ts-prime/dist/es/find.test.js

A utility library for JavaScript and Typescript.

import { find } from './find';
import { pipe } from './pipe';
import { createCounter } from './_counter';
var array = [
    { a: 1, b: 1 },
    { a: 1, b: 2 },
    { a: 2, b: 1 },
    { a: 1, b: 3 },
];
var expected = { a: 1, b: 2 };
describe('data first', function () {
    test('find', function () {
        expect(find(array, function (x) { return x.b === 2; })).toEqual(expected);
    });
    test('find.indexed', function () {
        expect(find.indexed(array, function (x, idx) { return x.b === 2 && idx === 1; })).toEqual(expected);
    });
});
describe('data last', function () {
    test('find', function () {
        var counter = createCounter();
        var actual = pipe(array, counter.fn(), find(function (x) { return x.b === 2; }));
        expect(counter.count).toHaveBeenCalledTimes(2);
        expect(actual).toEqual(expected);
    });
    test('find.indexed', function () {
        var counter = createCounter();
        var actual = pipe(array, counter.fn(), find.indexed(function (x, idx) { return x.b === 2 && idx === 1; }));
        expect(counter.count).toHaveBeenCalledTimes(2);
        expect(actual).toEqual(expected);
    });
});