[英]jest-mock-extended - call mock with object input [Typescript]
I'm using jest-mock-extended in my tests.我在测试中使用了jest-mock-extended 。
I would like to test the following code:我想测试以下代码:
class A {
constructor(private b: B){}
public test(x: string): string {
const res1 = this.b.compose({
name: x + '_foo'
})
const res2 = this.b.compose({
name: x + '_bar'
})
}
return res1 + '_' + res2
}
And my test:我的测试:
test(() => {
const bMock: MockProxy<B> = mock<B>()
const a: A = new A(bMock)
bMock.compose.calledWith({
x: 'yoyo_foo'
}).mockReturnValueOnce(x + '_once')
bMock.compose.calledWith({
x: 'yoyo_bar'
}).mockReturnValueOnce(x + '_twice')
//ACT
const result = a.test('yoyo')
//ASSERT
expect(result).toBe('yoyo_foo_once_yoyo_bar_twice)
})
But since the calledWith
function is using referential equality it doesn't work, the compose
function of the mocked object returns undefined
.但是由于calledWith
function 使用引用相等它不起作用,所以模拟 object 的compose
function 返回undefined
。 Is there a way to make it work?有没有办法让它工作? Maybe to enforce a shallow equality ?也许是为了强制执行肤浅的平等? I would like to be able to use the calledWith
function with an object, is there a way?我希望能够使用被称为calledWith
和 object 的调用,有没有办法? Is there another way to mock the compose function according to its input?是否有另一种方法可以根据输入来模拟 compose function?
I think you should use containsValue('value')
matcher from jest-mock-extended我认为您应该使用jest-mock-extended containsValue('value')
匹配器
in eg.ts
file在eg.ts
文件中
export interface B {
compose(obj): string
}
export class A {
constructor(private b: B) {}
public test(x: string): string {
const res1 = this.b.compose({
name: x + "_foo"
})
const res2 = this.b.compose({
name: x + "_bar"
})
return res1 + "_" + res2
}
}
in eg.test.ts
file在eg.test.ts
文件中
// libs
import { test, expect } from "@jest/globals"
import { mock, MockProxy, objectContainsValue } from "jest-mock-extended"
import { A, B } from "./eg"
test("test", () => {
const bMock: MockProxy<B> = mock<B>()
const a: A = new A(bMock)
bMock.compose
.calledWith(objectContainsValue("yoyo_foo"))
.mockReturnValueOnce("yoyo_foo" + "_once")
bMock.compose
.calledWith(objectContainsValue("yoyo_bar"))
.mockReturnValueOnce("yoyo_bar" + "_twice")
//ACT
const result = a.test("yoyo")
//ASSERT
expect(result).toBe("yoyo_foo_once_yoyo_bar_twice")
})
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