clone-deep.spec.js
1.77 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
import { cloneDeep } from './clone-deep'
describe('cloneDeep()', () => {
it('should clone arrays', () => {
const a = [{ a: 0 }, { b: 1 }]
expect(cloneDeep(a)).toEqual(a)
const b = [1, 2, 3]
expect(b).toEqual(b)
const c = [{ a: 0 }, { b: 1 }]
const d = cloneDeep(c)
expect(d).toEqual(c)
expect(d[0]).toEqual(c[0])
const e = [0, 'a', {}, [{}], [() => {}], () => {}]
expect(cloneDeep(e)).toEqual(e)
})
it('should deeply clone an array', () => {
const a = [[{ a: 'b' }], [{ a: 'b' }]]
const b = cloneDeep(a)
expect(b).not.toBe(a)
expect(b[0]).not.toBe(a[0])
expect(b[1]).not.toBe(a[1])
expect(b).toEqual(a)
})
it('should deeply clone object', () => {
const a = { a: 'b' }
const b = cloneDeep(a)
b.c = 'd'
expect(b).not.toEqual(a)
})
it('should deeply clone arrays', () => {
const a = { a: 'b' }
const b = [a]
const c = cloneDeep(b)
a.c = 'd'
expect(c).not.toEqual(b)
})
it('should return primitives', () => {
expect(cloneDeep(0)).toEqual(0)
expect(cloneDeep('foo')).toEqual('foo')
})
it('should clone a regex', () => {
expect(cloneDeep(/foo/g)).toEqual(/foo/g)
})
it('should clone objects', () => {
const a = { a: 1, b: 2, c: 3 }
expect(cloneDeep(a)).toEqual(a)
expect(cloneDeep(a)).not.toBe(a)
})
it('should deeply clone objects', () => {
const a = { a: { a: 1, b: 2, c: 3 }, b: { a: 1, b: 2, c: 3 }, c: { a: 1, b: 2, c: 3 } }
expect(cloneDeep(a)).toEqual(a)
expect(cloneDeep(a)).not.toBe(a)
expect(cloneDeep(a).a).toEqual(a.a)
expect(cloneDeep(a).a).not.toBe(a.a)
expect(cloneDeep(a).b).toEqual(a.b)
expect(cloneDeep(a).b).not.toBe(a.b)
expect(cloneDeep(a).c).toEqual(a.c)
expect(cloneDeep(a).c).not.toBe(a.c)
})
})