Fix usericons (#1408)

* Fix and refactor user icons, add Basic tests
* Remove identicon_canvas, use identicon.js
* Use octicon by default

test/test_latest_changes_view.rb

@@ -12,12 +12,13 @@ context "Precious::Views::LatestChanges" do
   setup do
     @path = cloned_testpath("examples/lotr.git")
     @wiki = Gollum::Wiki.new(@path)
+    @url = '/gollum/latest_changes'
     Precious::App.set(:gollum_path, @path)
     Precious::App.set(:wiki_options, {:pagination_count => 10})
   end
 
   test "displays_latest_changes" do
-    get('/gollum/latest_changes')
+    get(@url)
     body = last_response.body
 
     assert body.include?("Charles Pence</span>"), "/latest_changes should include Author Charles Pence"
@@ -27,6 +28,20 @@ context "Precious::Views::LatestChanges" do
     assert body.include?('<a href="Hobbit.md/874f597a5659b4c3b153674ea04e406ff393975e">Hobbit.md</a>'), "/latest_changes should include links to modified pages in #{body}"
   end
 
+  test 'gravatar' do
+    Precious::App.set(:wiki_options, {:user_icons => 'gravatar'})
+    get @url
+    assert last_response.body.include?('<img src="https://secure.gravatar.com/'), "gravatar icon missing from #{@url}"
+    Precious::App.set(:wiki_options, {:user_icons => 'none'})
+  end
+  
+  test 'identicon' do
+    Precious::App.set(:wiki_options, {:user_icons => 'identicon'})
+    get @url
+    assert last_response.body.include?('class="identicon" data-identicon="'), "identicon icon missing from #{@url}"
+    Precious::App.set(:wiki_options, {:user_icons => 'none'})
+  end
+
   test "extract destination file name in case of path renaming" do
     view = Precious::Views::LatestChanges.new
     assert_equal "newname.md", view.extract_renamed_path_destination("oldname.md => newname.md")
@@ -36,4 +51,4 @@ context "Precious::Views::LatestChanges" do
   teardown do
     FileUtils.rm_rf(@path)
   end
-end
+end