TestNG

Multiple Test in TestNG.xml

To Run multiple test Using testng.xml please refer: https://www.mkyong.com/unittest/testng-tutorial-5-suite-test/

Run Test on environment

To run test verifying the operating system we can use this type segment.

in java file

@Test
public class Test1 {
  @Test(groups = { "windows.checkintest" }) 
  public void testWindowsOnly() {
  }

  @Test(groups = {"linux.checkintest"} )
  public void testLinuxOnly() {
  }

  @Test(groups = { "windows.functest" )
  public void testWindowsToo() {
  }
}

in xml

<test name="Test1">

<groups>

<run>

<include name="windows.*"/>

</run>

</groups>

<classes>

<class name="example1.Test1"/>

</classes>

</test>

More refer : http://testng.org/doc/documentation-main.html

Test Dependency

Creating the dependency among @test use 
@Test(dependsOnMethods = { "testName" })

For more refer:

        https://www.tutorialspoint.com/testng/testng_dependency_test.htm
        https://dzone.com/articles/testng-depedency-test-%E2%80%93