Add test for serialization ID in RefreshScope

It should be unique and deterministic by default.

spring-cloud-context/src/test/java/org/springframework/cloud/context/scope/refresh/RefreshScopeSerializationTests.java

@@ -0,0 +1,80 @@
+/*
+ * Copyright 2013-2015 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.context.scope.refresh;
+
+import org.junit.Test;
+import org.springframework.beans.factory.support.DefaultListableBeanFactory;
+import org.springframework.boot.builder.SpringApplicationBuilder;
+import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+import static org.hamcrest.CoreMatchers.equalTo;
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.CoreMatchers.not;
+import static org.hamcrest.CoreMatchers.notNullValue;
+import static org.junit.Assert.assertThat;
+
+/**
+ * @author Dave Syer
+ */
+public class RefreshScopeSerializationTests {
+
+	@Test
+	public void defaultApplicationContextId() throws Exception {
+		ConfigurableApplicationContext context = new SpringApplicationBuilder(
+				TestConfiguration.class).web(false).run();
+		assertThat(context.getId(), is(equalTo("application")));
+	}
+
+	@Test
+	public void serializationIdReproducible() throws Exception {
+		String first = getBeanFactory().getSerializationId();
+		String second = getBeanFactory().getSerializationId();
+		assertThat(first, is(notNullValue()));
+		assertThat(first, is(not(equalTo("application"))));
+		assertThat(first, is(equalTo(second)));
+	}
+
+	private DefaultListableBeanFactory getBeanFactory() {
+		ConfigurableApplicationContext context = new SpringApplicationBuilder(
+				TestConfiguration.class).web(false).run();
+		DefaultListableBeanFactory factory = (DefaultListableBeanFactory) context
+				.getAutowireCapableBeanFactory();
+		return factory;
+	}
+
+	@Configuration
+	protected static class TestConfiguration {
+
+		@Bean
+		public RefreshScope refreshScope() {
+			return new RefreshScope();
+		}
+
+		@Bean
+		@org.springframework.cloud.context.config.annotation.RefreshScope
+		public TestBean testBean() {
+			return new TestBean();
+		}
+
+	}
+
+	protected static class TestBean {
+
+	}
+}