require 'test_helper'

class PostQueryBuilderTest < ActiveSupport::TestCase
  def assert_tag_match(posts, query)
    assert_equal(posts.map(&:id), Post.tag_match(query).pluck(:id))
  end

  setup do
    CurrentUser.user = create(:user)
    CurrentUser.ip_addr = "127.0.0.1"
  end

  teardown do
    CurrentUser.user = nil
    CurrentUser.ip_addr = nil
  end

  context "Searching:" do
    should "return posts for the age:<1minute tag" do
      post = create(:post)
      assert_tag_match([post], "age:<1minute")
    end

    should "return posts for the age:<1minute tag when the user is in Pacific time zone" do
      post = create(:post)
      Time.zone = "Pacific Time (US & Canada)"
      assert_tag_match([post], "age:<1minute")
      Time.zone = "Eastern Time (US & Canada)"
    end

    should "return posts for the age:<1minute tag when the user is in Tokyo time zone" do
      post = create(:post)
      Time.zone = "Asia/Tokyo"
      assert_tag_match([post], "age:<1minute")
      Time.zone = "Eastern Time (US & Canada)"
    end

    should "return posts for the ' tag" do
      post1 = create(:post, tag_string: "'")
      post2 = create(:post, tag_string: "aaa bbb")

      assert_tag_match([post1], "'")
    end

    should "return posts for the \\ tag" do
      post1 = create(:post, tag_string: "\\")
      post2 = create(:post, tag_string: "aaa bbb")

      assert_tag_match([post1], "\\")
    end

    should "return posts for the ( tag" do
      post1 = create(:post, tag_string: "(")
      post2 = create(:post, tag_string: "aaa bbb")

      assert_tag_match([post1], "(")
    end

    should "return posts for the ? tag" do
      post1 = create(:post, tag_string: "?")
      post2 = create(:post, tag_string: "aaa bbb")

      assert_tag_match([post1], "?")
    end

    should "return posts for the empty search" do
      post1 = create(:post)

      assert_tag_match([post1], "")
      assert_tag_match([post1], " ")
      assert_tag_match([post1], nil)
    end

    should "return posts for 1 tag" do
      post1 = create(:post, tag_string: "aaa")
      post2 = create(:post, tag_string: "aaa bbb")
      post3 = create(:post, tag_string: "bbb ccc")

      assert_tag_match([post2, post1], "aaa")
      assert_tag_match([post2, post1], " aaa ")
    end

    should "return posts for a 2 tag join" do
      post1 = create(:post, tag_string: "aaa")
      post2 = create(:post, tag_string: "aaa bbb")
      post3 = create(:post, tag_string: "bbb ccc")

      assert_tag_match([post2], "aaa bbb")
      assert_tag_match([post2], " aaa bbb ")
    end

    should "return posts for a 2 tag union" do
      post1 = create(:post, tag_string: "aaa")
      post2 = create(:post, tag_string: "aaab bbb")
      post3 = create(:post, tag_string: "bbb ccc")

      assert_tag_match([post3, post1], "~aaa ~ccc")
    end

    should "return posts for 1 tag with exclusion" do
      post1 = create(:post, tag_string: "aaa")
      post2 = create(:post, tag_string: "aaa bbb")
      post3 = create(:post, tag_string: "bbb ccc")

      assert_tag_match([post1], "aaa -bbb")
    end

    should "return posts for 1 tag with a pattern" do
      post1 = create(:post, tag_string: "aaa")
      post2 = create(:post, tag_string: "aaab bbb")
      post3 = create(:post, tag_string: "bbb ccc")

      assert_tag_match([post2, post1], "a*")
    end

    should "return posts for 2 tags, one with a pattern" do
      post1 = create(:post, tag_string: "aaa")
      post2 = create(:post, tag_string: "aaab bbb")
      post3 = create(:post, tag_string: "bbb ccc")

      assert_tag_match([post2], "a* bbb")
    end

    should "return posts for a negated pattern" do
      post1 = create(:post, tag_string: "aaa")
      post2 = create(:post, tag_string: "aaab bbb")
      post3 = create(:post, tag_string: "bbb ccc")

