Add test for matching formula filename/class.

Library/Homebrew/formula_test.rb

@@ -0,0 +1,43 @@
+#!/usr/bin/ruby
+# This software is in the public domain, furnished "as is", without technical
+# support, and with no warranty, express or implied, as to its usefulness for
+# any purpose.
+
+$:.unshift File.dirname(__FILE__)
+require 'test/unit'
+require 'global'
+require 'pathname+yeast'
+require 'formula'
+require 'utils'
+
+require 'ARGV+yeast' # needs to be after test/unit to avoid conflict with OptionsParser
+
+
+# NOTE duplicated in unittest.rb (we need to refactor the tests anyway)
+def nostdout
+  if ARGV.include? '-V'
+    yield
+  end
+  begin
+    require 'stringio'
+    tmpo=$stdout
+    tmpe=$stderr
+    $stdout=StringIO.new
+    yield
+  ensure
+    $stdout=tmpo
+  end
+end
+
+
+class FormulaNames <Test::Unit::TestCase
+  def test_formula_names
+    nostdout do
+      Dir["#{HOMEBREW_PREFIX}/Library/Formula/*.rb"].each do |f|
+        assert_nothing_raised do
+          Formula.factory f
+        end
+      end
+    end
+  end
+end