| /* |
| * Copyright 2017 Google LLC |
| * |
| * 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 |
| * |
| * http://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 com.google.auto.common; |
| |
| import static com.google.common.collect.Iterables.getOnlyElement; |
| import static com.google.common.truth.Truth.assertThat; |
| import static org.junit.Assert.fail; |
| |
| import com.google.common.collect.ImmutableMap; |
| import com.google.testing.compile.CompilationRule; |
| import java.util.HashMap; |
| import java.util.Map; |
| import javax.lang.model.element.AnnotationMirror; |
| import javax.lang.model.element.AnnotationValue; |
| import javax.lang.model.element.AnnotationValueVisitor; |
| import javax.lang.model.element.TypeElement; |
| import org.junit.Rule; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.JUnit4; |
| |
| /** Tests for {@link SimpleAnnotationMirror}. */ |
| @RunWith(JUnit4.class) |
| public class SimpleAnnotationMirrorTest { |
| @Rule public final CompilationRule compilation = new CompilationRule(); |
| |
| @interface EmptyAnnotation {} |
| |
| @interface AnnotationWithDefault { |
| int value() default 3; |
| } |
| |
| @interface MultipleValues { |
| int value1(); |
| |
| int value2(); |
| } |
| |
| @Test |
| public void emptyAnnotation() { |
| TypeElement emptyAnnotation = getTypeElement(EmptyAnnotation.class); |
| AnnotationMirror simpleAnnotation = SimpleAnnotationMirror.of(emptyAnnotation); |
| assertThat(simpleAnnotation.getAnnotationType()).isEqualTo(emptyAnnotation.asType()); |
| assertThat(simpleAnnotation.getElementValues()).isEmpty(); |
| } |
| |
| @Test |
| public void multipleValues() { |
| TypeElement multipleValues = getTypeElement(MultipleValues.class); |
| Map<String, AnnotationValue> values = new HashMap<>(); |
| values.put("value1", intValue(1)); |
| values.put("value2", intValue(2)); |
| assertThat(SimpleAnnotationMirror.of(multipleValues, values).getElementValues()).hasSize(2); |
| } |
| |
| @Test |
| public void extraValues() { |
| TypeElement multipleValues = getTypeElement(MultipleValues.class); |
| Map<String, AnnotationValue> values = new HashMap<>(); |
| values.put("value1", intValue(1)); |
| values.put("value2", intValue(2)); |
| values.put("value3", intValue(3)); |
| expectThrows(() -> SimpleAnnotationMirror.of(multipleValues, values)); |
| } |
| |
| @Test |
| public void defaultValue() { |
| TypeElement withDefaults = getTypeElement(AnnotationWithDefault.class); |
| AnnotationMirror annotation = SimpleAnnotationMirror.of(withDefaults); |
| assertThat(annotation.getElementValues()).hasSize(1); |
| assertThat(getOnlyElement(annotation.getElementValues().values()).getValue()).isEqualTo(3); |
| } |
| |
| @Test |
| public void overriddenDefaultValue() { |
| TypeElement withDefaults = getTypeElement(AnnotationWithDefault.class); |
| AnnotationMirror annotation = |
| SimpleAnnotationMirror.of(withDefaults, ImmutableMap.of("value", intValue(4))); |
| assertThat(annotation.getElementValues()).hasSize(1); |
| assertThat(getOnlyElement(annotation.getElementValues().values()).getValue()).isEqualTo(4); |
| } |
| |
| @Test |
| public void missingValues() { |
| TypeElement multipleValues = getTypeElement(MultipleValues.class); |
| expectThrows(() -> SimpleAnnotationMirror.of(multipleValues)); |
| } |
| |
| @Test |
| public void notAnAnnotation() { |
| TypeElement stringElement = getTypeElement(String.class); |
| expectThrows(() -> SimpleAnnotationMirror.of(stringElement)); |
| } |
| |
| private TypeElement getTypeElement(Class<?> clazz) { |
| return compilation.getElements().getTypeElement(clazz.getCanonicalName()); |
| } |
| |
| private static void expectThrows(Runnable throwingRunnable) { |
| try { |
| throwingRunnable.run(); |
| fail("Expected an IllegalArgumentException"); |
| } catch (IllegalArgumentException expected) { |
| } |
| } |
| |
| private static AnnotationValue intValue(int value) { |
| return new AnnotationValue() { |
| @Override |
| public Object getValue() { |
| return value; |
| } |
| |
| @Override |
| public <R, P> R accept(AnnotationValueVisitor<R, P> annotationValueVisitor, P p) { |
| return annotationValueVisitor.visitInt(value, p); |
| } |
| }; |
| } |
| } |