huginn/spec/models/agents/human_task_agent_spec.rb

require 'rails_helper'

describe Agents::HumanTaskAgent do
  before do
    @checker = Agents::HumanTaskAgent.new(:name => "my human task agent")
    @checker.options = @checker.default_options
    @checker.user = users(:bob)
    @checker.save!

    @event = Event.new
    @event.agent = agents(:bob_rain_notifier_agent)
    @event.payload = { 'foo' => { "bar" => { 'baz' => "a2b" } },
                       'name' => "Joe" }
    @event.id = 345

    expect(@checker).to be_valid
  end

  describe "validations" do
    it "validates that trigger_on is 'schedule' or 'event'" do
      @checker.options['trigger_on'] = "foo"
      expect(@checker).not_to be_valid
    end

    it "requires expected_receive_period_in_days when trigger_on is set to 'event'" do
      @checker.options['trigger_on'] = "event"
      @checker.options['expected_receive_period_in_days'] = nil
      expect(@checker).not_to be_valid
      @checker.options['expected_receive_period_in_days'] = 2
      expect(@checker).to be_valid
    end

    it "requires a positive submission_period when trigger_on is set to 'schedule'" do
      @checker.options['trigger_on'] = "schedule"
      @checker.options['submission_period'] = nil
      expect(@checker).not_to be_valid
      @checker.options['submission_period'] = 2
      expect(@checker).to be_valid
    end

    it "requires a hit.title" do
      @checker.options['hit']['title'] = ""
      expect(@checker).not_to be_valid
    end

    it "requires a hit.description" do
      @checker.options['hit']['description'] = ""
      expect(@checker).not_to be_valid
    end

    it "requires hit.assignments" do
      @checker.options['hit']['assignments'] = ""
      expect(@checker).not_to be_valid
      @checker.options['hit']['assignments'] = 0
      expect(@checker).not_to be_valid
      @checker.options['hit']['assignments'] = "moose"
      expect(@checker).not_to be_valid
      @checker.options['hit']['assignments'] = "2"
      expect(@checker).to be_valid
    end

    it "requires hit.questions" do
      old_questions = @checker.options['hit']['questions']
      @checker.options['hit']['questions'] = nil
      expect(@checker).not_to be_valid
      @checker.options['hit']['questions'] = []
      expect(@checker).not_to be_valid
      @checker.options['hit']['questions'] = [old_questions[0]]
      expect(@checker).to be_valid
    end

    it "requires that all questions have key, name, required, type, and question" do
      old_questions = @checker.options['hit']['questions']
      @checker.options['hit']['questions'].first['key'] = ""
      expect(@checker).not_to be_valid

      @checker.options['hit']['questions'] = old_questions
      @checker.options['hit']['questions'].first['name'] = ""
      expect(@checker).not_to be_valid

      @checker.options['hit']['questions'] = old_questions
      @checker.options['hit']['questions'].first['required'] = nil
      expect(@checker).not_to be_valid

      @checker.options['hit']['questions'] = old_questions
      @checker.options['hit']['questions'].first['type'] = ""
      expect(@checker).not_to be_valid

      @checker.options['hit']['questions'] = old_questions
      @checker.options['hit']['questions'].first['question'] = ""
      expect(@checker).not_to be_valid
    end

    it "requires that all questions of type 'selection' have a selections array with keys and text" do
      @checker.options['hit']['questions'][0]['selections'] = []
      expect(@checker).not_to be_valid
      @checker.options['hit']['questions'][0]['selections'] = [{}]
      expect(@checker).not_to be_valid
      @checker.options['hit']['questions'][0]['selections'] = [{ 'key' => "", 'text' => "" }]
      expect(@checker).not_to be_valid
      @checker.options['hit']['questions'][0]['selections'] = [{ 'key' => "", 'text' => "hi" }]
      expect(@checker).not_to be_valid
      @checker.options['hit']['questions'][0]['selections'] = [{ 'key' => "hi", 'text' => "" }]
      expect(@checker).not_to be_valid
      @checker.options['hit']['questions'][0]['selections'] = [{ 'key' => "hi", 'text' => "hi" }]
      expect(@checker).to be_valid
      @checker.options['hit']['questions'][0]['selections'] = [{ 'key' => "hi", 'text' => "hi" }, {}]
      expect(@checker).not_to be_valid
    end

