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LibJS: Implement Set.prototype.difference

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Idan Horowitz 2022-12-01 22:33:26 +02:00 • committed by Linus Groh
parent 9e693304ff
commit be8329d5f6
4 changed files with 84 additions and 0 deletions
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Userland/Libraries/LibJS/Tests/builtins/Set/Set.prototype.difference.js Normal file
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test("basic functionality", () => {
expect(Set.prototype.difference).toHaveLength(1);
const set1 = new Set(["a", "b", "c"]);
const set2 = new Set(["b", "c", "d", "e"]);
const difference1to2 = set1.difference(set2);
expect(difference1to2).toHaveSize(1);
expect(difference1to2.has("a")).toBeTrue();
const difference2to1 = set2.difference(set1);
expect(difference2to1).toHaveSize(2);
["d", "e"].forEach(value => expect(difference2to1.has(value)).toBeTrue());
});