more fixes

src/index.ts

@@ -1,4 +1,4 @@
 export { getDifference, getIntersection, getSymmetricDifference, getUnion } from './operations';
-export { areSetsDisjoint, areSetsEqual, areSetsEquivalent, isProperSubsetOf, isProperSupersetOf, isSubsetOf, isSupersetOf } from './predicates';
+export { areSetsDisjoint, areSetsEqual, areSetsEquivalent, containsAllElements, isProperSubsetOf, isProperSupersetOf, isSubsetOf, isSupersetOf } from './predicates';
 export { getJaccardSimilarityCoefficient, getLogDice, getOverlapCoefficient, getSorensenDiceCoefficient } from './similarity';
 export type { SetFunction, SetOperation, SetPredicate, SetSimilarity } from './types';

src/predicates.ts

@@ -170,7 +170,7 @@ export function isSupersetOf<TElement>(a: Set<TElement>, b: Set<TElement>): bool
  * @param b - Set B of type `<TElement>` elements
  * @returns Whether A contains all elements of B
  */
-function containsAllElements<TElement>(a: Set<TElement>, b: Set<TElement>): boolean {
+export function containsAllElements<TElement>(a: Set<TElement>, b: Set<TElement>): boolean {
 	for (const element of b) {
 		if (!a.has(element)) {
 			return false;

tests/predicates.spec.ts

@@ -4,12 +4,26 @@ import {
 	areSetsDisjoint,
 	areSetsEqual,
 	areSetsEquivalent,
+	containsAllElements,
 	isProperSubsetOf,
 	isProperSupersetOf,
 	isSubsetOf,
 	isSupersetOf,
 } from '../src';
 
+describe('containsAllElements', () => {
+	test.each([
+		[[1, 2, 3], [1, 2], true],
+		[[1, 2, 3], [], true],
+		[[1, 2, 3], [4], false],
+	])('%O contains %O is %O', (a, b, expected) => {
+		expect(containsAllElements(
+			new Set(a),
+			new Set(b),
+		)).toBe(expected);
+	});
+});
+
 describe('areSetsDisjoint', () => {
 	test.each([
 		[true, [], []],

tests/similarity.spec.ts

@@ -8,22 +8,21 @@ import {
 } from '../src';
 
 describe('Jaccard\'s Similarity Coefficient', () => {
-
 	test.each([
-		['hello world', 'world hello', 1.0],
-		['', '', 1.0],
+		[[], [], 1],
+		[['hello', 'world'], ['world', 'hello'], 1],
 	])('comparing "%s" and "%s" will give a score of %f', (a, b, expected) => {
 		expect(getJaccardSimilarityCoefficient(
-			new Set(a.split(' ')),
-			new Set(b.split(' ')),
+			new Set(a),
+			new Set(b),
 		)).toBeCloseTo(expected);
 	});
 });
 
 describe('Pavel Rychlý\'s LogDice', () => {
 	test.each([
-		['hello world', 'world hello'],
 		['', ''],
+		['hello world', 'world hello'],
 	])('comparing "%s" and "%s" will give 14 for full similarity', (a, b) => {
 		expect(getLogDice(
 			new Set(a.split(' ')),