import org.openqa.selenium.support.FindBy;
import org.primefaces.extensions.selenium.AbstractPrimePage;
import org.primefaces.extensions.selenium.component.InputText;
import org.primefaces.extensions.selenium.component.SelectOneMenu;

public class IndexPage extends AbstractPrimePage {

    @FindBy(id = "form:manufacturer")
    private SelectOneMenu manufacturer;

    @FindBy(id = "form:car")
    private InputText car;

    public SelectOneMenu getManufacturer() {
        return manufacturer;
    }

    public InputText getCar() {
        return car;
    }

    @Override
    public String getLocation() {
        return "index.xhtml";
    }
}

import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;
import org.primefaces.extensions.selenium.AbstractPrimePageTest;

public class IndexPageTest extends AbstractPrimePageTest {

    @Inject
    private AnotherPage another;

    @Test
    public void myFirstTest(IndexPage index) throws InterruptedException {
        // right page?
        Assertions.assertTrue(index.isAt());
        assertNotDisplayed(index.getCar());

        // just to follow the browser with a human eye for the showcase :D - not need in your real tests
        Thread.sleep(2000);

        // select manufacturer
        assertDisplayed(index.getManufacturer());
        index.getManufacturer().select("BMW");
        Assertions.assertTrue(index.getManufacturer().isSelected("BMW"));

        // just to follow the browser with a human eye for the showcase :D - not need in your real tests
        Thread.sleep(2000);

        // type car
        assertDisplayed(index.getCar());
        index.getCar().setValue("E30 M3");

        // just to follow the browser with a human eye for the showcase :D - not need in your real tests
        Thread.sleep(2000);

        another.goTo();
        
        ...
    }
}