Polish contribution

Closes gh-6540

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/mvc/HealthMvcEndpoint.java

@@ -18,7 +18,6 @@ package org.springframework.boot.actuate.endpoint.mvc;
 
 import java.security.Principal;
 import java.util.Arrays;
-import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -190,10 +189,7 @@ public class HealthMvcEndpoint extends AbstractEndpointMvcAdapter<HealthEndpoint
 		if (isSpringSecurityAuthentication(principal)) {
 			Authentication authentication = (Authentication) principal;
 			List<String> roles = Arrays.asList(StringUtils.trimArrayElements(StringUtils
-					.commaDelimitedListToStringArray(this.roleResolver.getProperty("roles"))));
-			if (roles.isEmpty()) {
-				roles = Collections.singletonList("ROLE_ADMIN");
-			}
+					.commaDelimitedListToStringArray(this.roleResolver.getProperty("roles", "ROLE_ADMIN"))));
 			for (GrantedAuthority authority : authentication.getAuthorities()) {
 				String name = authority.getAuthority();
 				for (String role : roles) {

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/mvc/HealthMvcEndpointTests.java

@@ -60,13 +60,17 @@ public class HealthMvcEndpointTests {
 
 	private MockEnvironment environment;
 
-	private UsernamePasswordAuthenticationToken user = new UsernamePasswordAuthenticationToken(
-			"user", "password",
-			AuthorityUtils.commaSeparatedStringToAuthorityList("ROLE_USER"));
+	private UsernamePasswordAuthenticationToken user = createAuthenticationToken("ROLE_USER");
 
-	private UsernamePasswordAuthenticationToken admin = new UsernamePasswordAuthenticationToken(
-			"user", "password",
-			AuthorityUtils.commaSeparatedStringToAuthorityList("ROLE_ADMIN"));
+	private UsernamePasswordAuthenticationToken admin = createAuthenticationToken("ROLE_ADMIN");
+
+	private UsernamePasswordAuthenticationToken hero = createAuthenticationToken("ROLE_HERO");
+
+	private UsernamePasswordAuthenticationToken createAuthenticationToken(String authority) {
+		return new UsernamePasswordAuthenticationToken(
+				"user", "password",
+				AuthorityUtils.commaSeparatedStringToAuthorityList(authority));
+	}
 
 	@Before
 	public void init() {
@@ -147,17 +151,26 @@ public class HealthMvcEndpointTests {
 
 	@Test
 	public void secureCustomRole() {
-		this.mvc = new HealthMvcEndpoint(this.endpoint, false);
-		this.mvc.setEnvironment(this.environment);
 		this.environment.getPropertySources().addLast(SECURITY_ROLES);
 		given(this.endpoint.invoke())
 				.willReturn(new Health.Builder().up().withDetail("foo", "bar").build());
-		Object result = this.mvc.invoke(this.user);
+		Object result = this.mvc.invoke(this.hero);
 		assertThat(result instanceof Health).isTrue();
 		assertThat(((Health) result).getStatus() == Status.UP).isTrue();
 		assertThat(((Health) result).getDetails().get("foo")).isEqualTo("bar");
 	}
 
+	@Test
+	public void secureCustomRoleNoAccess() {
+		this.environment.getPropertySources().addLast(SECURITY_ROLES);
+		given(this.endpoint.invoke())
+				.willReturn(new Health.Builder().up().withDetail("foo", "bar").build());
+		Object result = this.mvc.invoke(this.admin);
+		assertThat(result instanceof Health).isTrue();
+		assertThat(((Health) result).getStatus() == Status.UP).isTrue();
+		assertThat(((Health) result).getDetails().get("foo")).isNull();
+	}
+
 	@Test
 	public void healthIsCached() {
 		given(this.endpoint.getTimeToLive()).willReturn(10000L);