      assert_tag_match([post3], "-a*")
      assert_tag_match([post3], "bbb -a*")
      assert_tag_match([post3], "~bbb -a*")
      assert_tag_match([post1], "a* -*b")
      assert_tag_match([post2], "-*c -a*a")
    end

    should "ignore invalid operator syntax" do
      assert_nothing_raised do
        assert_tag_match([], "-")
        assert_tag_match([], "~")
      end
    end

    should "return posts for the id:<N> metatag" do
      posts = create_list(:post, 3)

      assert_tag_match([posts[1]], "id:#{posts[1].id}")
      assert_tag_match([posts[2]], "id:>#{posts[1].id}")
      assert_tag_match([posts[0]], "id:<#{posts[1].id}")

      assert_tag_match([posts[2], posts[0]], "-id:#{posts[1].id}")
      assert_tag_match([posts[2], posts[1]], "id:>=#{posts[1].id}")
      assert_tag_match([posts[1], posts[0]], "id:<=#{posts[1].id}")
      assert_tag_match([posts[2], posts[0]], "id:#{posts[0].id},#{posts[2].id}")

      assert_tag_match([posts[2], posts[1]], "id:#{posts[1].id}..")
      assert_tag_match([posts[1], posts[0]], "id:..#{posts[1].id}")
      assert_tag_match([posts[1], posts[0]], "id:#{posts[0].id}..#{posts[1].id}")
      assert_tag_match([posts[1], posts[0]], "id:#{posts[1].id}..#{posts[0].id}")
      assert_tag_match([posts[1], posts[0]], "id:#{posts[0].id}...#{posts[2].id}")

      assert_tag_match([], "id:#{posts[0].id} id:#{posts[2].id}")
      assert_tag_match([posts[1]], "id:>#{posts[0].id} id:<#{posts[2].id}")
    end

    should "return posts for the fav:<name> metatag" do
      user1 = create(:user)
      user2 = create(:user)
      user3 = create(:user, enable_private_favorites: true)
      post1 = as(user1) { create(:post, tag_string: "fav:true") }
      post2 = as(user2) { create(:post, tag_string: "fav:true") }
      post3 = as(user3) { create(:post, tag_string: "fav:true") }

      assert_tag_match([post1], "fav:#{user1.name}")
      assert_tag_match([post2], "fav:#{user2.name}")
      assert_tag_match([], "fav:#{user3.name}")
      assert_tag_match([], "fav:dne")

      assert_tag_match([post3, post2], "-fav:#{user1.name}")
      assert_tag_match([post3, post2, post1], "-fav:dne")

      as(user3) do
        assert_tag_match([post3], "fav:#{user3.name}")
        assert_tag_match([post2, post1], "-fav:#{user3.name}")
      end
    end

    should "return posts for the ordfav:<name> metatag" do
      post1 = create(:post, tag_string: "fav:#{CurrentUser.name}")
      post2 = create(:post, tag_string: "fav:#{CurrentUser.name}")

      assert_tag_match([post2, post1], "ordfav:#{CurrentUser.name}")
    end

    should "return posts for the pool:<name> metatag" do
      SqsService.any_instance.stubs(:send_message)

      pool1 = create(:pool, name: "test_a", category: "series")
      pool2 = create(:pool, name: "test_b", category: "collection")
      post1 = create(:post, tag_string: "pool:test_a")
      post2 = create(:post, tag_string: "pool:test_b")

      assert_tag_match([post1], "pool:#{pool1.id}")
      assert_tag_match([post2], "pool:#{pool2.id}")

      assert_tag_match([post1], "pool:TEST_A")
      assert_tag_match([post2], "pool:Test_B")
      assert_tag_match([post2], 'pool:"Test B"')
      assert_tag_match([post2], "pool:'Test B'")

      assert_tag_match([post1], "pool:test_a")
      assert_tag_match([post2], "-pool:test_a")

      assert_tag_match([], "pool:test_a pool:test_b")
      assert_tag_match([], "-pool:test_a -pool:test_b")

      assert_tag_match([post2, post1], "pool:test*")