    it "requires that 'poll_options' be present and populated when 'combination_mode' is set to 'poll'" do
      @checker.options['combination_mode'] = "poll"
      expect(@checker).not_to be_valid
      @checker.options['poll_options'] = {}
      expect(@checker).not_to be_valid
      @checker.options['poll_options'] = { 'title' => "Take a poll about jokes",
                                           'instructions' => "Rank these by how funny they are",
                                           'assignments' => 3,
                                           'row_template' => "{{joke}}" }
      expect(@checker).to be_valid
      @checker.options['poll_options'] = { 'instructions' => "Rank these by how funny they are",
                                           'assignments' => 3,
                                           'row_template' => "{{joke}}" }
      expect(@checker).not_to be_valid
      @checker.options['poll_options'] = { 'title' => "Take a poll about jokes",
                                           'assignments' => 3,
                                           'row_template' => "{{joke}}" }
      expect(@checker).not_to be_valid
      @checker.options['poll_options'] = { 'title' => "Take a poll about jokes",
                                           'instructions' => "Rank these by how funny they are",
                                           'row_template' => "{{joke}}" }
      expect(@checker).not_to be_valid
      @checker.options['poll_options'] = { 'title' => "Take a poll about jokes",
                                           'instructions' => "Rank these by how funny they are",
                                           'assignments' => 3}
      expect(@checker).not_to be_valid
    end

    it "requires that all questions be of type 'selection' when 'combination_mode' is 'take_majority'" do
      @checker.options['combination_mode'] = "take_majority"
      expect(@checker).not_to be_valid
      @checker.options['hit']['questions'][1]['type'] = "selection"
      @checker.options['hit']['questions'][1]['selections'] = @checker.options['hit']['questions'][0]['selections']
      expect(@checker).to be_valid
    end

    it "accepts 'take_majority': 'true' for legacy support" do
      @checker.options['take_majority'] = "true"
      expect(@checker).not_to be_valid
      @checker.options['hit']['questions'][1]['type'] = "selection"
      @checker.options['hit']['questions'][1]['selections'] = @checker.options['hit']['questions'][0]['selections']
      expect(@checker).to be_valid
    end
  end

  describe "when 'trigger_on' is set to 'schedule'" do
    before do
      @checker.options['trigger_on'] = "schedule"
      @checker.options['submission_period'] = "2"
      @checker.options.delete('expected_receive_period_in_days')
    end

    it "should check for reviewable HITs frequently" do
      mock(@checker).review_hits.twice
      mock(@checker).create_basic_hit.once
      @checker.check
      @checker.check
    end

    it "should create HITs every 'submission_period' hours" do
      now = Time.now
      stub(Time).now { now }
      mock(@checker).review_hits.times(3)
      mock(@checker).create_basic_hit.twice
      @checker.check
      now += 1 * 60 * 60
      @checker.check
      now += 1 * 60 * 60
      @checker.check
    end

    it "should ignore events" do
      mock(@checker).create_basic_hit(anything).times(0)
      @checker.receive([events(:bob_website_agent_event)])
    end
  end

  describe "when 'trigger_on' is set to 'event'" do
    it "should not create HITs during check but should check for reviewable HITs" do
      @checker.options['submission_period'] = "2"
      now = Time.now
      stub(Time).now { now }
      mock(@checker).review_hits.times(3)
      mock(@checker).create_basic_hit.times(0)
      @checker.check
      now += 1 * 60 * 60
      @checker.check
      now += 1 * 60 * 60
      @checker.check
    end

    it "should create HITs based on events" do
      mock(@checker).create_basic_hit(events(:bob_website_agent_event)).times(1)
      @checker.receive([events(:bob_website_agent_event)])
    end
  end

  describe "creating hits" do
    it "can create HITs based on events, interpolating their values" do
      @checker.options['hit']['title'] = "Hi {{name}}"
      @checker.options['hit']['description'] = "Make something for {{name}}"
      @checker.options['hit']['questions'][0]['name'] = "{{name}} Question 1"

      question_form = nil
      hitInterface = OpenStruct.new
      hitInterface.id = 123
      mock(hitInterface).question_form(instance_of Agents::HumanTaskAgent::AgentQuestionForm) { |agent_question_form_instance| question_form = agent_question_form_instance }
      mock(RTurk::Hit).create(:title => "Hi Joe").yields(hitInterface) { hitInterface }

