87 lines
2.5 KiB
JavaScript
87 lines
2.5 KiB
JavaScript
import clone from '@/utils/clone'
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class Sample {
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constructor() {
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this.fieldA = 'fieldA'
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this.fieldB = 'fieldB'
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}
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doSomething () {}
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}
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describe('clone', () => {
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test.each([
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[{ a: 123, b: 'hello' }],
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[{ a: 123, b: { c: 'hello-world' } }],
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[{
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id: 123,
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addresses: [{
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street: 'Baker Street',
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building: '221b',
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}],
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}],
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])('recreates object, preserving its structure', state => {
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expect(clone(state)).toEqual(state)
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expect(clone({ ref: state }).ref === state).toBe(false)
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})
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test('retains array structures inside of a pojo', () => {
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const obj = { a: 'abc', d: ['first', 'second'] }
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expect(Array.isArray(clone(obj).d)).toBe(true)
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})
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test('removes references inside array structures', () => {
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const obj = { a: 'abc', d: ['first', { foo: 'bar' }] }
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expect(clone(obj).d[1] === obj.d[1]).toBe(false)
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})
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test('creates a copy of a date', () => {
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const date = new Date()
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const copy = clone(date)
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expect(date === copy).toBeFalsy()
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expect(copy.toISOString()).toStrictEqual(date.toISOString())
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})
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test('creates a copy of a nested date', () => {
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const date = new Date()
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const copy = clone({ date })
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expect(date === copy.date).toBeFalsy()
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expect(copy.date.toISOString()).toStrictEqual(date.toISOString())
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})
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test('creates a copy of a class instance', () => {
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const sample = new Sample()
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const copy = clone(sample)
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expect(sample === copy).toBeFalsy()
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expect(copy).toBeInstanceOf(Sample)
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expect(copy.fieldA).toEqual('fieldA')
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expect(copy.fieldB).toEqual('fieldB')
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expect(copy.doSomething).toBeTruthy()
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expect(copy.doSomething).not.toThrow()
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})
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test('creates a copy of a nested class instance', () => {
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const sample = new Sample()
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const copy = clone({ sample })
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expect(sample === copy.sample).toBeFalsy()
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expect(copy.sample).toBeInstanceOf(Sample)
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expect(copy.sample.fieldA).toEqual('fieldA')
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expect(copy.sample.fieldB).toEqual('fieldB')
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expect(copy.sample.doSomething).toBeTruthy()
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expect(copy.sample.doSomething).not.toThrow()
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})
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test('does not create a copy of a blob', () => {
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const blob = new Blob(['{"fieldA": "fieldA"}'], { type : 'application/json' })
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const copy = clone(blob)
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expect(blob === copy).toBeTruthy()
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})
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})
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