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/****************************************************************************
* Sangria *
* Copyright (C) 2014 Tavian Barnes <tavianator@tavianator.com> *
* *
* 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.tavianator.sangria.core;
import java.lang.annotation.Annotation;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import javax.inject.Qualifier;
import com.google.inject.CreationException;
import com.google.inject.Key;
import com.google.inject.name.Names;
import org.hamcrest.Matcher;
import org.hamcrest.Matchers;
import org.junit.Test;
import static org.hamcrest.Matchers.*;
import static org.junit.Assert.*;
/**
* Tests for {@link PotentialAnnotation}s.
*
* @author Tavian Barnes (tavianator@tavianator.com)
* @version 1.2
* @since 1.1
*/
public class PotentialAnnotationTest {
@Retention(RetentionPolicy.RUNTIME)
@Qualifier
private @interface Simple {
}
private final PotentialAnnotation none = PotentialAnnotation.none();
private final Annotation nameAnnotation = Names.named("name");
@Test
public void testHasAnnotation() {
assertThat(none.hasAnnotation(), is(false));
assertThat(none.annotatedWith(Simple.class).hasAnnotation(), is(true));
assertThat(none.annotatedWith(nameAnnotation).hasAnnotation(), is(true));
}
@Test(expected = CreationException.class)
public void testInvalidAnnotatedWithType() {
none.annotatedWith(Simple.class)
.annotatedWith(Simple.class);
}
@Test(expected = CreationException.class)
public void testInvalidAnnotatedWithInstance() {
none.annotatedWith(nameAnnotation)
.annotatedWith(nameAnnotation);
}
@Test
public void testGetKey() {
assertThat(none.getKey(String.class),
equalTo(new Key<String>() { }));
assertThat(none.annotatedWith(Simple.class).getKey(String.class),
equalTo(new Key<String>(Simple.class) { }));
assertThat(none.annotatedWith(nameAnnotation).getKey(String.class),
equalTo(new Key<String>(nameAnnotation) { }));
}
@Test
public void testFromKey() {
assertThat(PotentialAnnotation.from(new Key<String>() { }),
equalTo(none));
assertThat(PotentialAnnotation.from(new Key<String>(Simple.class) { }),
equalTo(none.annotatedWith(Simple.class)));
assertThat(PotentialAnnotation.from(new Key<String>(nameAnnotation) { }),
equalTo(none.annotatedWith(nameAnnotation)));
}
@Test
public void testVisitor() {
PotentialAnnotation.Visitor<String> visitor = new PotentialAnnotation.Visitor<String>() {
@Override
public String visitNoAnnotation() {
return "none";
}
@Override
public String visitAnnotationType(Class<? extends Annotation> annotationType) {
assertThat((Object)annotationType, equalTo((Object)Simple.class));
return "type";
}
@Override
public String visitAnnotationInstance(Annotation annotation) {
assertThat(annotation, equalTo(nameAnnotation));
return "instance";
}
};
assertThat(none.accept(visitor), equalTo("none"));
assertThat(none.annotatedWith(Simple.class).accept(visitor), equalTo("type"));
assertThat(none.annotatedWith(nameAnnotation).accept(visitor), equalTo("instance"));
}
@Test
public void testToString() {
assertThat(none.toString(),
equalTo("[no annotation]"));
assertThat(none.annotatedWith(Simple.class).toString(),
equalTo("@com.tavianator.sangria.core.PotentialAnnotationTest.Simple"));
assertThat(none.annotatedWith(nameAnnotation).toString(),
equalTo("@com.google.inject.name.Named(value=name)"));
}
/**
* Needed to avoid compilation error due to inferred type being anonymous class.
*/
private static <T> Matcher<Key<T>> equalTo(Key<T> key) {
return Matchers.equalTo(key);
}
private static <T> Matcher<T> equalTo(T object) {
return Matchers.equalTo(object);
}
}
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