Test match index controller with filter

spec/controllers/matches_controller_spec.rb

@@ -2,6 +2,14 @@
 
 require 'rails_helper'
 
+def test_get_index_with_filter(filter_state)
+  get :index, params: {state: filter_state, tournament_id: @tournament.to_param}
+  body = deserialize_response response
+  body.each do |match|
+    expect(match[:state]).to eq(filter_state)
+  end
+end
+
 RSpec.describe MatchesController, type: :controller do
   before do
     @match = create(:match, state: :not_started)
@@ -12,6 +20,33 @@ RSpec.describe MatchesController, type: :controller do
     @match.match_scores = create_pair(:match_score)
   end
 
+  describe 'GET #index' do
+    context 'on a running group stage' do
+      before do
+        @tournament = create(:group_stage_tournament, match_factory: :running_group_match)
+        @tournament.matches.each_with_index do |m, i|
+          m.state = :not_started if i.even?
+          m.save!
+        end
+      end
+
+      it 'filters running matches when told to do so' do
+        test_get_index_with_filter('running')
+      end
+
+      it 'filters not_started matches when told to do so' do
+        test_get_index_with_filter('not_started')
+      end
+
+      it 'doesn\'t break if the filter contains rubbish' do
+        filter_state = 'saftladen'
+        get :index, params: { state: filter_state, tournament_id: @tournament.to_param }
+        body = deserialize_response response
+        expect(body.empty?).to be true
+      end
+    end
+  end
+
   describe 'GET #show' do
     it 'should return success' do
       get :show, params: { id: @match.to_param }