rrdtool: use mktemp and quicklook in test

Otherwise we are writing files to $PWD, which is undesirable.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>

1 files changed, 4 insertions, 3 deletions

diff --git a/Library/Formula/rrdtool.rb b/Library/Formula/rrdtool.rb
index 0ee816373..b6e5e3900 100644
--- a/Library/Formula/rrdtool.rb
+++ b/Library/Formula/rrdtool.rb
@@ -46,9 +46,10 @@ class Rrdtool < Formula
   end
 
   def test
-    system "ruby", prefix+"test.rb"
-    system "open test.png"
-    puts "You may want to `rm test.{rrd,png}`"
+    mktemp do
+      system "ruby", prefix/"test.rb"
+      system "/usr/bin/qlmanage", "-p", "test.png"
+    end
   end
 end