SDET Interview Preparation - TestNG

1. Introduction to TestNG:

TestNG is a testing framework inspired by JUnit and NUnit but introduces some new functionalities that make it more powerful and easier to use. It's used for unit testing, functional testing, and end-to-end testing.

Understand what TestNG is, its purpose, and why it's used in software testing.

2. TestNG Installation and Setup:

This involves installing the TestNG plugin in your IDE (like Eclipse or IntelliJ) and setting up your first TestNG project.

Learn how to install TestNG and set it up in your development environment.

3. Writing Basic TestNG Tests:

TestNG uses annotations to identify test methods. Understand how to write tests using @Test, @BeforeTest, @AfterTest, and other basic annotations.

Understand how to write simple tests using TestNG annotations like @Test, @BeforeTest, and @AfterTest.

4. TestNG Assertions:

Assertions are used to validate the outcome of tests. TestNG provides a variety of assert methods to cater to different needs.

Learn how to use assertions in TestNG to validate test outcomes.

5. TestNG Annotations:

TestNG provides several annotations like @BeforeSuite, @AfterSuite, @BeforeClass, @AfterClass, etc. These annotations allow you to execute methods before or after various points in your test suite.

Understand the various annotations provided by TestNG and their order of execution.

6. Running Tests in Parallel:

TestNG allows you to run tests in parallel, reducing the overall test execution time. Understand how to configure parallel test execution.

Learn how to run tests concurrently in TestNG to reduce execution time.

7. TestNG Data Providers:

The @DataProvider annotation is used to pass data to the test methods. This is especially useful for data-driven testing.

Understand how to use the @DataProvider annotation to pass data to tests.

8. TestNG XML Suite:

TestNG allows you to create XML files to manage test suites and test cases. Understand how to create and use these XML files.

Learn how to create and run test suites using TestNG XML configuration files.

9. TestNG Listeners:

Listeners "listen" to the event defined in the selenium script and behave accordingly. They are activated either before the test or after the test case.

Understand what listeners are and how to use them to modify TestNG's default behavior or log data.

10. TestNG Reporting:

TestNG can generate detailed HTML reports that provide information about the number of tests passed, failed, or skipped, along with the time taken for execution.

Learn about TestNG's built-in reporting features and how to generate test reports.

11. Exception Handling in TestNG:

The expectedExceptions attribute of the @Test annotation is used to specify the exceptions that a test method is expected to throw.

Understand how to handle exceptions in TestNG tests using the expectedExceptions attribute.

12. TestNG with Selenium:

Selenium is used for automating browser activities. TestNG can be used along with Selenium to run tests on different browsers and to generate reports.

Learn how to integrate TestNG with Selenium for automated browser testing.

13. TestNG with Maven:

Maven can be used to execute tests written in TestNG. Understand how to configure the pom.xml file to run TestNG tests.

Understand how to integrate TestNG with Maven for build automation and dependency management.

14. Best Practices:

These include practices like keeping tests independent, cleaning up after tests, and naming tests clearly.

Learn the best practices for writing and organizing tests in TestNG.

15. Advanced TestNG Concepts:

This includes understanding topics like custom listeners, retry logic using IRetryAnalyzer, and creating tests dynamically with the @Factory annotation.

Cover advanced topics like custom listeners, retry analyzers, and factory annotations.

You can also connect with me to upskill in TestNG through personalized long-term mentorship on Preplaced.

You can book a free trial session on Preplaced!