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day17.ts
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/*Solution*/
type RockPaperScissors = "👊🏻" | "🖐🏾" | "✌🏽";
type R = "👊🏻🖐🏾✌🏽👊🏻";
type WhoWins<T extends RockPaperScissors, U extends RockPaperScissors> = T extends U ? "draw" : R extends `${infer _}${T}${U}${infer _}` ? "win" : "lose";
/*Tests*/
import { Expect, Equal } from "type-testing";
type test_0_actual = WhoWins<"👊🏻", "🖐🏾">;
type test_0_expected = "win";
type test_0 = Expect<Equal<test_0_expected, test_0_actual>>;
type test_1_actual = WhoWins<"👊🏻", "✌🏽">;
type test_1_expected = "lose";
type test_1 = Expect<Equal<test_1_expected, test_1_actual>>;
type test_2_actual = WhoWins<"👊🏻", "👊🏻">;
type test_2_expected = "draw";
type test_2 = Expect<Equal<test_2_expected, test_2_actual>>;
type test_3_actual = WhoWins<"🖐🏾", "👊🏻">;
type test_3_expected = "lose";
type test_3 = Expect<Equal<test_3_expected, test_3_actual>>;
type test_4_actual = WhoWins<"🖐🏾", "✌🏽">;
type test_4_expected = "win";
type test_4 = Expect<Equal<test_4_expected, test_4_actual>>;
type test_5_actual = WhoWins<"🖐🏾", "🖐🏾">;
type test_5_expected = "draw";
type test_5 = Expect<Equal<test_5_expected, test_5_actual>>;
type test_6_actual = WhoWins<"✌🏽", "👊🏻">;
type test_6_expected = "win";
type test_6 = Expect<Equal<test_6_expected, test_6_actual>>;
type test_7_actual = WhoWins<"✌🏽", "✌🏽">;
type test_7_expected = "draw";
type test_7 = Expect<Equal<test_7_expected, test_7_actual>>;
type test_8_actual = WhoWins<"✌🏽", "🖐🏾">;
type test_8_expected = "lose";
type test_8 = Expect<Equal<test_8_expected, test_8_actual>>;