      assert_tag_match([post2, post1], "pool:any")
      assert_tag_match([post2, post1], "-pool:none")
      assert_tag_match([], "-pool:any")
      assert_tag_match([], "pool:none")

      assert_tag_match([post1], "pool:series")
      assert_tag_match([post2], "-pool:series")
      assert_tag_match([post2], "pool:collection")
      assert_tag_match([post1], "-pool:collection")
    end

    should "return posts for the ordpool:<name> metatag" do
      posts = create_list(:post, 2, tag_string: "newpool:test")

      assert_tag_match(posts, "ordpool:test")
    end

    should "return posts for the ordpool:<name> metatag for a series pool containing duplicate posts" do
      posts = create_list(:post, 2)
      pool = create(:pool, name: "test", category: "series", post_ids: [posts[0].id, posts[1].id, posts[1].id])

      assert_tag_match([posts[0], posts[1], posts[1]], "ordpool:test")
    end

    should "return posts for the parent:<N> metatag" do
      parent = create(:post)
      child = create(:post, tag_string: "parent:#{parent.id}")

      assert_tag_match([parent], "parent:none")
      assert_tag_match([child], "-parent:none")

      assert_tag_match([child], "parent:any")
      assert_tag_match([parent], "-parent:any")

      assert_tag_match([child, parent], "parent:#{parent.id}")
      assert_tag_match([child], "parent:#{child.id}")

      assert_tag_match([], "-parent:#{parent.id}")
      assert_tag_match([], "-parent:#{child.id}")

      assert_tag_match([child], "parent:#{parent.id} parent:#{child.id}")

      assert_tag_match([child], "child:none")
      assert_tag_match([parent], "child:any")
    end

    should "return posts for the favgroup:<name> metatag" do
      post1 = create(:post)
      post2 = create(:post)
      post3 = create(:post)

      favgroup1 = create(:favorite_group, creator: CurrentUser.user, post_ids: [post1.id])
      favgroup2 = create(:favorite_group, creator: CurrentUser.user, post_ids: [post2.id])
      favgroup3 = create(:favorite_group, creator: create(:user), post_ids: [post3.id], is_public: false)

      assert_tag_match([post1], "favgroup:#{favgroup1.id}")
      assert_tag_match([post2], "favgroup:#{favgroup2.name}")
      assert_tag_match([], "favgroup:#{favgroup3.name}")
      assert_tag_match([], "favgroup:dne")

      assert_tag_match([post3, post2], "-favgroup:#{favgroup1.id}")
      assert_tag_match([post3, post1], "-favgroup:#{favgroup2.name}")
      assert_tag_match([post3, post2, post1], "-favgroup:#{favgroup3.name}")
      assert_tag_match([post3, post2, post1], "-favgroup:dne")

      assert_tag_match([post3], "-favgroup:#{favgroup1.name} -favgroup:#{favgroup2.name}")

      as(favgroup3.creator) do
        assert_tag_match([post1], "favgroup:#{favgroup1.id}")
        assert_tag_match([post2], "favgroup:#{favgroup2.id}")
        assert_tag_match([post3], "favgroup:#{favgroup3.id}")

        assert_tag_match([], "favgroup:#{favgroup1.name}")
        assert_tag_match([], "favgroup:#{favgroup2.name}")
        assert_tag_match([post3], "favgroup:#{favgroup3.name}")
      end
    end

    should "return posts for the user:<name> metatag" do
      users = create_list(:user, 2, created_at: 2.weeks.ago)
      posts = users.map { |u| create(:post, uploader: u) }

      assert_tag_match([posts[0]], "user:#{users[0].name}")
      assert_tag_match([posts[1]], "-user:#{users[0].name}")
      assert_tag_match([posts[1]], "filetype:jpg -user:#{users[0].name}")
    end

    should "return posts for the approver:<name> metatag" do
      users = create_list(:user, 2)
      posts = users.map { |u| create(:post, approver: u) }
      posts << create(:post, approver: nil)

      assert_tag_match([posts[0]], "approver:#{users[0].name}")
      assert_tag_match([posts[1]], "-approver:#{users[0].name}")
      assert_tag_match([posts[1], posts[0]], "approver:any")
      assert_tag_match([posts[2]], "approver:none")
    end

