Test GroupStageService

spec/services/group_stage_service_spec.rb

@@ -0,0 +1,70 @@
+# frozen_string_literal: true
+
+RSpec.describe GroupStageService do
+  before do
+    @stage = create(:stage)
+    @teams1 = create_list(:team, 4)
+    @teams2 = create_list(:team, 4)
+    @groups = Hash[1 => @teams1, 2 => @teams2].values
+  end
+  describe 'generate_group_stage method' do
+    it 'returns a stage object' do
+      group_stage = GroupStageService.generate_group_stage(@groups)
+      expect(group_stage).to be_a(Stage)
+    end
+
+    it 'returns a stage object with level -1' do
+      group_stage_level = GroupStageService.generate_group_stage(@groups).level
+      expect(group_stage_level).to be(-1)
+    end
+
+    it 'adds the provided groups to the stage' do
+      group_stage_teams = GroupStageService.generate_group_stage(@groups).teams
+      expect(group_stage_teams).to match_array(@groups.flatten)
+    end
+
+    it 'returns false when given different sizes of groups' do
+      unequal_groups = @groups
+      unequal_groups.first.pop
+      group_stage = GroupStageService.generate_group_stage(@groups)
+      expect(group_stage).to eq(false)
+    end
+  end
+
+  describe 'get_group_object_from' do
+    it 'returns a group' do
+      group = GroupStageService.get_group_object_from(@teams1)
+      expect(group).to be_a(Group)
+    end
+  end
+
+  describe 'generate_all_matches_between' do
+    it 'generates a list of not started matches' do
+      matches = GroupStageService.generate_all_matches_between(@teams2)
+      matches.each do |match|
+        expect(match).to be_a(Match)
+        match_state = match.state
+        expect(match_state).to eq('not_started')
+      end
+    end
+
+    it 'generates the right amount of matches' do
+      matches = GroupStageService.generate_all_matches_between(@teams2)
+      # (1..@teams2.size-1).sum -> 1. Team has to play against n-1 teams; second against n-2 ....
+      expect(matches.size).to be((1..@teams2.size - 1).sum)
+    end
+
+    it 'gives matches exclusive positions' do
+      matches = GroupStageService.generate_all_matches_between(@teams2)
+      match_positions = matches.map(&:position)
+      expect(match_positions).to eq(match_positions.uniq)
+    end
+
+    it 'doesn\'t match a team against itself' do
+      matches = GroupStageService.generate_all_matches_between(@teams1)
+      matches.each do |match|
+        expect(match.teams.first).to_not eq(match.teams.second)
+      end
+    end
+  end
+end