Reset page

[UziTech]

Summary

Add jestPuppeteer.resetPage() function to reset the global.page object according to the configuration.

global.page is is setup based on the configuration.

if (config && config.exitOnPageError) { 
  this.global.page.addListener('pageerror', handleError) 
} 

This will allow the page to be reset by the user and ensure the global.page object will be the same after this call as the when it was first setup.

Users can reset the global.page object before each test by calling jestPuppeteer.resetPage() in a beforeEach function easily.

beforeEach(async () => {
  await jestPuppeteer.resetPage()
})

fixes #75 (comment)

Test plan

describe('resetPage', () => {
  test('should reset page', async () => {
    const oldPage = page
    await jestPuppeteer.resetPage()
    expect(page).not.toBe(oldPage)
    expect(page.isClosed()).toBe(false)
    expect(oldPage.isClosed()).toBe(true)
  })
})

[UziTech]

We could also reset global.browser and global.context but I'm not sure if we should.

[gregberge]

Thanks! Awesome!

[mkopeyka]

How to reset browser after each describe block? I have a problem with test of login page because session stays authenticated.

[UziTech]

I submitted a PR for a jestPuppeteer.resetBrowser() function #237

[gregberge]

Thanks!