Spaces:
Paused
Paused
File size: 3,770 Bytes
9ada4bc |
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 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 |
import { vi, it, expect } from 'vitest'
import { createProxy } from './createProxy'
it('does not interfere with default constructors', () => {
const ProxyClass = createProxy(
class {
constructor(public name: string) {}
},
{}
)
const instance = new ProxyClass('John')
expect(instance.name).toBe('John')
})
it('does not interfere with default getters', () => {
const proxy = createProxy({ foo: 'initial' }, {})
expect(proxy.foo).toBe('initial')
})
it('does not interfere with default setters', () => {
const proxy = createProxy({ foo: 'initial' }, {})
proxy.foo = 'next'
expect(proxy.foo).toBe('next')
})
it('does not interfere with default methods', () => {
const proxy = createProxy({ getValue: () => 'initial' }, {})
expect(proxy.getValue()).toBe('initial')
})
it('does not interfere with existing descriptors', () => {
const target = {} as { foo: string; bar: number }
let internalBar = 0
Object.defineProperties(target, {
foo: {
get: () => 'initial',
},
bar: {
set: (value) => {
internalBar = value + 10
},
},
})
const proxy = createProxy(target, {
getProperty(data, next) {
return next()
},
})
expect(proxy.foo).toBe('initial')
proxy.bar = 5
expect(proxy.bar).toBeUndefined()
expect(internalBar).toBe(15)
})
it('infer prototype descriptors', () => {
class Child {
ok: boolean
set status(nextStatus: number) {
this.ok = nextStatus >= 200 && nextStatus < 300
}
}
Object.defineProperties(Child.prototype, {
status: { enumerable: true },
})
const scope = {} as { child: typeof Child }
Object.defineProperty(scope, 'child', {
enumerable: true,
value: Child,
})
const ProxyClass = createProxy(scope.child, {})
const instance = new ProxyClass()
instance.status = 201
expect(instance.ok).toBe(true)
})
it('spies on the constructor', () => {
const OriginalClass = class {
constructor(public name: string, public age: number) {}
}
const constructorCall = vi.fn<
[ConstructorParameters<typeof OriginalClass>, Function],
typeof OriginalClass
>((args, next) => next())
const ProxyClass = createProxy(OriginalClass, {
constructorCall,
})
new ProxyClass('John', 32)
expect(constructorCall).toHaveBeenCalledTimes(1)
expect(constructorCall).toHaveBeenCalledWith(
['John', 32],
expect.any(Function)
)
})
it('spies on property getters', () => {
const getProperty = vi.fn((args, next) => next())
const proxy = createProxy({ foo: 'initial' }, { getProperty })
proxy.foo
expect(getProperty).toHaveBeenCalledTimes(1)
expect(getProperty).toHaveBeenCalledWith(['foo', proxy], expect.any(Function))
})
it('spies on property setters', () => {
const setProperty = vi.fn((args, next) => next())
const proxy = createProxy({ foo: 'initial' }, { setProperty })
proxy.foo = 'next'
expect(setProperty).toHaveBeenCalledTimes(1)
expect(setProperty).toHaveBeenCalledWith(
['foo', 'next'],
expect.any(Function)
)
})
it('spies on method calls', () => {
const methodCall = vi.fn((args, next) => next())
const proxy = createProxy(
{
greet: (name: string) => `hello ${name}`,
},
{ methodCall }
)
proxy.greet('Clair')
expect(methodCall).toHaveBeenCalledTimes(1)
expect(methodCall).toHaveBeenCalledWith(
['greet', ['Clair']],
expect.any(Function)
)
})
it('proxies properties on the prototype level', () => {
const method = vi.fn()
const prototype = { method }
const proxy = createProxy(Object.create(prototype), {})
const proxyMethod = vi.fn()
proxy.method = proxyMethod
prototype.method()
expect(method).toHaveBeenCalledTimes(0)
expect(proxyMethod).toHaveBeenCalledTimes(1)
})
|