      @checker.send :create_basic_hit, @event

      expect(hitInterface.max_assignments).to eq(@checker.options['hit']['assignments'])
      expect(hitInterface.reward).to eq(@checker.options['hit']['reward'])
      expect(hitInterface.description).to eq("Make something for Joe")

      xml = question_form.to_xml
      expect(xml).to include("<Title>Hi Joe</Title>")
      expect(xml).to include("<Text>Make something for Joe</Text>")
      expect(xml).to include("<DisplayName>Joe Question 1</DisplayName>")

      expect(@checker.memory['hits'][123]['event_id']).to eq(@event.id)
    end

    it "works without an event too" do
      @checker.options['hit']['title'] = "Hi {{name}}"
      hitInterface = OpenStruct.new
      hitInterface.id = 123
      mock(hitInterface).question_form(instance_of Agents::HumanTaskAgent::AgentQuestionForm)
      mock(RTurk::Hit).create(:title => "Hi").yields(hitInterface) { hitInterface }
      @checker.send :create_basic_hit
      expect(hitInterface.max_assignments).to eq(@checker.options['hit']['assignments'])
      expect(hitInterface.reward).to eq(@checker.options['hit']['reward'])
    end
  end

  describe "reviewing HITs" do
    class FakeHit
      def initialize(options = {})
        @options = options
      end

      def assignments
        @options[:assignments] || []
      end

      def max_assignments
        @options[:max_assignments] || 1
      end

      def dispose!
        @disposed = true
      end

      def disposed?
        @disposed
      end
    end

    class FakeAssignment
      attr_accessor :approved

      def initialize(options = {})
        @options = options
      end

      def answers
        @options[:answers] || {}
      end

      def status
        @options[:status] || ""
      end

      def approve!
        @approved = true
      end
    end

    it "should work on multiple HITs" do
      event2 = Event.new
      event2.agent = agents(:bob_rain_notifier_agent)
      event2.payload = { 'foo2' => { "bar2" => { 'baz2' => "a2b2" } },
                         'name2' => "Joe2" }
      event2.id = 3452

      # It knows about two HITs from two different events.
      @checker.memory['hits'] = {}
      @checker.memory['hits']["JH3132836336DHG"] = { 'event_id' => @event.id }
      @checker.memory['hits']["JH39AA63836DHG"] = { 'event_id' => event2.id }

      hit_ids = %w[JH3132836336DHG JH39AA63836DHG JH39AA63836DH12345]
      mock(RTurk::GetReviewableHITs).create { mock!.hit_ids { hit_ids } } # It sees 3 HITs.

      # It looksup the two HITs that it owns.  Neither are ready yet.
      mock(RTurk::Hit).new("JH3132836336DHG") { FakeHit.new }
      mock(RTurk::Hit).new("JH39AA63836DHG") { FakeHit.new }

      @checker.send :review_hits
    end

    it "shouldn't do anything if an assignment isn't ready" do
      @checker.memory['hits'] = { "JH3132836336DHG" => { 'event_id' => @event.id } }
      mock(RTurk::GetReviewableHITs).create { mock!.hit_ids { %w[JH3132836336DHG JH39AA63836DHG JH39AA63836DH12345] } }
      assignments = [
        FakeAssignment.new(:status => "Accepted", :answers => {}),
        FakeAssignment.new(:status => "Submitted", :answers => {"sentiment"=>"happy", "feedback"=>"Take 2"})
      ]
      hit = FakeHit.new(:max_assignments => 2, :assignments => assignments)
      mock(RTurk::Hit).new("JH3132836336DHG") { hit }

      # One of the assignments isn't set to "Submitted", so this should get skipped for now.
      mock.any_instance_of(FakeAssignment).answers.times(0)

      @checker.send :review_hits

      expect(assignments.all? {|a| a.approved == true }).to be_falsey
      expect(@checker.memory['hits']).to eq({ "JH3132836336DHG" => { 'event_id' => @event.id } })
    end

    it "shouldn't do anything if an assignment is missing" do
      @checker.memory['hits'] = { "JH3132836336DHG" => { 'event_id' => @event.id } }
      mock(RTurk::GetReviewableHITs).create { mock!.hit_ids { %w[JH3132836336DHG JH39AA63836DHG JH39AA63836DH12345] } }
      assignments = [
        FakeAssignment.new(:status => "Submitted", :answers => {"sentiment"=>"happy", "feedback"=>"Take 2"})
      ]
      hit = FakeHit.new(:max_assignments => 2, :assignments => assignments)
      mock(RTurk::Hit).new("JH3132836336DHG") { hit }

