Mastering TestNG For Automation - From Basics To Advanced

Explore TestNG @Test annotations in detail, including priority, enabled/disabled, timeout, and invocationCount, to control test order, execution, and repeatability with practical login, search, and logout examples.

Explore how before class and after class annotations run once before and after all test methods, enabling resource setup and cleanup for the whole class.

Explore how @BeforeSuite and @AfterSuite manage global setup and cleanup across a test suite. Initialize resources like database, selenium grid, and config before tests, then clean up afterward.

Explore how @BeforeTest and @AfterTest manage setup and teardown for class groups in TestNG, as demonstrated with a common test setup, login and checkout tests, and XML configuration.

Discover how to run TestNG tests without XML, using both IDE-based and programmatic Java approaches with a listener to capture results.

Explore the annotation execution order in TestNG, a demo that walks through before suit, before test, before class, before method, test, after method, after class, after test, and after suit.

Explore the difference between @BeforeClass and @BeforeMethod in TestNG, understanding that @BeforeClass runs once before all test methods, while @BeforeMethod runs before each test method.

Mastering TestNG for automation demonstrates that you can skip @AfterMethod, but you forgo per-test cleanup. A practical demo contrasts before method setup, test execution, and after method cleanup.

Master hard assertions such as assert true, assert false, assert equals, and assert not equals to validate expected versus actual results, stopping the test on failure.

Explore soft assertions in testing, learn how they let tests continue after failures, and see how assert all collects and reports all errors at the end.

Learn to use custom assertion messages in TestNG to reveal exact failure reasons, replacing generic errors with meaningful debugging details like login failures and mismatched counts.

Learn how soft asserts are not thread safe in parallel test execution, and why each test must create its own soft assert object to avoid mixed results.

Pass parameters from testng.xml into test methods to avoid hard coding, injecting username and password automatically for flexible, reusable tests.

Learn to use data provider in TestNG to run the same test multiple times with different input data, using single and multi-dimensional arrays to inject username and password automatically.

Externalize test data for TestNG automation by reading from Excel (Apache POI) and CSV, using data provider to feed username and password dynamically.

Learn to run the same test with multiple data sets using a TestNG data provider, including creating and naming the provider, wiring it to the test, and enabling data-driven testing.

Compare parameters and data providers in TestNG: parameters pull a browser and URL from testng.xml, while data providers supply multiple data sets via a Java method for data-driven testing.

Master TestNG test grouping by using the @Test(groups) attribute to tag tests as smoke or regression, include or exclude groups, and run only the selected sets with a grouping demo.

Mastering TestNG uses depends on methods to enforce test order and skip dependent tests when a prerequisite fails, demonstrated with login, payment, and logout workflows.

Explore TestNG's alwaysRun parameter to run tests even when dependencies fail, and how enabled=false skips tests. See login, payment, logout, and report download examples.

Exclude specific groups in TestNG by editing the testing.xml to skip regression while running smoke tests. Learn how group-based test organization enables running a subset of tests without editing code.

Learn to run multiple tests in parallel with TestNG by configuring multithreading in the testing.xml file, using parallel = classes and thread counts to speed up regression suites.

Discover parallel execution in test automation with TestNG by running methods, classes, or tests concurrently to speed up large suites. Learn about per-thread drivers, thread counts, and cross-browser testing.

Master the cross-browser setup to run the same automation test across multiple browsers using a browser parameter to initialize WebDriver (Chrome, Firefox, Safari) and enable parallel execution.

Explore thread safety in parallel test execution, diagnose flaky tests from shared WebDriver instances, and implement thread-local WebDriver management for safe, reliable TestNG automation.

Integrate WebDriver Manager with Selenium to auto download and setup Chrome and Firefox drivers, eliminating manual downloads and version mismatches for cross-browser testing with TestNG.

Discover how to run TestNG data providers in parallel by enabling parallel = true, understand sequential default behavior, and implement parallel selenium login tests with separate WebDriver instances.

Learn how to run the same test suite across Chrome and Firefox using TestNG parameterization, setup and teardown, and parallel execution for cross-browser automation.

Explore why flaky tests occur in real projects, from timing and environment instability to dynamic test data and external dependencies, and apply explicit waits and retry strategies to stabilize tests.

The retry analyzer automatically reruns failed tests to reduce flaky failures, configurable to retry up to two times, and can be used with tests like selenium or API tests.

Using ITestResult for debugging explains how ITestResult stores test method execution data, including status, throwable, method name, and thread id, enabling debugging, failure analysis, and parallel execution insights.

Learn to capture Selenium screenshots on test failure, saving PNGs to a screenshots folder for debugging and reporting using a static capture method with WebDriver in a Maven project.

Automatically log test events with TestNG listeners to capture start, pass, fail, and skip statuses for debugging and reporting. Attach with @Listeners and implement onTestStart, onTestSuccess, onTestFailure, onTestSkipped.

Explore how to automatically rerun failed tests with a retry analyzer in TestNG, using a max retry count of two to handle flaky tests.

Contrast retry analyzer with depends on methods, showing how retries handle flaky login failures and dependent tests like order, plus a demo of max retry count.

Explore how to capture logs, screenshots, and stack traces for failed tests in TestNG using an ITestListener, handling onTestFailure to record test name, failure reason, and throwable.

Discover how TestNG listeners monitor test execution with onTestStart, onTestSuccess, onTestFailure, onTestSkip, and onFinish, enabling custom actions like logging, screenshots, emails, or retries.

Implement ITestListener in TestNG to trigger on test start, success, failure, and skip, log results, and support advanced reporting and debugging in Selenium frameworks.

Implement a TestNG screenshot listener that automatically captures a browser screenshot on test failure and saves it with a test name in a dedicated screenshots directory using a screenshot utility.

Combine listeners with a retry analyzer in TestNG to automatically retry failed tests up to two additional attempts, while a retry listener logs outcomes.

Compare the differences between @Listeners annotation and XML listener config in TestNG, showing per-class versus global suite use and why XML is preferred in professional automation frameworks.

Learn how to implement and attach a custom listener in your test framework, handling on test failure and on test success to capture screenshots, log results, and report outcomes.

Explore how default TestNG HTML and XML reports are generated, where to find them—index.html and testing results.xml—and how to view pass, fail, and skip tests.

Identify the limitations of built-in test reports in TestNG automation, including plain UI, missing screenshots, and limited logs, and learn to use extend reports and custom loggers for richer dashboards.

Integrate extent reports with TestNG to generate interactive dashboards and logs, configure Maven dependencies, implement a test listener, and produce a detailed extent report HTML with system info.

Mastering TestNG for automation from basics to advanced explains dynamic disabling of tests using skip exceptions and listeners, enabling runtime decisions from config or environment.

Set timeouts at test and suite levels in TestNG to prevent long-running tests from hanging. The lecture demonstrates fast versus slow tests and a 3-second suite timeout for reliability.

Learn to use expected exceptions in TestNG to validate thrown errors, ensuring tests pass when the correct exception occurs and fail when it does not.

Master parallel data provider execution in TestNG by configuring the data provider for parallel runs, returning multiple user data sets, and running login tests concurrently on separate threads.

Enable parallel execution in TestNG data providers to run multiple test data sets concurrently, speeding up login tests with a data provider named 'User data' set to parallel = true.