typed-utilities/build/__tests__/tap.test.js

Strongly typed general purpose utilities

"use strict";

var _ = require("..");

test(`tap`, () => {
  const t1 = [1, 2, 3];
  let sum = 0;
  const t2 = t1.map((0, _.tap)(value => {
    sum += value;
  }));
  expect(t2).toEqual(t1);
  expect(sum).toEqual(6);
});
test(`tapAsync`, async () => {
  const t1 = [1, 2, 3];
  let sum = 0;
  const t2 = await (0, _.mapAsyncConcurrent)(t1, (0, _.tapAsync)(async value => {
    await (0, _.sleep)(0);
    sum += value;
  }));
  expect(t2).toEqual(t1);
  expect(sum).toEqual(6);
});
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