WIP fix for Jruby spec

Gemfile

@@ -51,6 +51,10 @@ group :coverage do
   gem 'simplecov', '~> 0.8'
 end
 
+if defined?(RUBY_PLATFORM) && RUBY_PLATFORM == 'java'
+  gem 'tempfile', require: false
+end
+
 if RUBY_VERSION < '2.0.0' || RUBY_ENGINE == 'java'
   gem 'json', '< 2.0.0' # is a dependency of simplecov
 else

spec/rspec/support/spec/stderr_splitter_spec.rb

@@ -101,7 +101,12 @@
 
   # This is essentially what the `to_stderr_from_any_process` matcher attempts
   # to do in CaptureStreamToTempfile.
-  it 'is able to restore the stream from a cloned StdErrSplitter', :pending => RSpec::Support::Ruby.jruby? do
+  it 'is able to restore the stream from a cloned StdErrSplitter' do
+    if RSpec::Support::Ruby.jruby? && Tempfile.new("foo").is_a?(File) == false
+      require 'tempfile'
+      expect(Tempfile.new("foo")).to be_a(File)
+    end
+
     cloned = $stderr.clone
     expect($stderr.to_io).not_to be_a(File)