Examples of com.google.inject.AbstractModule

com.google.inject.AbstractModule
A support class for {@link Module}s which reduces repetition and results in a more readable configuration. Simply extend this class, implement {@link #configure()}, and call the inherited methods which mirror those found in {@link Binder}. For example:
```
 public class MyModule extends AbstractModule { protected void configure() { bind(Service.class).to(ServiceImpl.class).in(Singleton.class); bind(CreditCardPaymentService.class); bind(PaymentService.class).to(CreditCardPaymentService.class); bindConstant().annotatedWith(Names.named("port")).to(8080); } } 
```
@author crazybob@google.com (Bob Lee)

          "at " + module.getClass().getName() + ".configure(");
    }
  }  
  
  public void testDifferentBindingsFail_both() {
    Module module = new AbstractModule() {
      @Override protected void configure() {
        OptionalBinder.newOptionalBinder(binder(), String.class).setDefault().toInstance("a");
        OptionalBinder.newOptionalBinder(binder(), String.class).setDefault().toInstance("b");
        OptionalBinder.newOptionalBinder(binder(), String.class).setBinding().toInstance("b");
        OptionalBinder.newOptionalBinder(binder(), String.class).setBinding().toInstance("c");
      }
    };
    try {
      Guice.createInjector(module);
      fail();
    } catch (CreationException ce) {
      assertEquals(ce.getMessage(), 2, ce.getErrorMessages().size());      
      assertContains(ce.getMessage(),
          "1) A binding to java.lang.String annotated with @"
              + Default.class.getName() + " was already configured at "
              + module.getClass().getName() + ".configure(",
          "at " + module.getClass().getName() + ".configure(",
          "2) A binding to java.lang.String annotated with @"
              + Actual.class.getName() + " was already configured at "
              + module.getClass().getName() + ".configure(",
          "at " + module.getClass().getName() + ".configure(");
    }
  }

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          "at " + module.getClass().getName() + ".configure(");
    }
  }
  
  public void testQualifiedAggregatesTogether() throws Exception {
    Module module1 = new AbstractModule() {
      @Override
      protected void configure() {
        OptionalBinder.newOptionalBinder(binder(), Key.get(String.class, Names.named("foo")));
      }
    };
    Module module2 = new AbstractModule() {
      @Override
      protected void configure() {
        OptionalBinder.newOptionalBinder(binder(), Key.get(String.class, Names.named("foo")))
            .setDefault().toInstance("a");
      }
    };
    Module module3 = new AbstractModule() {
      @Override
      protected void configure() {
        OptionalBinder.newOptionalBinder(binder(), Key.get(String.class, Names.named("foo")))
            .setBinding().toInstance("b");
      }

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  }
  
  public void testMultipleDifferentOptionals() {
    final Key<String> bKey = Key.get(String.class, named("b"));
    final Key<String> cKey = Key.get(String.class, named("c"));
    Module module = new AbstractModule() {
      @Override protected void configure() {
        OptionalBinder.newOptionalBinder(binder(), String.class).setDefault().toInstance("a");
        OptionalBinder.newOptionalBinder(binder(), Integer.class).setDefault().toInstance(1);
        
        OptionalBinder.newOptionalBinder(binder(), bKey).setDefault().toInstance("b");

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    assertOptionalVisitor(bKey, setOf(module), VisitType.BOTH, 3, instance("b"), null, null);
    assertOptionalVisitor(cKey, setOf(module), VisitType.BOTH, 3, instance("c"), null, null);
  }
  
  public void testOptionalIsAppropriatelyLazy() throws Exception {
    Module module = new AbstractModule() {
      int nextValue = 1;
      @Override protected void configure() {
        OptionalBinder.newOptionalBinder(binder(), Integer.class)
            .setDefault().to(Key.get(Integer.class, Names.named("foo")));
      }

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    }
  }
  
  public void testLinkedToNullProvidersMakeAbsentValuesAndPresentProviders_default()
      throws Exception {
    Module module = new AbstractModule() {
      @Override protected void configure() {
        OptionalBinder.newOptionalBinder(binder(), String.class)
            .setDefault().toProvider(Providers.<String>of(null));
      }
    };

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    }
  }
  
  public void testLinkedToNullProvidersMakeAbsentValuesAndPresentProviders_actual()
      throws Exception {
    Module module = new AbstractModule() {
      @Override protected void configure() {
        OptionalBinder.newOptionalBinder(binder(), String.class)
            .setBinding().toProvider(Providers.<String>of(null));
      }
    };

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    }
  }
  
  // TODO(sameb): Maybe change this?
  public void testLinkedToNullActualDoesntFallbackToDefault() throws Exception {
    Module module = new AbstractModule() {
      @Override protected void configure() {
        OptionalBinder.newOptionalBinder(binder(), String.class).setDefault().toInstance("a");
        OptionalBinder.newOptionalBinder(binder(), String.class)
            .setBinding().toProvider(Providers.<String>of(null));
      }

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    }
  }


  public void testSourceLinesInException() {
    try {
      Guice.createInjector(new AbstractModule() {
        @Override protected void configure() {
          OptionalBinder.newOptionalBinder(binder(),  Integer.class).setDefault();
        }
      });
      fail();

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          "at " + getClass().getName());
    }
  }


  public void testDependencies_both() {
    Injector injector = Guice.createInjector(new AbstractModule() {
      @Override protected void configure() {
        OptionalBinder<String> optionalbinder =
            OptionalBinder.newOptionalBinder(binder(), String.class);
        optionalbinder.setDefault().toInstance("A");
        optionalbinder.setBinding().to(Key.get(String.class, Names.named("b")));

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    elements.addAll(recurseForDependencies(injector, withDependencies));
    assertEquals(ImmutableSet.of("B"), elements);
  }


  public void testDependencies_actual() {
    Injector injector = Guice.createInjector(new AbstractModule() {
      @Override protected void configure() {
        OptionalBinder<String> optionalbinder =
            OptionalBinder.newOptionalBinder(binder(), String.class);
        optionalbinder.setBinding().to(Key.get(String.class, Names.named("b")));
        bindConstant().annotatedWith(Names.named("b")).to("B");

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