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| 1 | +/* |
| 2 | + * Copyright 2002-2024 the original author or authors. |
| 3 | + * |
| 4 | + * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | + * you may not use this file except in compliance with the License. |
| 6 | + * You may obtain a copy of the License at |
| 7 | + * |
| 8 | + * https://www.apache.org/licenses/LICENSE-2.0 |
| 9 | + * |
| 10 | + * Unless required by applicable law or agreed to in writing, software |
| 11 | + * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | + * See the License for the specific language governing permissions and |
| 14 | + * limitations under the License. |
| 15 | + */ |
| 16 | + |
| 17 | +package org.springframework.expression.spel.ast; |
| 18 | + |
| 19 | +import java.util.List; |
| 20 | + |
| 21 | +import org.junit.jupiter.api.Test; |
| 22 | + |
| 23 | +import org.springframework.expression.TargetedAccessor; |
| 24 | +import org.springframework.lang.Nullable; |
| 25 | + |
| 26 | +import static org.assertj.core.api.Assertions.assertThat; |
| 27 | + |
| 28 | +/** |
| 29 | + * Tests for {@link AccessorUtils}. |
| 30 | + * |
| 31 | + * @author Sam Brannen |
| 32 | + * @since 6.1.15 |
| 33 | + */ |
| 34 | +class AccessorUtilsTests { |
| 35 | + |
| 36 | + private final TargetedAccessor animal1Accessor = createAccessor("Animal1", Animal.class); |
| 37 | + |
| 38 | + private final TargetedAccessor animal2Accessor = createAccessor("Animal2", Animal.class); |
| 39 | + |
| 40 | + private final TargetedAccessor cat1Accessor = createAccessor("Cat1", Cat.class); |
| 41 | + |
| 42 | + private final TargetedAccessor cat2Accessor = createAccessor("Cat2", Cat.class); |
| 43 | + |
| 44 | + private final TargetedAccessor generic1Accessor = createAccessor("Generic1", null); |
| 45 | + |
| 46 | + private final TargetedAccessor generic2Accessor = createAccessor("Generic2", null); |
| 47 | + |
| 48 | + private final List<TargetedAccessor> accessors = List.of( |
| 49 | + generic1Accessor, |
| 50 | + cat1Accessor, |
| 51 | + animal1Accessor, |
| 52 | + animal2Accessor, |
| 53 | + cat2Accessor, |
| 54 | + generic2Accessor |
| 55 | + ); |
| 56 | + |
| 57 | + |
| 58 | + @Test |
| 59 | + void emptyAccessorsList() { |
| 60 | + List<TargetedAccessor> accessorsToTry = AccessorUtils.getAccessorsToTry(new Cat(), List.of()); |
| 61 | + assertThat(accessorsToTry).isEmpty(); |
| 62 | + } |
| 63 | + |
| 64 | + @Test |
| 65 | + void noMatch() { |
| 66 | + List<TargetedAccessor> accessorsToTry = AccessorUtils.getAccessorsToTry(new Dog(), List.of(cat1Accessor)); |
| 67 | + assertThat(accessorsToTry).isEmpty(); |
| 68 | + } |
| 69 | + |
| 70 | + @Test |
| 71 | + void singleExactTypeMatch() { |
| 72 | + List<TargetedAccessor> accessorsToTry = AccessorUtils.getAccessorsToTry(new Cat(), List.of(cat1Accessor)); |
| 73 | + assertThat(accessorsToTry).containsExactly(cat1Accessor); |
| 74 | + } |
| 75 | + |
| 76 | + @Test |
| 77 | + void exactTypeSupertypeAndGenericMatches() { |
| 78 | + List<TargetedAccessor> accessorsToTry = AccessorUtils.getAccessorsToTry(new Cat(), accessors); |
| 79 | + assertThat(accessorsToTry).containsExactly( |
| 80 | + cat1Accessor, cat2Accessor, animal1Accessor, animal2Accessor, generic1Accessor, generic2Accessor); |
| 81 | + } |
| 82 | + |
| 83 | + @Test |
| 84 | + void supertypeAndGenericMatches() { |
| 85 | + List<TargetedAccessor> accessorsToTry = AccessorUtils.getAccessorsToTry(new Dog(), accessors); |
| 86 | + assertThat(accessorsToTry).containsExactly( |
| 87 | + animal1Accessor, animal2Accessor, generic1Accessor, generic2Accessor); |
| 88 | + } |
| 89 | + |
| 90 | + @Test |
| 91 | + void genericMatches() { |
| 92 | + List<TargetedAccessor> accessorsToTry = AccessorUtils.getAccessorsToTry("not an Animal", accessors); |
| 93 | + assertThat(accessorsToTry).containsExactly(generic1Accessor, generic2Accessor); |
| 94 | + } |
| 95 | + |
| 96 | + |
| 97 | + private static TargetedAccessor createAccessor(String name, Class<?> type) { |
| 98 | + return new DemoAccessor(name, (type != null ? new Class<?>[] { type } : null)); |
| 99 | + } |
| 100 | + |
| 101 | + |
| 102 | + private record DemoAccessor(String name, Class<?>[] types) implements TargetedAccessor { |
| 103 | + |
| 104 | + @Override |
| 105 | + @Nullable |
| 106 | + public Class<?>[] getSpecificTargetClasses() { |
| 107 | + return this.types; |
| 108 | + } |
| 109 | + |
| 110 | + @Override |
| 111 | + public final String toString() { |
| 112 | + return this.name; |
| 113 | + } |
| 114 | + } |
| 115 | + |
| 116 | + sealed interface Animal permits Cat, Dog { |
| 117 | + } |
| 118 | + |
| 119 | + static final class Cat implements Animal { |
| 120 | + } |
| 121 | + |
| 122 | + static final class Dog implements Animal { |
| 123 | + } |
| 124 | + |
| 125 | +} |
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