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| 1 | +import { merge } from '../../../src/utils/merge'; |
| 2 | + |
| 3 | +describe('merge', () => { |
| 4 | + it('works with empty objects', () => { |
| 5 | + const oldData = {}; |
| 6 | + const newData = {}; |
| 7 | + |
| 8 | + const actual = merge(oldData, newData); |
| 9 | + |
| 10 | + expect(actual).toEqual({}); |
| 11 | + expect(actual).toBe(oldData); |
| 12 | + expect(actual).not.toBe(newData); |
| 13 | + }); |
| 14 | + |
| 15 | + it('works with empty merge object', () => { |
| 16 | + const oldData = { aa: 'aha' }; |
| 17 | + const newData = {}; |
| 18 | + |
| 19 | + const actual = merge(oldData, newData); |
| 20 | + |
| 21 | + expect(actual).toEqual({ aa: 'aha' }); |
| 22 | + expect(actual).toBe(oldData); |
| 23 | + expect(actual).not.toBe(newData); |
| 24 | + }); |
| 25 | + |
| 26 | + it('works with arbitrary data', () => { |
| 27 | + const oldData = { |
| 28 | + old1: 'old1', |
| 29 | + old2: 'old2', |
| 30 | + obj: { key: 'value1', key1: 'value1', deep: { key: 'value' } }, |
| 31 | + } as any; |
| 32 | + const newData = { |
| 33 | + new1: 'new1', |
| 34 | + old2: 'new2', |
| 35 | + obj: { key2: 'value2', key: 'value2', deep: { key2: 'value2' } }, |
| 36 | + } as any; |
| 37 | + |
| 38 | + const actual = merge(oldData, newData); |
| 39 | + |
| 40 | + expect(actual).toEqual({ |
| 41 | + old1: 'old1', |
| 42 | + old2: 'new2', |
| 43 | + new1: 'new1', |
| 44 | + obj: { |
| 45 | + key2: 'value2', |
| 46 | + key: 'value2', |
| 47 | + key1: 'value1', |
| 48 | + deep: { key2: 'value2' }, |
| 49 | + }, |
| 50 | + }); |
| 51 | + expect(actual).not.toBe(oldData); |
| 52 | + expect(actual).not.toBe(newData); |
| 53 | + }); |
| 54 | + |
| 55 | + it.each([ |
| 56 | + [undefined, { a: 'aa' }, { a: 'aa' }], |
| 57 | + [{ a: 'aa' }, undefined, undefined], |
| 58 | + [{ a: 'aa' }, null, null], |
| 59 | + [{ a: 'aa' }, { a: undefined }, { a: undefined }], |
| 60 | + [{ a: 'aa' }, { a: null }, { a: null }], |
| 61 | + [{ a: 'aa' }, { a: '' }, { a: '' }], |
| 62 | + [ |
| 63 | + { a0: { a1: { a2: { a3: { a4: 'a4a' }, a3a: 'a3a' }, a2a: 'a2a' }, a1a: 'a1a' }, a0a: 'a0a' }, |
| 64 | + { a0: { a1: { a2: { a3: { a4: 'a4b' }, a3b: 'a3b' }, a2b: 'a2b' }, a1b: 'a1b' }, a0b: 'a0b' }, |
| 65 | + { |
| 66 | + a0: { a1: { a2: { a3: { a4: 'a4b' }, a3b: 'a3b' }, a2b: 'a2b' }, a1b: 'a1b', a1a: 'a1a' }, |
| 67 | + a0b: 'a0b', |
| 68 | + a0a: 'a0a', |
| 69 | + }, |
| 70 | + ], |
| 71 | + ])('works with %p and %p', (oldData, newData, expected) => { |
| 72 | + const actual = merge(oldData, newData as any); |
| 73 | + expect(actual).toEqual(expected); |
| 74 | + }); |
| 75 | +}); |
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