    should "return posts for the commenter:<name> metatag" do
      users = create_list(:user, 2, created_at: 2.weeks.ago)
      posts = create_list(:post, 2)
      comms = users.zip(posts).map { |u, p| as(u) { create(:comment, creator: u, post: p) } }

      assert_tag_match([posts[0]], "commenter:#{users[0].name}")
      assert_tag_match([posts[1]], "commenter:#{users[1].name}")
    end

    should "return posts for the commenter:<any|none> metatag" do
      posts = create_list(:post, 2)
      create(:comment, creator: create(:user, created_at: 2.weeks.ago), post: posts[0], is_deleted: false)
      create(:comment, creator: create(:user, created_at: 2.weeks.ago), post: posts[1], is_deleted: true)

      assert_tag_match(posts.reverse, "commenter:any")
      assert_tag_match([], "commenter:none")
    end

    should "return posts for the noter:<name> metatag" do
      users = create_list(:user, 2)
      posts = create_list(:post, 2)
      notes = users.zip(posts).map do |u, p|
        as(u) { create(:note, post: p) }
      end

      assert_tag_match([posts[0]], "noter:#{users[0].name}")
      assert_tag_match([posts[1]], "noter:#{users[1].name}")
    end

    should "return posts for the noter:<any|none> metatag" do
      posts = create_list(:post, 2)
      create(:note, post: posts[0], is_active: true)
      create(:note, post: posts[1], is_active: false)

      assert_tag_match(posts.reverse, "noter:any")
      assert_tag_match([], "noter:none")
    end

    should "return posts for the note_count:<N> metatag" do
      posts = create_list(:post, 3)
      create(:note, post: posts[0], is_active: true)
      create(:note, post: posts[1], is_active: false)

      assert_tag_match([posts[1], posts[0]], "note_count:1")
      assert_tag_match([posts[0]], "active_note_count:1")
      assert_tag_match([posts[1]], "deleted_note_count:1")

      assert_tag_match([posts[1], posts[0]], "notes:1")
      assert_tag_match([posts[0]], "active_notes:1")
      assert_tag_match([posts[1]], "deleted_notes:1")
    end

    should "return posts for the commentaryupdater:<name> metatag" do
      user1 = create(:user)
      user2 = create(:user)
      post1 = create(:post)
      post2 = create(:post)
      artcomm1 = as(user1) { create(:artist_commentary, post: post1) }
      artcomm2 = as(user2) { create(:artist_commentary, post: post2) }

      assert_tag_match([post1], "commentaryupdater:#{user1.name}")
      assert_tag_match([post2], "commentaryupdater:#{user2.name}")
      assert_tag_match([post2], "-commentaryupdater:#{user1.name}")
      assert_tag_match([post1], "-commentaryupdater:#{user2.name}")

      assert_tag_match([post1], "artcomm:#{user1.name}")
      assert_tag_match([post2], "artcomm:#{user2.name}")
      assert_tag_match([post2], "-artcomm:#{user1.name}")
      assert_tag_match([post1], "-artcomm:#{user2.name}")

      assert_tag_match([post2, post1], "commentaryupdater:any")
      assert_tag_match([], "commentaryupdater:none")
    end

    should "return posts for the commentary:<query> metatag" do
      post1 = create(:post)
      post2 = create(:post)
      post3 = create(:post)
      post4 = create(:post)

      artcomm1 = create(:artist_commentary, post: post1, translated_title: "azur lane")
      artcomm2 = create(:artist_commentary, post: post2, translated_title: "", translated_description: "")
      artcomm3 = create(:artist_commentary, post: post3, original_title: "", original_description: "", translated_title: "", translated_description: "")

      assert_tag_match([post2, post1], "commentary:true")
      assert_tag_match([post4, post3], "commentary:false")

      assert_tag_match([post4, post3], "-commentary:true")
      assert_tag_match([post2, post1], "-commentary:false")

      assert_tag_match([post1], "commentary:translated")
      assert_tag_match([post4, post3, post2], "-commentary:translated")

