Fix single-record invalid condition on PollVote (#23810)

spec/models/poll_vote_spec.rb

@@ -10,4 +10,53 @@ RSpec.describe PollVote, type: :model do
       expect(poll_vote.object_type).to eq :vote
     end
   end
+
+  describe 'validations' do
+    context 'with a vote on an expired poll' do
+      it 'marks the vote invalid' do
+        poll = Fabricate.build(:poll, expires_at: 30.days.ago)
+
+        vote = Fabricate.build(:poll_vote, poll: poll)
+        expect(vote).to_not be_valid
+      end
+    end
+
+    context 'with invalid choices' do
+      it 'marks vote invalid with negative choice' do
+        poll = Fabricate.build(:poll)
+
+        vote = Fabricate.build(:poll_vote, poll: poll, choice: -100)
+        expect(vote).to_not be_valid
+      end
+
+      it 'marks vote invalid with choice in excess of options' do
+        poll = Fabricate.build(:poll, options: %w(a b c))
+
+        vote = Fabricate.build(:poll_vote, poll: poll, choice: 10)
+        expect(vote).to_not be_valid
+      end
+    end
+
+    context 'with a poll where multiple is true' do
+      it 'does not allow a second vote on same choice from same account' do
+        poll = Fabricate(:poll, multiple: true, options: %w(a b c))
+        first_vote = Fabricate(:poll_vote, poll: poll, choice: 1)
+        expect(first_vote).to be_valid
+
+        second_vote = Fabricate.build(:poll_vote, account: first_vote.account, poll: poll, choice: 1)
+        expect(second_vote).to_not be_valid
+      end
+    end
+
+    context 'with a poll where multiple is false' do
+      it 'does not allow a second vote from same account' do
+        poll = Fabricate(:poll, multiple: false, options: %w(a b c))
+        first_vote = Fabricate(:poll_vote, poll: poll)
+        expect(first_vote).to be_valid
+
+        second_vote = Fabricate.build(:poll_vote, account: first_vote.account, poll: poll)
+        expect(second_vote).to_not be_valid
+      end
+    end
+  end
 end