Function containsGabAndYo

tests/sets.test.ts:6–24

(set: Set<string | number>)

describe('Set', () => {
  it('should match Set patterns', () => {
    const containsGabAndYo = (set: Set<string | number>) =>
      match<Set<string | number>, [boolean, boolean]>(set)
        .with(P.set('gab'), (x) => {
          type t = Expect<Equal<typeof x, Set<'gab'>>>;
          return [true, false];
        })
        .with(P.set('yo'), (x) => {
          type t = Expect<Equal<typeof x, Set<'yo'>>>;
          return [false, true];
        })
        .with(P.set(P.union('gab', 'yo')), (x) => {
          type t = Expect<Equal<typeof x, Set<'gab' | 'yo'>>>;
          return [true, true];
        })
        .with(P._, (x) => {
          type t = Expect<Equal<typeof x, Set<string | number>>>;
          return [false, false];
        })
        .run();

    expect(containsGabAndYo(new Set(['gab', 'yo']))).toEqual([true, true]);
    expect(containsGabAndYo(new Set(['gab']))).toEqual([true, false]);