Allow disabling Gravatars in gitlab.yml settings

Closes #1237

spec/helpers/application_helper_spec.rb

@@ -0,0 +1,26 @@
+require 'spec_helper'
+
+describe ApplicationHelper do
+  describe "gravatar_icon" do
+    let(:user_email) { 'user@email.com' }
+
+    it "should return a generic avatar path when Gravatar is disabled" do
+      Gitlab.config.stub(:disable_gravatar?).and_return(true)
+      gravatar_icon(user_email).should == 'no_avatar.png'
+    end
+
+    it "should return a generic avatar path when email is blank" do
+      gravatar_icon('').should == 'no_avatar.png'
+    end
+
+    it "should use SSL when appropriate" do
+      stub!(:request).and_return(double(:ssl? => true))
+      gravatar_icon(user_email).should match('https://secure.gravatar.com')
+    end
+
+    it "should accept a custom size" do
+      stub!(:request).and_return(double(:ssl? => false))
+      gravatar_icon(user_email, 64).should match(/\?s=64/)
+    end
+  end
+end