Add DeleteStatusColumnService service

app/services/repository_columns/delete_status_column_service.rb

@@ -7,6 +7,16 @@ module RepositoryColumns
       @column = column
     end
 
-    def call; end
+    def call
+      ActiveRecord::Base.transaction do
+        log_activity(:delete_column_inventory)
+        @column.destroy!
+      rescue ActiveRecord::RecordNotDestroyed
+        errors[:repository_column] = 'record cannot be destroyed'
+        raise ActiveRecord::Rollback
+      end
+
+      self
+    end
   end
 end

spec/services/repositories/delete_status_column_service_spec.rb

@@ -0,0 +1,61 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe RepositoryColumns::DeleteStatusColumnService do
+  let(:user) { create :user }
+  let!(:user_team) { create :user_team, :admin, user: user, team: team }
+  let(:team) { create :team }
+  let(:repository) { create :repository, team: team }
+  let(:repository_column) { create :repository_column, :status_type }
+
+  context 'when deletes status column' do
+    let(:service_call) do
+      RepositoryColumns::DeleteStatusColumnService.call(user: user, team: team, column: repository_column)
+    end
+
+    it 'removes RepositoryColumn record' do
+      repository_column
+
+      expect { service_call }.to change { RepositoryColumn.count }.by(-1)
+    end
+
+    it 'adds Activity record' do
+      expect { service_call }.to(change { Activity.count }.by(1))
+    end
+
+    context 'when RepositoryColumn has RepositoryStatusItems' do
+      before do
+        3.times do
+          create(:repository_status_item, repository: repository, repository_column: repository_column)
+        end
+      end
+
+      it 'removes RepositoryStatusItem records as well' do
+        expect { service_call }.to(change { RepositoryStatusItem.count }.by(-3))
+      end
+    end
+  end
+
+  context 'when column cannot be deleted' do
+    let(:service_call) do
+      RepositoryColumns::DeleteStatusColumnService.call(user: user, team: team, column: repository_column)
+    end
+
+    before do
+      allow_any_instance_of(RepositoryColumn).to receive(:destroy!).and_raise(ActiveRecord::RecordNotDestroyed)
+    end
+
+    it 'returns errors' do
+      expect(service_call.errors).to have_key(:repository_column)
+    end
+
+    it 'returns succeed false' do
+      expect(service_call.succeed?).to be_falsey
+    end
+
+    it 'does not add Activity record' do
+      expect { service_call }.not_to(change { Activity.count })
+    end
+  end
+end