Only override native default label if config server default label is not null. Fixes #1184 (#1185)

spring-cloud-config-server/src/main/java/org/springframework/cloud/config/server/environment/NativeEnvironmentRepositoryFactory.java

@@ -34,7 +34,9 @@ public class NativeEnvironmentRepositoryFactory implements EnvironmentRepository
 	@Override
 	public NativeEnvironmentRepository build(NativeEnvironmentProperties environmentProperties) {
 		NativeEnvironmentRepository repository = new NativeEnvironmentRepository(environment, environmentProperties);
-		repository.setDefaultLabel(properties.getDefaultLabel());
+		if(properties.getDefaultLabel() != null) {
+			repository.setDefaultLabel(properties.getDefaultLabel());
+		}
 		return repository;
 	}
 }

spring-cloud-config-server/src/test/java/org/springframework/cloud/config/server/environment/NativeEnvironmentRepositoryFactoryTest.java

@@ -0,0 +1,51 @@
+/*
+ * Copyright 2018 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.cloud.config.server.environment;
+
+import org.junit.Test;
+import org.springframework.cloud.config.server.config.ConfigServerProperties;
+import org.springframework.core.env.StandardEnvironment;
+
+import static org.junit.Assert.assertEquals;
+
+
+/**
+ * @author Ryan Baxter
+ */
+public class NativeEnvironmentRepositoryFactoryTest {
+
+	@Test
+	public void testDefaultLabel() {
+		ConfigServerProperties props = new ConfigServerProperties();
+		props.setDefaultLabel("mylabel");
+		NativeEnvironmentRepositoryFactory factory = new NativeEnvironmentRepositoryFactory(new StandardEnvironment(), props);
+		NativeEnvironmentProperties environmentProperties = new NativeEnvironmentProperties();
+		NativeEnvironmentRepository repo = factory.build(environmentProperties);
+		assertEquals("mylabel", repo.getDefaultLabel());
+
+		factory = new NativeEnvironmentRepositoryFactory(new StandardEnvironment(), props);
+		environmentProperties = new NativeEnvironmentProperties();
+		environmentProperties.setDefaultLabel("mynewlabel");
+		repo = factory.build(environmentProperties);
+		assertEquals("mylabel", repo.getDefaultLabel());
+
+		factory = new NativeEnvironmentRepositoryFactory(new StandardEnvironment(), new ConfigServerProperties());
+		environmentProperties = new NativeEnvironmentProperties();
+		environmentProperties.setDefaultLabel("mynewlabel");
+		repo = factory.build(environmentProperties);
+		assertEquals("mynewlabel", repo.getDefaultLabel());
+	}
+}