adds method to get user votes on specific debates

spec/models/user_spec.rb

@@ -1,4 +1,30 @@
 require 'rails_helper'
 
 describe User do
+
+  before(:each) do
+    @user = create(:user)
+  end
+
+  describe "#votes_on_debates" do
+    it "should return {} if no debate" do
+      expect(@user.votes_on_debates()).to eq({})
+      expect(@user.votes_on_debates([])).to eq({})
+      expect(@user.votes_on_debates([nil, nil])).to eq({})
+    end
+
+    it "should return a hash of debates ids and votes" do
+      debate1 = create(:debate)
+      debate2 = create(:debate)
+      debate3 = create(:debate)
+      create(:vote, voter: @user, votable: debate1, vote_flag: true)
+      create(:vote, voter: @user, votable: debate3, vote_flag: false)
+
+      voted = @user.votes_on_debates([debate1.id, debate2.id, debate3.id])
+
+      expect(voted[debate1.id]).to eq(true)
+      expect(voted[debate2.id]).to eq(nil)
+      expect(voted[debate3.id]).to eq(false)
+    end
+  end
 end