discourse/spec/components/email_cook_spec.rb

require 'rails_helper'
require 'email_cook'
require 'pretty_text'

describe EmailCook do
  it "uses to PrettyText when there is no [plaintext] in raw" do
    raw = "**Hello world!**"
    expect(cook(raw)).to eq(PrettyText.cook(raw))
  end

  it "adds linebreaks to short lines" do
    raw = plaintext("hello\nworld\n")
    expect(cook(raw)).to eq("hello\n<br>world\n<br>")
  end

  it "doesn't add linebreaks to long lines" do
    long = plaintext(<<~LONG_EMAIL)
      Hello,

      Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nunc convallis volutpat
      risus. Nulla ac faucibus quam, quis cursus lorem. Sed rutrum eget nunc sed accumsan.
      Vestibulum feugiat mi vitae turpis tempor dignissim.
    LONG_EMAIL

    long_cooked = <<~LONG_COOKED.strip!
      Hello,
      <br>
      <br>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nunc convallis volutpat
      risus. Nulla ac faucibus quam, quis cursus lorem. Sed rutrum eget nunc sed accumsan.
      Vestibulum feugiat mi vitae turpis tempor dignissim.
      <br>
    LONG_COOKED

    expect(cook(long)).to eq(long_cooked)
  end

  it "replaces a blank line with 2 linebreaks" do
    long = plaintext(<<~LONG_EMAIL)
      Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nunc convallis volutpat
      risus.
      Nulla ac faucibus quam, quis cursus lorem. Sed rutrum eget nunc sed accumsan.

      Vestibulum feugiat mi vitae turpis tempor dignissim.

      Stet clita kasd gubergren.
    LONG_EMAIL

    long_cooked = <<~LONG_COOKED.strip!
      Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nunc convallis volutpat
      risus.
      <br>Nulla ac faucibus quam, quis cursus lorem. Sed rutrum eget nunc sed accumsan.
      <br>
      <br>Vestibulum feugiat mi vitae turpis tempor dignissim.
      <br>
      <br>Stet clita kasd gubergren.
      <br>
    LONG_COOKED

    expect(cook(long)).to eq(long_cooked)
  end

  it "escapes HTML" do
    long = plaintext(<<~LONG_EMAIL)
      Lorem ipsum dolor sit amet, consectetur adipiscing elit.

      <form name="f1" method="post" action="test.html" onsubmit="javascript:showAlert()">
      <input type="submit" name="submit" value="Click this button" />
      </form>

      Nunc convallis volutpat risus.
    LONG_EMAIL

    long_cooked = <<~LONG_COOKED.strip!
      Lorem ipsum dolor sit amet, consectetur adipiscing elit.
      <br>
      <br>&lt;form name=&quot;f1&quot; method=&quot;post&quot; action=&quot;test.html&quot; onsubmit=&quot;javascript:showAlert()&quot;&gt;
      &lt;input type=&quot;submit&quot; name=&quot;submit&quot; value=&quot;Click this button&quot; /&gt;
      &lt;/form&gt;
      <br>
      <br>Nunc convallis volutpat risus.
      <br>
    LONG_COOKED

    expect(cook(long)).to eq(long_cooked)
  end

  it "replaces indentation of more than 2 spaces with corresponding amount of non-breaking spaces" do
    nbsp = "\u00A0"
    long = plaintext(<<~LONG_EMAIL)
      Lorem ipsum dolor sit amet, consectetur adipiscing elit.

          this is indended by 4 spaces
       this is indended by 1 space
      no indentation, but lots       of spaces
    LONG_EMAIL

    long_cooked = <<~LONG_COOKED.strip!
      Lorem ipsum dolor sit amet, consectetur adipiscing elit.
      <br>
      <br>#{nbsp}#{nbsp}#{nbsp}#{nbsp}this is indended by 4 spaces
      <br> this is indended by 1 space
      <br>no indentation, but lots       of spaces
      <br>
    LONG_COOKED

    expect(cook(long)).to eq(long_cooked)
  end

  it "creates oneboxed link when the line contains only a link" do
    raw = plaintext("https://www.eviltrout.com")
    expect(cook(raw)).to eq('<a href="https://www.eviltrout.com" class="onebox" target="_blank">https://www.eviltrout.com</a><br>')
  end

  it "autolinks without the beginning of a line" do
    raw = plaintext("my site: https://www.eviltrout.com")
    expect(cook(raw)).to eq('my site: <a href="https://www.eviltrout.com">https://www.eviltrout.com</a><br>')
  end

  it "autolinks without the end of a line" do
    raw = plaintext("https://www.eviltrout.com is my site")
    expect(cook(raw)).to eq('<a href="https://www.eviltrout.com">https://www.eviltrout.com</a> is my site<br>')
  end

  it "links even within a quote" do
    raw = plaintext("> https://www.eviltrout.com is my site")
    expect(cook(raw)).to eq('<blockquote><a href="https://www.eviltrout.com">https://www.eviltrout.com</a> is my site<br></blockquote>')
  end

  it "it works and does not interpret Markdown in plaintext and elided" do
    long = <<~LONG_EMAIL
      [plaintext]
      *Lorem ipsum* dolor sit amet, consectetur adipiscing elit.
      [/plaintext]
      [attachments]
      <img src='some_image.png' width='100' height='100'>
      [/attachments]
      [elided]
      At vero eos *et accusam* et justo duo dolores et ea rebum.
      [/elided]
    LONG_EMAIL

    long_cooked = <<~LONG_COOKED
      *Lorem ipsum* dolor sit amet, consectetur adipiscing elit.<br>
      <br><img src='some_image.png' width='100' height='100'>
      <br><br>

      <details class='elided'>
      <summary title='Show trimmed content'>&#183;&#183;&#183;</summary>
      At vero eos *et accusam* et justo duo dolores et ea rebum.<br>
      </details>
    LONG_COOKED

    expect(cook(long)).to eq(long_cooked)
  end

  it "works without attachments" do
    long = <<~LONG_EMAIL
      [plaintext]
      *Lorem ipsum* dolor sit amet, consectetur adipiscing elit.
      [/plaintext]
      [elided]
      At vero eos *et accusam* et justo duo dolores et ea rebum.
      [/elided]
    LONG_EMAIL

    long_cooked = <<~LONG_COOKED
      *Lorem ipsum* dolor sit amet, consectetur adipiscing elit.<br>
      <br><br>

      <details class='elided'>
      <summary title='Show trimmed content'>&#183;&#183;&#183;</summary>
      At vero eos *et accusam* et justo duo dolores et ea rebum.<br>
      </details>
    LONG_COOKED

    expect(cook(long)).to eq(long_cooked)
  end

  def cook(raw)
    EmailCook.new(raw).cook
  end

  def plaintext(text)
    "[plaintext]\n#{text}\n[/plaintext]"
  end
end