1 files changed, 27 insertions, 9 deletions
diff --git a/Library/Formula/lemon.rb b/Library/Formula/lemon.rb
index 438569888..22f65af3e 100644
--- a/Library/Formula/lemon.rb
+++ b/Library/Formula/lemon.rb
@@ -1,17 +1,35 @@
-require 'formula'
-
 class Lemon < Formula
-  homepage 'http://www.hwaci.com/sw/lemon/'
-  url 'http://tx97.net/pub/distfiles/lemon-1.69.tar.bz2'
-  sha1 '3f368f5f93c37890a025c3d803b3598a939d615f'
+  homepage "http://www.hwaci.com/sw/lemon/"
+  url "http://tx97.net/pub/distfiles/lemon-1.69.tar.bz2"
+  sha256 "bc7c1cae233b6af48f4b436ee900843106a15bdb1dc810bc463d8c6aad0dd916"
 
   def install
-    (share/'lemon').install 'lempar.c'
+    (share/"lemon").install "lempar.c"
 
     # patch the parser generator to look for the 'lempar.c' template file where we've installed it
-    inreplace 'lemon.c', / = pathsearch\([^)]*\);/, " = \"#{share}/lemon/lempar.c\";"
+    inreplace "lemon.c", / = pathsearch\([^)]*\);/, " = \"#{share}/lemon/lempar.c\";"
+
+    system ENV.cc, "-o", "lemon", "lemon.c"
+    bin.install "lemon"
+  end
+
+  test do
+    (testpath/"gram.y").write <<-EOS.undent
+      %token_type {int}
+      %left PLUS.
+      %include {
+        #include <iostream>
+        #include "example1.h"
+      }
+      %syntax_error {
+        std::cout << "Syntax error!" << std::endl;
+      }
+      program ::= expr(A).   { std::cout << "Result=" << A << std::endl; }
+      expr(A) ::= expr(B) PLUS  expr(C).   { A = B + C; }
+      expr(A) ::= INTEGER(B). { A = B; }
+    EOS
 
-    system ENV.cc, '-o', 'lemon', 'lemon.c'
-    bin.install 'lemon'
+    system "#{bin}/lemon", "gram.y"
+    assert File.exist? "gram.c"
   end
 end