      # One of the assignments hasn't shown up yet, so this should get skipped for now.
      mock.any_instance_of(FakeAssignment).answers.times(0)

      @checker.send :review_hits

      expect(assignments.all? {|a| a.approved == true }).to be_falsey
      expect(@checker.memory['hits']).to eq({ "JH3132836336DHG" => { 'event_id' => @event.id } })
    end

    context "emitting events" do
      before do
        @checker.memory['hits'] = { "JH3132836336DHG" => { 'event_id' => @event.id } }
        mock(RTurk::GetReviewableHITs).create { mock!.hit_ids { %w[JH3132836336DHG JH39AA63836DHG JH39AA63836DH12345] } }
        @assignments = [
          FakeAssignment.new(:status => "Submitted", :answers => {"sentiment"=>"neutral", "feedback"=>""}),
          FakeAssignment.new(:status => "Submitted", :answers => {"sentiment"=>"happy", "feedback"=>"Take 2"})
        ]
        @hit = FakeHit.new(:max_assignments => 2, :assignments => @assignments)
        expect(@hit).not_to be_disposed
        mock(RTurk::Hit).new("JH3132836336DHG") { @hit }
      end

      it "should create events when all assignments are ready" do
        expect {
          @checker.send :review_hits
        }.to change { Event.count }.by(1)

        expect(@assignments.all? {|a| a.approved == true }).to be_truthy
        expect(@hit).to be_disposed

        expect(@checker.events.last.payload['answers']).to eq([
          {'sentiment' => "neutral", 'feedback' => ""},
          {'sentiment' => "happy", 'feedback' => "Take 2"}
        ])

        expect(@checker.memory['hits']).to eq({})
      end

      it "should emit separate answers when options[:separate_answers] is true" do
        @checker.options[:separate_answers] = true

        expect {
          @checker.send :review_hits
        }.to change { Event.count }.by(2)

        expect(@assignments.all? {|a| a.approved == true }).to be_truthy
        expect(@hit).to be_disposed

        event1, event2 = @checker.events.last(2)
        expect(event1.payload).not_to have_key('answers')
        expect(event2.payload).not_to have_key('answers')
        expect(event1.payload['answer']).to eq({ 'sentiment' => "happy", 'feedback' => "Take 2" })
        expect(event2.payload['answer']).to eq({ 'sentiment' => "neutral", 'feedback' => "" })

        expect(@checker.memory['hits']).to eq({})
      end
    end

    describe "taking majority votes" do
      before do
        @checker.options['combination_mode'] = "take_majority"
        @checker.memory['hits'] = { "JH3132836336DHG" => { 'event_id' => @event.id } }
        mock(RTurk::GetReviewableHITs).create { mock!.hit_ids { %w[JH3132836336DHG JH39AA63836DHG JH39AA63836DH12345] } }
      end

      it "should take the majority votes of all questions" do
        @checker.options['hit']['questions'][1] = {
          'type' => "selection",
          'key' => "age_range",
          'name' => "Age Range",
          'required' => "true",
          'question' => "Please select your age range:",
          'selections' =>
            [
              { 'key' => "<50", 'text' => "50 years old or younger" },
              { 'key' => ">50", 'text' => "Over 50 years old" }
            ]
        }

        assignments = [
          FakeAssignment.new(:status => "Submitted", :answers => {"sentiment"=>"sad", "age_range"=>"<50"}),
          FakeAssignment.new(:status => "Submitted", :answers => {"sentiment"=>"neutral", "age_range"=>">50"}),
          FakeAssignment.new(:status => "Submitted", :answers => {"sentiment"=>"happy", "age_range"=>">50"}),
          FakeAssignment.new(:status => "Submitted", :answers => {"sentiment"=>"happy", "age_range"=>">50"})
        ]
        hit = FakeHit.new(:max_assignments => 4, :assignments => assignments)
        mock(RTurk::Hit).new("JH3132836336DHG") { hit }

        expect {
          @checker.send :review_hits
        }.to change { Event.count }.by(1)

