Supports has_attribute? for mock_model doubles

.travis.yml

@@ -9,9 +9,9 @@ rvm:
   - 1.8.7
 env:
   - RAILS_VERSION=master
-  - RAILS_VERSION=4.0.2
+  - RAILS_VERSION=4.0.4
   - RAILS_VERSION=4-0-stable
-  - RAILS_VERSION=3.2.16
+  - RAILS_VERSION=3.2.17
   - RAILS_VERSION=3-2-stable
   - RAILS_VERSION=3.1.12
   - RAILS_VERSION=3.0.20
@@ -28,9 +28,9 @@ matrix:
     - rvm: 1.9.2
       env: RAILS_VERSION=master
     - rvm: 1.8.7
-      env: RAILS_VERSION=4.0.2
+      env: RAILS_VERSION=4.0.4
     - rvm: 1.9.2
-      env: RAILS_VERSION=4.0.2
+      env: RAILS_VERSION=4.0.4
     - rvm: 1.8.7
       env: RAILS_VERSION=4-0-stable
     - rvm: 1.9.2

Gemfile

@@ -57,7 +57,7 @@ when /master/
 when /stable$/
   gem "rails", :git => "git://github.com/rails/rails.git", :branch => version
 when nil, false, ""
-  gem "rails", "4.0.2"
+  gem "rails", "4.0.4"
 else
   gem "rails", version
 end

lib/rspec/rails/mocks.rb

@@ -149,6 +149,10 @@ def @object.__model_class_has_column?(method_name)
               #{model_class}.respond_to?(:column_names) && #{model_class}.column_names.include?(method_name.to_s)
             end
 
+            def @object.has_attribute?(attr_name)
+              __model_class_has_column?(attr_name)
+            end unless #{stubs.has_key?(:has_attribute?)}
+
             def @object.respond_to?(method_name, include_private=false)
               __model_class_has_column?(method_name) ? true : super
             end unless #{stubs.has_key?(:respond_to?)}

spec/rspec/rails/mocks/mock_model_spec.rb

@@ -194,6 +194,33 @@
     end
   end
 
+  describe "#has_attribute?" do
+    context "with an ActiveRecord model" do
+      before(:each) do
+        MockableModel.stub(:column_names).and_return(["column_a", "column_b"])
+        @model = mock_model(MockableModel)
+      end
+
+      it "has a given attribute if the underlying model has column of the same name" do
+        expect(@model.has_attribute?("column_a")).to be_true
+        expect(@model.has_attribute?("column_b")).to be_true
+        expect(@model.has_attribute?("column_c")).to be_false
+      end
+
+      it "accepts symbols" do
+        expect(@model.has_attribute?(:column_a)).to be_true
+        expect(@model.has_attribute?(:column_b)).to be_true
+        expect(@model.has_attribute?(:column_c)).to be_false
+      end
+
+      it "allows has_attribute? to be explicitly stubbed" do
+        @model = mock_model(MockableModel, :has_attribute? => false)
+        expect(@model.has_attribute?(:column_a)).to be_false
+        expect(@model.has_attribute?(:column_b)).to be_false
+      end
+    end
+  end
+
   describe "#respond_to?" do
     context "with an ActiveRecord model" do
       before(:each) do