adding allOf validation and test cases (#438)

Author: ShivKJ

src/main/java/am/ik/yavi/constraint/CollectionConstraint.java

@@ -29,6 +29,7 @@
 import static am.ik.yavi.core.NullAs.VALID;
 import static am.ik.yavi.core.ViolationMessage.Default.COLLECTION_CONTAINS;
 import static am.ik.yavi.core.ViolationMessage.Default.COLLECTION_UNIQUE;
+import static am.ik.yavi.core.ViolationMessage.Default.COLLECTION_CONTAINS_ALL;
 
 public class CollectionConstraint<T, L extends Collection<E>, E>
 		extends ContainerConstraintBase<T, L, CollectionConstraint<T, L, E>> {
@@ -69,6 +70,23 @@ public CollectionConstraint<T, L, E> unique() {
 		return this;
 	}
 
+	public CollectionConstraint<T, L, E> containsAll(Collection<? extends E> values) {
+		this.predicates().add(ConstraintPredicate.withViolatedValue(collection -> {
+			final Set<E> missingValues = new HashSet<>(values);
+
+			if (collection instanceof Set) {
+				missingValues.removeAll(collection);
+			}
+			else {
+				missingValues.removeAll(new HashSet<>(collection));
+			}
+
+			return missingValues.isEmpty() ? Optional.empty() : Optional.of(new ViolatedValue(missingValues));
+		}, COLLECTION_CONTAINS_ALL, () -> new Object[] { values.toString() }, VALID));
+
+		return this;
+	}
+
 	@Override
 	protected ToIntFunction<L> size() {
 		return Collection::size;

src/main/java/am/ik/yavi/core/ViolationMessage.java

@@ -94,6 +94,8 @@ enum Default implements ViolationMessage {
 		BYTE_SIZE_FIXED_SIZE("byteSize.fixedSize", "The byte size of \"{0}\" must be {1}. The given size is {2}"), //
 		COLLECTION_CONTAINS("collection.contains", "\"{0}\" must contain {1}"), //
 		COLLECTION_UNIQUE("collection.unique", "\"{0}\" must be unique. {1} is/are duplicated."), //
+		COLLECTION_CONTAINS_ALL("collection.containsAll",
+				"\"{0}\" must be have of all of the following values: {1}, missing values: {2}"), //
 		MAP_CONTAINS_VALUE("map.containsValue", "\"{0}\" must contain value {1}"), //
 		MAP_CONTAINS_KEY("map.containsKey", "\"{0}\" must contain key {1}"), //
 		ARRAY_CONTAINS("array.contains", "\"{0}\" must contain {1}"), //

src/test/java/am/ik/yavi/constraint/CollectionConstraintTest.java

@@ -86,6 +86,33 @@ void unique() {
 		assertThat(predicate.test(Arrays.asList("a", "b", "c", "b"))).isFalse();
 	}
 
+	@Test
+	void containsAll() {
+		List<String> mustVisitCities = Arrays.asList("a", "b", "c");
+		Predicate<List<String>> predicate = retrievePredicate(c -> c.containsAll(mustVisitCities));
+
+		List<String> visitingCities = Arrays.asList("a", "b", "c", "d");
+		assertThat(predicate.test(visitingCities)).isTrue();
+
+		visitingCities = Arrays.asList("a", "b", "c");
+		assertThat(predicate.test(visitingCities)).isTrue();
+
+		visitingCities = Arrays.asList("a", "b");
+		assertThat(predicate.test(visitingCities)).isFalse();
+
+		visitingCities = Arrays.asList("a");
+		assertThat(predicate.test(visitingCities)).isFalse();
+
+		visitingCities = Arrays.asList();
+		assertThat(predicate.test(visitingCities)).isFalse();
+
+		visitingCities = Arrays.asList("a", "b", "d");
+		assertThat(predicate.test(visitingCities)).isFalse();
+
+		visitingCities = Arrays.asList("x", "y");
+		assertThat(predicate.test(visitingCities)).isFalse();
+	}
+
 	private static Predicate<List<String>> retrievePredicate(
 			Function<CollectionConstraint<List<String>, List<String>, String>, CollectionConstraint<List<String>, List<String>, String>> constraint) {
 		return constraint.apply(new CollectionConstraint<>()).predicates().peekFirst().predicate();