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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 test.subcomponent;
     17 
     18 import java.util.Arrays;
     19 import java.util.Collection;
     20 import java.util.Set;
     21 import org.junit.Test;
     22 import org.junit.runner.RunWith;
     23 import org.junit.runners.Parameterized;
     24 import org.junit.runners.Parameterized.Parameters;
     25 
     26 import static com.google.common.collect.Sets.intersection;
     27 import static com.google.common.truth.Truth.assertThat;
     28 
     29 @RunWith(Parameterized.class)
     30 public class SubcomponentTest {
     31   private static final ParentComponent parentComponent = DaggerParentComponent.create();
     32   private static final ParentOfGenericComponent parentOfGenericComponent =
     33       DaggerParentOfGenericComponent.create();
     34 
     35   @Parameters
     36   public static Collection<Object[]> parameters() {
     37     return Arrays.asList(new Object[][] {
     38         { parentComponent, parentComponent.newChildComponent() },
     39         { parentComponent, parentComponent.newChildAbstractClassComponent() },
     40         { parentOfGenericComponent, parentOfGenericComponent.subcomponent() }});
     41   }
     42 
     43   private final ParentGetters parentGetters;
     44   private final ChildComponent childComponent;
     45 
     46   public SubcomponentTest(ParentGetters parentGetters, ChildComponent childComponent) {
     47     this.parentGetters = parentGetters;
     48     this.childComponent = childComponent;
     49   }
     50 
     51 
     52   @Test
     53   public void scopePropagatesUpward_class() {
     54     assertThat(childComponent.requiresSingleton().singletonType())
     55         .isSameAs(childComponent.requiresSingleton().singletonType());
     56     assertThat(childComponent.requiresSingleton().singletonType())
     57         .isSameAs(childComponent.newGrandchildComponent().requiresSingleton().singletonType());
     58   }
     59 
     60   @Test
     61   public void scopePropagatesUpward_provides() {
     62     assertThat(childComponent
     63         .requiresSingleton().unscopedTypeBoundAsSingleton())
     64             .isSameAs(childComponent
     65                 .requiresSingleton().unscopedTypeBoundAsSingleton());
     66     assertThat(childComponent
     67         .requiresSingleton().unscopedTypeBoundAsSingleton())
     68             .isSameAs(childComponent.newGrandchildComponent()
     69                 .requiresSingleton().unscopedTypeBoundAsSingleton());
     70   }
     71 
     72   @Test
     73   public void multibindingContributions() {
     74     Set<Object> parentObjectSet = parentGetters.objectSet();
     75     assertThat(parentObjectSet).hasSize(2);
     76     Set<Object> childObjectSet = childComponent.objectSet();
     77     assertThat(childObjectSet).hasSize(3);
     78     Set<Object> grandchildObjectSet =
     79         childComponent.newGrandchildComponent().objectSet();
     80     assertThat(grandchildObjectSet).hasSize(4);
     81     assertThat(intersection(parentObjectSet, childObjectSet)).hasSize(1);
     82     assertThat(intersection(parentObjectSet, grandchildObjectSet)).hasSize(1);
     83     assertThat(intersection(childObjectSet, grandchildObjectSet)).hasSize(1);
     84   }
     85 
     86   @Test
     87   public void unscopedProviders() {
     88     assertThat(parentGetters.getUnscopedTypeProvider())
     89         .isSameAs(childComponent.getUnscopedTypeProvider());
     90     assertThat(parentGetters.getUnscopedTypeProvider())
     91         .isSameAs(childComponent
     92             .newGrandchildComponent()
     93             .getUnscopedTypeProvider());
     94   }
     95 
     96   @Test
     97   public void passedModules() {
     98     ChildModuleWithState childModuleWithState = new ChildModuleWithState();
     99     ChildComponentRequiringModules childComponent1 =
    100         parentComponent.newChildComponentRequiringModules(
    101             new ChildModuleWithParameters(new Object()),
    102             childModuleWithState);
    103     ChildComponentRequiringModules childComponent2 =
    104         parentComponent.newChildComponentRequiringModules(
    105             new ChildModuleWithParameters(new Object()),
    106             childModuleWithState);
    107     assertThat(childComponent1.getInt()).isEqualTo(0);
    108     assertThat(childComponent2.getInt()).isEqualTo(1);
    109   }
    110 
    111   @Test
    112   public void dependenceisInASubcomponent() {
    113     assertThat(childComponent.newGrandchildComponent().needsAnInterface()).isNotNull();
    114   }
    115 }
    116