feat: add spec for custom link policy

Author: aakashnepal77

spec/policies/custom_link_policy.rb

@@ -0,0 +1,35 @@
+require 'rails_helper'
+
+RSpec.describe CustomLinkPolicy do
+  subject { described_class }
+
+  let(:user) { create(:user, casa_org: organization) }
+  let(:casa_org) { create :casa_org }
+  let(:organization) { build(:casa_org) }
+  let(:volunteer) { create :volunteer, :with_single_case, casa_org: organization }
+  let(:supervisor) { create :supervisor, casa_org: organization }
+  let(:casa_admin) { create :casa_admin, casa_org: organization }
+  let(:all_casa_admin) { create :all_casa_admin }
+  let(:custom_link) { create(:custom_link, casa_org: organization) }
+  let(:valid_attributes) { { text: 'Link Text', url: 'http://example.com', active: true, casa_org: organization } }
+  let(:invalid_attributes) { { text: '', url: 'invalid', active: nil } }
+  let(:other_org_admin) { create(:casa_admin) }
+
+  permissions :create?, :edit?, :new?, :show?, :update? do
+    it 'allows same org casa_admins' do
+      expect(subject).to permit(casa_admin, custom_link)
+    end
+
+    it 'does not allow different org casa_admins' do
+      expect(subject).not_to permit(other_org_admin, custom_link)
+    end
+
+    it 'does not permit supervisor' do
+      expect(subject).not_to permit(supervisor, custom_link)
+    end
+
+    it 'does not permit volunteer' do
+      expect(subject).not_to permit(volunteer, custom_link)
+    end
+  end
+end