Add delete operation to the webhook resource (#22)

Author: oiuzikov

CHANGELOG.md

@@ -3,6 +3,7 @@
 - Add attribute ```metadata``` to class ```Shipcloud::Shipment``` in order to transmit JSON data (#16).
 - Add resource pickup_request in order to submit pickup request to shipcloud
 - Add attribute ```pickup_address``` to class ```Shipcloud::PickupRequest``` to submit an alternative address for pickup request to shipcloud
+- Add ```delete``` operation for ```webhook``` resource
 - Add attribute ```deactivated``` to class ```Shipcloud::Webhook```
 - Add ```affiliate_id``` to ```Shipcloud::Configuration``` and submit it (or a default affiliate id) via API headers to shipcloud
 - Add class ```Shipcloud::Tracker``` with create, find, and index operations

lib/shipcloud/webhook.rb

@@ -1,6 +1,7 @@
 module Shipcloud
   class Webhook < Base
     include Shipcloud::Operations::All
+    include Shipcloud::Operations::Delete
 
     attr_reader :url, :event_types, :deactivated
 

spec/shipcloud/webhooks_spec.rb

@@ -52,6 +52,15 @@
     end
   end
 
+  describe ".delete" do
+    it "makes a DELETE request using the correct API endpoint" do
+      expect(Shipcloud).to receive(:request).
+        with(:delete, "webhooks/123", {}, api_key: nil).
+        and_return(true)
+      Shipcloud::Webhook.delete("123")
+    end
+  end
+
   describe ".deactivated" do
     let(:id) { "123" }