diff --git a/app/models/survey_question.rb b/app/models/survey_question.rb
index e80129ab..e7c3a019 100644
--- a/app/models/survey_question.rb
+++ b/app/models/survey_question.rb
@@ -1,5 +1,6 @@
 class SurveyQuestion < ActiveRecord::Base
   belongs_to :survey
+  has_many :survey_replies
 
   # Order of this list should not be changed without proper action!
   enum kind: [:boolean, :choice, :string, :text, :datetime, :numeric]
@@ -12,7 +13,6 @@ class SurveyQuestion < ActiveRecord::Base
   validates :max_choices, numericality: { greater_than_or_equal_to: 1 }, allow_blank: true
 
   validate :max_choices_greater_than_min
-  has_many :survey_replies
 
   def single_choice?
     choice? && max_choices == 1 && min_choices == 1
diff --git a/spec/controllers/surveys_controller_spec.rb b/spec/controllers/surveys_controller_spec.rb
new file mode 100644
index 00000000..0b08bc75
--- /dev/null
+++ b/spec/controllers/surveys_controller_spec.rb
@@ -0,0 +1,34 @@
+require 'spec_helper'
+
+describe SurveysController do
+  let(:admin) { create(:admin) }
+  let(:user) { create(:user) }
+
+  let!(:conference) { create(:conference, start_date: Date.current - 1.day, end_date: Date.current + 1.day, timezone: Time.current.zone) }
+  let!(:survey_future) { create(:survey, surveyable: conference, start_date: Date.current + 2.days, end_date: Date.current + 3.days) }
+  let!(:survey_past) { create(:survey, surveyable: conference, start_date: Date.current - 1.day, end_date: Date.current - 1.day) }
+  let!(:survey_present) { create(:survey, surveyable: conference, start_date: Date.current - 1.day, end_date: Date.current + 1.day) }
+
+  describe 'GET #index' do
+    context 'guest' do
+      before :each do
+        get :index, conference_id: conference.short_title
+      end
+
+      it '@sureveys variable is nil' do
+        expect(assigns(:surveys)).to eq [survey_present]
+      end
+    end
+
+    context 'signed in user' do
+      before :each do
+        sign_in user
+        get :index, conference_id: conference.short_title
+      end
+
+      it 'assigns @surveys with active surveys' do
+        expect(assigns(:surveys)).to eq [survey_present]
+      end
+    end
+  end
+end
diff --git a/spec/factories/survey_questions.rb b/spec/factories/survey_questions.rb
index 0f7cd271..b3e2240f 100644
--- a/spec/factories/survey_questions.rb
+++ b/spec/factories/survey_questions.rb
@@ -2,6 +2,10 @@ FactoryGirl.define do
   factory :survey_question do
     survey
     title 'What about this question?'
+    kind :boolean
+    min_choices nil
+    max_choices nil
+    possible_answers nil
 
