discourse/spec/integration/spam_rules_spec.rb

# encoding: UTF-8
# frozen_string_literal: true

RSpec.describe "spam rules for users" do
  describe "auto-silence users based on flagging" do
    fab!(:admin) # needed to send a system message
    fab!(:moderator)
    fab!(:user1) { Fabricate(:user) }
    fab!(:user2) { Fabricate(:user) }

    before do
      SiteSetting.hide_post_sensitivity = Reviewable.sensitivities[:disabled]
      Reviewable.set_priorities(high: 4.0)
      SiteSetting.silence_new_user_sensitivity = Reviewable.sensitivities[:low]
      SiteSetting.num_users_to_silence_new_user = 2
    end

    context "when spammer is a new user" do
      fab!(:spammer) { Fabricate(:user, trust_level: TrustLevel[0]) }

      context "when spammer post is not flagged enough times" do
        let!(:spam_post) { create_post(user: spammer) }
        let!(:spam_post2) { create_post(user: spammer) }

        before { PostActionCreator.create(user1, spam_post, :spam) }

        it "should not hide the post" do
          expect(spam_post.reload).to_not be_hidden
        end

        context "when spam posts are flagged enough times, but not by enough users" do
          it "should not hide the post" do
            PostActionCreator.create(user1, spam_post2, :spam)

            expect(spam_post.reload).to_not be_hidden
            expect(spam_post2.reload).to_not be_hidden
            expect(spammer.reload).to_not be_silenced
          end
        end

        context "when one spam post is flagged enough times by enough users" do
          fab!(:another_topic) { Fabricate(:topic) }
          let!(:private_messages_count) { spammer.private_topics_count }
          let!(:mod_pm_count) { moderator.private_topics_count }
          let!(:reviewable) { PostActionCreator.spam(user2, spam_post).reviewable }

          it "should hide the posts" do
            expect(Guardian.new(spammer).can_create_topic?(nil)).to be(false)
            expect {
              PostCreator.create(
                spammer,
                title: "limited time offer for you",
                raw: "better buy this stuff ok",
                archetype_id: 1,
              )
            }.to raise_error(Discourse::InvalidAccess)
            expect(
              PostCreator.create(
                spammer,
                topic_id: another_topic.id,
                raw: "my reply is spam in your topic",
                archetype_id: 1,
              ),
            ).to eq(nil)
            expect(spammer.reload).to be_silenced
            expect(spam_post.reload).to be_hidden
            expect(spam_post2.reload).to be_hidden
            expect(spammer.reload.private_topics_count).to eq(private_messages_count + 1)
          end

          context "when a post is deleted" do
            it "should silence the spammer" do
              spam_post.trash!(moderator)
              spammer.reload
              expect(spammer.reload).to be_silenced
            end
          end

          context "when spammer becomes trust level 1" do
            it "should silence the spammer" do
              spammer.change_trust_level!(TrustLevel[1])
              spammer.reload
              expect(spammer.reload).to be_silenced
            end
          end
        end

        context "with hide_post_sensitivity" do
          it "should silence the spammer" do
            Reviewable.set_priorities(high: 2.0)
            SiteSetting.hide_post_sensitivity = Reviewable.sensitivities[:low]
            PostActionCreator.create(user2, spam_post, :spam)
            expect(spammer.reload).to be_silenced
            expect(Guardian.new(spammer).can_create_topic?(nil)).to be false
          end
        end
      end
    end

    context "when spammer has trust level basic" do
      let(:spammer) { Fabricate(:user, trust_level: TrustLevel[1]) }

      context "when one spam post is flagged enough times by enough users" do
        let!(:spam_post) { Fabricate(:post, user: spammer) }
        let!(:private_messages_count) { spammer.private_topics_count }

        it "should not allow spammer to create new posts" do
          PostActionCreator.create(user1, spam_post, :spam)
          PostActionCreator.create(user2, spam_post, :spam)

          expect(spam_post.reload).to_not be_hidden
          expect(Guardian.new(spammer).can_create_topic?(nil)).to be(true)
          expect {
            PostCreator.create(
              spammer,
              title: "limited time offer for you",
              raw: "better buy this stuff ok",
              archetype_id: 1,
            )
          }.to_not raise_error
          expect(spammer.reload.private_topics_count).to eq(private_messages_count)
        end
      end
    end

    [[:user, trust_level: TrustLevel[2]], [:admin], [:moderator]].each do |spammer_args|
      context "if spammer is trusted #{spammer_args[0]}" do
        let!(:spammer) { Fabricate(*spammer_args) }
        let!(:spam_post) { Fabricate(:post, user: spammer) }
        let!(:private_messages_count) { spammer.private_topics_count }

        it "should not hide the post" do
          PostActionCreator.create(user1, spam_post, :spam)
          PostActionCreator.create(user2, spam_post, :spam)

          expect(spam_post.reload).to_not be_hidden
        end
      end
    end
  end
end