Building Test Suites in TestNG

 ✅ What is a Test Suite in TestNG?

A TestNG test suite is a collection of tests that are executed together. It allows you to:


Run multiple test classes.


Set test execution order.


Pass parameters to tests.


Include/exclude groups of tests.


🛠️ Steps to Build a Test Suite in TestNG

Step 1: Create Your Test Classes

java

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// File: TestClass1.java

import org.testng.annotations.Test;


public class TestClass1 {

    @Test

    public void testMethod1() {

        System.out.println("TestClass1 - testMethod1");

    }

}

java

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// File: TestClass2.java

import org.testng.annotations.Test;


public class TestClass2 {

    @Test

    public void testMethod2() {

        System.out.println("TestClass2 - testMethod2");

    }

}

Step 2: Create the testng.xml File

xml

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<!DOCTYPE suite SYSTEM "https://testng.org/testng-1.0.dtd" >

<suite name="MyTestSuite">

    <test name="SampleTests">

        <classes>

            <class name="TestClass1"/>

            <class name="TestClass2"/>

        </classes>

    </test>

</suite>

<suite>: Defines the suite.


<test>: Represents a group of test classes.


<classes> and <class>: List of classes containing test methods.


Step 3: Run the Test Suite

You can run the suite using:


Command Line (Maven):


sh

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mvn test -DsuiteXmlFile=testng.xml

From IDE (like IntelliJ or Eclipse):


Right-click on the testng.xml file.


Click Run 'testng.xml'.


🔧 Advanced Features in TestNG Suites

1. Grouping Tests

java

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@Test(groups = "smoke")

public void testLogin() {}


@Test(groups = "regression")

public void testCheckout() {}

In testng.xml:


xml

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<groups>

    <run>

        <include name="smoke"/>

    </run>

</groups>

2. Parameterization

java

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@Test

@Parameters("browser")

public void testLogin(String browser) {

    System.out.println("Testing on browser: " + browser);

}

In testng.xml:


xml

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<parameter name="browser" value="chrome"/>

3. Parallel Execution

xml

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<suite name="ParallelSuite" parallel="classes" thread-count="2">

📌 Summary

Concept Purpose

testng.xml Defines the structure of the test suite

<suite> Groups tests into a suite

<test> Groups test classes

<classes> Lists the test classes

Groups Run subsets like smoke, regression

Parameters Pass values dynamically to tests

Parallel Execution Run tests faster using threads

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