ts-prime/src/takeWhile.test.ts

A utility library for JavaScript and Typescript.

import { takeWhile } from './takeWhile';
import { pipe } from './pipe';

describe('data_first', () => {
  it('takeWhile', () => {
    expect(takeWhile([1, 2, 3, 4, 3, 2, 1] as const, x => x !== 4)).toEqual([
      1,
      2,
      3,
    ]);
  });
});

describe('data_last', () => {
  it('takeWhile', () => {
    expect(
      pipe(
        [1, 2, 3, 4, 3, 2, 1] as const,
        takeWhile(x => x !== 4)
      )
    ).toEqual([1, 2, 3]);
  });
});