wasmuth/test/map.js

Practical, functional utilities that fallback on native implementations as much as possible

const test = require("tape");

const {path, map} = require("../");

test("map", (t) => {
  t.deepEqual(
    map((i) => i + 1, [1, 2, 3, 4]),
    [2, 3, 4, 5]
  );
  t.deepEqual(
    map((x, idx) => idx, ["a", "b", "c", "d"]),
    [0, 1, 2, 3]
  );
  t.deepEqual(
    map((...args) => args[1], ["a", "b", "c", "d"]),
    [0, 1, 2, 3]
  );
  t.deepEqual(map(path("id"), [{id: 1}, {id: 2}, {id: 3}, {id: 4}]), [
    1,
    2,
    3,
    4,
  ]);
  t.deepEqual(
    map((k, v) => v + 1, {a: 1, b: 2, c: 3}),
    {a: 2, b: 3, c: 4}
  );
  t.end();
});