Add RSpec helper

Adds a helper that configures slimmer to behave correctly in a test environment.

README.md

@@ -149,6 +149,14 @@ within(shared_component_selector('title')) do
 end
 ```
 
+### RSpec
+
+Add the following code to spec/spec_helper:
+
+```rb
+require 'slimmer/rspec'
+```
+
 ## The name
 
 Slimmer was extracted from a much larger project called 'skinner'. 'slimmer' referred to the size

lib/slimmer/rspec.rb

@@ -0,0 +1,11 @@
+require 'rspec/core'
+
+require 'slimmer'
+require 'slimmer/test'
+require 'slimmer/test_helpers/shared_templates'
+
+RSpec.configure do |config|
+  config.include Slimmer::TestHelpers::SharedTemplates
+
+  config.before { stub_shared_component_locales }
+end

lib/slimmer/test_helpers/shared_templates.rb

@@ -1,3 +1,5 @@
+require 'webmock'
+
 module Slimmer
   module TestHelpers
     module SharedTemplates