add party share factory and model specs

spec/factories/party_shares.rb

@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+FactoryBot.define do
+  factory :party_share do
+    party
+    association :shareable, factory: :crew
+    association :shared_by, factory: :user
+
+    # Ensure the shared_by user owns the party and is in the crew
+    after(:build) do |party_share|
+      party_share.party.user = party_share.shared_by
+      unless party_share.shareable.crew_memberships.exists?(user: party_share.shared_by, retired: false)
+        create(:crew_membership, crew: party_share.shareable, user: party_share.shared_by)
+      end
+    end
+  end
+end

spec/models/party_share_spec.rb

@@ -0,0 +1,121 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe PartyShare, type: :model do
+  describe 'associations' do
+    it { should belong_to(:party) }
+    it { should belong_to(:shareable) }
+    it { should belong_to(:shared_by).class_name('User') }
+  end
+
+  describe 'validations' do
+    let(:crew) { create(:crew) }
+    let(:user) { create(:user) }
+    let(:party) { create(:party, user: user) }
+
+    before do
+      create(:crew_membership, crew: crew, user: user)
+    end
+
+    it 'validates uniqueness of party scoped to shareable' do
+      create(:party_share, party: party, shareable: crew, shared_by: user)
+
+      duplicate = build(:party_share, party: party, shareable: crew, shared_by: user)
+      expect(duplicate).not_to be_valid
+      expect(duplicate.errors[:party_id]).to include('has already been shared with this group')
+    end
+
+    it 'allows same party to be shared with different crews' do
+      crew2 = create(:crew)
+      create(:crew_membership, crew: crew2, user: user)
+
+      share1 = create(:party_share, party: party, shareable: crew, shared_by: user)
+      share2 = build(:party_share, party: party, shareable: crew2, shared_by: user)
+
+      expect(share2).to be_valid
+    end
+  end
+
+  describe 'owner validation' do
+    let(:crew) { create(:crew) }
+    let(:owner) { create(:user) }
+    let(:other_user) { create(:user) }
+    let(:party) { create(:party, user: owner) }
+
+    before do
+      create(:crew_membership, crew: crew, user: owner)
+      create(:crew_membership, crew: crew, user: other_user)
+    end
+
+    it 'allows owner to share their party' do
+      share = build(:party_share, party: party, shareable: crew, shared_by: owner)
+      expect(share).to be_valid
+    end
+
+    it 'prevents non-owner from sharing the party' do
+      share = build(:party_share, party: party, shareable: crew, shared_by: other_user)
+      expect(share).not_to be_valid
+      expect(share.errors[:shared_by]).to include('must be the party owner')
+    end
+  end
+
+  describe 'crew membership validation' do
+    let(:crew) { create(:crew) }
+    let(:user) { create(:user) }
+    let(:party) { create(:party, user: user) }
+
+    it 'allows sharing to a crew the user belongs to' do
+      create(:crew_membership, crew: crew, user: user)
+      share = build(:party_share, party: party, shareable: crew, shared_by: user)
+      expect(share).to be_valid
+    end
+
+    it 'prevents sharing to a crew the user does not belong to' do
+      share = build(:party_share, party: party, shareable: crew, shared_by: user)
+      expect(share).not_to be_valid
+      expect(share.errors[:shareable]).to include('you must be a member of this crew')
+    end
+
+    it 'prevents sharing if user has retired from crew' do
+      membership = create(:crew_membership, crew: crew, user: user)
+      membership.retire!
+
+      share = build(:party_share, party: party, shareable: crew, shared_by: user)
+      expect(share).not_to be_valid
+    end
+  end
+
+  describe 'scopes' do
+    let(:crew1) { create(:crew) }
+    let(:crew2) { create(:crew) }
+    let(:user) { create(:user) }
+    let(:party1) { create(:party, user: user) }
+    let(:party2) { create(:party, user: user) }
+
+    before do
+      create(:crew_membership, crew: crew1, user: user)
+      create(:crew_membership, crew: crew2, user: user)
+    end
+
+    describe '.for_crew' do
+      it 'returns shares for a specific crew' do
+        share1 = create(:party_share, party: party1, shareable: crew1, shared_by: user)
+        share2 = create(:party_share, party: party2, shareable: crew2, shared_by: user)
+
+        expect(PartyShare.for_crew(crew1)).to include(share1)
+        expect(PartyShare.for_crew(crew1)).not_to include(share2)
+      end
+    end
+
+    describe '.for_party' do
+      it 'returns shares for a specific party' do
+        share1 = create(:party_share, party: party1, shareable: crew1, shared_by: user)
+        share2 = create(:party_share, party: party2, shareable: crew1, shared_by: user)
+
+        expect(PartyShare.for_party(party1)).to include(share1)
+        expect(PartyShare.for_party(party1)).not_to include(share2)
+      end
+    end
+  end
+end