1 files changed, 8 insertions, 0 deletions
diff --git a/Library/Formula/csvprintf.rb b/Library/Formula/csvprintf.rb
index b0c7b8fd0..f0cc8bdf5 100644
--- a/Library/Formula/csvprintf.rb
+++ b/Library/Formula/csvprintf.rb
@@ -11,4 +11,12 @@ class Csvprintf < Formula
                           "--prefix=#{prefix}"
     system "make install"
   end
+
+  test do
+    IO.popen("#{bin}/csvprintf -i '%2$s %1$s\n'", "w+") do |pipe|
+      pipe.write "Last,First\nSmith,Fred\n"
+      pipe.close_write
+      assert_equal "Fred Smith\n", pipe.read
+    end
+  end
 end