의존성 추가

<dependency>
   <groupId>org.seleniumhq.selenium</groupId>
   <artifactId>htmlunit-driver</artifactId>
   <scope>test</scope>
</dependency>
<dependency>
   <groupId>net.sourceforge.htmlunit</groupId>
   <artifactId>htmlunit</artifactId>
   <scope>test</scope>
</dependency>
@RunWith(SpringRunner.class)
@WebMvcTest(SampleController.class)
public class SampleControllerTest {

	@Autowired
	WebClient webClient; // htmlUnit

	@Test
	public void hello() throws Exception {
		HtmlPage page = webClient.getPage("/hello");
		HtmlHeading1 h1 = page.getFirstByXPath("//h1");
		assertThat(h1.getTextContent()).isEqualToIgnoringCase("cmlee");
	}
}