require "spec_helper"

# Inspired in great part by Discourse's Email::Receiver
describe Gitlab::Email::ReplyParser, lib: true do
  describe '#execute' do
    def test_parse_body(mail_string)
      described_class.new(Mail::Message.new(mail_string)).execute
    end

    it "returns an empty string if the message is blank" do
      expect(test_parse_body("")).to eq("")
    end

    it "returns an empty string if the message is not an email" do
      expect(test_parse_body("asdf" * 30)).to eq("")
    end

    it "returns an empty string if there is no reply content" do
      expect(test_parse_body(fixture_file("emails/no_content_reply.eml"))).to eq("")
    end

    it "properly renders plaintext-only email" do
      expect(test_parse_body(fixture_file("emails/plaintext_only.eml"))).
        to eq(
          <<-BODY.strip_heredoc.chomp
            ### reply from default mail client in Windows 8.1 Metro


            The quick brown fox jumps over the lazy dog. The quick brown fox jumps over the lazy dog. The quick brown fox jumps over the lazy dog. The quick brown fox jumps over the lazy dog. The quick brown fox jumps over the lazy dog. The quick brown fox jumps over the lazy dog. The quick brown fox jumps over the lazy dog. The quick brown fox jumps over the lazy dog. The quick brown fox jumps over the lazy dog.


            This is a **bold** word in Markdown


            This is a link http://example.com
          BODY
        )
    end

    it "supports a Dutch reply" do
      expect(test_parse_body(fixture_file("emails/dutch.eml"))).to eq("Dit is een antwoord in het Nederlands.")
    end

    it "removes an 'on date wrote' quoting line" do
      expect(test_parse_body(fixture_file("emails/on_wrote.eml"))).to eq("Sure, all you need to do is frobnicate the foobar and you'll be all set!")
    end

    it "handles multiple paragraphs" do
      expect(test_parse_body(fixture_file("emails/paragraphs.eml"))).
        to eq(
          <<-BODY.strip_heredoc.chomp
            Is there any reason the *old* candy can't be be kept in silos while the new candy
            is imported into *new* silos?

            The thing about candy is it stays delicious for a long time -- we can just keep
            it there without worrying about it too much, imo.

            Thanks for listening.
          BODY
        )
    end

    it "handles multiple paragraphs when parsing html" do
      expect(test_parse_body(fixture_file("emails/html_paragraphs.eml"))).
        to eq(
          <<-BODY.strip_heredoc.chomp
            Awesome!

            Pleasure to have you here!

            :boom:
          BODY
        )
    end

    it "handles newlines" do
      expect(test_parse_body(fixture_file("emails/newlines.eml"))).
        to eq(
          <<-BODY.strip_heredoc.chomp
            This is my reply.
            It is my best reply.
            It will also be my *only* reply.
          BODY
        )
    end

    it "handles inline reply" do
      expect(test_parse_body(fixture_file("emails/inline_reply.eml"))).
        to eq(
          <<-BODY.strip_heredoc.chomp
            >     techAPJ <https://meta.discourse.org/users/techapj>
            > November 28
            >
            > Test reply.
            >
            > First paragraph.
            >
            > Second paragraph.
            >
            > To respond, reply to this email or visit
            > https://meta.discourse.org/t/testing-default-email-replies/22638/3 in
            > your browser.
            >  ------------------------------
            > Previous Replies    codinghorror
            > <https://meta.discourse.org/users/codinghorror>
            > November 28
            >
            > We're testing the latest GitHub email processing library which we are
            > integrating now.
            >
            > https://github.com/github/email_reply_parser
            >
            > Go ahead and reply to this topic and I'll reply from various email clients
            > for testing.
            >   ------------------------------
            >
            > To respond, reply to this email or visit
            > https://meta.discourse.org/t/testing-default-email-replies/22638/3 in
            > your browser.
            >
            > To unsubscribe from these emails, visit your user preferences
            > <https://meta.discourse.org/my/preferences>.
            >

            The quick brown fox jumps over the lazy dog. The quick brown fox jumps over
            the lazy dog. The quick brown fox jumps over the lazy dog. The quick brown
            fox jumps over the lazy dog. The quick brown fox jumps over the lazy dog.
            The quick brown fox jumps over the lazy dog. The quick brown fox jumps over
            the lazy dog. The quick brown fox jumps over the lazy dog.
          BODY
        )
    end

    it "properly renders email reply from gmail web client" do
      expect(test_parse_body(fixture_file("emails/gmail_web.eml"))).
        to eq(
          <<-BODY.strip_heredoc.chomp
            ### This is a reply from standard GMail in Google Chrome.

            The quick brown fox jumps over the lazy dog. The quick brown fox jumps over
            the lazy dog. The quick brown fox jumps over the lazy dog. The quick brown
            fox jumps over the lazy dog. The quick brown fox jumps over the lazy dog.
            The quick brown fox jumps over the lazy dog. The quick brown fox jumps over
            the lazy dog. The quick brown fox jumps over the lazy dog.

            Here's some **bold** text in Markdown.

            Here's a link http://example.com
          BODY
        )
    end

    it "properly renders email reply from iOS default mail client" do
      expect(test_parse_body(fixture_file("emails/ios_default.eml"))).
        to eq(
          <<-BODY.strip_heredoc.chomp
            ### this is a reply from iOS default mail

            The quick brown fox jumps over the lazy dog. The quick brown fox jumps over the lazy dog. The quick brown fox jumps over the lazy dog. The quick brown fox jumps over the lazy dog. The quick brown fox jumps over the lazy dog. The quick brown fox jumps over the lazy dog. The quick brown fox jumps over the lazy dog.

            Here's some **bold** markdown text.

            Here's a link http://example.com
          BODY
        )
    end

    it "properly renders email reply from Android 5 gmail client" do
      expect(test_parse_body(fixture_file("emails/android_gmail.eml"))).
        to eq(
          <<-BODY.strip_heredoc.chomp
            ### this is a reply from Android 5 gmail

            The quick brown fox jumps over the lazy dog. The quick brown fox jumps over
            the lazy dog. The quick brown fox jumps over the lazy dog. The quick brown
            fox jumps over the lazy dog. The quick brown fox jumps over the lazy dog.
            The quick brown fox jumps over the lazy dog.

            This is **bold** in Markdown.

            This is a link to http://example.com
          BODY
        )
    end

    it "properly renders email reply from Windows 8.1 Metro default mail client" do
      expect(test_parse_body(fixture_file("emails/windows_8_metro.eml"))).
        to eq(
          <<-BODY.strip_heredoc.chomp
            ### reply from default mail client in Windows 8.1 Metro


            The quick brown fox jumps over the lazy dog. The quick brown fox jumps over the lazy dog. The quick brown fox jumps over the lazy dog. The quick brown fox jumps over the lazy dog. The quick brown fox jumps over the lazy dog. The quick brown fox jumps over the lazy dog. The quick brown fox jumps over the lazy dog. The quick brown fox jumps over the lazy dog. The quick brown fox jumps over the lazy dog.


            This is a **bold** word in Markdown


            This is a link http://example.com
          BODY
        )
    end

    it "properly renders email reply from MS Outlook client" do
      expect(test_parse_body(fixture_file("emails/outlook.eml"))).to eq("Microsoft Outlook 2010")
    end

    it "properly renders html-only email from MS Outlook" do
      expect(test_parse_body(fixture_file("emails/outlook_html.eml"))).to eq("Microsoft Outlook 2010")
    end
  end
end