TestNG Exception | TestNG Tutorial

TestNG Exception:

In this post, I will show how to use TestNG Exception (i.e., expectedExceptions) parameter along with the @Test annotation. TestNG provides an option of tracing the exception handling of code.

Firstly, we see a basic program without using TestNG Exception.

Created a java class, say, TestNGException.java and added an error condition in the method testException().

package softwareTestingMaterial;
import org.testng.annotations.Test;
public class TestNGException {

	@Test
	public void testException() {
		System.out.println("SoftwareTestingMaterial.com");
		int i = 1 / 0;	
	}
}

testng.xml:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd">
<suite name="softwaretestingmaterial">
	<test name="testngTest">
		<classes>
			<class name="softwareTestingMaterial.TestNGException" />
		</classes>
	</test>	
</suite>

Console Output:

[TestNG] Running:

SoftwareTestingMaterial.com

===============================================
Default suite
Total tests run: 1, Failures: 1, Skips: 0
===============================================

As you can see from the test results, testException() method was marked as failed by TestNG during execution.

Now let’s see TestNG Exception in action.

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The expected exception to validate while running the below test is mentioned using the expectedExceptions attribute value while using the @Test annotation.

package softwareTestingMaterial;
import org.testng.annotations.Test;
public class TestNGException {
	
	@Test(expectedExceptions = ArithmeticException.class)
	public void testException() {
		System.out.println("SoftwareTestingMaterial.com");
		int i = 1 / 0;	
	}
}

testng.xml:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd">
<suite name="softwaretestingmaterial">
	<test name="testngTest">
		<classes>
			<class name="softwareTestingMaterial.TestNGException" />
		</classes>
	</test>	
</suite>

Console Output:

[TestNG] Running:

SoftwareTestingMaterial.com

===============================================
Default suite
Total tests run: 1, Failures: 0, Skips: 0
===============================================

As you can see from the test results, testException() method was marked as passed by TestNG during execution.

You could find the complete TestNG tutorial here.