Two fixes to make tests pass in Rubinius:

1. rbx doesn't handle dup'ed classes correctly.
   We'll get the same behaviour with subclasses

2. Allow the filename to be in any position in the
   backtrace when an exception is raised.

test/tilt_erbtemplate_test.rb

@@ -66,9 +66,9 @@ class MockOutputVariableScope
       fail 'should have raised an exception'
     rescue => boom
       assert_kind_of NameError, boom
-      line = boom.backtrace.first
+      line = boom.backtrace.grep(/^test\.erb:/).first
+      assert line, "Backtrace didn't contain test.erb"
       file, line, meth = line.split(":")
-      assert_equal 'test.erb', file
       assert_equal '13', line
     end
   end
@@ -163,9 +163,9 @@ class Scope
       fail 'should have raised an exception'
     rescue => boom
       assert_kind_of NameError, boom
-      line = boom.backtrace.first
+      line = boom.backtrace.grep(/^test\.erb:/).first
+      assert line, "Backtrace didn't contain test.erb"
       file, line, meth = line.split(":")
-      assert_equal 'test.erb', file
       assert_equal '13', line
     end
   end

test/tilt_erubistemplate_test.rb

@@ -72,9 +72,9 @@ class MockOutputVariableScope
         fail 'should have raised an exception'
       rescue => boom
         assert_kind_of NameError, boom
-        line = boom.backtrace.first
+        line = boom.backtrace.grep(/^test\.erubis:/).first
+        assert line, "Backtrace didn't contain test.erubis"
         file, line, meth = line.split(":")
-        assert_equal 'test.erubis', file
         assert_equal '13', line
       end
     end

test/tilt_fallback_test.rb

@@ -16,8 +16,8 @@ def self.engine_initialized?; true end
     def prepare;                       end
   end
 
-  FailTemplate2 = FailTemplate.dup
-  WinTemplate2  = WinTemplate.dup
+  FailTemplate2 = Class.new(FailTemplate)
+  WinTemplate2  = Class.new(WinTemplate)
 
   def set_ivar(obj, name, value)
     obj.instance_variable_set("@#{name}", value)

test/tilt_hamltemplate_test.rb

@@ -48,9 +48,9 @@ class HamlTemplateTest < Test::Unit::TestCase
         fail 'should have raised an exception'
       rescue => boom
         assert_kind_of NameError, boom
-        line = boom.backtrace.first
+        line = boom.backtrace.grep(/^test\.haml:/).first
+        assert line, "Backtrace didn't contain test.haml"
         file, line, meth = line.split(":")
-        assert_equal 'test.haml', file
         assert_equal '12', line
       end
     end
@@ -108,9 +108,9 @@ class Scope
         fail 'should have raised an exception'
       rescue => boom
         assert_kind_of NameError, boom
-        line = boom.backtrace.first
+        line = boom.backtrace.grep(/^test\.haml:/).first
+        assert line, "Backtrace didn't contain test.haml"
         file, line, meth = line.split(":")
-        assert_equal 'test.haml', file
         assert_equal '12', line
       end
     end

test/tilt_stringtemplate_test.rb

@@ -48,9 +48,9 @@ class StringTemplateTest < Test::Unit::TestCase
       fail 'should have raised an exception'
     rescue => boom
       assert_kind_of NameError, boom
-      line = boom.backtrace.first
+      line = boom.backtrace.grep(/^test\.str:/).first
+      assert line, "Backtrace didn't contain test.str"
       file, line, meth = line.split(":")
-      assert_equal 'test.str', file
       assert_equal '13', line
     end
   end
@@ -135,8 +135,9 @@ class Scope
     rescue => boom
       assert_kind_of NameError, boom
       line = boom.backtrace.first
+      line = boom.backtrace.grep(/^test\.str:/).first
+      assert line, "Backtrace didn't contain test.str"
       file, line, meth = line.split(":")
-      assert_equal 'test.str', file
       assert_equal '13', line
     end
   end