Add shared spec helper with credentials loading function

spec/cim_spec.rb

@@ -2,8 +2,8 @@
 
 describe AuthorizeNet::CIM::Transaction do
 
-  let(:api_key) { CREDENTIALS['api_transaction_key'] }
-  let(:api_login) { CREDENTIALS['api_login_id'] }
+  let(:api_key) { credentials['api_transaction_key'] }
+  let(:api_login) { credentials['api_login_id'] }
   let(:chrs) { [('a'..'z'),('A'..'Z'),('0'..'9')].map(&:to_a).flatten }
   let(:gateway) { :sandbox }
   let(:credit_card) { AuthorizeNet::CreditCard.new('4111111111111111', '01' + (Time.now + (3600 * 24 * 365)).strftime('%y')) }
@@ -442,8 +442,8 @@ def create_address(address, profile)
 end
 
 describe AuthorizeNet::CIM::Response do
-  let(:api_key) { CREDENTIALS['api_transaction_key'] }
-  let(:api_login) { CREDENTIALS['api_login_id'] }
+  let(:api_key) { credentials['api_transaction_key'] }
+  let(:api_login) { credentials['api_login_id'] }
 
   it "should support instantiation" do
     expect(AuthorizeNet::CIM::Response.new('', nil)).to be_instance_of(AuthorizeNet::CIM::Response)

spec/spec_helper.rb

@@ -1,12 +1,8 @@
 require "authorize_net"
 require "yaml"
 
+Dir['./spec/support/**/*.rb'].each{ |f| require f }
+
 RSpec.configure do |config|
-  config.before(:suite) do
-    begin
-      CREDENTIALS = YAML.load_file(File.dirname(__FILE__) + "/credentials.yml")
-    rescue Errno::ENOENT
-      warn "WARNING: Running w/o valid AuthorizeNet sandbox credentials. Create spec/credentials.yml."
-    end
-  end
+  config.include SharedHelper
 end

spec/support/shared_helper.rb

@@ -0,0 +1,7 @@
+module SharedHelper
+  def credentials
+    $credentials ||= YAML.load_file(File.dirname(__FILE__) + "/../credentials.yml")
+  rescue Errno::ENOENT
+    warn "WARNING: Running w/o valid AuthorizeNet sandbox credentials. Create spec/credentials.yml."
+  end
+end