        expect(assignments.all? {|a| a.approved == true }).to be_truthy

        expect(@checker.events.last.payload['answers']).to eq([
          { 'sentiment' => "sad", 'age_range' => "<50" },
          { 'sentiment' => "neutral", 'age_range' => ">50" },
          { 'sentiment' => "happy", 'age_range' => ">50" },
          { 'sentiment' => "happy", 'age_range' => ">50" }
        ])

        expect(@checker.events.last.payload['counts']).to eq({ 'sentiment' => { 'happy' => 2, 'sad' => 1, 'neutral' => 1 }, 'age_range' => { ">50" => 3, "<50" => 1 } })
        expect(@checker.events.last.payload['majority_answer']).to eq({ 'sentiment' => "happy", 'age_range' => ">50" })
        expect(@checker.events.last.payload).not_to have_key('average_answer')

        expect(@checker.memory['hits']).to eq({})
      end

      it "should also provide an average answer when all questions are numeric" do
        # it should accept 'take_majority': 'true' as well for legacy support.  Demonstrating that here.
        @checker.options.delete :combination_mode
        @checker.options['take_majority'] = "true"

        @checker.options['hit']['questions'] = [
          {
            'type' => "selection",
            'key' => "rating",
            'name' => "Rating",
            'required' => "true",
            'question' => "Please select a rating:",
            'selections' =>
              [
                { 'key' => "1", 'text' => "One" },
                { 'key' => "2", 'text' => "Two" },
                { 'key' => "3", 'text' => "Three" },
                { 'key' => "4", 'text' => "Four" },
                { 'key' => "5.1", 'text' => "Five Point One" }
              ]
          }
        ]

        assignments = [
          FakeAssignment.new(:status => "Submitted", :answers => { "rating"=>"1" }),
          FakeAssignment.new(:status => "Submitted", :answers => { "rating"=>"3" }),
          FakeAssignment.new(:status => "Submitted", :answers => { "rating"=>"5.1" }),
          FakeAssignment.new(:status => "Submitted", :answers => { "rating"=>"2" }),
          FakeAssignment.new(:status => "Submitted", :answers => { "rating"=>"2" })
        ]
        hit = FakeHit.new(:max_assignments => 5, :assignments => assignments)
        mock(RTurk::Hit).new("JH3132836336DHG") { hit }

        expect {
          @checker.send :review_hits
        }.to change { Event.count }.by(1)

        expect(assignments.all? {|a| a.approved == true }).to be_truthy

        expect(@checker.events.last.payload['answers']).to eq([
          { 'rating' => "1" },
          { 'rating' => "3" },
          { 'rating' => "5.1" },
          { 'rating' => "2" },
          { 'rating' => "2" }
        ])

        expect(@checker.events.last.payload['counts']).to eq({ 'rating' => { "1" => 1, "2" => 2, "3" => 1, "4" => 0, "5.1" => 1 } })
        expect(@checker.events.last.payload['majority_answer']).to eq({ 'rating' => "2" })
        expect(@checker.events.last.payload['average_answer']).to eq({ 'rating' => (1 + 2 + 2 + 3 + 5.1) / 5.0 })

        expect(@checker.memory['hits']).to eq({})
      end
    end

    describe "creating and reviewing polls" do
      before do
        @checker.options['combination_mode'] = "poll"
        @checker.options['poll_options'] = {
          'title' => "Hi!",
          'instructions' => "hello!",
          'assignments' => 2,
          'row_template' => "This is {{sentiment}}"
        }
        @event.save!
        mock(RTurk::GetReviewableHITs).create { mock!.hit_ids { %w[JH3132836336DHG JH39AA63836DHG JH39AA63836DH12345] } }
      end

      it "creates a poll using the row_template, message, and correct number of assignments" do
        @checker.memory['hits'] = { "JH3132836336DHG" => { 'event_id' => @event.id } }

