tamda/src/list/all.spec.ts

Practical functional programming library for TypeScript

import { all } from './all';

describe('all', () => {
  it('should return whether or not all items in a list match the specified predicate', () => {
    const array = [1, 2, 3];
    const fn = (n: number) => n > 0;

    const results = [
      all(array, fn),
      all (fn) (array),
    ];

    results.forEach(result => {
      expect(result).toBe(true);
    });
  });
});