Add spec for PeopleHelper#birthday_format

closes #6738

Changelog.md

@@ -8,6 +8,7 @@
 * Fix internal server error when trying to log out of an expired session [#6707](https://github.com/diaspora/diaspora/pull/6707)
 * Only mark unread notifications as read [#6711](https://github.com/diaspora/diaspora/pull/6711)
 * Use https for OEmbeds [#6748](https://github.com/diaspora/diaspora/pull/6748)
+* Fix birthday issues on leap days [#6738](https://github.com/diaspora/diaspora/pull/6738)
 
 ## Features
 * Added the footer to conversation pages [#6710](https://github.com/diaspora/diaspora/pull/6710)

spec/helpers/people_helper_spec.rb

@@ -10,6 +10,18 @@ describe PeopleHelper, :type => :helper do
     @person = FactoryGirl.create(:person)
   end
 
+  describe "#birthday_format" do
+    it "contains the birth year if available" do
+      birthday = Date.new 2016, 3, 5
+      expect(birthday_format(birthday)).to include "2016"
+    end
+
+    it "does not contain the birth year if placeholder year is used" do
+      birthday = Date.new 1004, 3, 5
+      expect(birthday_format(birthday)).not_to include "1004"
+    end
+  end
+
   describe "#person_image_link" do
     it "returns an empty string if person is nil" do
       expect(person_image_link(nil)).to eq("")