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Session 42 Introduction to TestNG

TestNG

🧪 TestNG Notes (Corrected + Clear Version)

  • In TestNG, we do not use the main method.

  • You need to create test methods in TestNG depending on how many steps are required to execute the test case.

  • To execute a test method, you must use the @Test annotation on top of it.

  • By default, TestNG executes test methods in alphabetical order.

  • To override the alphabetical execution, use the priority parameter in the @Test annotation.
    Example: @Test(priority = 1)

  • If you do not set any priority, TestNG assigns a default priority of 0.

  • If multiple test methods have the same priority, then TestNG will again execute them in alphabetical order.

  • You can also provide negative numbers as priority values. (e.g., priority = -1).

  • TestNG will execute only those methods which have the @Test annotation.

  • If all @Test annotations are removed or commented, and you try to run the script, it will show:
    "No tests found. Nothing was run."

🔢 Execution Order Summary

  1. TestNG executes test methods in alphabetical order by default.

  2. @Test(priority = <number>) controls the execution order.

  3. If you provide priority, then alphabetical order is ignored.

  4. Priorities can be random numbers (they need not be sequential).

  5. Default priority is 0 if not specified.

  6. If priorities are the same, TestNG follows alphabetical order.

  7. ✅ Negative values are allowed in priorities.

  8. Only methods annotated with @Test will be executed.

📄 Creating a Test Suite in TestNG

  • To generate a TestNG XML suite,
    Right-click on the package where all test cases are present → TestNG → Convert to TestNG → Finish.

  • It generates an XML file (test suite) used to:

    • Run tests in cross-browser environments.

    • Run multiple tests simultaneously (parallel execution).

📊 Viewing Reports

  • To view the TestNG report for the first time, refresh the Selenium WebDriver project.

  • After each test execution, refresh the test-output folder to see the updated report.

✅ Bonus Suggestions:

  • Try to mention that @BeforeMethod and @AfterMethod can be used for setup and cleanup before/after each test method.

  • You can also use dependsOnMethods for controlling test dependencies.