adds helper to show the right progress bar

app/helpers/proposals_helper.rb

@@ -0,0 +1,11 @@
+module ProposalsHelper
+
+  def progress_bar_percentage(proposal)
+    case proposal.cached_votes_up
+      when 0 then 0
+      when 1..Proposal.votes_needed_for_success then (proposal.cached_votes_up.to_f * 100 / Proposal.votes_needed_for_success).floor
+      else 100
+    end
+  end
+
+end

app/views/proposals/_votes.html.erb

@@ -2,7 +2,7 @@
 <div class="supports">
 
   <div class="progress small-12 radius">
-    <span class="meter" style="width: 10%;"></span>
+    <span class="meter" style="width: <%= progress_bar_percentage(proposal) %>%;"></span>
   </div>
 
   <span class="total-supports">

spec/helpers/proposals_helper_spec.rb

@@ -0,0 +1,23 @@
+require 'rails_helper'
+
+describe ProposalsHelper do
+
+  describe "#progress_bar_percentage" do
+
+    it "should be 0 if no votes" do
+      proposal = create(:proposal)
+      expect(progress_bar_percentage(proposal)).to eq 0
+    end
+
+    it "should be a between 1 and 100 if there are votes but less than needed" do
+      proposal = create(:proposal, cached_votes_up: Proposal.votes_needed_for_success/2)
+      expect(progress_bar_percentage(proposal)).to eq 50
+    end
+
+    it "should be 100 if there are more votes than needed" do
+      proposal = create(:proposal, cached_votes_up: Proposal.votes_needed_for_success*2)
+      expect(progress_bar_percentage(proposal)).to eq 100
+    end
+  end
+
+end