### Question:
MagnetInstanceManager implements InstanceManager { @Override public <T> @NotNull List<InstanceFactory<T>> getManyInstanceFactories( Class<T> type, String classifier, FactoryFilter factoryFilter ) { Object indexed = index.get(type); if (indexed instanceof Range) { Range range = (Range) indexed; if (range.getClassifier().equals(classifier)) { return factoriesFromRange(range, factoryFilter); } return Collections.emptyList(); } if (indexed instanceof Map) { Map<String, Range> ranges = (Map<String, Range>) indexed; Range range = ranges.get(classifier); if (range != null) { return factoriesFromRange(range, factoryFilter); } return Collections.emptyList(); } return Collections.emptyList(); } MagnetInstanceManager(); @Override InstanceFactory<T> getInstanceFactory(
        Class<T> instanceType, String classifier, Class<InstanceFactory<T>> factoryType
    ); @Override InstanceFactory<T> getFilteredInstanceFactory(
        Class<T> type, String classifier, FactoryFilter factoryFilter
    ); @Override List<InstanceFactory<T>> getManyInstanceFactories(
        Class<T> type, String classifier, FactoryFilter factoryFilter
    );  }### Answer:
@Test public void getManyFactories_NotClassified_ManyTypeInstances() { List<InstanceFactory<Type1>> factories = instManager.getManyInstanceFactories( Type1.class, Classifier.NONE, factoryFilter); assertThat(factories).hasSize(1); assertThat(factories.get(0)).isEqualTo(instanceFactoryType1Impl1); }
@Test public void getManyFactories_Classified_ManyTypeInstances() { List<InstanceFactory<Type1>> factories = instManager.getManyInstanceFactories( Type1.class, CLASSIFIER_LOCAL, factoryFilter); assertThat(factories).hasSize(1); assertThat(factories.get(0)).isEqualTo(instanceFactoryType1Impl2); }
@Test public void getManyFactories_NotClassified_SingleTypeInstances() { List<InstanceFactory<Type2>> factories = instManager.getManyInstanceFactories( Type2.class, Classifier.NONE, factoryFilter); assertThat(factories).hasSize(2); assertThat(factories).containsAllOf(instanceFactoryType2Impl1, instanceFactoryType2Impl2); }
@Test public void getManyFactories_Classified_SingleTypeInstances() { List<InstanceFactory<Type3>> factories = instManager.getManyInstanceFactories( Type3.class, CLASSIFIER_LOCAL, factoryFilter); assertThat(factories).hasSize(1); assertThat(factories.get(0)).isEqualTo(instanceFactoryType3Impl1); }