Makes management tags mutable.

fixes gh-415

spring-cloud-consul-discovery/src/main/java/org/springframework/cloud/consul/discovery/ConsulDiscoveryProperties.java

@@ -52,7 +52,7 @@ public class ConsulDiscoveryProperties {
 	private boolean enabled = true;
 
 	/** Tags to use when registering management service */
-	private List<String> managementTags = Arrays.asList(MANAGEMENT);
+	private List<String> managementTags = new ArrayList<>();
 
 	/** Alternate server path to invoke for health checking */
 	private String healthCheckPath = "/actuator/health";
@@ -165,9 +165,12 @@ public class ConsulDiscoveryProperties {
 	private Boolean healthCheckTlsSkipVerify;
 
 	@SuppressWarnings("unused")
-	private ConsulDiscoveryProperties() {}
+	private ConsulDiscoveryProperties() {
+		this.managementTags.add(MANAGEMENT);
+	}
 
 	public ConsulDiscoveryProperties(InetUtils inetUtils) {
+		this();
 		this.hostInfo = inetUtils.findFirstNonLoopbackHostInfo();
 		this.ipAddress = this.hostInfo.getIpAddress();
 		this.hostname = this.hostInfo.getHostname();

spring-cloud-consul-discovery/src/test/java/org/springframework/cloud/consul/discovery/ConsulDiscoveryPropertiesTests.java

@@ -1,13 +1,15 @@
 package org.springframework.cloud.consul.discovery;
 
-import org.junit.Before;
-import org.junit.Test;
-import org.springframework.cloud.commons.util.InetUtils;
-import org.springframework.cloud.commons.util.InetUtilsProperties;
-
 import java.util.Collections;
 import java.util.Map;
 
+import org.junit.Before;
+import org.junit.Test;
+
+import org.springframework.cloud.commons.util.InetUtils;
+import org.springframework.cloud.commons.util.InetUtilsProperties;
+
+import static org.assertj.core.api.Assertions.assertThat;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNull;
 
@@ -23,7 +25,7 @@ public class ConsulDiscoveryPropertiesTests {
     private Map<String, String> datacenters = Collections.singletonMap(SERVICE_NAME_IN_MAP, MAP_DC);
 
     @Before
-    public void setUp() throws Exception {
+    public void setUp() {
         properties = new ConsulDiscoveryProperties(new InetUtils(new InetUtilsProperties()));
         properties.setDefaultQueryTag(DEFAULT_TAG);
         properties.setServerListQueryTags(serverListQueryTags);
@@ -31,29 +33,36 @@ public class ConsulDiscoveryPropertiesTests {
     }
 
     @Test
-    public void testReturnsNullWhenNoDefaultAndNotInMap() throws Exception {
+    public void testReturnsNullWhenNoDefaultAndNotInMap() {
         properties.setDefaultQueryTag(null);
 
         assertNull(properties.getQueryTagForService(SERVICE_NAME_NOT_IN_MAP));
     }
 
     @Test
-    public void testGetTagReturnsDefaultWhenNotInMap() throws Exception {
+    public void testGetTagReturnsDefaultWhenNotInMap() {
         assertEquals(DEFAULT_TAG, properties.getQueryTagForService(SERVICE_NAME_NOT_IN_MAP));
     }
 
     @Test
-    public void testGetTagReturnsMapValueWhenInMap() throws Exception {
+    public void testGetTagReturnsMapValueWhenInMap() {
         assertEquals(MAP_TAG, properties.getQueryTagForService(SERVICE_NAME_IN_MAP));
     }
 
     @Test
-    public void testGetDcReturnsNullWhenNotInMap() throws Exception {
+    public void testGetDcReturnsNullWhenNotInMap() {
         assertNull(properties.getDatacenters().get(SERVICE_NAME_NOT_IN_MAP));
     }
 
     @Test
-    public void testGetDcReturnsMapValueWhenInMap() throws Exception {
+    public void testGetDcReturnsMapValueWhenInMap() {
         assertEquals(MAP_DC, properties.getDatacenters().get(SERVICE_NAME_IN_MAP));
     }
+
+    @Test
+    public void testAddManagementTag() {
+        properties.getManagementTags().add("newTag");
+        assertThat(properties.getManagementTags())
+                .containsOnly(ConsulDiscoveryProperties.MANAGEMENT, "newTag");
+    }
 }