Demonstrate use of @configuration as meta-annotation

Issue: SPR-9090

Author: cbeams

org.springframework.context/src/test/java/org/springframework/context/annotation/configuration/ConfigurationMetaAnnotationTests.java

@@ -0,0 +1,72 @@
+/*
+ * Copyright 2002-2012 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.context.annotation.configuration;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+import org.junit.Test;
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+import test.beans.TestBean;
+
+import static org.hamcrest.CoreMatchers.*;
+import static org.junit.Assert.*;
+
+/**
+ * Ensures that @Configuration is supported properly as a meta-annotation.
+ *
+ * @author Chris Beams
+ */
+public class ConfigurationMetaAnnotationTests {
+
+	@Test
+	public void customConfigurationStereotype() {
+		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();
+		ctx.register(Config.class);
+		ctx.refresh();
+		assertThat(ctx.containsBean("customName"), is(true));
+		TestBean a = ctx.getBean("a", TestBean.class);
+		TestBean b = ctx.getBean("b", TestBean.class);
+		assertThat(b, sameInstance(a.getSpouse()));
+	}
+
+
+	@TestConfiguration("customName")
+	static class Config {
+		@Bean
+		public TestBean a() {
+			TestBean a = new TestBean();
+			a.setSpouse(b());
+			return a;
+		}
+
+		@Bean
+		public TestBean b() {
+			return new TestBean();
+		}
+	}
+
+
+	@Configuration
+	@Retention(RetentionPolicy.RUNTIME)
+	public @interface TestConfiguration {
+		String value() default "";
+	}
+}