      assert_tag_match([post2], "commentary:untranslated")
      assert_tag_match([post4, post3, post1], "-commentary:untranslated")

      assert_tag_match([post1], 'commentary:"azur lane"')
      assert_tag_match([post4, post3, post2], '-commentary:"azur lane"')
    end

    should "return posts for the date:<d> metatag" do
      post = create(:post, created_at: Time.parse("2017-01-01 12:00"))

      assert_tag_match([post], "date:2017-01-01")
    end

    should "return posts for the age:<n> metatag" do
      post = create(:post)

      assert_tag_match([post], "age:<60")
      assert_tag_match([post], "age:<60s")
      assert_tag_match([post], "age:<1mi")
      assert_tag_match([post], "age:<1h")
      assert_tag_match([post], "age:<1d")
      assert_tag_match([post], "age:<1w")
      assert_tag_match([post], "age:<1mo")
      assert_tag_match([post], "age:<1y")

      assert_tag_match([post], "age:<=1y")
      assert_tag_match([post], "age:>0s")
      assert_tag_match([post], "age:>=0s")
      assert_tag_match([post], "age:0s..1m")
      assert_tag_match([post], "age:1m..0s")

      assert_tag_match([], "age:>1y")
      assert_tag_match([], "age:>=1y")
      assert_tag_match([], "age:1y..2y")
      assert_tag_match([], "age:>1y age:<1y")
    end

    should "return posts for the ratio:<x:y> metatag" do
      post = create(:post, image_width: 1000, image_height: 500)

      assert_tag_match([post], "ratio:2:1")
      assert_tag_match([post], "ratio:2.0")
    end

    should "return posts for the status:<type> metatag" do
      pending = create(:post, is_pending: true)
      flagged = create(:post, is_flagged: true)
      deleted = create(:post, is_deleted: true)
      banned  = create(:post, is_banned: true)
      all = [banned, deleted, flagged, pending]

      assert_tag_match([flagged, pending], "status:modqueue")
      assert_tag_match([pending], "status:pending")
      assert_tag_match([flagged], "status:flagged")
      assert_tag_match([deleted], "status:deleted")
      assert_tag_match([banned],  "status:banned")
      assert_tag_match([banned], "status:active")
      assert_tag_match([banned], "status:active status:banned")
      assert_tag_match(all, "status:any")
      assert_tag_match(all, "status:all")

      assert_tag_match(all - [flagged, pending], "-status:modqueue")
      assert_tag_match(all - [pending], "-status:pending")
      assert_tag_match(all - [flagged], "-status:flagged")
      assert_tag_match(all - [deleted], "-status:deleted")
      assert_tag_match(all - [banned],  "-status:banned")
      assert_tag_match(all - [banned], "-status:active")

      assert_tag_match([], "status:garbage")
      assert_tag_match(all, "-status:garbage")
    end

    should "return posts for the status:unmoderated metatag" do
      flagged = create(:post, is_flagged: true)
      pending = create(:post, is_pending: true)
      disapproved = create(:post, is_pending: true)

      create(:post_flag, post: flagged, creator: create(:user, created_at: 2.weeks.ago))
      create(:post_disapproval, user: CurrentUser.user, post: disapproved, reason: "disinterest")

      assert_tag_match([pending, flagged], "status:unmoderated")
    end

    should "respect the 'Deleted post filter' option when using the status:banned metatag" do
      deleted = create(:post, is_deleted: true, is_banned: true)
      undeleted = create(:post, is_banned: true)

      CurrentUser.hide_deleted_posts = true
      assert_tag_match([undeleted], "status:banned")

