Version: make MacOSVersion comparison more robust

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

Library/Homebrew/test/test_versions.rb

@@ -38,6 +38,13 @@ class VersionComparisonTests < Test::Unit::TestCase
     assert v == 10.6
     assert v == :snow_leopard
     assert v < :lion
+    # Test that we can compare against different representations
+    assert v <= 10.8
+    assert v < "10.8"
+    assert v < :mountain_lion
+    assert v < 11
+    assert v < Version.new(10.8)
+    assert Version.new(10.5) < v
   end
 
   def test_version_interrogation

Library/Homebrew/version.rb

@@ -37,7 +37,6 @@ class Version
   include Comparable
 
   def initialize val, detected=false
-    return val if val.is_a? Version or val.nil?
     @version = val.to_s
     @detected_from_url = detected
   end
@@ -210,17 +209,12 @@ end
 # Enable things like "MacOS.version >= :lion"
 class MacOSVersion < Version
   compare do |other|
-    case other
-    when Symbol, Fixnum, Float, Version
     super Version.new case other
       when :mountain_lion then 10.8
       when :lion then 10.7
       when :snow_leopard then 10.6
       when :leopard then 10.5
-      else other
+      else other.to_s
       end
-    else
-      nil
-    end
   end
 end