Destroy beans before initializing them

Fixes gh-268

spring-cloud-context/src/test/java/org/springframework/cloud/context/properties/ConfigurationPropertiesRebinderLifecycleIntegrationTests.java

@@ -0,0 +1,119 @@
+/*
+ * Copyright 2006-2017 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.properties;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import org.springframework.beans.factory.DisposableBean;
+import org.springframework.beans.factory.InitializingBean;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.context.PropertyPlaceholderAutoConfiguration;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.util.TestPropertyValues;
+import org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration;
+import org.springframework.cloud.autoconfigure.RefreshAutoConfiguration;
+import org.springframework.cloud.context.properties.ConfigurationPropertiesRebinderLifecycleIntegrationTests.TestConfiguration;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+import org.springframework.core.env.ConfigurableEnvironment;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.Assert.assertEquals;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(classes = TestConfiguration.class)
+public class ConfigurationPropertiesRebinderLifecycleIntegrationTests {
+
+	@Autowired
+	private TestProperties properties;
+
+	@Autowired
+	private ConfigurationPropertiesRebinder rebinder;
+
+	@Autowired
+	private ConfigurableEnvironment environment;
+
+	@Test
+	@DirtiesContext
+	public void testRefresh() throws Exception {
+		assertEquals(1, this.properties.getCount());
+		assertEquals("Hello scope!", this.properties.getMessage());
+		// Change the dynamic property source...
+		TestPropertyValues.of("message:Foo").applyTo(this.environment);
+		// ...and then refresh, so the bean is re-initialized:
+		this.rebinder.rebind();
+		assertEquals("Foo", this.properties.getMessage());
+		assertEquals(2, this.properties.getCount());
+	}
+
+	@Configuration
+	@EnableConfigurationProperties
+	@Import({ RefreshConfiguration.RebinderConfiguration.class,
+			PropertyPlaceholderAutoConfiguration.class })
+	protected static class TestConfiguration {
+
+		@Bean
+		protected TestProperties properties() {
+			return new TestProperties();
+		}
+
+	}
+
+	// Hack out a protected inner class for testing
+	protected static class RefreshConfiguration extends RefreshAutoConfiguration {
+		@Configuration
+		protected static class RebinderConfiguration
+				extends ConfigurationPropertiesRebinderAutoConfiguration {
+
+		}
+	}
+
+	@ConfigurationProperties
+	protected static class TestProperties implements DisposableBean, InitializingBean {
+		private String message;
+		private int count = 0;
+
+		public int getCount() {
+			return this.count;
+		}
+
+		public String getMessage() {
+			return this.message;
+		}
+
+		public void setMessage(String message) {
+			this.message = message;
+		}
+
+		@Override
+		public void afterPropertiesSet() throws Exception {
+			assertThat(this.message).isNotEmpty();
+		}
+
+		@Override
+		public void destroy() throws Exception {
+			this.message = "";
+			this.count++;
+		}
+	}
+
+}