Read it out for TESTNG before going for an iterview

How to run a group of test cases using TestNG?

TestNG allows you to perform sophisticated groupings of test methods. Not only can you declare that methods belong to groups, but you can also specify groups that contain other groups. Then TestNG can be invoked and asked to include a certain set of groups (or regular expressions) while excluding another set.  This gives you maximum flexibility in how you partition your tests and doesn’t require you to recompile anything if you want to run two different sets of tests back to back.

Groups are specified in your testng.xml file and can be found either under the <test> or <suite> tag. Groups specified in the <suite> tag apply to all the <test> tags underneath.

@Test (groups = { "smokeTest", "functionalTest" })

public void loginTest(){

System.out.println("Logged in successfully");

}

 How to create Group of Groups in TestNG?

Groups can also include other groups. These groups are called MetaGroups. For example, you might want to define a group all that includes smokeTest and functionalTest. Let’s modify our testng.xml file as follows:

<groups>

   <define name="all">

                 <include name="smokeTest"/>

                 <include name="functionalTest"/>

   </define>

   <run>

         <include name="all" />

   </run>       

</groups>

How to run test cases in parallel using TestNG?

we can use “parallel” attribute in testng.xml to accomplish parallel test execution in TestNG

The parallel attribute of suite tag can accept four values:

tests – All the test cases inside <test> tag of testng.xml file will run parallel
classes – All the test cases inside a java class will run parallel
methods – All the methods with @Test annotation will execute parallelinstance – Test cases in same instance will execute parallel but two methods of two different instances will run in different thread.

<suite name="softwaretestingmaterial" parallel="methods">

How to exclude a particular test method from a test case execution? 

By adding the exclude tag in the testng.xml

<classes>

  <class name="TestCaseName">

     <methods>

       <exclude name="TestMethodNameToExclude"/>

     </methods>

  </class>     

</classes>

How to exclude a particular test group from a test case execution? 

By adding the exclude tag in the testng.xml

<groups>

    <run>

                 <exclude name="TestGroupNameToExclude"/>

    </run>     

</groups>

 How to disable a test case in TestNG ?

To disable the test case we use the parameter enabled = false to the @Test annotation.

@Test(enabled = false)

How to skip a @Test method from execution in TestNG?

By using throw new SkipException()

Once SkipException() thrown, remaining part of that test method will not be executed and control will goes directly to next test method execution.

throw new SkipException("Skipping - This is not ready for testing ");

 How to Ignore a test case in TestNG?

To ignore the test case we use the parameter enabled = false to the @Test annotation.

@Test(enabled = false)

How to write regular expression In testng.xml file to search @Test methods containing “smoke” keyword.

Regular expression to find @Test methods containing keyword “smoke” is as mentioned below.

<methods>

     <include name=".*smoke.*"/>

</methods>