discourse/spec/services/word_watcher_spec.rb

# frozen_string_literal: true

require 'rails_helper'

describe WordWatcher do

  let(:raw) { "Do you like liquorice?\n\nI really like them. One could even say that I am *addicted* to liquorice. Anf if\nyou can mix it up with some anise, then I'm in heaven ;)" }

  after do
    $redis.flushall
  end

  describe "word_matches_for_action?" do
    it "is falsey when there are no watched words" do
      expect(WordWatcher.new(raw).word_matches_for_action?(:require_approval)).to be_falsey
    end

    context "with watched words" do
      fab!(:anise) { Fabricate(:watched_word, word: "anise", action: WatchedWord.actions[:require_approval]) }

      it "is falsey without a match" do
        expect(WordWatcher.new("No liquorice for me, thanks...").word_matches_for_action?(:require_approval)).to be_falsey
      end

      it "is returns matched words if there's a match" do
        m = WordWatcher.new(raw).word_matches_for_action?(:require_approval)
        expect(m).to be_truthy
        expect(m[1]).to eq(anise.word)
      end

      it "finds at start of string" do
        m = WordWatcher.new("#{anise.word} is garbage").word_matches_for_action?(:require_approval)
        expect(m[1]).to eq(anise.word)
      end

      it "finds at end of string" do
        m = WordWatcher.new("who likes #{anise.word}").word_matches_for_action?(:require_approval)
        expect(m[1]).to eq(anise.word)
      end

      it "finds non-letters in place of letters" do
        Fabricate(:watched_word, word: "co(onut", action: WatchedWord.actions[:require_approval])
        m = WordWatcher.new("This co(onut is delicious.").word_matches_for_action?(:require_approval)
        expect(m[1]).to eq("co(onut")
      end

      it "handles * for wildcards" do
        Fabricate(:watched_word, word: "a**le*", action: WatchedWord.actions[:require_approval])
        m = WordWatcher.new("I acknowledge you.").word_matches_for_action?(:require_approval)
        expect(m[1]).to eq("acknowledge")
      end

      context "word boundary" do
        it "handles word boundary" do
          Fabricate(:watched_word, word: "love", action: WatchedWord.actions[:require_approval])
          expect(WordWatcher.new("I Love, bananas.").word_matches_for_action?(:require_approval)[1]).to eq("Love")
          expect(WordWatcher.new("I LOVE; apples.").word_matches_for_action?(:require_approval)[1]).to eq("LOVE")
          expect(WordWatcher.new("love: is a thing.").word_matches_for_action?(:require_approval)[1]).to eq("love")
          expect(WordWatcher.new("I love. oranges").word_matches_for_action?(:require_approval)[1]).to eq("love")
          expect(WordWatcher.new("I :love. pineapples").word_matches_for_action?(:require_approval)[1]).to eq("love")
          expect(WordWatcher.new("peace ,love and understanding.").word_matches_for_action?(:require_approval)[1]).to eq("love")
        end
      end

      context "emojis" do
        it "handles emoji" do
          Fabricate(:watched_word, word: ":joy:", action: WatchedWord.actions[:require_approval])
          m = WordWatcher.new("Lots of emojis here :joy:").word_matches_for_action?(:require_approval)
          expect(m[1]).to eq(":joy:")
        end

        it "handles unicode emoji" do
          Fabricate(:watched_word, word: "🎃", action: WatchedWord.actions[:require_approval])
          m = WordWatcher.new("Halloween party! 🎃").word_matches_for_action?(:require_approval)
          expect(m[1]).to eq("🎃")
        end

        it "handles emoji skin tone" do
          Fabricate(:watched_word, word: ":woman:t5:", action: WatchedWord.actions[:require_approval])
          m = WordWatcher.new("To Infinity and beyond! 🚀 :woman:t5:").word_matches_for_action?(:require_approval)
          expect(m[1]).to eq(":woman:t5:")
        end
      end

      context "regular expressions" do
        before do
          SiteSetting.watched_words_regular_expressions = true
        end

        it "supports regular expressions on word boundaries" do
          Fabricate(
            :watched_word,
            word: /\btest\b/,
            action: WatchedWord.actions[:block]
          )
          m = WordWatcher.new("this is not a test.").word_matches_for_action?(:block)
          expect(m[1]).to eq("test")
        end

        it "supports regular expressions as a site setting" do
          Fabricate(
            :watched_word,
            word: /tro[uo]+t/,
            action: WatchedWord.actions[:require_approval]
          )
          m = WordWatcher.new("Evil Trout is cool").word_matches_for_action?(:require_approval)
          expect(m[1]).to eq("Trout")
          m = WordWatcher.new("Evil Troot is cool").word_matches_for_action?(:require_approval)
          expect(m[1]).to eq("Troot")
          m = WordWatcher.new("trooooooooot").word_matches_for_action?(:require_approval)
          expect(m[1]).to eq("trooooooooot")
        end

        it "support uppercase" do
          Fabricate(
            :watched_word,
            word: /a\S+ce/,
            action: WatchedWord.actions[:require_approval]
          )

          m = WordWatcher.new('Amazing place').word_matches_for_action?(:require_approval)
          expect(m).to be_nil
          m = WordWatcher.new('Amazing applesauce').word_matches_for_action?(:require_approval)
          expect(m[1]).to eq('applesauce')
          m = WordWatcher.new('Amazing AppleSauce').word_matches_for_action?(:require_approval)
          expect(m[1]).to eq('AppleSauce')
        end
      end

    end
  end

end