discourse/spec/integration/spam_rules_spec.rb

# encoding: UTF-8

require 'spec_helper'

describe PostAction do

  before do
    SiteSetting.flags_required_to_hide_post = 0 # never
    SiteSetting.num_flags_to_block_new_user = 2
    SiteSetting.num_users_to_block_new_user = 2
  end

  Given!(:admin)     { Fabricate(:admin) } # needed to send a system message
  Given!(:moderator) { Fabricate(:moderator) }
  Given(:user1)      { Fabricate(:user) }
  Given(:user2)      { Fabricate(:user) }

  context 'spammer is a new user' do
    Given(:spammer)  { Fabricate(:user, trust_level: TrustLevel.levels[:newuser]) }

    context 'spammer post is not flagged enough times' do
      Given!(:spam_post)  { Fabricate(:post, user: spammer) }
      Given!(:spam_post2) { Fabricate(:post, user: spammer) }
      When                { PostAction.act(user1, spam_post, PostActionType.types[:spam]) }
      Then                { expect(spam_post.reload).to_not be_hidden }

      context 'spam posts are flagged enough times, but not by enough users' do
        When { PostAction.act(user1, spam_post2, PostActionType.types[:spam]) }
        Then { expect(spam_post.reload).to_not be_hidden }
        And  { expect(spam_post2.reload).to_not be_hidden }
        And  { expect(spammer.reload).to_not be_blocked }
      end

      context 'one spam post is flagged enough times by enough users' do
        Given!(:another_topic)          { Fabricate(:topic) }
        Given!(:private_messages_count) { spammer.private_topics_count }
        Given!(:mod_pm_count)           { moderator.private_topics_count }

        When { PostAction.act(user2, spam_post, PostActionType.types[:spam]) }

        Invariant { expect(Guardian.new(spammer).can_create_topic?(nil)).to be_false }
        Invariant { expect{PostCreator.create(spammer, {title: 'limited time offer for you', raw: 'better buy this stuff ok', archetype_id: 1})}.to raise_error(Discourse::InvalidAccess) }
        Invariant { expect{PostCreator.create(spammer, {topic_id: another_topic.id, raw: 'my reply is spam in your topic', archetype_id: 1})}.to raise_error(Discourse::InvalidAccess) }

        Then { expect(spammer.reload).to be_blocked }
        And  { expect(spam_post.reload).to be_hidden }
        And  { expect(spam_post2.reload).to be_hidden }
        And  { expect(spammer.reload.private_topics_count).to eq(private_messages_count + 1) }


        # The following cases describe when a staff user takes some action, but the user
        # still won't be able to make posts.
        # A staff user needs to clear the blocked flag from the user record.

        context "a post's flags are cleared" do
          When { PostAction.clear_flags!(spam_post, admin); spammer.reload }
          Then { expect(spammer.reload).to be_blocked }
        end

        context "a post is deleted" do
          When { spam_post.trash!; spammer.reload }
          Then { expect(spammer.reload).to be_blocked }
        end

        context "spammer becomes a basic user" do
          When { spammer.change_trust_level!(:basic); spammer.reload }
          Then { expect(spammer.reload).to be_blocked }
        end
      end

      context 'flags_required_to_hide_post takes effect too' do
        Given { SiteSetting.stubs(:flags_required_to_hide_post).returns(2) }
        When  { PostAction.act(user2, spam_post, PostActionType.types[:spam]) }
        Then  { expect(spammer.reload).to be_blocked }
        And   { expect(Guardian.new(spammer).can_create_topic?(nil)).to be_false }
      end
    end
  end

  context "spammer has trust level basic" do
    Given(:spammer)  { Fabricate(:user, trust_level: TrustLevel.levels[:basic]) }

    context 'one spam post is flagged enough times by enough users' do
      Given!(:spam_post)              { Fabricate(:post, user: spammer) }
      Given!(:private_messages_count) { spammer.private_topics_count }
      When { PostAction.act(user1, spam_post, PostActionType.types[:spam]) }
      When { PostAction.act(user2, spam_post, PostActionType.types[:spam]) }
      Then { expect(spam_post.reload).to_not be_hidden }
      And  { expect(Guardian.new(spammer).can_create_topic?(nil)).to be_true }
      And  { expect{PostCreator.create(spammer, {title: 'limited time offer for you', raw: 'better buy this stuff ok', archetype_id: 1})}.to_not raise_error }
      And  { expect(spammer.reload.private_topics_count).to eq(private_messages_count) }
    end
  end

  [[:user, trust_level: TrustLevel.levels[:regular]], [:admin], [:moderator]].each do |spammer_args|
    context "spammer is trusted #{spammer_args[0]}" do
      Given!(:spammer)                { Fabricate(*spammer_args) }
      Given!(:spam_post)              { Fabricate(:post, user: spammer) }
      Given!(:private_messages_count) { spammer.private_topics_count }
      When { PostAction.act(user1, spam_post, PostActionType.types[:spam]) }
      When { PostAction.act(user2, spam_post, PostActionType.types[:spam]) }
      Then { expect(spam_post.reload).to_not be_hidden }
    end
  end
end