Normalize locale string to expected format (#26)

CHANGELOG.md

@@ -4,6 +4,10 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
 
+## [1.3.1]
+## Add
+- Normalize locale to expected format
+
 ## [1.3.0]
 ## Add
 - Code-style now adheres to standard gem 

lib/carriage/builder.rb

@@ -19,8 +19,8 @@ def call(items, tag: nil, key_id: nil, locale: :us)
 
         params[:AssociateTag] = tag unless tag.nil? || tag.empty?
         params[:AWSAccessKeyId] = key_id unless key_id.nil? || key_id.empty?
-
-        Carriage.call(locale, params)
+        
+        Carriage.call(locale.downcase.to_sym, params)
       end
 
       private

lib/carriage/version.rb

@@ -1,3 +1,3 @@
 module Carriage
-  VERSION = "1.3.0"
+  VERSION = "1.3.1"
 end

test/carriage_test.rb

@@ -67,6 +67,14 @@ def test_available_locales
     assert Carriage.build(items, tag: TAG, locale: :in).start_with?("https://www.amazon.in")
   end
 
+  def test_normalize_locales
+    items = [{asin: "B00WR23X5I", quantity: 1}]
+
+    assert Carriage.build(items, tag: TAG, locale: 'UK').start_with?("https://www.amazon.co.uk")
+    assert Carriage.build(items, tag: TAG, locale: :IN).start_with?("https://www.amazon.in")
+
+  end
+
   def test_verify_locale
     assert_raises(Carriage::Locale::NotFound) do
       Carriage.call(:oo, {"ASIN.1": "B00WR23X5I", "Quantity.1": 1})