60 lines
1.7 KiB
JavaScript
60 lines
1.7 KiB
JavaScript
import { expect } from 'chai';
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import u from '../lib';
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describe('u.is', () => {
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it('returns true if path matches a value predicate', () => {
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const result = u.is('a.b', 4, { a: { b: 4 } });
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expect(result).to.be.true;
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});
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it('returns true if path matches a function predicate', () => {
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const isEven = x => x % 2 === 0;
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const result = u.is('a.b', isEven, { a: { b: 6 } });
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expect(result).to.be.true;
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});
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it('returns false if path matches a value predicate', () => {
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const result = u.is('a.b', 4, { a: { b: 5 } });
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expect(result).to.be.false;
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});
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it('returns false if path matches a function predicate', () => {
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const isEven = x => x % 2 === 0;
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const result = u.is('a.b', isEven, { a: { b: 7 } });
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expect(result).to.be.false;
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});
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it('returns false if the path does not exist', () => {
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const result = u.is('a.b.c.d', 4, { a: { b: {} } });
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expect(result).to.be.false;
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});
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it('can test for undefined', () => {
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const result = u.is('a.b.c', undefined, { a: { b: {} } });
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expect(result).to.be.true;
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});
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it('tests the actual object if a blank path is given', () => {
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const result = u.is('', 4, 4);
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expect(result).to.be.true;
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});
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it('can use arrays as paths', () => {
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const result = u.is(['a', 'b'], 4, { a: { b: 4 } });
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expect(result).to.be.true;
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});
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it('can include array indexes in paths', () => {
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let result = u.is('a.1.b', 4, { a: [{}, { b: 4 }] });
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expect(result).to.be.true;
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result = u.is(['a', 1, 'b'], 4, { a: [{}, { b: 4 }] });
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expect(result).to.be.true;
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});
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it('can be partially applied', () => {
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const result = u.is('a.b')(4)({ a: { b: 4 } });
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expect(result).to.be.true;
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});
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});
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