Report backorder errors instead of failing checkout

app/jobs/backorder_job.rb

@@ -23,12 +23,25 @@ def self.check_stock(order)
     end
 
     perform_later(order, linked_variants) if linked_variants.present?
+  rescue StandardError => e
+    # Errors here shouldn't affect the checkout. So let's report them
+    # separately:
+    Bugsnag.notify(e) do |payload|
+      payload.add_metadata(:order, order)
+    end
   end
 
   def perform(order, linked_variants)
     OrderLocker.lock_order_and_variants(order) do
       place_backorder(order, linked_variants)
     end
+  rescue StandardError => e
+    # If the backordering fails, we need to tell the shop owner because they
+    # need to organgise more stock.
+    Bugsnag.notify(e) do |payload|
+      payload.add_metadata(:order, order)
+      payload.add_metadata(:linked_variants, linked_variants)
+    end
   end
 
   def place_backorder(order, linked_variants)

spec/jobs/backorder_job_spec.rb

@@ -36,6 +36,24 @@
         BackorderJob.check_stock(order)
       }.to enqueue_job(BackorderJob).with(order, [variant])
     end
+
+    it "reports errors" do
+      expect(Bugsnag).to receive(:notify).and_call_original
+
+      expect {
+        BackorderJob.check_stock(nil)
+      }.not_to raise_error
+    end
+  end
+
+  describe "#peform" do
+    it "reports errors" do
+      expect(Bugsnag).to receive(:notify).and_call_original
+
+      expect {
+        subject.perform(nil, [])
+      }.not_to raise_error
+    end
   end
 
   describe "#place_backorder" do