/
object.test.ts
66 lines (58 loc) · 1.8 KB
/
object.test.ts
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import { describe, expect, it } from 'vitest'
import { deepMerge, objectMap } from './object'
it('objectMap', () => {
expect(objectMap({}, (...args) => args)).toEqual({})
expect(
objectMap(
{ a: 1, b: 2 },
(k, v) => [k.toString().toUpperCase(), v.toString()],
),
).toEqual({ A: '1', B: '2' })
expect(
objectMap(
{ a: 1, b: 2 },
() => undefined,
),
).toEqual({})
expect(
objectMap(
{ a: 1, b: 2 },
(k, v) => k === 'a' ? undefined : [k, v],
),
).toEqual({ b: 2 })
expect(
objectMap(
{ a: 1, b: 2 },
(k, v) => [v, k],
),
).toEqual({ 1: 'a', 2: 'b' })
})
describe('deepMerge', () => {
it('should merge Objects and all nested Ones', () => {
const obj1 = { a: { a1: 'A1' }, c: 'C', d: {} }
const obj2 = { a: { a2: 'A2' }, b: { b1: 'B1' }, d: null } as any
const obj3 = { a: { a1: 'A1', a2: 'A2' }, b: { b1: 'B1' }, c: 'C', d: null }
expect(deepMerge({}, obj1, obj2)).toEqual(obj3)
})
it('should behave like Object.assign on the top level', () => {
const obj1 = { a: { a1: 'A1' }, c: 'C' }
const obj2 = { a: undefined, b: { b1: 'B1' } }
const merged = deepMerge(obj1, obj2)
expect(merged).toEqual(Object.assign({}, obj1, obj2))
})
it('should not merge array values, just override', () => {
const obj1 = { a: ['A', 'B'] }
const obj2 = { a: ['C'], b: ['D'] }
expect(deepMerge({}, obj1, obj2)).toEqual({ a: ['C'], b: ['D'] })
})
it('prototype pollution 1', () => {
const obj = {} as any
const obj2 = {} as any
const payload = JSON.parse('{"__proto__":{"polluted":"Polluted!"}}')
expect(obj.polluted).toBeUndefined()
expect(obj2.polluted).toBeUndefined()
deepMerge(obj, payload)
expect(obj.polluted).toBeUndefined()
expect(obj2.polluted).toBeUndefined()
})
})