. allow mapping to a custom class if the mapped class supports two ar…

…guments

Gemfile

@@ -1,6 +1,6 @@
 source :gemcutter
 
-gem 'rails', '>= 3.2.0'
+gem 'rails', '>= 3.0.0'
 
 group :test do
   gem 'rake'

Gemfile.lock

@@ -96,7 +96,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  rails (>= 3.2.0)
+  rails (>= 3.0.0)
   rake
   rspec (>= 2.0.0)
   rspec-rails (>= 2.0.0)

spec/lib/view_models/helpers/mapping_spec.rb

@@ -18,12 +18,12 @@ class ViewModels::SomeModelClazz < ViewModels::Base; end
       it "should return an empty hash by default" do
         specific_view_model_mapping.should == {}
       end
-      it "should raise an ArgumentError on an non-mapped model" do
-        class SomeViewModelClass; end
+      it "should raise an ArgumentError on model that does not support 2 arguments" do
+        class SomeViewModelClass; def initialize; end; end
         specific_view_model_mapping[String] = SomeViewModelClass
         lambda {
           view_model_for("Some String")
-        }.should raise_error(ArgumentError)
+        }.should raise_error(ArgumentError, /2 for 0/)
       end
     end
     describe "no specific mapping" do