. Standard set: @Test, @Before, @After, etc.

Parallel Execution Built-in support for parallel test execution Limited support; requires external configuration

Dependency Testing Supports test dependencies using dependsOnMethods Limited support; requires workarounds

Data-Driven Testing Native support with @DataProvider annotation Supported via @ParameterizedTest annotation

Test Grouping Allows grouping of tests using groups attribute No native support; can be achieved with categories

Reporting Generates detailed HTML and XML reports by default Basic reporting; requires external tools for advanced reports

Listeners Provides listeners for customizing test execution behavior Offers listeners for various events in the test lifecycle

Suites Allows grouping tests into suites for better organization Does not have native support for test suites

Ecosystem Primarily used in Java projects; extensions allow integration with other languages Predominantly used in Java projects; limited support for other languages

Community Support Strong and active community with regular updates Well-established with a robust community and extensive documentation

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