TestNG Rule Support

About

This is a prototype of a Rule (like in JUnit Rules) implementation for TestNG.

You need to annotate your test class with @Listeners(RulesListener.class) to activate rule support. Then any public field of the class of type IHookable or ITestListener will be executed at the appropriate time. Multiple IHookables will be chained.

Example

Consider the following test:

@Listeners(RulesListener.class)
public class RuleTest {
    private int counter = 0;

    @TestNGRule
    public final IHookable incrementRule = new IHookable() {

        @Override
        public void run(IHookCallBack callBack, ITestResult testResult) {
            counter += 2;
            callBack.runTestMethod(testResult);
        }
    };

    @Test
    public void checkItWorked() {
        System.out.println("Test");
        assertEquals(counter, 2);
    }
}

The rule will then be executed (like an IHookable) instead of each method.

In src/test there is also a SpringRule which works like using the AbstractTestNGSpringContextTests as a base class, but using composition (with Rules) instead of inheritance. An class using this rule is the SpringRuleTest.

I also implemented the ConcurrentRule from ConcurrentRule.

TODO

• Implement classes implementing ITestListener for some common usecases like before/afterClass, ...
• Make other ITestNGListeners possible
• Add DependsOn attribute to the Rule annotation to make ordering possible