omnivore/packages/content-handler/test/newsletter.test.ts

import 'mocha'
import * as chai from 'chai'
import { expect } from 'chai'
import chaiAsPromised from 'chai-as-promised'
import chaiString from 'chai-string'
import { SubstackHandler } from '../src/newsletters/substack-handler'
import { AxiosHandler } from '../src/newsletters/axios-handler'
import { BloombergNewsletterHandler } from '../src/newsletters/bloomberg-newsletter-handler'
import { GolangHandler } from '../src/newsletters/golang-handler'
import { MorningBrewHandler } from '../src/newsletters/morning-brew-handler'
import nock from 'nock'
import { generateUniqueUrl } from '../src/content-handler'
import fs from 'fs'
import { BeehiivHandler } from '../src/newsletters/beehiiv-handler'
import { ConvertkitHandler } from '../src/newsletters/convertkit-handler'

chai.use(chaiAsPromised)
chai.use(chaiString)

const load = (path: string): string => {
  return fs.readFileSync(path, 'utf8')
}

describe('Newsletter email test', () => {
  describe('#getNewsletterUrl()', () => {
    it('returns url when email is from SubStack', async () => {
      const rawUrl = '<https://hongbo130.substack.com/p/tldr>'

      await expect(
        new SubstackHandler().parseNewsletterUrl(rawUrl, '')
      ).to.eventually.equal('https://hongbo130.substack.com/p/tldr')
    })

    it('returns url when email is from Axios', async () => {
      const url = 'https://axios.com/blog/the-best-way-to-build-a-web-app'
      const html = `View in browser at <a>${url}</a>`

      await expect(
        new AxiosHandler().parseNewsletterUrl('', html)
      ).to.eventually.equal(url)
    })

    it('returns url when email is from Bloomberg', async () => {
      const url = 'https://www.bloomberg.com/news/google-is-now-a-partner'
      const html = `
        <a class="view-in-browser__url" href="${url}">
        View in browser
        </a>
      `

      await expect(
        new BloombergNewsletterHandler().parseNewsletterUrl('', html)
      ).to.eventually.equal(url)
    })

    it('returns url when email is from Golang Weekly', async () => {
      const url = 'https://www.golangweekly.com/first'
      const html = `
        <a href="${url}" style="text-decoration: none">Read on the Web</a>
      `

      await expect(
        new GolangHandler().parseNewsletterUrl('', html)
      ).to.eventually.equal(url)
    })

    it('returns url when email is from Morning Brew', async () => {
      const url = 'https://www.morningbrew.com/daily/issues/first'
      const html = `
        <a style="color: #000000; text-decoration: none;" target="_blank" rel="noopener" href="${url}">View Online</a>
      `

      await expect(
        new MorningBrewHandler().parseNewsletterUrl('', html)
      ).to.eventually.equal(url)
    })
  })

  describe('get author from email address', () => {
    it('returns author when email is from Substack', () => {
      const from = 'Jackson Harper from Omnivore App <jacksonh@substack.com>'
      expect(new AxiosHandler().parseAuthor(from)).to.equal(
        'Jackson Harper from Omnivore App'
      )
    })

    it('returns author when email is from Axios', () => {
      const from = 'Mike Allen <mike@axios.com>'
      expect(new AxiosHandler().parseAuthor(from)).to.equal('Mike Allen')
    })
  })

  describe('isProbablyNewsletter', () => {
    it('returns true for substack newsletter', async () => {
      const html = load('./test/data/substack-forwarded-newsletter.html')
      await expect(
        new SubstackHandler().isNewsletter({
          html,
          postHeader: '',
          from: '',
          unSubHeader: '',
        })
      ).to.eventually.be.true
    })
    it('returns true for private forwarded substack newsletter', async () => {
      const html = load(
        './test/data/substack-private-forwarded-newsletter.html'
      )
      await expect(
        new SubstackHandler().isNewsletter({
          html,
          postHeader: '',
          from: '',
          unSubHeader: '',
        })
      ).to.eventually.be.true
    })
    it('returns false for substack welcome email', async () => {
      const html = load('./test/data/substack-forwarded-welcome-email.html')
      await expect(
        new SubstackHandler().isNewsletter({
          html,
          postHeader: '',
          from: '',
          unSubHeader: '',
        })
      ).to.eventually.be.false
    })
    it('returns true for beehiiv.com newsletter', async () => {
      const html = load('./test/data/beehiiv-newsletter.html')
      await expect(
        new BeehiivHandler().isNewsletter({
          html,
          postHeader: '',
          from: '',
          unSubHeader: '',
        })
      ).to.eventually.be.true
    })
    it('returns true for milkroad newsletter', async () => {
      const html = load('./test/data/milkroad-newsletter.html')
      await expect(
        new BeehiivHandler().isNewsletter({
          html,
          postHeader: '',
          from: '',
          unSubHeader: '',
        })
      ).to.eventually.be.true
    })
    it('returns true for convertkit newsletter', async () => {
      const html = load('./test/data/convertkit-newsletter.html')
      await expect(
        new ConvertkitHandler().isNewsletter({
          html,
          postHeader: '',
          from: '',
          unSubHeader: '',
        })
      ).to.eventually.be.true
    })
  })

