com.google.common.collect.testing.features.CollectionSize#com.google.common.collect.testing.TestStringMapGenerator源码实例Demo

public Test testsForPatriciaTrie() {
  return MapTestSuiteBuilder
      .using(new TestStringMapGenerator() {
        @Override
        protected Map<String, String> create(
            final Entry<String, String>[] entries) {
          return populate(new PatriciaTrie<String>(), entries);
        }
      })
      .named("PatriciaTrie")
      .withFeatures(
          MapFeature.GENERAL_PURPOSE,
          MapFeature.ALLOWS_NULL_ENTRY_QUERIES,
          MapFeature.FAILS_FAST_ON_CONCURRENT_MODIFICATION,
          CollectionFeature.SUPPORTS_ITERATOR_REMOVE,
          // Assumes Insertion Order if you don't implement SortedMap
          // CollectionFeature.KNOWN_ORDER,
          CollectionFeature.SERIALIZABLE,
          CollectionSize.ANY)
      .suppressing(suppressForPatriciaTrie())
      .createTestSuite();
}
 

public Test testsForPauselessHashMap() {
    return MapTestSuiteBuilder
            .using(new TestStringMapGenerator() {
                @Override
                protected Map<String, String> create(
                        Map.Entry<String, String>[] entries) {
                    return toHashMap(entries);
                }
            })
            .named("HashMap")
            .withFeatures(
                    MapFeature.GENERAL_PURPOSE,
                    MapFeature.ALLOWS_NULL_KEYS,
                    MapFeature.ALLOWS_NULL_VALUES,
                    MapFeature.ALLOWS_ANY_NULL_QUERIES,
                    MapFeature.FAILS_FAST_ON_CONCURRENT_MODIFICATION,
                    CollectionFeature.SUPPORTS_ITERATOR_REMOVE,
                    CollectionFeature.SERIALIZABLE,
                    CollectionSize.ANY)
            .suppressing(suppressForHashMap())
            .createTestSuite();
}
 

public static TestSuite suite() {
	return MapTestSuiteBuilder
			// The create method is called with an array of elements
			// that should populate the collection.
			.using(new TestStringMapGenerator() {
				@Override
				protected Map<String, String> create(Entry<String, String>[] source) {
					Map<String, String> left = Maps.newHashMap();
					Map<String, String> right = Maps.newHashMap();
					for(int i = 0; i < source.length; i++) {
						Entry<String, String> entry = source[i];
						if (right.containsKey(entry.getKey())) {
							left.put(entry.getKey(), right.get(entry.getKey()));
							right.put(entry.getKey(), entry.getValue());
						} else if (i % 2 != 0) {
							left.put(entry.getKey(), entry.getValue());	
						} else {
							right.put(entry.getKey(), entry.getValue());
							if (i % 4 != 0) {
								left.put(entry.getKey(), "will be ignored");
							}
						}
					}
					return new UnmodifiableMergingMapView(left, right);
				}
			}).named("Guava-based UnmodifiableMergingMapView tests")
			.withFeatures(
					MapFeature.ALLOWS_NULL_KEYS,
					MapFeature.ALLOWS_NULL_VALUES,
					MapFeature.ALLOWS_ANY_NULL_QUERIES,
					MapFeature.FAILS_FAST_ON_CONCURRENT_MODIFICATION,
					CollectionFeature.ALLOWS_NULL_QUERIES,
					CollectionFeature.FAILS_FAST_ON_CONCURRENT_MODIFICATION,
					CollectionSize.ANY)
			.createTestSuite();
}
 

/** Returns a map generator for synchronous values. */
public static TestStringMapGenerator synchronousGenerator(
    Supplier<Map<String, String>> supplier) {
  return new TestStringMapGenerator() {
    @Override protected Map<String, String> create(Map.Entry<String, String>[] entries) {
      Map<String, String> map = supplier.get();
      for (Map.Entry<String, String> entry : entries) {
        map.put(entry.getKey(), entry.getValue());
      }
      return map;
    }
  };
}