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testing-utils.tsx
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testing-utils.tsx
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import { render, RenderResult } from '@testing-library/react'
import { FC, useContext } from 'react'
import { BrowserRouter } from 'react-router-dom'
import { GlobalContext } from './src/GlobalContext'
import { ApiService } from './src/services/ApiService'
/**
* This method allows us to mock parts of the GlobalContext w/ ease
*
* @param functionalComp
* @param mockedContext
* @returns
*/
const renderCompWithMockedContext = (
functionalComp: FC,
mockedContext: any
): RenderResult => {
const MockedContextProvider: FC = () => {
const context = useContext(GlobalContext)
if (mockedContext.api) {
context.api = mockedContext.api as unknown as ApiService
}
if (mockedContext.setApi) {
context.setApi = mockedContext.setApi
}
if (mockedContext.title) {
context.title = mockedContext.title
}
if (mockedContext.setTitle) {
context.setTitle = mockedContext.setTitle
}
// render the Functional Component provided to us
return functionalComp({})
}
// render the context-enabled wrapper
return render(
<BrowserRouter>
<MockedContextProvider />
</BrowserRouter>
)
}
/**
* This method allows us to mock parts of the GlobalContext w/ ease
*
* @param elem
* @param mockedContext
* @returns
*/
const renderElemWithMockedContext = (
elem: JSX.Element | Element,
mockedContext: any
): RenderResult => {
const MockedContextProvider: FC = () => {
const context = useContext(GlobalContext)
if (mockedContext.api) {
context.api = mockedContext.api as unknown as ApiService
}
if (mockedContext.setApi) {
context.setApi = mockedContext.setApi
}
if (mockedContext.title) {
context.title = mockedContext.title
}
if (mockedContext.setTitle) {
context.setTitle = mockedContext.setTitle
}
// if simple Element, need to wrap in JSX tags;
// otherwise, elem is a JSX Element so just return it
return elem instanceof Element ? <>{elem}</> : elem
}
// render the context-enabled wrapper
return render(
<BrowserRouter>
<MockedContextProvider />
</BrowserRouter>
)
}
export { renderCompWithMockedContext, renderElemWithMockedContext }