      CurrentUser.hide_deleted_posts = false
      assert_tag_match([undeleted, deleted], "status:banned")
    end

    should "return posts for the filetype:<ext> metatag" do
      png = create(:post, file_ext: "png")
      jpg = create(:post, file_ext: "jpg")

      assert_tag_match([png], "filetype:png")
      assert_tag_match([jpg], "-filetype:png")
      assert_tag_match([jpg, png], "filetype:png,jpg")
      assert_tag_match([], "filetype:png filetype:jpg")
      assert_tag_match([], "-filetype:png -filetype:jpg")
      assert_tag_match([], "filetype:garbage")
    end

    should "return posts for the tagcount:<n> metatags" do
      post = create(:post, tag_string: "artist:wokada copyright:vocaloid char:hatsune_miku twintails")

      assert_tag_match([post], "tagcount:4")
      assert_tag_match([post], "arttags:1")
      assert_tag_match([post], "copytags:1")
      assert_tag_match([post], "chartags:1")
      assert_tag_match([post], "gentags:1")
    end

    should "return posts for the md5:<md5> metatag" do
      post1 = create(:post, md5: "abcd")
      post2 = create(:post)

      assert_tag_match([post1], "md5:abcd")
      assert_tag_match([post1], "md5:ABCD")
      assert_tag_match([post1], "md5:123,abcd")
    end

    should "return posts for a source:<text> search" do
      post1 = create(:post, source: "abc def")
      post2 = create(:post, source: "abcdefg")
      post3 = create(:post, source: "")

      assert_tag_match([post1], 'source:"abc def"')
      assert_tag_match([post1], "source:'abc def'")
      assert_tag_match([post2], "source:abcde")
      assert_tag_match([post3, post1], "-source:abcde")

      assert_tag_match([post3], "source:none")
      assert_tag_match([post2, post1], "-source:none")
    end

    should "return posts for a case insensitive source search" do
      post1 = create(:post, source: "ABCD")
      post2 = create(:post, source: "1234")

      assert_tag_match([post1], "source:abcd")
    end

    should "return posts for a pixiv source search" do
      url = "http://i1.pixiv.net/img123/img/artist-name/789.png"
      post = create(:post, source: url)

      assert_tag_match([post], "source:*.pixiv.net/img*/artist-name/*")
      assert_tag_match([],     "source:*.pixiv.net/img*/artist-fake/*")
      assert_tag_match([post], "source:http://*.pixiv.net/img*/img/artist-name/*")
      assert_tag_match([],     "source:http://*.pixiv.net/img*/img/artist-fake/*")
    end

    should "return posts for a pixiv id search (type 1)" do
      url = "http://i1.pixiv.net/img-inf/img/2013/03/14/03/02/36/34228050_s.jpg"
      post = create(:post, source: url)
      assert_tag_match([post], "pixiv_id:34228050")
    end

    should "return posts for a pixiv id search (type 2)" do
      url = "http://i1.pixiv.net/img123/img/artist-name/789.png"
      post = create(:post, source: url)
      assert_tag_match([post], "pixiv_id:789")
    end

    should "return posts for a pixiv id search (type 3)" do
      url = "http://www.pixiv.net/member_illust.php?mode=manga_big&illust_id=19113635&page=0"
      post = create(:post, source: url)
      assert_tag_match([post], "pixiv_id:19113635")
    end

    should "return posts for a pixiv id search (type 4)" do
      url = "http://i2.pixiv.net/img70/img/disappearedstump/34551381_p3.jpg?1364424318"
      post = create(:post, source: url)
      assert_tag_match([post], "pixiv_id:34551381")
    end

    should "return posts for a pixiv_id:any search" do
      url = "http://i1.pixiv.net/img-original/img/2014/10/02/13/51/23/46304396_p0.png"
      post = create(:post, source: url)
      assert_tag_match([post], "pixiv_id:any")
    end

    should "return posts for a pixiv_id:none search" do
      post = create(:post)
      assert_tag_match([post], "pixiv_id:none")
    end

    context "saved searches" do
      setup do
        @post1 = create(:post, tag_string: "aaa")
        @post2 = create(:post, tag_string: "bbb")
        create(:saved_search, query: "aaa", labels: ["zzz"], user: CurrentUser.user)
        create(:saved_search, query: "bbb", user: CurrentUser.user)
      end

      context "labeled" do
        should "work" do
          SavedSearch.expects(:post_ids_for).with(CurrentUser.id, label: "zzz").returns([@post1.id])
          assert_tag_match([@post1], "search:zzz")
        end
      end

