Added more tests

lib/roar/rails/formats.rb

@@ -68,7 +68,7 @@ def find_namespaced_class(basis, to_find)
       ancestor_mods = build_ancestor_modules(basis)
       namespace = find_class_in_namespaces(ancestor_mods, to_find)
 
-      namespace.nil? ? to_find.constantize : namespace.const_get(to_find)
+      namespace.nil? ? to_find.constantize : get_constant(namespace, to_find)
     end
 
     def build_ancestor_modules(basis)
@@ -88,12 +88,22 @@ def build_ancestor_modules(basis)
 
     def find_class_in_namespaces(modules, class_name)
       modules.reverse.detect do |ns|
-        begin
-          ns.const_get(class_name, false)
-        rescue NameError
-          nil
+        get_constant(ns, class_name)
+      end
+    end
+
+    # Used to patch different behavior between
+    # different versions of ruby when looking up a
+    # constant like V1::Singer
+    def get_constant(basis, class_string)
+      begin
+        class_string.split('::').reduce(basis) do |basis, const|
+          basis.const_get(const, false)
         end
+      rescue NameError
+        nil
       end
+
     end
 
     class Path < String

test/formats_test.rb

@@ -11,6 +11,10 @@ module V1
   SingerRepresenter = Class.new
   BassistRepresenter = Class.new
   SingersRepresenter = Class.new
+
+  module Inner
+    SingerRepresenter = Class.new
+  end
 end
 
 module V2
@@ -19,6 +23,15 @@ module V2
   SingersRepresenter = Class.new
 end
 
+module Inner
+  Singer = Class.new
+end
+
+module Outer
+  Singer = Class.new
+  SingerRepresenter = Class.new
+end
+
 Bassist = Class.new
 
 class FormatsTest < MiniTest::Spec
@@ -106,6 +119,18 @@ class FormatsTest < MiniTest::Spec
       it 'finds the right class in another namespace' do
         subject.for(:json, V2::Singer.new, 'v1/singers').must_equal V2::SingerRepresenter
       end
+
+      it 'finds the right class in an inner namespace' do
+        subject.for(:json, Inner::Singer.new, 'v1/singers').must_equal V1::Inner::SingerRepresenter
+      end
+
+      it 'finds the right class from the root namespace' do
+        subject.for(:json, Outer::Singer.new, 'v1/singers').must_equal Outer::SingerRepresenter
+      end
+
+      it 'finds the right class in a deep namespace' do
+        subject.for(:json, Singer.new, 'v1/inner/singers').must_equal V1::Inner::SingerRepresenter
+      end
     end
   end