chinwagsocial/spec/models/tag_spec.rb

# frozen_string_literal: true
require 'rails_helper'

RSpec.describe Tag do
  describe 'validations' do
    it 'invalid with #' do
      expect(described_class.new(name: '#hello_world')).not_to be_valid
    end

    it 'invalid with .' do
      expect(described_class.new(name: '.abcdef123')).not_to be_valid
    end

    it 'invalid with spaces' do
      expect(described_class.new(name: 'hello world')).not_to be_valid
    end

    it 'valid with ａｅｓｔｈｅｔｉｃ' do
      expect(described_class.new(name: 'ａｅｓｔｈｅｔｉｃ')).to be_valid
    end
  end

  describe 'HASHTAG_RE' do
    subject { Tag::HASHTAG_RE }

    it 'does not match URLs with anchors with non-hashtag characters' do
      expect(subject.match('Check this out https://medium.com/@alice/some-article#.abcdef123')).to be_nil
    end

    it 'does not match URLs with hashtag-like anchors' do
      expect(subject.match('https://en.wikipedia.org/wiki/Ghostbusters_(song)#Lawsuit')).to be_nil
    end

    it 'does not match URLs with hashtag-like anchors after a numeral' do
      expect(subject.match('https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111895#c4')).to be_nil
    end

    it 'does not match URLs with hashtag-like anchors after an empty query parameter' do
      expect(subject.match('https://en.wikipedia.org/wiki/Ghostbusters_(song)?foo=#Lawsuit')).to be_nil
    end

    it 'matches #ａｅｓｔｈｅｔｉｃ' do
      expect(subject.match('this is #ａｅｓｔｈｅｔｉｃ').to_s).to eq '#ａｅｓｔｈｅｔｉｃ'
    end

    it 'matches digits at the start' do
      expect(subject.match('hello #3d').to_s).to eq '#3d'
    end

    it 'matches digits in the middle' do
      expect(subject.match('hello #l33ts35k').to_s).to eq '#l33ts35k'
    end

    it 'matches digits at the end' do
      expect(subject.match('hello #world2016').to_s).to eq '#world2016'
    end

    it 'matches underscores at the beginning' do
      expect(subject.match('hello #_test').to_s).to eq '#_test'
    end

    it 'matches underscores at the end' do
      expect(subject.match('hello #test_').to_s).to eq '#test_'
    end

    it 'matches underscores in the middle' do
      expect(subject.match('hello #one_two_three').to_s).to eq '#one_two_three'
    end

    it 'matches middle dots' do
      expect(subject.match('hello #one·two·three').to_s).to eq '#one·two·three'
    end

    it 'matches ・unicode in ぼっち・ざ・ろっく correctly' do
      expect(subject.match('testing #ぼっち・ざ・ろっく').to_s).to eq '#ぼっち・ざ・ろっく'
    end

    it 'matches ZWNJ' do
      expect(subject.match('just add #نرم‌افزار and').to_s).to eq '#نرم‌افزار'
    end

    it 'does not match middle dots at the start' do
      expect(subject.match('hello #·one·two·three')).to be_nil
    end

    it 'does not match middle dots at the end' do
      expect(subject.match('hello #one·two·three·').to_s).to eq '#one·two·three'
    end

    it 'does not match purely-numeric hashtags' do
      expect(subject.match('hello #0123456')).to be_nil
    end
  end

  describe '#to_param' do
    it 'returns name' do
      tag = Fabricate(:tag, name: 'foo')
      expect(tag.to_param).to eq 'foo'
    end
  end

  describe '.find_normalized' do
    it 'returns tag for a multibyte case-insensitive name' do
      upcase_string   = 'abcABCａｂｃＡＢＣやゆよ'
      downcase_string = 'abcabcａｂｃａｂｃやゆよ'

      tag = Fabricate(:tag, name: HashtagNormalizer.new.normalize(downcase_string))
      expect(described_class.find_normalized(upcase_string)).to eq tag
    end
  end

  describe '.matches_name' do
    it 'returns tags for multibyte case-insensitive names' do
      upcase_string   = 'abcABCａｂｃＡＢＣやゆよ'
      downcase_string = 'abcabcａｂｃａｂｃやゆよ'

      tag = Fabricate(:tag, name: HashtagNormalizer.new.normalize(downcase_string))
      expect(described_class.matches_name(upcase_string)).to eq [tag]
    end

    it 'uses the LIKE operator' do
      result = %q[SELECT "tags".* FROM "tags" WHERE LOWER("tags"."name") LIKE LOWER('100abc%')]
      expect(described_class.matches_name('100%abc').to_sql).to eq result
    end
  end

  describe '.matching_name' do
    it 'returns tags for multibyte case-insensitive names' do
      upcase_string   = 'abcABCａｂｃＡＢＣやゆよ'
      downcase_string = 'abcabcａｂｃａｂｃやゆよ'

      tag = Fabricate(:tag, name: HashtagNormalizer.new.normalize(downcase_string))
      expect(described_class.matching_name(upcase_string)).to eq [tag]
    end
  end

  describe '.find_or_create_by_names' do
    let(:upcase_string) { 'abcABCａｂｃＡＢＣやゆよ' }
    let(:downcase_string) { 'abcabcａｂｃａｂｃやゆよ' }

    it 'runs a passed block once per tag regardless of duplicates' do
      count = 0

      described_class.find_or_create_by_names([upcase_string, downcase_string]) do |_tag|
        count += 1
      end

      expect(count).to eq 1
    end
  end

  describe '.search_for' do
    it 'finds tag records with matching names' do
      tag = Fabricate(:tag, name: 'match')
      _miss_tag = Fabricate(:tag, name: 'miss')

      results = described_class.search_for('match')

      expect(results).to eq [tag]
    end

    it 'finds tag records in case insensitive' do
      tag = Fabricate(:tag, name: 'MATCH')
      _miss_tag = Fabricate(:tag, name: 'miss')

      results = described_class.search_for('match')

      expect(results).to eq [tag]
    end

    it 'finds the exact matching tag as the first item' do
      similar_tag = Fabricate(:tag, name: 'matchlater', reviewed_at: Time.now.utc)
      tag = Fabricate(:tag, name: 'match', reviewed_at: Time.now.utc)

      results = described_class.search_for('match')

      expect(results).to eq [tag, similar_tag]
    end
  end
end