Adds basic RSpec setup and one test

Author: O-I

.rspec

@@ -0,0 +1,3 @@
+--color
+--order random
+--require spec_helper

Rakefile

@@ -1,2 +1,9 @@
-require "bundler/gem_tasks"
+require 'bundler/gem_tasks'
+require 'rspec/core'
+require 'rspec/core/rake_task'
 
+RSpec::Core::RakeTask.new(:spec) do |spec|
+  spec.pattern = FileList['spec/**/*_spec.rb']
+end
+
+task :default => :spec

spec/postmates_spec.rb

@@ -0,0 +1,19 @@
+describe Postmates do
+  describe '.new' do
+    it 'returns a Postmates::Client' do
+      expect(Postmates.new).to be_a Postmates::Client
+    end
+  end
+
+  describe '.configure' do
+    it 'sets the api_key and customer_id' do
+      Postmates.configure do |config|
+        config.api_key = '1234'
+        config.customer_id = 'abcd'
+      end
+
+      expect(Postmates.api_key).to eq '1234'
+      expect(Postmates.customer_id).to eq 'abcd'
+    end
+  end
+end

spec/spec_helper.rb

@@ -0,0 +1,7 @@
+require 'rspec'
+require 'webmock/rspec'
+require 'postmates'
+
+RSpec.configure do |config|
+  config.expect_with(:rspec) { |c| c.syntax = :expect }
+end