What are some advantages of TestNG?

TestNG provides a rich set of features that make it superior to JUnit for Selenium automation:

1. Assertions Validates expected vs actual values with detailed failure messages.

Assert.assertEquals(driver.getTitle(), "Home Page", "Title mismatch!");
Assert.assertTrue(element.isDisplayed(), "Element not visible");

2. Parallel Execution Run test methods, classes, or suites simultaneously to reduce execution time.

<suite name="MySuite" parallel="methods" thread-count="3">

3. Test Method Dependencies Ensure one test runs only after another passes.

@Test(dependsOnMethods = { "loginTest" })
public void dashboardTest() { }

4. Priority Assignment Control execution order by setting priority values.

@Test(priority = 1)
public void firstTest() { }

@Test(priority = 2)
public void secondTest() { }

5. Test Grouping Organize tests into groups for selective execution.

@Test(groups = { "sanity", "regression" })
public void loginTest() { }

6. Data-Driven Testing via @DataProvider Run the same test with multiple data sets.

@DataProvider(name = "loginData")
public Object[][] getData() {
    return new Object[][] {{"user1","pass1"}, {"user2","pass2"}};
}

@Test(dataProvider = "loginData")
public void loginTest(String user, String pass) { }

7. Built-in Reporting Auto-generates index.html and emailable-report.html without plugins.

8. @Parameters Support Pass values from testng.xml to test methods.

@Parameters("browser")
@Test
public void launchBrowser(String browser) { }

Summary list:

1. ✓Different assertion types for flexible validation
2. ✓Parallel execution of test methods
3. ✓Dependency between test methods
4. ✓Priority assignment for test methods
5. ✓Grouping of test methods into test groups
6. ✓Data-driven testing via @DataProvider
7. ✓Inherent HTML reporting support
8. ✓Parameter passing via @Parameters annotation