diff --git a/lib/gollum/frontend/views/history.rb b/lib/gollum/frontend/views/history.rb
index 02d82768..65a8c8b2 100644
--- a/lib/gollum/frontend/views/history.rb
+++ b/lib/gollum/frontend/views/history.rb
@@ -33,9 +33,9 @@ module Precious
         (r & 2147483648) == 0 ? r : r - 4294967296
       end
 
-      def _identicon_code(blob)
+      def string_to_code string
         # sha bytes
-        b = [Digest::SHA1.hexdigest(blob + @request.host)[0,20]].pack('H*').bytes.to_a
+        b = [Digest::SHA1.hexdigest(string)[0,20]].pack('H*').bytes.to_a
         # Thanks donpark's IdenticonUtil.java for this.
         # Match the following Java code
         # ((b[0] & 0xFF) << 24) | ((b[1] & 0xFF) << 16) |
@@ -47,6 +47,10 @@ module Precious
                b[3] & 0xFF
       end
 
+      def _identicon_code(blob)
+        string_to_code blob + @request.host
+      end
+
       def use_identicon
           @page.wiki.user_icons == 'identicon'
       end
diff --git a/test/test_history_view.rb b/test/test_history_view.rb
new file mode 100644
index 00000000..94ad87e7
--- /dev/null
+++ b/test/test_history_view.rb
@@ -0,0 +1,25 @@
+# ~*~ encoding: utf-8 ~*~
+require File.expand_path(File.join(File.dirname(__FILE__), 'helper'))
+require File.expand_path '../../lib/gollum/frontend/views/history', __FILE__
+
+context "Precious::Views::History" do
+  setup do
+    @history = Precious::Views::History.new
+  end
+
+  test "string_to_code" do
+    # Result must match the following Java code.
+=begin
+	    public static void main(String[] args) throws Exception {
+		    final String s = "code@example.com";
+		    final byte[] b = MessageDigest.getInstance("SHA1").digest(s.toString().getBytes("UTF-8"));
+		    final int c = ((b[0] & 0xFF) << 24) | ((b[1] & 0xFF) << 16)
+				    | ((b[2] & 0xFF) << 8) | (b[3] & 0xFF);
+		    // 143327882
+		    System.out.println(c);
+	    }
+=end
+    actual = @history.string_to_code 'code@example.com'
+    assert_equal 143327882, actual
+  end
+end