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      1 /**
      2  * Copyright (C) 2015 Google Inc.
      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  * http://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 package com.google.inject.daggeradapter;
     17 
     18 import static dagger.Provides.Type.SET;
     19 
     20 import com.google.common.collect.ImmutableSet;
     21 import com.google.inject.AbstractModule;
     22 import com.google.inject.Binder;
     23 import com.google.inject.Guice;
     24 import com.google.inject.Injector;
     25 import com.google.inject.Key;
     26 import com.google.inject.Module;
     27 import com.google.inject.Provides;
     28 import com.google.inject.multibindings.Multibinder;
     29 import com.google.inject.util.Providers;
     30 
     31 import junit.framework.TestCase;
     32 
     33 import java.util.Set;
     34 
     35 /**
     36  * Tests for {@link DaggerAdapter}.
     37  *
     38  * @author cgruber (at) google.com (Christian Gruber)
     39  */
     40 
     41 public class DaggerAdapterTest extends TestCase {
     42   @dagger.Module static class SimpleDaggerModule {
     43     @dagger.Provides Integer anInteger() {
     44       return 1;
     45     }
     46   }
     47 
     48   public void testSimpleModule() {
     49     Injector i = Guice.createInjector(DaggerAdapter.from(new SimpleDaggerModule()));
     50     assertEquals((Integer) 1, i.getInstance(Integer.class));
     51   }
     52 
     53   static class SimpleGuiceModule extends AbstractModule {
     54     @Provides String aString(Integer i) {
     55       return i.toString();
     56     }
     57     @Override protected void configure() {}
     58   }
     59 
     60   public void testInteractionWithGuiceModules() {
     61      Injector i = Guice.createInjector(
     62          new SimpleGuiceModule(),
     63          DaggerAdapter.from(new SimpleDaggerModule()));
     64      assertEquals("1", i.getInstance(String.class));
     65   }
     66 
     67   @dagger.Module static class SetBindingDaggerModule1 {
     68     @dagger.Provides(type=SET) Integer anInteger() {
     69       return 5;
     70     }
     71   }
     72 
     73   @dagger.Module static class SetBindingDaggerModule2 {
     74     @dagger.Provides(type=SET) Integer anInteger() {
     75       return 3;
     76     }
     77   }
     78 
     79   public void testSetBindings() {
     80     Injector i = Guice.createInjector(
     81         DaggerAdapter.from(new SetBindingDaggerModule1(), new SetBindingDaggerModule2()));
     82     assertEquals(ImmutableSet.of(3, 5), i.getInstance(new Key<Set<Integer>>() {}));
     83   }
     84 
     85   static class MultibindingGuiceModule implements Module {
     86     @Override public void configure(Binder binder) {
     87       Multibinder<Integer> mb = Multibinder.newSetBinder(binder, Integer.class);
     88       mb.addBinding().toInstance(13);
     89       mb.addBinding().toProvider(Providers.of(8)); // mix'n'match.
     90     }
     91   }
     92 
     93   public void testSetBindingsWithGuiceModule() {
     94     Injector i = Guice.createInjector(
     95         new MultibindingGuiceModule(),
     96         DaggerAdapter.from(new SetBindingDaggerModule1(), new SetBindingDaggerModule2()));
     97     assertEquals(ImmutableSet.of(13, 3, 5, 8), i.getInstance(new Key<Set<Integer>>() {}));
     98   }
     99 }
    100