      context "missing" do
        should "work" do
          SavedSearch.expects(:post_ids_for).with(CurrentUser.id, label: "uncategorized").returns([@post2.id])
          assert_tag_match([@post2], "search:uncategorized")
        end
      end

      context "all" do
        should "work" do
          SavedSearch.expects(:post_ids_for).with(CurrentUser.id).returns([@post1.id, @post2.id])
          assert_tag_match([@post2, @post1], "search:all")
        end
      end
    end

    should "return posts for a rating:<s|q|e> metatag" do
      s = create(:post, rating: "s")
      q = create(:post, rating: "q")
      e = create(:post, rating: "e")
      all = [e, q, s]

      assert_tag_match([s], "rating:s")
      assert_tag_match([q], "rating:q")
      assert_tag_match([e], "rating:e")

      assert_tag_match(all - [s], "-rating:s")
      assert_tag_match(all - [q], "-rating:q")
      assert_tag_match(all - [e], "-rating:e")
    end

    should "return posts for a locked:<rating|note|status> metatag" do
      rating_locked = create(:post, is_rating_locked: true)
      note_locked   = create(:post, is_note_locked: true)
      status_locked = create(:post, is_status_locked: true)
      all = [status_locked, note_locked, rating_locked]

      assert_tag_match([rating_locked], "locked:rating")
      assert_tag_match([note_locked], "locked:note")
      assert_tag_match([status_locked], "locked:status")

      assert_tag_match(all - [rating_locked], "-locked:rating")
      assert_tag_match(all - [note_locked], "-locked:note")
      assert_tag_match(all - [status_locked], "-locked:status")
    end

    should "return posts for a upvote:<user>, downvote:<user> metatag" do
      CurrentUser.scoped(create(:mod_user)) do
        upvoted   = create(:post, tag_string: "upvote:self")
        downvoted = create(:post, tag_string: "downvote:self")

        assert_tag_match([upvoted],   "upvote:#{CurrentUser.name}")
        assert_tag_match([downvoted], "downvote:#{CurrentUser.name}")
      end
    end

    should "return posts for a disapproved:<type> metatag" do
      CurrentUser.scoped(create(:mod_user)) do
        pending     = create(:post, is_pending: true)
        disapproved = create(:post, is_pending: true)
        disapproval = create(:post_disapproval, user: CurrentUser.user, post: disapproved, reason: "disinterest")

        assert_tag_match([disapproved], "disapproved:#{CurrentUser.name}")
        assert_tag_match([disapproved], "disapproved:disinterest")
        assert_tag_match([],            "disapproved:breaks_rules")

        assert_tag_match([pending],              "-disapproved:#{CurrentUser.name}")
        assert_tag_match([pending],              "-disapproved:disinterest")
        assert_tag_match([disapproved, pending], "-disapproved:breaks_rules")
      end
    end

    should "return posts ordered by a particular attribute" do
      posts = (1..2).map do |n|
        tags = ["tagme", "gentag1 gentag2 artist:arttag char:chartag copy:copytag"]

        p = create(
          :post,
          score: n,
          fav_count: n,
          file_size: 1.megabyte * n,
          # posts[0] is portrait, posts[1] is landscape. posts[1].mpixels > posts[0].mpixels.
          image_height: 100 * n * n,
          image_width: 100 * (3 - n) * n,
          tag_string: tags[n - 1]
        )

        u = create(:user, created_at: 2.weeks.ago)
        create(:artist_commentary, post: p)
        create(:comment, post: p, creator: u, do_not_bump_post: false)
        create(:note, post: p)
        p
      end

      create(:note, post: posts.second)

