Prevent betting on running/finished matches

app/services/user_service.rb

@@ -19,5 +19,7 @@ class UserService
       raise UserServiceError, 'The given team is not involved in the given match' unless match.teams.include? team
     end
     raise UserServiceError, 'This user already created a bet on this match' if match.bets.map(&:user).include? @user
+    raise UserServiceError, "Betting is not supported while match is #{match.state}" \
+      unless %w[not_ready not_started].include? match.state
   end
 end

spec/services/user_service_spec.rb

@@ -14,7 +14,7 @@ RSpec.describe UserService do
   end
 
   def build_match(involved_team = team, factory = :playoff_match)
-    create(factory, match_scores: [create(:match_score, team: involved_team)])
+    create(factory, state: :not_started, match_scores: [create(:match_score, team: involved_team)])
   end
 
   describe '#bet!' do
@@ -26,6 +26,16 @@ RSpec.describe UserService do
       end
     end
 
+    context 'on a running match' do
+      it 'throws an exception' do
+        match = build_match
+        match.state = :in_progress
+        expect do
+          user_service.bet! match, team
+        end.to raise_error(UserServiceError, 'Betting is not supported while match is in_progress')
+      end
+    end
+
     context 'with an existing team' do
       let(:match) do
         build_match