Further improve spec to focus on the recently exited bisect process

Author: JonRowe

spec/integration/bisect_spec.rb

@@ -43,9 +43,15 @@ def bisect(cli_args, expected_status=nil)
       end
 
       it 'does not leave zombie processes', :unless => RSpec::Support::OS.windows? do
+        original_pids = pids()
         bisect(%W[spec/rspec/core/resources/blocking_pipe_bisect_spec.rb_], 1)
-        expect(%x[ps -ho pid,state]).to_not include("Z")
+        sleep 0.1 while (extra_pids = pids() - original_pids).join.match?(/[RE]/i)
+        expect(extra_pids.join).to_not include "Z"
       end
     end
+
+    def pids
+      %x[ps -ho pid,state].split("\n").map { |line| line.split(/\s+/).compact.join(' ') }
+    end
   end
 end