Sample1284.java

package test.listeners.github1284;

import org.testng.Assert;
import org.testng.annotations.Test;
import org.testng.collections.Lists;

import java.util.List;

public class Sample1284 {
    @Test
    public void testWithNoListener() {
        Assert.assertNull(Listener1284.getInstance());
        Assert.assertEquals(Listener1284.testList.size(), 0);
    }

    @Test
    public void testWithListener() {
        Assert.assertNotNull(Listener1284.getInstance());
        Assert.assertEquals(Listener1284.testList.size(), 1);
        Assert.assertEquals(Listener1284.testList.get(0), Sample1284.class.getName() + " - Before Invocation");
    }

    @Test
    public void testWithChildListener() {
        Assert.assertNotNull(Listener1284.getInstance());
        Assert.assertEquals(Listener1284.testList.size(), 3);

        String beforeInvocation = Sample1284.class.getName() + " - Before Invocation";
        String afterInvocation = Sample1284.class.getName() + " - After Invocation";
        List<String> expectedList = Lists.newArrayList(beforeInvocation, afterInvocation, beforeInvocation);

        Assert.assertEquals(Listener1284.testList, expectedList);
    }

}