feat: Add function in retrieve all pickups (#238)

- Add (enable) function to retrieve all pickups
- Add (enable) unit test to test retrieving all pickups

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 ## [Unreleased]
 
+- Added function to retrieve all pickups, accessible via `EasyPost::Pickup.all`
 - Added payload functions `retrieve_all_payloads` and `retrieve_payload` to retrieve all payloads or a specific payload for an event.
 
 ## v4.10.0 (2023-01-11)

lib/easypost/pickup.rb

@@ -25,11 +25,6 @@ def cancel(params = {})
     self
   end
 
-  # Retrieve a list of all Pickup objects.
-  def self.all(_filters = {}, _api_key = nil)
-    raise NotImplementedError.new('Pickup.all not implemented.')
-  end
-
   # Get the lowest rate of a Pickup (can exclude by having `'!'` as the first element of your optional filter lists).
   def lowest_rate(carriers = [], services = [])
     EasyPost::Util.get_lowest_object_rate(self, carriers, services, 'pickup_rates')

spec/pickup_spec.rb

@@ -35,8 +35,16 @@
   end
 
   describe '.all' do
-    it 'raises not implemented error' do
-      expect { described_class.all }.to raise_error(NotImplementedError)
+    it 'retrieves all pickups' do
+      pickups = described_class.all(
+        page_size: Fixture.page_size,
+      )
+
+      pickups_array = pickups.pickups
+
+      expect(pickups_array.count).to be <= Fixture.page_size
+      expect(pickups.has_more).not_to be_nil
+      expect(pickups_array).to all(be_an_instance_of(described_class))
     end
   end