Ensure fix for gh-28012 is actually tested

In 3ec612a, I accidentally removed tests that verified support for
non-synthesizable merged annotations for recursive annotations in
Kotlin.

This commit reinstates those non-synthesizable tests while retaining
the synthesizable tests.

Author: sbrannen

spring-core/src/test/kotlin/org/springframework/core/annotation/Filter.kt

@@ -24,12 +24,8 @@ package org.springframework.core.annotation
 @Retention(AnnotationRetention.RUNTIME)
 public annotation class Filter(
 
-	@get:AliasFor("name")
 	val value: String = "",
 
-	@get:AliasFor("value")
-	val name: String = "",
-
 	val and: Filters = Filters()
 
 )

spring-core/src/test/kotlin/org/springframework/core/annotation/KotlinMergedAnnotationsTests.kt

@@ -41,6 +41,34 @@ class KotlinMergedAnnotationsTests {
 		val mergedAnnotation = MergedAnnotation.from(method.getAnnotation(Person::class.java))
 		assertThat(mergedAnnotation).isNotNull();
 
+		// NON-Synthesized Annotations
+		val jane = mergedAnnotation.synthesize()
+		assertThat(jane).isNotInstanceOf(SynthesizedAnnotation::class.java)
+		assertThat(jane.name).isEqualTo("jane")
+		val synthesizedFriends = jane.friends
+		assertThat(synthesizedFriends).hasSize(2)
+
+		val john = synthesizedFriends[0]
+		assertThat(john).isNotInstanceOf(SynthesizedAnnotation::class.java)
+		assertThat(john.name).isEqualTo("john")
+
+		val sally = synthesizedFriends[1]
+		assertThat(sally).isNotInstanceOf(SynthesizedAnnotation::class.java)
+		assertThat(sally.name).isEqualTo("sally")
+	}
+
+	@Test  // gh-28012
+	fun recursiveAnnotationWithAttributeAliases() {
+		val method = javaClass.getMethod("synthesizablePersonMethod")
+
+		// MergedAnnotations
+		val mergedAnnotations = MergedAnnotations.from(method)
+		assertThat(mergedAnnotations.isPresent(SynthesizablePerson::class.java)).isTrue();
+
+		// MergedAnnotation
+		val mergedAnnotation = MergedAnnotation.from(method.getAnnotation(SynthesizablePerson::class.java))
+		assertThat(mergedAnnotation).isNotNull();
+
 		// Synthesized Annotations
 		val jane = mergedAnnotation.synthesize()
 		assertThat(jane).isInstanceOf(SynthesizedAnnotation::class.java)
@@ -72,6 +100,36 @@ class KotlinMergedAnnotationsTests {
 		val mergedAnnotation = MergedAnnotation.from(method.getAnnotation(Filter::class.java))
 		assertThat(mergedAnnotation).isNotNull();
 
+		// NON-Synthesized Annotations
+		val fooFilter = mergedAnnotation.synthesize()
+		assertThat(fooFilter).isNotInstanceOf(SynthesizedAnnotation::class.java)
+		assertThat(fooFilter.value).isEqualTo("foo")
+		val filters = fooFilter.and
+		assertThat(filters.value).hasSize(2)
+
+		val barFilter = filters.value[0]
+		assertThat(barFilter).isNotInstanceOf(SynthesizedAnnotation::class.java)
+		assertThat(barFilter.value).isEqualTo("bar")
+		assertThat(barFilter.and.value).isEmpty()
+
+		val bazFilter = filters.value[1]
+		assertThat(bazFilter).isNotInstanceOf(SynthesizedAnnotation::class.java)
+		assertThat(bazFilter.value).isEqualTo("baz")
+		assertThat(bazFilter.and.value).isEmpty()
+	}
+
+	@Test  // gh-28012
+	fun recursiveNestedAnnotationWithAttributeAliases() {
+		val method = javaClass.getMethod("synthesizableFilterMethod")
+
+		// MergedAnnotations
+		val mergedAnnotations = MergedAnnotations.from(method)
+		assertThat(mergedAnnotations.isPresent(SynthesizableFilter::class.java)).isTrue();
+
+		// MergedAnnotation
+		val mergedAnnotation = MergedAnnotation.from(method.getAnnotation(SynthesizableFilter::class.java))
+		assertThat(mergedAnnotation).isNotNull();
+
 		// Synthesized Annotations
 		val fooFilter = mergedAnnotation.synthesize()
 		assertThat(fooFilter).isInstanceOf(SynthesizedAnnotation::class.java)
@@ -94,12 +152,20 @@ class KotlinMergedAnnotationsTests {
 	}
 
 
-	@Person("jane", friends = [Person("john"), Person("sally")])
+	@Person(name = "jane", friends = [Person(name = "john"), Person(name = "sally")])
 	fun personMethod() {
 	}
 
+	@SynthesizablePerson(name = "jane", friends = [SynthesizablePerson(name = "john"), SynthesizablePerson(name = "sally")])
+	fun synthesizablePersonMethod() {
+	}
+
 	@Filter("foo", and = Filters(Filter("bar"), Filter("baz")))
 	fun filterMethod() {
 	}
 
+	@SynthesizableFilter("foo", and = SynthesizableFilters(SynthesizableFilter("bar"), SynthesizableFilter("baz")))
+	fun synthesizableFilterMethod() {
+	}
+
 }

spring-core/src/test/kotlin/org/springframework/core/annotation/Person.kt

@@ -24,10 +24,6 @@ package org.springframework.core.annotation
 @Retention(AnnotationRetention.RUNTIME)
 public annotation class Person(
 
-	@get:AliasFor("name")
-	val value: String = "",
-
-	@get:AliasFor("value")
 	val name: String = "",
 
 	vararg val friends: Person = []

spring-core/src/test/kotlin/org/springframework/core/annotation/SynthesizableFilter.kt

@@ -0,0 +1,35 @@
+/*
+ * Copyright 2002-2022 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
+ *
+ *      https://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.core.annotation
+
+/**
+ * @author Sam Brannen
+ * @since 5.3.16
+ */
+@Target(AnnotationTarget.FUNCTION)
+@Retention(AnnotationRetention.RUNTIME)
+public annotation class SynthesizableFilter(
+
+	@get:AliasFor("name")
+	val value: String = "",
+
+	@get:AliasFor("value")
+	val name: String = "",
+
+	val and: SynthesizableFilters = SynthesizableFilters()
+
+)

spring-core/src/test/kotlin/org/springframework/core/annotation/SynthesizableFilters.kt

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2002-2022 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
+ *
+ *      https://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.core.annotation
+
+/**
+ * @author Sam Brannen
+ * @since 5.3.16
+ */
+@Target(AnnotationTarget.FUNCTION)
+@Retention(AnnotationRetention.RUNTIME)
+public annotation class SynthesizableFilters(
+
+	vararg val value: SynthesizableFilter
+
+)

spring-core/src/test/kotlin/org/springframework/core/annotation/SynthesizablePerson.kt

@@ -0,0 +1,35 @@
+/*
+ * Copyright 2002-2022 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
+ *
+ *      https://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.core.annotation
+
+/**
+ * @author Sam Brannen
+ * @since 5.3.16
+ */
+@Target(AnnotationTarget.FUNCTION)
+@Retention(AnnotationRetention.RUNTIME)
+public annotation class SynthesizablePerson(
+
+	@get:AliasFor("name")
+	val value: String = "",
+
+	@get:AliasFor("value")
+	val name: String = "",
+
+	vararg val friends: SynthesizablePerson = []
+
+)