46 lines
1.3 KiB
JavaScript
46 lines
1.3 KiB
JavaScript
import expect from 'expect';
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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 } };
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const result = u.updateIn('a.b', 3, object);
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expect(result).toEqual({ a: { b: 3 } });
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});
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it('can update a single path described with a string with a function', () => {
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const inc = x => x + 1;
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const object = { a: { b: 0 } };
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const result = u.updateIn('a.b', inc, object);
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expect(result).toEqual({ a: { b: 1 } });
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});
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it('can update a single path described with an array', () => {
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const object = { a: { b: 0 } };
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const result = u.updateIn(['a', 'b'], 3, object);
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expect(result).toEqual({ a: { b: 3 } });
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});
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it('can update arrays', () => {
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const object = { a: [0, 0, 0] };
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const result = u.updateIn('a.1', 3, object);
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expect(result).toEqual({ a: [0, 3, 0] });
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});
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it('can be partially applied', () => {
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const object = { a: { b: 0 } };
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const result = u.updateIn('a.b')(3)(object);
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expect(result).toEqual({ a: { b: 3 } });
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});
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it('replaces the object outright if the path is empty', () => {
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const object = {};
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const result = u.updateIn('', 3, object);
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expect(result).toBe(3);
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});
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it('freezes the result', () => {
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expect(Object.isFrozen(u.updateIn('a', 0, {}))).toBe(true);
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});
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});
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