Polish LDAP Test to Confirm Authenticated

This commit updates a test that confirms the
users is successfully authenticated. It uses
SecurityMockMvcResultMatchers to check the
SecurityContextHolder.

It further updates one of the assertions which
was working only when the resulting JSON was malformed.

Author: jzheaux

security/security-ldap/src/test/java/com/example/security/ldap/SecurityLdapApplicationTests.java

@@ -24,8 +24,9 @@
 import org.springframework.test.web.servlet.MockMvc;
 
 import static org.springframework.security.test.web.servlet.request.SecurityMockMvcRequestPostProcessors.httpBasic;
+import static org.springframework.security.test.web.servlet.response.SecurityMockMvcResultMatchers.authenticated;
 import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
-import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
 
 @SpringBootTest
@@ -40,7 +41,8 @@ void rootWhenAuthenticatedThenSaysHelloUser() throws Exception {
 		// @formatter:off
 		this.mvc.perform(get("/")
 						.with(httpBasic("user", "password")))
-				.andExpect(content().string("Hello, user!"));
+				.andExpect(authenticated().withUsername("user"))
+				.andExpect(jsonPath("$").value("Hello, user!"));
 		// @formatter:on
 	}