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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.lazy;
import javax.inject.Inject;
import javax.inject.Provider;
import com.google.inject.Guice;
import com.google.inject.Injector;
import com.google.inject.Module;
import com.google.inject.Stage;
import org.junit.Test;
import static org.hamcrest.Matchers.*;
import static org.junit.Assert.*;
/**
* Tests for the {@link LazySingleton} scope.
*
* @author Tavian Barnes (tavianator@tavianator.com)
* @version 1.2
* @since 1.2
*/
public class LazySingletonTest {
@LazySingleton
private static class Scoped {
static final ThreadLocal<Integer> INSTANCES = new ThreadLocal<Integer>() {
@Override
protected Integer initialValue() {
return 0;
}
};
@Inject
Scoped() {
INSTANCES.set(INSTANCES.get() + 1);
}
}
@Test
public void testDevelopment() {
test(Stage.DEVELOPMENT, new SangriaLazyModule());
}
@Test
public void testProduction() {
test(Stage.PRODUCTION, new SangriaLazyModule());
}
@Test
public void testDuplicateModule() {
test(Stage.PRODUCTION, new SangriaLazyModule(), new SangriaLazyModule());
}
private void test(Stage stage, Module... modules) {
int before = Scoped.INSTANCES.get();
Injector injector = Guice.createInjector(stage, modules);
Provider<Scoped> provider = injector.getProvider(Scoped.class);
assertThat(Scoped.INSTANCES.get(), equalTo(before));
Scoped instance = provider.get();
assertThat(Scoped.INSTANCES.get(), equalTo(before + 1));
assertThat(provider.get(), sameInstance(instance));
assertThat(Scoped.INSTANCES.get(), equalTo(before + 1));
}
}
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