n: add test and modernize

Closes #36955.

Signed-off-by: Xu Cheng <xucheng@me.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/Library/Formula/n.rb b/Library/Formula/n.rb
index e259ce136..478e88e3b 100644
--- a/Library/Formula/n.rb
+++ b/Library/Formula/n.rb
@@ -1,5 +1,3 @@
-require "formula"
-
 class N < Formula
   homepage "https://github.com/visionmedia/n"
   head "https://github.com/visionmedia/n.git"
@@ -10,4 +8,8 @@ class N < Formula
     bin.mkdir
     system "make", "PREFIX=#{prefix}", "install"
   end
+
+  test do
+    system bin/"n", "ls"
+  end
 end