import static org.springframework.boot.test.context.SpringBootTest.WebEnvironment.RANDOM_PORT;

import org.junit.runner.RunWith;
import org.openqa.selenium.remote.RemoteWebDriver;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.boot.web.server.LocalServerPort;
import org.springframework.test.context.junit4.SpringRunner;

@RunWith(SpringRunner.class)
@SpringBootTest(webEnvironment = RANDOM_PORT)
public class TestClass
{
    @Autowired
    private RemoteWebDriver embeddedSeleniumRemoteWebDriver;

    @LocalServerPort
    private int port;

    @Test
    public void testSomething()
    {
        String url = "http://" + ApplicationIpDetector.detect() + ":" + Integer.toString(port);
        embeddedSeleniumRemoteWebDriver.get(url);

        // ...
    }
}