TESTNG testing code example

Example: what is testng

TESTNG: TestNextGeneration
    -> What is TestNG?
        - TestNG is a UNIT TESTING TOOL.
        - It was inspired by JUNIT, but a little bit more advanced than JUNIT.
        - TESTNG helps us create certain testing flow/structure using 
        its ANNOTATIONS.
-->  some of the annotation from TestNG are
    @Test
    @BeforeSuite
    @AfterSuite
    @BeforeTest
    @AfterTest
    @BeforeGroups
    @AfterGroups
    @BeforeClass
    @AfterClass
    @BeforeMethod
    @AfterMethod