What is TestNG

TestNG is an automation testing framework where NG is Next Generation.

By using TestNG one can easily generate a report in HTML format, and can analyse the number of test cases that have passed , failed and skipped. It basically gives a overview of the test.

TestNG , like JUnit uses the annotations. i.e @ symbol

                                 

                     

Why to use TestNG with Selenium?

1. Selenium tests do produce results, but they are not in a expected format for the test results. But by using TestNG one can generate these much expected test results.

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     2. Generating the report in a proper format includes  number of test cases runs, the number of test cases passed, the number of test cases failed, and the number of test cases skipped.

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           3. Multiple test cases can be grouped easily by converting them into.xml file. One can also prioritise which test case should be executed first, middle or last.

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          4. The same test case can be executed multiple times without loops just by using keyword called 'invocation count.'

·         Using  TestNG one can achieve cross browser testing.

·         The testing framework can be easily integrated with build tools like Maven, Ant etc.

TestNG Annotations

@BeforeSuite: The annotated method will be run before all tests in this suite have run.

@AfterSuite: The annotated method will be run after all tests in this suite have run.

@BeforeGroups: The list of groups that this configuration method will run before. This method is guaranteed to run shortly before the first test method that belongs to any of these groups is invoked.

@AfterGroups: The list of groups that this configuration method will run after. This method is guaranteed to run shortly after the last test method that belongs to any of these groups is invoked.

@BeforeTest: The annotated method will be run before any test method belonging to the classes inside the tag is run.

@AfterTest: The annotated method will be run after all the test methods belonging to the classes inside the tag have run.

@BeforeMethod: The annotated method will be run before each test method.

@AfterMethod: The annotated method will be run after each test method.

@Test: The annotated method is a part of a test case

@BeforeClass: The annotated method will be run before the first test method in the current class is invoked.

@AfterClass: The annotated method will be run after all the test methods in the current class have been run.