[Haml] Don't print errors for #escape_once under 1.9.

doc-src/HAML_CHANGELOG.md

@@ -3,6 +3,11 @@
 * Table of contents
 {:toc}
 
+## 2.2.14
+
+* Don't print warnings when escaping attributes containing non-ASCII characters
+  in Ruby 1.9.
+
 ## [2.2.13](http://github.com/nex3/haml/commit/2.2.13)
 
 * Allow users to specify {file:HAML_REFERENCE.md#encoding_option `:encoding => "ascii-8bit"`}

lib/haml/helpers.rb

@@ -483,7 +483,9 @@ END
     # @param text [String] The string to sanitize
     # @return [String] The sanitized string
     def escape_once(text)
-      text.to_s.gsub(/[\"><]|&(?!(?:[a-zA-Z]+|(#\d+));)/n) {|s| HTML_ESCAPE[s]}
+      Haml::Util.silence_warnings do
+        text.to_s.gsub(/[\"><]|&(?!(?:[a-zA-Z]+|(#\d+));)/n) {|s| HTML_ESCAPE[s]}
+      end
     end
 
     # Returns whether or not the current template is a Haml template.

lib/haml/util.rb

@@ -1,6 +1,7 @@
 require 'erb'
 require 'set'
 require 'enumerator'
+require 'stringio'
 
 module Haml
   # A module containing various useful functions.
@@ -122,6 +123,16 @@ module Haml
       end
     end
 
+    # Silence all output to STDERR within a block.
+    #
+    # @yield A block in which no output will be printed to STDERR
+    def silence_warnings
+      the_real_stderr, $stderr = $stderr, StringIO.new
+      yield
+    ensure
+      $stderr = the_real_stderr
+    end
+
     ## Cross Rails Version Compatibility
 
     # Returns the root of the Rails application,

test/haml/engine_test.rb

@@ -1033,6 +1033,11 @@ END
     assert_equal("<a></a>\n", render('%a{:b => "a #{1 + 1} b", :c => "d"}', :suppress_eval => true))
   end
 
+  def test_utf8_attrs
+    assert_equal("<a href='héllo'></a>\n", render("%a{:href => 'héllo'}"))
+    assert_equal("<a href='héllo'></a>\n", render("%a(href='héllo')"))
+  end
+
   # HTML 4.0
 
   def test_html_has_no_self_closing_tags

test/haml/util_test.rb

@@ -59,6 +59,16 @@ class UtilTest < Test::Unit::TestCase
       merge_adjacent_strings(["foo ", "bar ", "baz", :bang, "biz", " bop", 12]))
   end
 
+  def test_silence_warnings
+    old_stderr, $stderr = $stderr, StringIO.new
+    warn "Out"
+    assert_equal("Out\n", $stderr.string)
+    silence_warnings {warn "In"}
+    assert_equal("Out\n", $stderr.string)
+  ensure
+    $stderr = old_stderr
+  end
+
   def test_has
     assert(has?(:instance_method, String, :chomp!))
     assert(has?(:private_instance_method, Haml::Engine, :set_locals))

test/test_helper.rb

@@ -29,10 +29,7 @@ class Test::Unit::TestCase
     $stderr = the_real_stderr
   end
 
-  def silence_warnings
-    the_real_stderr, $stderr = $stderr, StringIO.new
-    yield
-  ensure
-    $stderr = the_real_stderr
+  def silence_warnings(&block)
+    Haml::Util.silence_warnings(&block)
   end
 end