cleaner: slightly less coupling in tests

Library/Homebrew/test/test_cleaner.rb

@@ -2,31 +2,29 @@ require 'testing_env'
 require 'cleaner'
 require 'formula'
 
-class CleanerTestBall < Formula
-  url "file:///#{TEST_FOLDER}/tarballs/testball-0.1.tbz"
-
-  def install
-    TEST_FOLDER.cd do
-      bin.mkpath
-      lib.mkpath
-      cp 'mach/a.out', bin
-      cp 'mach/fat.dylib', lib
-      cp 'mach/x86_64.dylib', lib
-      cp 'mach/i386.dylib', lib
-    end
-  end
-end
-
 class CleanerTests < Test::Unit::TestCase
+  include FileUtils
+
+  def setup
+    @f = formula("cleaner_test") { url 'foo-1.0' }
+    @f.prefix.mkpath
+  end
+
+  def teardown
+    @f.prefix.rmtree
+  end
+
   def test_clean_file
-    f = CleanerTestBall.new
-    shutup { f.brew { f.install } }
+    @f.bin.mkpath
+    @f.lib.mkpath
+    cp "#{TEST_FOLDER}/mach/a.out", @f.bin
+    cp Dir["#{TEST_FOLDER}/mach/*.dylib"], @f.lib
 
-    Cleaner.new f
+    Cleaner.new @f
 
-    assert_equal 0100555, (f.bin/'a.out').stat.mode
-    assert_equal 0100444, (f.lib/'fat.dylib').stat.mode
-    assert_equal 0100444, (f.lib/'x86_64.dylib').stat.mode
-    assert_equal 0100444, (f.lib/'i386.dylib').stat.mode
+    assert_equal 0100555, (@f.bin/'a.out').stat.mode
+    assert_equal 0100444, (@f.lib/'fat.dylib').stat.mode
+    assert_equal 0100444, (@f.lib/'x86_64.dylib').stat.mode
+    assert_equal 0100444, (@f.lib/'i386.dylib').stat.mode
   end
 end