  describe('findNewsletterUrl', async () => {
    context('when email is from Substack', () => {
      before(() => {
        nock('https://email.mg2.substack.com')
          .head(
            '/c/eJxNkk2TojAQhn-N3KTyQfg4cGDGchdnYcsZx9K5UCE0EMVAkTiKv36iHnarupNUd7rfVJ4W3EDTj1M89No496Uw0wCxgovuwBgYnbOGsZBVjDHzKPWYU8VehUMWOlIX9Qhw4rKLzXgGZziXnRTcyF7dK0iIGMVOG_OS1aTmKPRDilgVhTQUPCQIcE0x-MFTmJ8rCUpA3KtuenR2urg1ZtAzmszI0tq_Z7m66y-ilQo0uAqMTQ7WRX8auJKg56blZg7WB-iHDuYEBzO6NP0R1IwuYFphQbbTjnTH9NBfs80nym4Zyj8uUvyKbtUyGr5eUz9fNDQ7JCxfJDo9dW1lY9lmj_JNivPbGmf2Pt_lN9tDit9b-WeTetni85Z9pDpVOd7L1E_Vy7egayNO23ZP34eSeLJeux1b0rer_xaZ7ykS78nuSjMY-nL98rparNZNcv07JCjN06_EkTFBxBqOUMACErnELUNMSxTUjLDQZwzcqa4bRjCfeejUEFefS224OLr2S5wxPtij7lVrs80d2CNseRV2P52VNFMBipcdVE-U5jkRD7hFAwpGOylVwU2Mfc9qBh7DoR89yVnWXhgQFHnIsbpVb6tU_B-hH_2yzWY'
          )
          .reply(302, undefined, {
            Location:
              'https://newsletter.slowchinese.net/p/companies-that-eat-people-217',
          })
          nock('https://newsletter.slowchinese.net')
            .head('/p/companies-that-eat-people-217')
            .reply(200, '')
      })
      after(() => {
        nock.restore()
      })

      it('gets the URL from the header', async () => {
        const html = load('./test/data/substack-forwarded-newsletter.html')
        const url = await new SubstackHandler().findNewsletterUrl(html)
        // Not sure if the redirects from substack expire, this test could eventually fail
        expect(url).to.startWith(
          'https://newsletter.slowchinese.net/p/companies-that-eat-people-217'
        )
      })
    })

    context('when email is from beehiiv', () => {
      before(() => {
        nock('https://u23463625.ct.sendgrid.net')
          .head(
            '/ss/c/AX1lEgEQaxtvFxLaVo0GBo_geajNrlI1TGeIcmMViR3pL3fEDZnbbkoeKcaY62QZk0KPFudUiUXc_uMLerV4nA/3k5/3TFZmreTR0qKSCgowABnVg/h30/zzLik7UXd1H_n4oyd5W8Xu639AYQQB2UXz-CsssSnno'
          )
          .reply(302, undefined, {
            Location: 'https://www.milkroad.com/p/talked-guy-spent-30m-beeple',
          })
          .get('/p/talked-guy-spent-30m-beeple')
          .reply(200, '')
      })

      after(() => {
        nock.restore()
      })

      it('gets the URL from the header', async () => {
        const html = load('./test/data/beehiiv-newsletter.html')
        const url = await new BeehiivHandler().findNewsletterUrl(html)
        expect(url).to.startWith(
          'https://www.milkroad.com/p/talked-guy-spent-30m-beeple'
        )
      }).timeout(10000)
    })

    context('when email is from convertkit', () => {
      before(() => {
        nock('https://u25184427.ct.sendgrid.net')
          .head(
            '/ls/click?upn=MnmHBiCwIPe9TmIJeskmA7wDTJvdVU1ACmSJ753YuhScf71JWthxqM8RnVh-2FZG0rYzrbR04P99S2ld2OkTtQmrx2FDwArpYdk5N0jVpN9dLBZ-2BdPNqkRHxNvuygY8-2F-2FtRNFoPjxjtTuyWM6L3tcYDYnAnL2xCueddWcFlUNrQWsvLotmgvC-2BrQc7bxsZhW0pUBmS_vVXscVLXlj5UtQe3aqo5RMTdTq2PepdZjP86UOmA8nzSBnnaDN-2FNHWDodWnbUOPZ063v3w3z8QtcaPpE1qNu8xYkNJJFb-2F1uZEG-2BzsLfyDkjvvVX5zYs5OyyRYlhMOlXDJcr4-2FtMrFwii0uFAvwbhxDdnTxEpi-2F7maufyH39AEO-2BtCeSUg5V4FM43UpI1zUSXeWK-2Fh5JumSmR5XhrrRAig-3D-3D'
          )
          .reply(302, undefined, {
            Location: 'https://fs.blog/brain-food/october-16-2022/',
          })
          .get('/brain-food/october-16-2022/')
          .reply(200, '')
      })

      after(() => {
        nock.restore()
      })

      it('gets the URL from the header', async () => {
        const html = load('./test/data/convertkit-newsletter.html')
        const url = await new ConvertkitHandler().findNewsletterUrl(html)
        expect(url).to.startWith('https://fs.blog/brain-food/october-16-2022/')
      }).timeout(10000)
    })

    it('returns undefined if it is not a newsletter', async () => {
      const html = load('./test/data/substack-forwarded-welcome-email.html')
      const url = await new SubstackHandler().findNewsletterUrl(html)
      expect(url).to.be.undefined
    })
  })

  describe('generateUniqueUrl', () => {
    it('generates a unique URL', () => {
      const url1 = generateUniqueUrl()
      const url2 = generateUniqueUrl()

      expect(url1).to.not.eql(url2)
    })
  })
})