creating instructions to use a Rails initializers with yaml configs

README.rdoc

@@ -7,13 +7,13 @@ Poundpay is a payments platform for marketplaces
 
 1. Add the following to your Gemfile
 
-    gem 'poundpay', '~> 0.2.0'
+    gem 'poundpay', '~> 0.2.1'
 
 2. At the command prompt, install the gem with bundler
 
     bundle install
 
-3. Add your configuration to config/poundpay.yml in your Rails project
+3. Create the file config/poundpay.yml and add your configurations
 
     development:
       developer_sid: DV0383d447360511e0bbac00264a09ff3c
@@ -25,7 +25,11 @@ Poundpay is a payments platform for marketplaces
       developer_sid: DV8dd93f0f3c6411e0863f00264a09ff3c
       auth_token: d8c4ea1bafd3fcac8c1062a72c22bcdb09321deb1041df257165cd6449def0de
 
-4. Protect your callback controller
+4. Create the file initializers/poundpay.rb and add the following
+
+    Poundpay.configure_from_yaml "config/poundpay.yml"
+
+5. Protect your callback controller
 
     before_filter :verify_poundpay_callback
 

lib/poundpay.rb

@@ -13,13 +13,9 @@ class << self
     attr_writer :api_version
 
     def configure(developer_sid, auth_token)
-      if not developer_sid
-        raise ArgumentError.new "developer_sid is required"
-      end
-
-      if not auth_token
-        raise ArgumentError.new "auth_token is required"
-      end
+      warn "warning: Poundpay is already configured" if configured?
+      raise ArgumentError.new "developer_sid is required" unless developer_sid
+      raise ArgumentError.new "auth_token is required" unless auth_token
 
       unless developer_sid.start_with? "DV"
         raise ArgumentError.new "developer_sid should start with 'DV'.  Make sure " \

lib/poundpay/rails.rb

@@ -1,6 +1,10 @@
-if defined? Rails and Rails.root.join("config", "poundpay.yml").exist?
+if defined? Rails
   module Poundpay
-    @rails_config = YAML::load_file(Rails.root.join("config", "poundpay.yml"))[Rails.env]
-    Poundpay.configure_from_hash(@rails_config)
+    def self.configure_from_yaml(path)
+      pathname = Pathname.new Rails.root.join(path)
+      raise ArgumentError.new "File does not exist: #{pathname.to_s}" unless pathname.exist?
+      config = YAML::load_file(pathname)[Rails.env]
+      Poundpay.configure_from_hash(config)
+    end
   end
 end

lib/poundpay/version.rb

@@ -1,3 +1,3 @@
 module Poundpay
-  VERSION = "0.2.0"
+  VERSION = "0.2.1"
 end

spec/poundpay/rails_spec.rb

@@ -1,44 +1,47 @@
 require 'poundpay'
 
 describe Poundpay do
+  module Rails
+  end
+
   after (:each) do
     Poundpay.clear_config!
   end
 
   it "should automatically load config if exists" do
+    load File.expand_path("../../../lib/poundpay/rails.rb", __FILE__)
+
     module Rails
-      class << self
-        def root
-          Pathname(File.expand_path("../../fixtures", __FILE__))
-        end
-
-        def env
-          "development"
-        end
+      def self.root
+        Pathname(File.expand_path("../../fixtures", __FILE__))
+      end
+
+      def self.env
+        "development"
       end
     end
-    
+
     Poundpay.configured?.should be_false
-    load File.expand_path("../../../lib/poundpay/rails.rb", __FILE__)
+    Poundpay.configure_from_yaml "config/poundpay.yml"
     Poundpay.configured?.should be_true
     Poundpay::Resource.password.should == "development_auth_token"
   end
 
   it "should not do anything if config does not exist" do
+    load File.expand_path("../../../lib/poundpay/rails.rb", __FILE__)
+
     module Rails
-      class << self
-        def root
-          Pathname(File.expand_path("wrong_directory", __FILE__))
-        end
-
-        def env
-          "development"
-        end
+      def self.root
+        Pathname(File.expand_path("../../fixtures", __FILE__))
+      end
+
+      def self.env
+        "development"
       end
     end
-    
+
     Poundpay.configured?.should be_false
-    load File.expand_path("../../../lib/poundpay/rails.rb", __FILE__)
+    expect { Poundpay.configure_from_yaml "wrong_path" }.to raise_error(ArgumentError, /wrong_path/)
     Poundpay.configured?.should be_false
     Poundpay::Resource.password.should == nil
   end