bootstrap-vue/src/utils/clone-deep.spec.js

BootstrapVue, with over 40 plugins and more than 80 custom components, provides one of the most comprehensive implementations of Bootstrap v4 components and grid system for Vue.js. With extensive and automated WAI-ARIA accessibility markup.

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)
  })
})