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