set_version does not reset lookup context version

Fixes #53

lib/versioncake/controller_additions.rb

@@ -75,7 +75,11 @@ def configure_rails_view_versioning(version_context)
     end
 
     def set_version(version)
+      service = VersionCake::VersionContextService.new(VersionCake.config)
+      request.env['versioncake.context'] = service.create_context_from_context(version_context, version)
       @request_version = version
+
+      check_version!
     end
   end
 end

lib/versioncake/version_context.rb

@@ -1,6 +1,7 @@
 module VersionCake
   class VersionContext
-    attr_reader :version, :resource, :result
+    attr_reader :resource, :result
+    attr_accessor :version
 
     def initialize(version, resource, result)
       @version, @resource, @result = version, resource, result

lib/versioncake/version_context_service.rb

@@ -34,6 +34,12 @@ def create_context(uri, version)
       VersionCake::VersionContext.new(version, resource, result)
     end
 
+    def create_context_from_context(context, version)
+      result = check_version(context.resource, version)
+
+      VersionCake::VersionContext.new(version, context.resource, result)
+    end
+
     private
 
     def check_version(resource, version)

spec/integration/controller/renders_controller_spec.rb

@@ -60,11 +60,11 @@
     end
 
     context '#set_version' do
-      let(:request_options) { { 'override_version' => 2 } }
+      let(:request_options) { { 'override_version' => 1 } }
       let(:request_version) { 3 }
 
-      it { expect(controller.request_version).to eq 2 }
-      it { expect(response_body).to eq 'template v2' }
+      it { expect(controller.request_version).to eq 1 }
+      it { expect(response_body).to eq 'template v1' }
     end
   end
 

spec/unit/version_context_service_spec.rb

@@ -114,4 +114,34 @@
       it { expect(context.result).to eq :obsolete }
     end
   end
+
+  describe '#create_context_from_context' do
+    let(:uri) { 'users/21' }
+    let(:existing_version) { 1 }
+    let(:existing_context) { service.create_context(uri, existing_version) }
+    let(:version) { 5 }
+    subject(:context) { service.create_context_from_context(existing_context, version) }
+
+    it { expect(context.version).to eq 5 }
+    it { expect(context.resource).to eq resource_user }
+    it { expect(context.result).to eq :supported }
+
+    context 'for a deprecated version' do
+      let(:uri) { 'posts/21' }
+      let(:version) { 5 }
+
+      it { expect(context.version).to eq 5 }
+      it { expect(context.resource).to eq resource_all }
+      it { expect(context.result).to eq :deprecated }
+    end
+
+    context 'for an obsolete version' do
+      let(:uri) { 'posts/21' }
+      let(:version) { 2 }
+
+      it { expect(context.version).to eq 2 }
+      it { expect(context.resource).to eq resource_all }
+      it { expect(context.result).to eq :obsolete }
+    end
+  end
 end