jobs: extract an RetryOnTranscientErrors concern

spec/support/shared_examples_for_jobs.rb

@@ -0,0 +1,29 @@
+RSpec.shared_examples 'a job retrying transient errors' do |job_class = described_class|
+  context 'when a transient network error is raised' do
+    ExconErrorJob = Class.new(job_class) do
+      def perform
+        raise Excon::Error::InternalServerError, 'msg'
+      end
+    end
+
+    it 'makes 5 attempts before raising the exception up' do
+      assert_performed_jobs 5 do
+        ExconErrorJob.perform_later rescue Excon::Error::InternalServerError
+      end
+    end
+  end
+
+  context 'when another type of error is raised' do
+    StandardErrorJob = Class.new(job_class) do
+      def perform
+        raise StandardError
+      end
+    end
+
+    it 'makes only 1 attempt before raising the exception up' do
+      assert_performed_jobs 1 do
+        StandardErrorJob.perform_later rescue StandardError
+      end
+    end
+  end
+end