开玩笑:当第三方库使用控制台时，如何模拟控制台? [英] Jest: how to mock console when it is used by a third-party-library?

问题描述

我正在尝试模拟console.warn/error，但我不能.我使用了一个第三方库，该库在其中调用console.warn.我需要测试它是否被调用.在我的测试案例中，我试图对console.warn进行存根处理，但这没有帮助.之后，我尝试手动模拟控制台，但也没有解决问题.

I am trying to mock console.warn/error but i can't. I use a third-party-library which calls console.warn inside it. I need to test was it called or wasn't. In my test case i was trying to stub console.warn but it didn't help. After that i was trying to mock console manually it didn't work out either.

console.warn = jest.fn();
testSchema('/app/components/Users/UserItem/UserItemContainer.js');
expect(console.warn).toBeCalled();

没用

console.warn = jest.fn();
testSchema('/app/components/Users/UserItem/UserItemContainer.js');
console.warn('error');
expect(console.warn).toBeCalled();

工作了.但是我仍然在终端中看到console.warn node_modules/babel-relay-plugin/lib/getBabelRelayPlugin.js:138.谁能帮我吗?

did work. But i still see console.warn node_modules/babel-relay-plugin/lib/getBabelRelayPlugin.js:138 in the terminal. Can anyone help me?

推荐答案

您必须使用global来访问全局上下文中的对象

You have to use global to access objects in the global context

global.console = {warn: jest.fn()}
expect(console.warn).toBeCalled()

或使用添加在19.0.0

jest.spyOn(global.console, 'warn')

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