Fix sentry-delayed_job: respect custom max_attempts

sentry-delayed_job/lib/sentry/delayed_job/plugin.rb

@@ -87,7 +87,8 @@ def self.report?(job)
 
         # We use the predecessor because the job's attempts haven't been increased to the new
         # count at this point.
-        job.attempts >= Delayed::Worker.max_attempts.pred
+        max_attempts = job&.max_attempts&.pred || Delayed::Worker.max_attempts.pred
+        job.attempts >= max_attempts
       end
 
       def self.finish_transaction(transaction, status)

sentry-delayed_job/spec/sentry/delayed_job_spec.rb

@@ -143,6 +143,22 @@ def self.class_do_nothing
         expect(transport.events.count).to eq(1)
       end
 
+      # Default max_attemps is defined on Delayed::Worker.max_attempts == 25.
+      # However, users can customize max_attempts on the job class, and DelayedJob
+      # will respect that.
+      # Sentry needs to report an exception if report_after_retries is true and
+      # custom job-level max_attempts is reached.
+      # See https://github.com/collectiveidea/delayed_job#custom-jobs
+      it "reports exception after the job's custom max_attempts" do
+        enqueued_job.update(attempts:2)
+        allow(enqueued_job).to receive(:max_attempts).and_return(3)
+
+        expect do
+          enqueued_job.invoke_job
+        end.to raise_error(ZeroDivisionError)
+        expect(transport.events.count).to eq(1)
+      end
+
       it "skips report if not on the last retry" do
         enqueued_job.update(attempts: 0)