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TestNG Tutorial

TestNG Introduction :-

–> TestNG is a unit test framework designed for testing needs (developers / Test Engineers). 

–> TestNG is an open source  test automation framework, where NG stands for Next Generation.

–> TestNG inspired from Junit and Nuit but introduced some new functionalities, that made TestNG is more powerfull than Junit and Nuint frameworks.

–> It is designed to cover all categories of tests – Unit, functional, end-to-end, integration, regression, retesting etc.

–> TestNG allows users to do test configuration through XML files and allows them to include (or exclude) respective packages, classes, and methods in their test suite.

  • WebDriver has no native mechanism for generating reports.
  • TestNG can generate reports based on our Selenium test results.
  • TestNG can generate the report in a readable format.
  • There is no more need for a static main method in our tests. 
  • The sequence of actions is regulated by easy-to-understand annotations that do not require methods to be static.
  • Uncaught exceptions are automatically handled by TestNG without terminating the test prematurely and These exceptions are reported as failed steps in the report.

Advantages / Benfits of TestNG Framework :-
–> It is easier to use.
–> It is supported by a variety of tools and plug-ins (Eclipse, IDEA, netbeans, Maven, etc…)
–> Flexible test configuration.
–> It generates HTML test reports.
–> Support for data-driven testing (with @DataProvider).
–> Support for parameters.
–> Support for multi threaded testing.
–> Supports testing integrated classes (e.g., by default, no need to create a new test class instance for every test method).
–> TestNG Annotations are easy to create Test cases.
–> Test cases can be grouped and prioritized more easily.
–> Parlell Testng is possible.
–> Parameterization is possible.
–> We can execute the test cases in the order which we provide using priority.
–> We can run classes without using Main method.
–> Default JDK functions for runtime and logging (no dependencies). 
–> To read the data from Excel file.
–> Supports Dependent test methods is possible.
–> Embeds BeanShell for further flexibility.
–> TestNG is designed to cover all categories of tests:  unit, functional, end-to-end, integration, etc etc..
–> Supports testing integrated classes (e.g., by default, no need to create a new test class instance for every test method).
–> Supported more/different Annotations like 
1) @Test 
2) @BeforeSuite 
3) @AfterSuite 
4) @BeforeClass
5) @AfterClass 
6) @BeforeTest 
7) @AfterTest
8) @BeforeGroups 
9) @AfterGroups 

What is a test suite?

A test suite is a collection of test cases intended to test a behavior or a set of behaviors of software program.
Running a set of test cases together is call executing a Test Suite.
In testNG, a suite is represented by an xml file. A suite can contain one or more tests and is defined by the

Why do we need test suite?

Test suite is to execute multiple test cases at the same time.

We are using test suite is 

  • TestNG Include and Exclude Methods
  • TestNG Groups Test Methods
  • TestNG DataProvider
  • TestNG Cross Browser Testing
  • TestNG Page Object Model
  • TestNG Listeners and etc etc…

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