Add method to check if match_score is part of a group match

app/models/match_score.rb

@@ -5,4 +5,8 @@ class MatchScore < ApplicationRecord
   belongs_to :team
 
   delegate :owner, to: :match
+
+  def part_of_group_match?
+    match.group_match?
+  end
 end

spec/models/match_score_spec.rb

@@ -7,4 +7,14 @@ RSpec.describe MatchScore, type: :model do
     it { should belong_to :match }
     it { should belong_to :team }
   end
+
+  describe '#part_of_group_match?' do
+    it 'is part of a group match' do
+      expect(create(:running_group_match).match_scores.first.part_of_group_match?).to be(true)
+    end
+
+    it 'isn\'t part of a group match' do
+      expect(create(:running_playoff_match).match_scores.first.part_of_group_match?).to be(false)
+    end
+  end
 end