Examples of com.google.inject.Module

com.google.inject.Module
A module contributes configuration information, typically interface bindings, which will be used to create an {@link Injector}. A guice-based application is ultimately composed of little more than a set of {@code Module}s and some bootstrapping code.
Your Module classes can use a more streamlined syntax by extending {@link AbstractModule} rather than implementing this interface directly.

    }
  }
  
  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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  /**
   * Doubly-installed modules should not conflict, even when one is overridden.
   */
  public void testModuleOverrideRepeatedInstalls_toInstance() {
    Module m = new AbstractModule() {
      @Override protected void configure() {
        OptionalBinder<String> b = OptionalBinder.newOptionalBinder(binder(), String.class);
        b.setDefault().toInstance("A");
        b.setBinding().toInstance("B");
      }

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  }


  public void testModuleOverrideRepeatedInstalls_toKey() {
    final Key<String> aKey = Key.get(String.class, Names.named("A_string"));
    final Key<String> bKey = Key.get(String.class, Names.named("B_string"));
    Module m = new AbstractModule() {
      @Override protected void configure() {
        bind(aKey).toInstance("A");
        bind(bKey).toInstance("B");


        OptionalBinder<String> b = OptionalBinder.newOptionalBinder(binder(), String.class);

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  public void testModuleOverrideRepeatedInstalls_toProviderInstance() {
    // Providers#of() does not redefine equals/hashCode, so use the same one both times.
    final Provider<String> aProvider = Providers.of("A");
    final Provider<String> bProvider = Providers.of("B");
    Module m = new AbstractModule() {
      @Override protected void configure() {
        OptionalBinder<String> b = OptionalBinder.newOptionalBinder(binder(), String.class);
        b.setDefault().toProvider(aProvider);
        b.setBinding().toProvider(bProvider);
      }

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      return "B";
    }
  }


  public void testModuleOverrideRepeatedInstalls_toProviderKey() {
    Module m = new AbstractModule() {
      @Override protected void configure() {
        OptionalBinder<String> b = OptionalBinder.newOptionalBinder(binder(), String.class);
        b.setDefault().toProvider(Key.get(AStringProvider.class));
        b.setBinding().toProvider(Key.get(BStringProvider.class));
      }

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      return "StringGrabber(" + string + ")";
    }
  }


  public void testModuleOverrideRepeatedInstalls_toConstructor() {
    Module m = new AbstractModule() {
      @Override protected void configure() {
        Key<String> aKey = Key.get(String.class, Names.named("A_string"));
        Key<String> bKey = Key.get(String.class, Names.named("B_string"));
        bind(aKey).toInstance("A");
        bind(bKey).toInstance("B");

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  /**
   * Unscoped bindings should not conflict, whether they were bound with no explicit scope, or
   * explicitly bound in {@link Scopes#NO_SCOPE}.
   */
  public void testDuplicateUnscopedBindings() {
    Module m = new AbstractModule() {
      @Override protected void configure() {
        OptionalBinder<Integer> b = OptionalBinder.newOptionalBinder(binder(), Integer.class);
        b.setDefault().to(Key.get(Integer.class, named("foo")));
        b.setDefault().to(Key.get(Integer.class, named("foo"))).in(Scopes.NO_SCOPE);
        b.setBinding().to(Key.get(Integer.class, named("foo")));

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  /**
   * Ensure key hash codes are fixed at injection time, not binding time.
   */
  public void testKeyHashCodesFixedAtInjectionTime() {
    Module m = new AbstractModule() {
      @Override protected void configure() {
        OptionalBinder<List<String>> b = OptionalBinder.newOptionalBinder(binder(), listOfStrings);
        List<String> list = Lists.newArrayList();
        b.setDefault().toInstance(list);
        b.setBinding().toInstance(list);

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