Add test to reproduce SPR-15271

Author: snicoll

spring-core/src/test/java/org/springframework/core/annotation/AnnotatedElementUtilsTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 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.
@@ -204,6 +204,15 @@ public void getAllAnnotationAttributesOnClassWithMultipleComposedAnnotations() {
 				attributes.get("value"));
 	}
 
+	@Test
+	@Ignore("To be validated by ")
+	public void getAllMergedAnnotationsOnClassWithInterface() throws NoSuchMethodException {
+		Method m = TransactionalServiceImpl.class.getMethod("doIt");
+		Set<Transactional> allMergedAnnotations =
+				getAllMergedAnnotations(m, Transactional.class);
+		assertEquals(1, allMergedAnnotations.size());
+	}
+
 	@Test
 	public void getMergedAnnotationAttributesOnClassWithLocalAnnotation() {
 		Class<?> element = TxConfig.class;
@@ -1272,4 +1281,17 @@ static class SpringAppConfigClass {
 	static class ResourceHolder {
 	}
 
+	interface TransactionalService {
+
+		@Transactional
+		void doIt();
+	}
+
+	class TransactionalServiceImpl implements TransactionalService {
+
+		@Override
+		public void doIt() {
+		}
+	}
+
 }