我正在尝试使用带有Jest和React-testing-library的Mobx存储来测试我的React组件。
问题是我对如何为测试注入商店没有任何线索。
这是我的简化代码。
StaffInfo.js(component)
import React, { useState } from "react";
import { observer, inject } from "mobx-react";
const StaffInfo = props => {
const store = props.instituteStore;
const [staffs, setStaffs] = useState(store.staffs);
return (
<div>
....
</div>
);
}
export default inject(rootStore => ({
instituteStore : rootStore.instituteStore
}))(observer(StaffInfo));
index.js(Root store)
import LoginStore from "./LoginStore";
import InstituteStore from "./InstituteStore";
class RootStore {
constructor(){
this.loginStore = new LoginStore (this);
this.instituteStore = new InstituteStore(this);
}
}
export default RootStore;
InstituteStore.js(目标商店)
import { observable, action } from "mobx";
class InstituteStore {
constructor(root){
this.root = root;
}
@observable
staffs = [];
}
export default InstituteStore;
StaffInfo.test.js(测试文件)
import React from "react";
import ReactDom from "react-dom";
import { MemoryRouter } from "react-router-dom";
import { Provider } from "mobx-react";
import StaffInfo from "./StaffInfo";
import InstituteStore from "../stores/InstituteStore";
describe("Staff Component testing", () => {
test("should be rendered without crashing", () => {
const div = document.createElement("div");
ReactDOM.render(
<MemoryRouter initialEntries={["/staff"]}>
<StaffInfo instituteStore={RootStore.instituteStore} />
</MemoryRouter>,
div
);
ReactDOM.unmountComponentAtNode(div);
});
});
运行此测试文件后,错误消息就像:
TypeError : Cannot read property 'staffs' of undefined
[请告诉我代码的哪些部分有误。提前非常感谢!
Mobx-react
的Inject
用于将存储插入深子组件。这些星星由基于上下文的API Provider
提供。
因此,无论您要为子组件提供存储的地方,都使用类似的东西。
import rootStore from 'path_to_rootStore'
<Provider rootStore={rootStore}>
...
...
<App/>
...
...
<.Provider>