ConstructorSample.java

package test.dataprovider;

import org.testng.Assert;
import org.testng.annotations.DataProvider;
import org.testng.annotations.Factory;
import org.testng.annotations.Test;

import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;

public class ConstructorSample {

    public static List<String> all = new ArrayList<>(2);

    private final String s;

    @Factory(dataProvider = "dp")
    public ConstructorSample(String s) {
        this.s = s;
    }

    @DataProvider(name = "dp")
    public static Object[][] createData(Constructor c) {
        Assert.assertEquals(c.getDeclaringClass(), ConstructorSample.class);
        Assert.assertNotNull(c.getAnnotation(Factory.class));
        Assert.assertEquals(c.getParameterTypes().length, 1);
        Assert.assertEquals(c.getParameterTypes()[0], String.class);

        return new Object[][]{{"Cedric"}, {"Alois"}};
    }

    @Test
    public void test() {
        all.add(s);
    }
}