updeep-remeda/test/map-spec.js
2016-01-13 08:19:56 -08:00

73 lines
1.6 KiB
JavaScript

import { expect } from 'chai';
import u from '../lib';
describe('u.map', () => {
it('applies updates to each item in an array', () => {
const object = [0, 1, 2];
const inc = x => x + 1;
const result = u.map(inc, object);
expect(result).to.eql([1, 2, 3]);
});
it('applies updates to each value in an object', () => {
const object = { a: 0, b: 1, c: 2 };
const inc = x => x + 1;
const result = u.map(inc, object);
expect(result).to.eql({ a: 1, b: 2, c: 3 });
});
it('can update with a regular updates object', () => {
const object = [{ a: 0 }, { a: 0 }];
const result = u.map({ a: 1 }, object);
expect(result).to.eql([{ a: 1 }, { a: 1 }]);
});
it('returns the same object if no updates are made', () => {
const array = [0, 1];
const ident = x => x;
let result = u.map(ident, array);
expect(result).to.equal(array);
const object = { a: 0 };
result = u.map(ident, object);
expect(result).to.equal(object);
});
it('passes the key or index as the second parameter to the iteratee', () => {
const object = {
a: { x: 0 },
b: [3, 3],
};
const setToKey = (_, key) => key;
const result = u.map(u.map(setToKey), object);
expect(result).to.eql({
a: { x: 'x' },
b: [0, 1],
});
});
it('can be partially applied', () => {
const object = {
b: [3, 3],
};
const setToKey = (_, key) => key;
const result = u({
b: u.map(setToKey),
}, object);
expect(result).to.eql({
b: [0, 1],
});
});
it('freezes the result', () => {
expect(Object.isFrozen(u.map({}, {}))).to.be.true;
});
});