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MergedAnnotationCollectorsTests.java
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MergedAnnotationCollectorsTests.java
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/*
* 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;
import java.lang.annotation.Annotation;
import java.lang.annotation.Repeatable;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.util.Arrays;
import java.util.LinkedHashSet;
import java.util.Set;
import java.util.stream.Stream;
import org.junit.jupiter.api.Test;
import org.springframework.core.annotation.MergedAnnotation.Adapt;
import org.springframework.util.MultiValueMap;
import static org.assertj.core.api.Assertions.assertThat;
/**
* Tests for {@link MergedAnnotationCollectors}.
*
* @author Phillip Webb
*/
class MergedAnnotationCollectorsTests {
@Test
void toAnnotationSetCollectsLinkedHashSetWithSynthesizedAnnotations() {
Set<TestAnnotation> set = stream().collect(
MergedAnnotationCollectors.toAnnotationSet());
assertThat(set).isInstanceOf(LinkedHashSet.class).flatExtracting(
TestAnnotation::value).containsExactly("a", "b", "c");
assertThat(set).allMatch(AnnotationUtils::isSynthesizedAnnotation);
}
@Test
void toAnnotationArrayCollectsAnnotationArrayWithSynthesizedAnnotations() {
Annotation[] array = stream().collect(
MergedAnnotationCollectors.toAnnotationArray());
assertThat(Arrays.stream(array).map(
annotation -> ((TestAnnotation) annotation).value())).containsExactly("a",
"b", "c");
assertThat(array).allMatch(AnnotationUtils::isSynthesizedAnnotation);
}
@Test
void toSuppliedAnnotationArrayCollectsAnnotationArrayWithSynthesizedAnnotations() {
TestAnnotation[] array = stream().collect(
MergedAnnotationCollectors.toAnnotationArray(TestAnnotation[]::new));
assertThat(Arrays.stream(array).map(TestAnnotation::value)).containsExactly("a",
"b", "c");
assertThat(array).allMatch(AnnotationUtils::isSynthesizedAnnotation);
}
@Test
void toMultiValueMapCollectsMultiValueMap() {
MultiValueMap<String, Object> map = stream().map(
MergedAnnotation::filterDefaultValues).collect(
MergedAnnotationCollectors.toMultiValueMap(
Adapt.CLASS_TO_STRING));
assertThat(map.get("value")).containsExactly("a", "b", "c");
assertThat(map.get("extra")).containsExactly("java.lang.String",
"java.lang.Integer");
}
@Test
void toFinishedMultiValueMapCollectsMultiValueMap() {
MultiValueMap<String, Object> map = stream().collect(
MergedAnnotationCollectors.toMultiValueMap(result -> {
result.add("finished", true);
return result;
}));
assertThat(map.get("value")).containsExactly("a", "b", "c");
assertThat(map.get("extra")).containsExactly(void.class, String.class,
Integer.class);
assertThat(map.get("finished")).containsExactly(true);
}
private Stream<MergedAnnotation<TestAnnotation>> stream() {
return MergedAnnotations.from(WithTestAnnotations.class).stream(TestAnnotation.class);
}
@Retention(RetentionPolicy.RUNTIME)
@Repeatable(TestAnnotations.class)
@interface TestAnnotation {
@AliasFor("name")
String value() default "";
@AliasFor("value")
String name() default "";
Class<?> extra() default void.class;
}
@Retention(RetentionPolicy.RUNTIME)
@interface TestAnnotations {
TestAnnotation[] value();
}
@TestAnnotation("a")
@TestAnnotation(name = "b", extra = String.class)
@TestAnnotation(name = "c", extra = Integer.class)
static class WithTestAnnotations {
}
}