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ghengeveld/hello.spec.jsx

Created August 28, 2019 20:55
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  1. ghengeveld created this gist Aug 28, 2019.
    30 changes: 30 additions & 0 deletions hello.spec.jsx
    View file
    Original file line number Diff line number Diff line change
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    import React from "react"
    import { render, unmountComponentAtNode } from "react-dom"
    import { act } from "react-dom/test-utils"

    let container = null

    beforeEach(() => {
    // setup a DOM element as a render target
    container = document.createElement("div")
    document.body.appendChild(container)
    })

    afterEach(() => {
    // cleanup on exiting
    unmountComponentAtNode(container)
    container.remove()
    container = null
    })

    const Hello = () => {
    const promise = Promise.reject("Oh no!")
    return <div>Hello world</div>
    }

    test("HelloWorld", () => {
    act(() => {
    render(<Hello />, container)
    })
    expect(container.textContent).toBe("Hello world")
    })