Add integration test for gh-24110

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

@@ -488,6 +488,20 @@ public class AnnotatedElementUtilsTests {
 		assertTrue(isAnnotated(element, name));
 	}
 
+	@Test
+	public void getMergedAnnotationWithImplicitAliasesWithDefaultsInMetaAnnotationOnComposedAnnotation() {
+		Class<?> element = ImplicitAliasesWithDefaultsClass.class;
+		String name = AliasesWithDefaults.class.getName();
+		AliasesWithDefaults annotation = getMergedAnnotation(element, AliasesWithDefaults.class);
+
+		assertNotNull("Should find @AliasesWithDefaults on " + element.getSimpleName(), annotation);
+		assertEquals("a1", "ImplicitAliasesWithDefaults", annotation.a1());
+		assertEquals("a2", "ImplicitAliasesWithDefaults", annotation.a2());
+
+		// Verify contracts between utility methods:
+		assertTrue(isAnnotated(element, name));
+	}
+
 	@Test
 	public void getMergedAnnotationAttributesWithInvalidConventionBasedComposedAnnotation() {
 		Class<?> element = InvalidConventionBasedComposedContextConfigClass.class;
@@ -958,7 +972,6 @@ public class AnnotatedElementUtilsTests {
 		String[] xmlConfigFiles() default {};
 	}
 
-
 	@ContextConfig
 	@Retention(RetentionPolicy.RUNTIME)
 	@interface AliasedComposedContextConfig {
@@ -999,6 +1012,27 @@ public class AnnotatedElementUtilsTests {
 	@interface ComposedImplicitAliasesContextConfig {
 	}
 
+	@Retention(RetentionPolicy.RUNTIME)
+	@interface AliasesWithDefaults {
+
+		@AliasFor("a2")
+		String a1() default "AliasesWithDefaults";
+
+		@AliasFor("a1")
+		String a2() default "AliasesWithDefaults";
+	}
+
+	@Retention(RetentionPolicy.RUNTIME)
+	@AliasesWithDefaults
+	@interface ImplicitAliasesWithDefaults {
+
+		@AliasFor(annotation = AliasesWithDefaults.class, attribute = "a1")
+		String b1() default "ImplicitAliasesWithDefaults";
+
+		@AliasFor(annotation = AliasesWithDefaults.class, attribute = "a2")
+		String b2() default "ImplicitAliasesWithDefaults";
+	}
+
 	@ImplicitAliasesContextConfig
 	@Retention(RetentionPolicy.RUNTIME)
 	@interface TransitiveImplicitAliasesContextConfig {
@@ -1296,6 +1330,10 @@ public class AnnotatedElementUtilsTests {
 	static class ImplicitAliasesContextConfigClass3 {
 	}
 
+	@ImplicitAliasesWithDefaults
+	static class ImplicitAliasesWithDefaultsClass {
+	}
+
 	@TransitiveImplicitAliasesContextConfig(groovy = "test.groovy")
 	static class TransitiveImplicitAliasesContextConfigClass {
 	}