Don't use presence of fd to check if fd's were inherited

This is breaking on windows with ruby 2.0.0p645. The issue
seems to be that there is something at the fd, but it's not
the file descriptor from the parent.

Instead, we're now testing that both the fd exists and
the file contains the contents that were written

1 files changed, 4 insertions, 2 deletions

diff --git a/spec/mixlib/shellout_spec.rb b/spec/mixlib/shellout_spec.rb
index 337512f..e0a99eb 100644
--- a/spec/mixlib/shellout_spec.rb
+++ b/spec/mixlib/shellout_spec.rb
@@ -1064,16 +1064,18 @@ describe Mixlib::ShellOut do
       context 'with open files for parent process' do
         before do
           @test_file = Tempfile.new('fd_test')
+          @test_file.write("hello")
+          @test_file.flush
         end
 
         after do
           @test_file.close if @test_file
         end
 
-        let(:ruby_code) { "fd = File.for_fd(#{@test_file.to_i}) rescue nil; puts fd.nil?" }
+        let(:ruby_code) { "fd = File.for_fd(#{@test_file.to_i}) rescue nil; if fd; fd.seek(0); puts fd.read(5); end" }
 
         it "should not see file descriptors of the parent" do
-          expect(stdout.chomp).to eql("true")
+          expect(stdout.chomp).not_to eql("hello")
         end
       end