     factory :boolean_non_mandatory do
       title 'Have you attended the conference before? (Non mandatory)'
diff --git a/spec/factories/surveys.rb b/spec/factories/surveys.rb
index f88631d5..b4303b84 100644
--- a/spec/factories/surveys.rb
+++ b/spec/factories/surveys.rb
@@ -1,6 +1,9 @@
 FactoryGirl.define do
   factory :survey do
     title 'This is my survey'
+    start_date Date.current - 1.day
+    end_date Date.current + 1.day
+
     factory :conference_survey do
       association :surveyable, factory: :conference
     end
diff --git a/spec/models/survey_question_spec.rb b/spec/models/survey_question_spec.rb
new file mode 100644
index 00000000..7151a889
--- /dev/null
+++ b/spec/models/survey_question_spec.rb
@@ -0,0 +1,98 @@
+require 'spec_helper'
+
+describe SurveyQuestion do
+  # subject needs to be of kind 'choice', so that optional validations also run
+  # eg. numericality of min_choices and max_choices
+  subject { create(:choice_mandatory_1_reply) }
+
+  let(:single_choice_question) { create(:choice_mandatory_1_reply) }
+  let(:multiple_choice_question) { create(:choice_mandatory_2_replies) }
+  let(:boolean_question) { create(:boolean_question, min_choices: 3)}
+
+  describe 'association' do
+    it { is_expected.to belong_to(:survey) }
+    it { is_expected.to have_many(:survey_replies) }
+  end
+
+  describe 'validation' do
+    it { is_expected.to validate_presence_of(:title) }
+    it { is_expected.to validate_numericality_of(:min_choices).is_greater_than_or_equal_to(1) }
+    it { is_expected.to validate_numericality_of(:max_choices).is_greater_than_or_equal_to(1) }
+
+    it 'field presence, when of type choice?' do
+      survey_question = build(:survey_question, kind: :choice)
+      expect(survey_question).to validate_presence_of(:min_choices)
+      expect(survey_question).to validate_presence_of(:max_choices)
+      expect(survey_question).to validate_presence_of(:possible_answers)
+    end
+
+    it 'max_choices > min_choices' do
+      survey_question = build(:survey_question, kind: :choice, min_choices: 3, max_choices: 2)
+      expect(survey_question.valid?).to eq false
+      expect(survey_question.errors[:max_choices]).to eq ['Max choices should not be less than min choices']
+    end
+  end
+
+  describe '#multiple_choice?' do
+    it 'returns false, when choice with 1 max_choice' do
+      expect(single_choice_question.multiple_choice?).to eq false
+    end
+
+    it 'returns true, when choice with 2 max_choices' do
+      expect(multiple_choice_question.multiple_choice?).to eq true
+    end
+  end
+
+  describe '#single_choice?' do
+    it 'returns true, when choice with 1 max_choice' do
+      expect(single_choice_question.single_choice?).to eq true
+    end
+
+    it 'returns false, when choice with 2 max_choices' do
+      expect(multiple_choice_question.single_choice?).to eq false
+    end
+  end
+
+  describe 'min_choices value' do
+    it 'nil, when boolean question' do
+      boolean_question = create(:boolean_mandatory, min_choices: 3)
+      expect(boolean_question.min_choices).to eq nil
+    end
+
+    it 'not nil, when choice question' do
+      boolean_question = create(:survey_question, kind: :choice, possible_answers: 'Yes, No', min_choices: 3, max_choices: 4)
+      expect(boolean_question.min_choices).to eq 3
+    end
+  end
+
+  describe 'optional field' do
+    it 'min_choices is set when question is choice' do
+      question = create(:choice_mandatory_2_replies, min_choices: 2)
+      expect(question.min_choices).to eq 2
+    end
+
+    it 'max_choices is set when question is choice' do
+      question = create(:choice_mandatory_2_replies, max_choices: 2)
+      expect(question.max_choices).to eq 2
+    end
+
+    it 'possible_answers is set when question is choice' do
+      question = create(:choice_mandatory_2_replies, possible_answers: 'sth, sth else')
+      expect(question.possible_answers).to eq 'sth, sth else'
+    end
+
+    shared_examples 'is nil' do |question_kind, field|
+      scenario "when question is #{question_kind} and field is #{field}" do
+        question = create(:survey_question, kind: question_kind.to_sym, field => 3)
+        expect(question.send(field)).to eq nil
+      end
+    end
+
+    fields = ['min_choices', 'max_choices', 'possible_answers']
+    (SurveyQuestion.kinds.keys - ['choice']).each do |kind|
+      fields.each do |field|
+        it_behaves_like 'is nil', kind, field
+      end
+    end
+  end
+end
diff --git a/spec/models/survey_reply_spec.rb b/spec/models/survey_reply_spec.rb
new file mode 100644
index 00000000..0c340c83
--- /dev/null
+++ b/spec/models/survey_reply_spec.rb
@@ -0,0 +1,14 @@
+require 'spec_helper'
+
+describe SurveyReply do
+  subject { create(:survey_reply) }
+
+  describe 'association' do
+    it { is_expected.to belong_to(:user) }
+    it { is_expected.to belong_to(:survey_question) }
+  end
+
+  describe 'validation' do
+    it { is_expected.to validate_uniqueness_of(:survey_question_id).scoped_to(:user_id) }
+  end
+end
diff --git a/spec/models/survey_spec.rb b/spec/models/survey_spec.rb
new file mode 100644
index 00000000..caed4264
--- /dev/null
+++ b/spec/models/survey_spec.rb
@@ -0,0 +1,28 @@
+require 'spec_helper'
+
+describe Survey do
+  subject { create(:survey) }
+  let(:survey_active) { create(:conference_survey, start_date: Date.current - 1.day, end_date: Date.current + 1.day) }
+  let(:survey_inactive) { create(:conference_survey, start_date: Date.current - 2.day, end_date: Date.current - 1.day) }
+
+  describe 'association' do
+    it { is_expected.to have_many(:survey_questions) }
+    it { is_expected.to have_many(:survey_submissions) }
+  end
+
+  describe 'validation' do
+    it { is_expected.to validate_presence_of(:title) }
+  end
+
+  describe '#active?' do
+    it { expect(survey_active.active?).to eq true }
+    it { expect(survey_inactive.active?).to eq false }
+    it 'returns false, if start_date is not set' do
+      expect(create(:survey, start_date: nil, end_date: Date.current + 1.day).active?).to eq false
+    end
+
+    it 'returns false, if end_date is not set' do
+      expect(create(:survey, start_date: Date.current + 1.day, end_date: nil).active?).to eq false
+    end
+  end
+end
diff --git a/spec/models/survey_submission_spec.rb b/spec/models/survey_submission_spec.rb
new file mode 100644
index 00000000..fdf3ca4f
--- /dev/null
+++ b/spec/models/survey_submission_spec.rb
@@ -0,0 +1,16 @@
+require 'spec_helper'
+
+describe SurveySubmission do
+  subject { create(:survey_submission) }
+
+  describe 'association' do
+    it { is_expected.to belong_to(:survey) }
+    it { is_expected.to belong_to(:user) }
+    it { is_expected.to have_many(:survey_replies).through(:user) }
+    it { is_expected.to accept_nested_attributes_for(:survey_replies) }
+  end
+
+  describe 'validation' do
+    it { is_expected.to validate_uniqueness_of(:user_id).scoped_to(:survey_id) }
+  end
+end