Test for NPE when calling getClass() in RefreshScope

fixes gh-297

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

@@ -0,0 +1,85 @@
+/*
+ * 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.scope.refresh;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.context.PropertyPlaceholderAutoConfiguration;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.cloud.autoconfigure.RefreshAutoConfiguration;
+import org.springframework.cloud.context.config.annotation.RefreshScope;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(classes = {RefreshScopeNullBeanIntegrationTests.TestConfiguration.class})
+public class RefreshScopeNullBeanIntegrationTests {
+
+	@Autowired
+	private MyCustomComponent myCustomComponent;
+
+	@Autowired
+	private org.springframework.cloud.context.scope.refresh.RefreshScope scope;
+
+	@Test
+	@DirtiesContext
+	public void testRefreshBean() {
+		assertThat(this.myCustomComponent).isNotNull();
+		// ...and then refresh, so the bean is re-initialized:
+		// this.scope.refreshAll();
+	}
+
+	protected static class OptionalService { }
+
+	public static class MyCustomComponent {
+
+		private final OptionalService optionalService;
+
+		public MyCustomComponent(OptionalService optionalService) {
+			this.optionalService = optionalService;
+		}
+	}
+
+	@Configuration
+	protected static class OptionalConfiguration {
+
+		@Bean
+		@RefreshScope
+		public OptionalService service() {
+			return null;
+		}
+	}
+
+	@Configuration
+	@Import({ RefreshAutoConfiguration.class, PropertyPlaceholderAutoConfiguration.class, OptionalConfiguration.class })
+	protected static class TestConfiguration {
+
+		@Autowired(required = false)
+		private OptionalService optionalService;
+
+		@Bean
+		public MyCustomComponent myCustomComponent() {
+			return new MyCustomComponent(optionalService);
+		}
+	}
+
+}