WIP fix for Jruby spec

spec/rspec/support/spec/stderr_splitter_spec.rb

@@ -101,19 +101,19 @@
 
   # 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
-    cloned = $stderr.clone
-    expect($stderr.to_io).not_to be_a(File)
+  it 'is able to restore the stream from a cloned StdErrSplitter' do
+    cloned = splitter.clone
+    expect(splitter.to_io).not_to be_a(File)
 
     tempfile = Tempfile.new("foo")
     begin
-      $stderr.reopen(tempfile)
-      expect($stderr.to_io).to be_a(File)
+      splitter.reopen(tempfile)
+      expect(splitter.to_io.path).to eq(tempfile.path)
     ensure
-      $stderr.reopen(cloned)
+      splitter.reopen(cloned)
       tempfile.close
       tempfile.unlink
     end
-    expect($stderr.to_io).not_to be_a(File)
+    expect(splitter.to_io.path).not_to eq tempfile.path
   end
 end