jestjs

问题 Going through using react testing library with reach-router https://testing-library.com/docs/example-reach-router function renderWithRouter( ui, { route = '/', history = createHistory(createMemorySource(route)) } = {} ) Second argument to the function , suspect is an object, {} . But '=' is used instead of ':' means its not a name-value pair. So what is it? Also, what is the purpose of the assignment operator between two objects { route = '/', history = createHistory(createMemorySource(route)

问题 Going through using react testing library with reach-router https://testing-library.com/docs/example-reach-router function renderWithRouter( ui, { route = '/', history = createHistory(createMemorySource(route)) } = {} ) Second argument to the function , suspect is an object, {} . But '=' is used instead of ':' means its not a name-value pair. So what is it? Also, what is the purpose of the assignment operator between two objects { route = '/', history = createHistory(createMemorySource(route)

问题 Am new to react and am trying to run unit test for a react app using jest, The app using the Flux pattern and I have already wrote one component "WEATHER" and before move on to another one I wanted to write test for that component and take TDD approach. My code running fine but the test fail with this error TypeError: tree.props.onChange is not a function The weather component code : // @flow import React from 'react'; import api from '../api'; import weatherStore from '../stores/weatherStore

问题 Am new to react and am trying to run unit test for a react app using jest, The app using the Flux pattern and I have already wrote one component "WEATHER" and before move on to another one I wanted to write test for that component and take TDD approach. My code running fine but the test fail with this error TypeError: tree.props.onChange is not a function The weather component code : // @flow import React from 'react'; import api from '../api'; import weatherStore from '../stores/weatherStore

问题 I type: npm test and I get: It's interesting to note that the import statement works inside the BootScene.test.js file but it doesn't work in the imported file. I focused on the import statement not working under JEst. So I thought maybe it has something to do with Ecma Script version jest uses. So I tried this solution but the error persists. This is the repo/branch of this question. When I type npm start . Everything flows swiftly and with no errors. 回答1: I solved it by following this

问题 I have the following component... export default class TextInput extends PureComponent<TextInputProps> { private handleOnChange = (event: OnChangeEvent): void => { if (!this.props.disabled && this.props.onChange) { this.props.onChange(event) } } private handleOnBlur = (event: OnBlurEvent): void => { if (!this.props.disabled && this.props.onBlur) { this.props.onBlur(event) } } public render(): ReactNode { return ( <Styled.TextInput id={this.props.id} type={this.props.type} onChange={this

问题 I have the following component... export default class TextInput extends PureComponent<TextInputProps> { private handleOnChange = (event: OnChangeEvent): void => { if (!this.props.disabled && this.props.onChange) { this.props.onChange(event) } } private handleOnBlur = (event: OnBlurEvent): void => { if (!this.props.disabled && this.props.onBlur) { this.props.onBlur(event) } } public render(): ReactNode { return ( <Styled.TextInput id={this.props.id} type={this.props.type} onChange={this

问题 I have to mount a component that uses a function from library. The function is used in the componentDidMount cycle. Everything looks somewhat like this: import * as React from 'react'; import * as dayjs from 'dayjs'; class MyComponent extends React.Component { constructor(props) { super(props); this.slider = null; } componentDidMount() { this.setupValues(); } setupValues() { this.slider = { ..., format: dayjs(val).format(...) } } render() {...} } Now the wrapper that I am trying to use in my

问题 Introduction I am getting stuck with database Promises I am using inside the Jest testing framework. Things are running in the wrong order, and following some of my latest changes, Jest is not finishing correctly because an unknown asynchronous operation is not being handled. I am fairly new to Node/Jest. Here is what I am trying to do. I am setting up Jest inside a multiple Docker container environment to call internal APIs in order to test their JSON outputs, and to run service functions in

问题 Introduction I am getting stuck with database Promises I am using inside the Jest testing framework. Things are running in the wrong order, and following some of my latest changes, Jest is not finishing correctly because an unknown asynchronous operation is not being handled. I am fairly new to Node/Jest. Here is what I am trying to do. I am setting up Jest inside a multiple Docker container environment to call internal APIs in order to test their JSON outputs, and to run service functions in