Add support for exchange_rates API requests

.rubocop_todo.yml

@@ -1,6 +1,6 @@
 # This configuration was generated by
 # `rubocop --auto-gen-config`
-# on 2017-10-26 15:43:11 +0200 using RuboCop version 0.50.0.
+# on 2017-10-30 14:39:50 +0100 using RuboCop version 0.50.0.
 # The point is for the user to remove these configuration records
 # one by one as the offenses are removed from the code base.
 # Note that changes in the inspected code, or installation of new
@@ -38,7 +38,7 @@ Metrics/MethodLength:
 # Offense count: 1
 # Configuration parameters: CountComments.
 Metrics/ModuleLength:
-  Max: 303
+  Max: 304
 
 # Offense count: 5
 # Configuration parameters: CountKeywordArgs.
@@ -55,6 +55,6 @@ Style/ClassVars:
     - 'lib/stripe/stripe_object.rb'
     - 'test/stripe/api_resource_test.rb'
 
-# Offense count: 51
+# Offense count: 52
 Style/Documentation:
   Enabled: false

lib/stripe.rb

@@ -52,6 +52,7 @@
 require "stripe/dispute"
 require "stripe/ephemeral_key"
 require "stripe/event"
+require "stripe/exchange_rate"
 require "stripe/file_upload"
 require "stripe/invoice"
 require "stripe/invoice_item"

lib/stripe/exchange_rate.rb

@@ -0,0 +1,11 @@
+module Stripe
+  class ExchangeRate < APIResource
+    extend Stripe::APIOperations::List
+
+    OBJECT_NAME = "exchange_rate".freeze
+
+    def self.resource_url
+      "/v1/exchange_rates"
+    end
+  end
+end

lib/stripe/util.rb

@@ -61,6 +61,7 @@ def self.object_classes
         Dispute::OBJECT_NAME              => Dispute,
         EphemeralKey::OBJECT_NAME         => EphemeralKey,
         Event::OBJECT_NAME                => Event,
+        ExchangeRate::OBJECT_NAME         => ExchangeRate,
         FileUpload::OBJECT_NAME           => FileUpload,
         Invoice::OBJECT_NAME              => Invoice,
         InvoiceItem::OBJECT_NAME          => InvoiceItem,

test/stripe/exchange_rate_test.rb

@@ -0,0 +1,44 @@
+require File.expand_path("../../test_helper", __FILE__)
+
+module Stripe
+  class ExchangeRateTest < Test::Unit::TestCase
+    should "be listable" do
+      # TODO: remove stub once stripe-mock supports /v1/exchange_rates
+      stub_request(:get, "#{Stripe.api_base}/v1/exchange_rates")
+        .to_return(body: JSON.generate(
+          object: "list",
+          data: [
+            {
+              id: "eur",
+              object: "exchange_rate",
+              rates: { "usd" => 1.18221 },
+            },
+            {
+              id: "usd",
+              object: "exchange_rate",
+              rates: { "eur" => 0.845876 },
+            },
+          ]
+        ))
+
+      list_rates = Stripe::ExchangeRate.list
+      assert_requested :get, "#{Stripe.api_base}/v1/exchange_rates"
+      assert list_rates.data.is_a?(Array)
+      assert list_rates.data.first.is_a?(Stripe::ExchangeRate)
+    end
+
+    should "be retrievable" do
+      # TODO: remove stub once stripe-mock supports /v1/exchange_rates
+      stub_request(:get, "#{Stripe.api_base}/v1/exchange_rates/usd")
+        .to_return(body: JSON.generate(
+          id: "usd",
+          object: "exchange_rate",
+          rates: { "eur" => 0.845876 }
+        ))
+
+      rates = Stripe::ExchangeRate.retrieve("usd")
+      assert_requested :get, "#{Stripe.api_base}/v1/exchange_rates/usd"
+      assert rates.is_a?(Stripe::ExchangeRate)
+    end
+  end
+end