tests: remove special-casing @path in TestBall

Tests that expect Formula#path to resolve to a real path should use
TestBallWithRealPath; TestBall gets its original behavior back, fixing a
failing test in test_formula_install.

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

Library/Homebrew/test/test_bucket.rb

@@ -86,7 +86,7 @@ class BeerTasting < Test::Unit::TestCase
 
     nostdout do
       assert_nothing_raised do
-        f=TestBall.new
+        f=TestBallWithRealPath.new
         Homebrew.info_formula f
         Cleaner.new f
         Homebrew.prune

Library/Homebrew/test/testball.rb

@@ -6,7 +6,6 @@ class TestBall <Formula
     @url="file:///#{TEST_FOLDER}/tarballs/testball-0.1.tbz"
     @homepage = 'http://example.com/'
     super "testball"
-    @path = Pathname.new(__FILE__)
   end
   def install
     prefix.install "bin"
@@ -14,6 +13,13 @@ class TestBall <Formula
   end
 end
 
+class TestBallWithRealPath < TestBall
+  def initialize name=nil
+    super "testballwithrealpath"
+    @path = Pathname.new(__FILE__)
+  end
+end
+
 class TestBallWithMirror < Formula
   # `url` is bogus---curl should fail to download it. The mirror is fine
   # though.