Check for undefined constants/methods on Factory on FactoryGirl to pr…

…eserve backwards compatibility

lib/factory_girl.rb

@@ -14,6 +14,7 @@
 require 'factory_girl/definition_proxy'
 require 'factory_girl/syntax/default'
 require 'factory_girl/find_definitions'
+require 'factory_girl/deprecated'
 
 module FactoryGirl
   VERSION = "1.3.1"

lib/factory_girl/deprecated.rb

@@ -0,0 +1,18 @@
+module Factory
+  def self.method_missing(name, *args, &block)
+    if FactoryGirl.respond_to?(name)
+      $stderr.puts "DEPRECATION WARNING: Change Factory.#{name} to FactoryGirl.#{name}"
+      FactoryGirl.send(name, *args, &block)
+    else
+      super(name, *args, &block)
+    end
+  end
+
+  def self.const_missing(name)
+    if FactoryGirl.const_defined?(name)
+      FactoryGirl.const_get(name)
+    else
+      super(name)
+    end
+  end
+end

spec/factory_girl/deprecated_spec.rb

@@ -0,0 +1,66 @@
+require 'spec_helper'
+
+describe "accessing an undefined method on Factory that is defined on FactoryGirl" do
+  let(:method_name) { :aliases }
+  let(:return_value) { 'value' }
+  let(:args) { [1, 2, 3] }
+
+  before do
+    stub($stderr).puts
+    stub(FactoryGirl, method_name).returns { return_value }
+
+    @result = Factory.send(method_name, *args)
+  end
+
+  it "prints a deprecation warning" do
+    $stderr.should have_received.puts(anything)
+  end
+
+  it "invokes that method on FactoryGirl" do
+    FactoryGirl.should have_received.method_missing(method_name, *args)
+  end
+
+  it "returns the value from the method on FactoryGirl" do
+    @result.should == return_value
+  end
+end
+
+describe "accessing an undefined method on Factory that is not defined on FactoryGirl" do
+  let(:method_name) { :magic_beans }
+
+  before do
+    stub($stderr).puts { raise "Don't print a deprecation warning" }
+
+    begin
+      Factory.send(method_name)
+    rescue Exception => @raised
+    end
+  end
+
+  it "raises a NoMethodError" do
+    @raised.should be_a(NoMethodError)
+  end
+end
+
+describe "accessing an undefined constant on Factory that is defined on FactoryGirl" do
+  before do
+    @result = Factory::VERSION
+  end
+
+  it "returns that constant on FactoryGirl" do
+    @result.should == FactoryGirl::VERSION
+  end
+end
+
+describe "accessing an undefined constant on Factory that is undefined on FactoryGirl" do
+  it "raises a NameError for Factory" do
+    begin
+      Factory::BOGUS
+    rescue Exception => exception
+    end
+
+    exception.should be_a(NameError)
+    exception.message.should include("Factory::BOGUS")
+  end
+end
+