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import { nextTestSetup } from 'e2e-utils'
import { check } from 'next-test-utils'
describe('custom-app-hmr', () => {
const { next } = nextTestSetup({
files: __dirname,
})
it('should not do full reload when simply editing _app.js', async () => {
const customAppFilePath = 'pages/_app.js'
const browser = await next.browser('/')
await browser.eval('window.hmrConstantValue = "should-not-change"')
const customAppContent = await next.readFile(customAppFilePath)
const newCustomAppContent = customAppContent.replace(
'hmr text origin',
'hmr text changed'
)
await next.patchFile(customAppFilePath, newCustomAppContent)
await check(async () => {
const pText = await browser.elementByCss('h1').text()
expect(pText).toBe('hmr text changed')
// Should keep the value on window, which indicates there's no full reload
const hmrConstantValue = await browser.eval('window.hmrConstantValue')
expect(hmrConstantValue).toBe('should-not-change')
return 'success'
}, 'success')
await next.patchFile(customAppFilePath, customAppContent)
await check(async () => {
const pText = await browser.elementByCss('h1').text()
expect(pText).toBe('hmr text origin')
// Should keep the value on window, which indicates there's no full reload
const hmrConstantValue = await browser.eval('window.hmrConstantValue')
expect(hmrConstantValue).toBe('should-not-change')
return 'success'
}, 'success')
})
})
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