1 files changed, 32 insertions, 0 deletions
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 4899c49..e566d0e 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -40,6 +40,38 @@ parent = path.parent
 
 $:.unshift parent.join('lib')
 
+module CaptureSubprocessIO
+  def _synchronize
+    yield
+  end
+
+  def capture_subprocess_io
+    _synchronize do
+      begin
+        require 'tempfile'
+
+        captured_stdout, captured_stderr = Tempfile.new('out'), Tempfile.new('err')
+
+        orig_stdout, orig_stderr = $stdout.dup, $stderr.dup
+        $stdout.reopen captured_stdout
+        $stderr.reopen captured_stderr
+
+        yield
+
+        $stdout.rewind
+        $stderr.rewind
+
+        return captured_stdout.read, captured_stderr.read
+      ensure
+        captured_stdout.unlink
+        captured_stderr.unlink
+        $stdout.reopen orig_stdout
+        $stderr.reopen orig_stderr
+      end
+    end
+  end
+end
+
 require 'diff-lcs'
 
 module Diff::LCS::SpecHelper