        # Mock out the HIT's submitted assignments.
        assignments = [
          FakeAssignment.new(:status => "Submitted", :answers => {"sentiment"=>"sad",     "feedback"=>"This is my feedback 1"}),
          FakeAssignment.new(:status => "Submitted", :answers => {"sentiment"=>"neutral", "feedback"=>"This is my feedback 2"}),
          FakeAssignment.new(:status => "Submitted", :answers => {"sentiment"=>"happy",   "feedback"=>"This is my feedback 3"}),
          FakeAssignment.new(:status => "Submitted", :answers => {"sentiment"=>"happy",   "feedback"=>"This is my feedback 4"})
        ]
        hit = FakeHit.new(:max_assignments => 4, :assignments => assignments)
        mock(RTurk::Hit).new("JH3132836336DHG") { hit }

        expect(@checker.memory['hits']["JH3132836336DHG"]).to be_present

        # Setup mocks for HIT creation

        question_form = nil
        hitInterface = OpenStruct.new
        hitInterface.id = "JH39AA63836DH12345"
        mock(hitInterface).question_form(instance_of Agents::HumanTaskAgent::AgentQuestionForm) { |agent_question_form_instance| question_form = agent_question_form_instance }
        mock(RTurk::Hit).create(:title => "Hi!").yields(hitInterface) { hitInterface }

        # And finally, the test.

        expect {
          @checker.send :review_hits
        }.to change { Event.count }.by(0) # it does not emit an event until all poll results are in

        # it approves the existing assignments

        expect(assignments.all? {|a| a.approved == true }).to be_truthy
        expect(hit).to be_disposed

        # it creates a new HIT for the poll

        expect(hitInterface.max_assignments).to eq(@checker.options['poll_options']['assignments'])
        expect(hitInterface.description).to eq(@checker.options['poll_options']['instructions'])

        xml = question_form.to_xml
        expect(xml).to include("<Text>This is happy</Text>")
        expect(xml).to include("<Text>This is neutral</Text>")
        expect(xml).to include("<Text>This is sad</Text>")

        @checker.save
        @checker.reload
        expect(@checker.memory['hits']["JH3132836336DHG"]).not_to be_present
        expect(@checker.memory['hits']["JH39AA63836DH12345"]).to be_present
        expect(@checker.memory['hits']["JH39AA63836DH12345"]['event_id']).to eq(@event.id)
        expect(@checker.memory['hits']["JH39AA63836DH12345"]['type']).to eq("poll")
        expect(@checker.memory['hits']["JH39AA63836DH12345"]['original_hit']).to eq("JH3132836336DHG")
        expect(@checker.memory['hits']["JH39AA63836DH12345"]['answers'].length).to eq(4)
      end

      it "emits an event when all poll results are in, containing the data from the best answer, plus all others" do
        original_answers = [
          { 'sentiment' => "sad",     'feedback' => "This is my feedback 1"},
          { 'sentiment' => "neutral", 'feedback' => "This is my feedback 2"},
          { 'sentiment' => "happy",   'feedback' => "This is my feedback 3"},
          { 'sentiment' => "happy",   'feedback' => "This is my feedback 4"}
        ]

        @checker.memory['hits'] = {
          'JH39AA63836DH12345' => {
            'type' => 'poll',
            'original_hit' => "JH3132836336DHG",
            'answers' => original_answers,
            'event_id' => 345
          }
        }

        # Mock out the HIT's submitted assignments.
        assignments = [
          FakeAssignment.new(:status => "Submitted", :answers => {"1" => "2", "2" => "5", "3" => "3", "4" => "2"}),
          FakeAssignment.new(:status => "Submitted", :answers => {"1" => "3", "2" => "4", "3" => "1", "4" => "4"})
        ]
        hit = FakeHit.new(:max_assignments => 2, :assignments => assignments)
        mock(RTurk::Hit).new("JH39AA63836DH12345") { hit }

        expect(@checker.memory['hits']["JH39AA63836DH12345"]).to be_present

        expect {
          @checker.send :review_hits
        }.to change { Event.count }.by(1)

        # It emits an event

        expect(@checker.events.last.payload['answers']).to eq(original_answers)
        expect(@checker.events.last.payload['poll']).to eq([{"1" => "2", "2" => "5", "3" => "3", "4" => "2"}, {"1" => "3", "2" => "4", "3" => "1", "4" => "4"}])
        expect(@checker.events.last.payload['best_answer']).to eq({'sentiment' => "neutral", 'feedback' => "This is my feedback 2"})

        # it approves the existing assignments

        expect(assignments.all? {|a| a.approved == true }).to be_truthy
        expect(hit).to be_disposed

        expect(@checker.memory['hits']).to be_empty
      end
    end
  end
end