redirect to frendly url for debates and proposals if needed

spec/controllers/proposals_controller_spec.rb

@@ -0,0 +1,24 @@
+require 'rails_helper'
+
+describe ProposalsController do
+
+  describe "GET show" do
+
+    let(:proposal) { create :proposal }
+
+    context "when path matches" do
+      it "should not redirect to real path" do
+        get :show, id: proposal.id
+        expect(response).to_not redirect_to proposals_path(proposal)
+      end
+    end
+
+    context "when path does not match" do
+      it "should redirect to real path" do
+        expect(request).to receive(:path).exactly(3).times.and_return "/#{proposal.id}-something-else"
+        get :show, id: proposal.id
+        expect(response).to redirect_to proposal_path(proposal)
+      end
+    end
+  end
+end