How to run the specified testng case by code?

Question

How to run the specified testNG case by code? The following code:

public class TestNGTest {

    @Test
    public void test() {
        System.out.println("test  ########");
    }

    @Test
    public void test2() {
        System.out.println("test2 ************");
    }

    public static void main(String[] args) throws Exception {
        TestNG testSuite = new TestNG();

        testSuite.setTestClasses(new Class[] { TestNGTest.class });
        testSuite.setDefaultSuiteName("setDefaultSuiteName");
        testSuite.setDefaultTestName("setDefaultTestName");
        testSuite.run();
    }
}

This would run both the test cases. How to specifically run "test2" only?

Expected output:

test2 ************

Gautham M · Accepted Answer · 2021-12-13T15:12:44.837

You can use the classes prefixed with Xml to achieve this:

XmlClass xmlClass = new XmlClass(TestNGTest.class.getName());
// now mention the methods to be included. You may use setExcludedMethods depending on the requirement.
XmlInclude method = new XmlInclude("test2");
xmlClass.setIncludedMethods(List.of(method));
// or xmlClass.setExcludedMethods(List.of("test"));

Now create xml suite and xml test:

XmlSuite suite = new XmlSuite();
suite.setName("suite");

XmlTest test = new XmlTest(suite);
// internally, the test method is also added to the suite object
test.setName("sample");
test.setXmlClasses(List.of(xmlClass));

Final create TestNG object:

TestNG t = new TestNG();
t.setXmlSuites(List.of(suite));
t.run();

Note: List.of is a method available only in java 9 or above. If you are using a lower version, then you may use java.util.Arrays.asList

score 0 · Answer 2 · answered Dec 13 '21 at 15:20

You can do that by adding a method interceptor like this:

public class TestNGTest implements IMethodInterceptor {

    @Test
    public void test() {

        System.out.println("test  ########");
    }

    @Test
    public void test2() {

        System.out.println("test2 ************");
    }

    public static void main(String[] args) throws Exception {
        TestNG testSuite = new TestNG();

        testSuite.setTestClasses(new Class[] { TestNGTest.class });
        testSuite.setMethodInterceptor(new TestNGTest());
        testSuite.setDefaultSuiteName("setDefaultSuiteName");
        testSuite.setDefaultTestName("setDefaultTestName");
        testSuite.run();
    }

    @Override
    public List<IMethodInstance> intercept(List<IMethodInstance> methods, ITestContext context) {
        return methods
                .stream()
                .filter(iMethodInstance -> "test2".equals(iMethodInstance.getMethod().getMethodName()))
                .collect(Collectors.toList());
    }
}

How to run the specified testng case by code?

2 Answers2