updeep-remeda/test/withDefault-spec.js

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import { expect } from 'chai';
import u from '../lib';
describe('u.withDefault', () => {
it('uses the default as the basis for the update if the object is undefined', () => {
const inc = x => x + 1;
const result = u.withDefault({ a: 0 }, { a: inc }, undefined);
expect(result).to.eql({ a: 1 });
});
it('uses ignores the default if the object is defined', () => {
const inc = x => x + 1;
const result = u.withDefault({ a: 0 }, { a: inc }, { a: 3 });
expect(result).to.eql({ a: 4 });
});
it('can be partially applied', () => {
const object = {};
const result = u({
foo: u.withDefault([], { 0: 'bar' }),
}, object);
expect(result).to.eql({ foo: ['bar'] });
});
it('freezes the result', () => {
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expect(Object.isFrozen(u.withDefault({}, { a: 1 })(undefined))).to.be.true;
});
});