      assert_tag_match(posts.reverse, "order:id_desc")
      assert_tag_match(posts.reverse, "order:score")
      assert_tag_match(posts.reverse, "order:favcount")
      assert_tag_match(posts.reverse, "order:change")
      assert_tag_match(posts.reverse, "order:comment")
      assert_tag_match(posts.reverse, "order:comment_bumped")
      assert_tag_match(posts.reverse, "order:note")
      assert_tag_match(posts.reverse, "order:artcomm")
      assert_tag_match(posts.reverse, "order:mpixels")
      assert_tag_match(posts.reverse, "order:portrait")
      assert_tag_match(posts.reverse, "order:filesize")
      assert_tag_match(posts.reverse, "order:tagcount")
      assert_tag_match(posts.reverse, "order:gentags")
      assert_tag_match(posts.reverse, "order:arttags")
      assert_tag_match(posts.reverse, "order:chartags")
      assert_tag_match(posts.reverse, "order:copytags")
      assert_tag_match(posts.reverse, "order:rank")
      assert_tag_match(posts.reverse, "order:note_count")
      assert_tag_match(posts.reverse, "order:note_count_desc")
      assert_tag_match(posts.reverse, "order:notes")
      assert_tag_match(posts.reverse, "order:notes_desc")

      assert_tag_match(posts, "order:id_asc")
      assert_tag_match(posts, "order:score_asc")
      assert_tag_match(posts, "order:favcount_asc")
      assert_tag_match(posts, "order:change_asc")
      assert_tag_match(posts, "order:comment_asc")
      assert_tag_match(posts, "order:comment_bumped_asc")
      assert_tag_match(posts, "order:artcomm_asc")
      assert_tag_match(posts, "order:note_asc")
      assert_tag_match(posts, "order:mpixels_asc")
      assert_tag_match(posts, "order:landscape")
      assert_tag_match(posts, "order:filesize_asc")
      assert_tag_match(posts, "order:tagcount_asc")
      assert_tag_match(posts, "order:gentags_asc")
      assert_tag_match(posts, "order:arttags_asc")
      assert_tag_match(posts, "order:chartags_asc")
      assert_tag_match(posts, "order:copytags_asc")
      assert_tag_match(posts, "order:note_count_asc")
      assert_tag_match(posts, "order:notes_asc")
    end

    should "return posts for order:comment_bumped" do
      post1 = create(:post)
      post2 = create(:post)
      post3 = create(:post)
      user = create(:gold_user)

      as(user) do
        comment1 = create(:comment, creator: user, post: post1)
        comment2 = create(:comment, creator: user, post: post2, do_not_bump_post: true)
        comment3 = create(:comment, creator: user, post: post3)
      end

      assert_tag_match([post3, post1, post2], "order:comment_bumped")
      assert_tag_match([post2, post1, post3], "order:comment_bumped_asc")
    end

    should "return posts for a filesize search" do
      post = create(:post, file_size: 1.megabyte)

      assert_tag_match([post], "filesize:1mb")
      assert_tag_match([post], "filesize:1000kb")
      assert_tag_match([post], "filesize:1048576b")
    end

    should "not perform fuzzy matching for an exact filesize search" do
      post = create(:post, file_size: 1.megabyte)

      assert_tag_match([], "filesize:1048000b")
      assert_tag_match([], "filesize:1048000")
    end

    should "resolve aliases to the actual tag" do
      create(:tag_alias, antecedent_name: "kitten", consequent_name: "cat")
      post1 = create(:post, tag_string: "cat")
      post2 = create(:post, tag_string: "dog")

      assert_tag_match([post1], "kitten")
      assert_tag_match([post2], "-kitten")
    end

    should "fail for more than 6 tags" do
      post1 = create(:post, rating: "s")

      assert_raise(::Post::SearchError) do
        Post.tag_match("a b c rating:s width:10 height:10 user:bob")
      end
    end

    should "not count free tags against the user's search limit" do
      post1 = create(:post, tag_string: "aaa bbb rating:s")

      assert_tag_match([post1], "aaa bbb rating:s")
      assert_tag_match([post1], "aaa bbb status:active")
      assert_tag_match([post1], "aaa bbb limit:20")
    end

    should "succeed for exclusive tag searches with no other tag" do
      post1 = create(:post, rating: "s", tag_string: "aaa")
      assert_nothing_raised do
        relation = Post.tag_match("-aaa")
      end
    end

    should "succeed for exclusive tag searches combined with a metatag" do
      post1 = create(:post, rating: "s", tag_string: "aaa")
      assert_nothing_raised do
        relation = Post.tag_match("-aaa id:>0")
      end
    end
  end
end