JRuby support

.travis.yml

@@ -1,10 +1,17 @@
+language: ruby
 rvm:
   - 1.9.2
   - 1.9.3
   - 2.0.0
   - ruby-head
   - rbx-19mode
+  - jruby-19mode
+before_install:
+  - gem update --system
+  - gem --version
 before_script: "sudo apt-get -y install zip unzip"
 branches:
   only:
-      - master
+    - master
+allow_failures:
+  - rvm: ruby-head

lib/zip/extra_field.rb

@@ -58,7 +58,7 @@ module Zip
     end
 
     def to_local_bin
-      self.map { |_, v| v.to_local_bin }.join
+      self.map { |_, v| v.to_local_bin.force_encoding('BINARY') }.join
     end
 
     alias :to_s :to_local_bin

test/ziptest.rb

@@ -873,13 +873,12 @@ class ZipEntrySetTest < Test::Unit::TestCase
   end
 
   def test_each
-    # Tested indirectly via each_with_index
+    # Used each instead each_with_index due the bug in jRuby
     count = 0
-    @zipEntrySet.each_with_index {
-      |entry, index|
+    @zipEntrySet.each do |entry|
       assert(ZIP_ENTRIES.include?(entry))
-      count = count.succ
-    }
+      count += 1
+    end
     assert_equal(ZIP_ENTRIES.size, count)
   end