Stride#configuration will return a non nil object

lib/stride.rb

@@ -18,11 +18,14 @@
 
 module Stride
   class << self
-    attr_accessor :configuration
+    attr_writer :configuration
+
+    def configuration
+      @configuration ||= Configuration.new
+    end
   end
 
   def self.configure
-    self.configuration ||= Configuration.new
     yield(configuration)
   end
 end

spec/stride_spec.rb

@@ -1,6 +1,14 @@
 require 'spec_helper'
 
 RSpec.describe Stride do
+  describe '.configuration' do
+    it 'returns a non nil object' do
+      described_class.configuration = nil
+
+      expect(described_class.configuration).to_not be nil
+    end
+  end
+
   describe '.configure' do
     before do
       described_class.configure do |config|