인프런 커뮤니티 질문&답변

type Fruit =
    | {
    name: "apple";
    color: "red";
}
    | {
    name: "banana";
    color: "yellow";
}
    | {
    name: "orange";
    color: "orange";
};

type TransformedFruit = {
    [key in Fruit as `${key["name"]}:${key['color']}`]: `${key["name"]}`;
  };

type tests = [
    Expect<
        Equal<TransformedFruit, {
            "apple:red": "apple";
            "banana:yellow": "banana";
            "orange:orange": "orange";
        }>
    >,
];