updeep-remeda/test/updateIn-spec.js

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import { expect } from 'chai';
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import u from '../lib';
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describe('u.updateIn', () => {
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it('can update a single path described with a string', () => {
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const object = { a: { b: 0 } };
const result = u.updateIn('a.b', 3, object);
expect(result).to.eql({ a: { b: 3 } });
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});
it('can update a single path described with a string with a function', () => {
const inc = x => x + 1;
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const object = { a: { b: 0 } };
const result = u.updateIn('a.b', inc, object);
expect(result).to.eql({ a: { b: 1 } });
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});
it('can update a single path described with an array', () => {
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const object = { a: { b: 0 } };
const result = u.updateIn(['a', 'b'], 3, object);
expect(result).to.eql({ a: { b: 3 } });
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});
it('can update arrays', () => {
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const object = { a: [0, 0, 0] };
const result = u.updateIn('a.1', 3, object);
expect(result).to.eql({ a: [0, 3, 0] });
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});
it('can create array if all keys are numbers', () => {
const result = u.updateIn('a.0', 3, null);
expect(result).to.eql({ a: [3] });
});
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it('can be partially applied', () => {
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const object = { a: { b: 0 } };
const result = u.updateIn('a.b')(3)(object);
expect(result).to.eql({ a: { b: 3 } });
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});
it('replaces the object outright if the path is empty', () => {
const object = {};
const result = u.updateIn('', 3, object);
expect(result).to.equal(3);
});
it('freezes the result', () => {
expect(Object.isFrozen(u.updateIn('a', 0, {}))).to.be.true;
});
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});