Fix test cases

Author: esrakartalOpt

lib/optimizely/event/entity/event_batch.rb

@@ -48,7 +48,7 @@ def build
         event_batch.anonymize_ip = @anonymize_ip
         event_batch.enrich_decisions = @enrich_decisions
         event_batch.visitors = @visitors
-        event_batch.region = @region
+        event_batch.region = @region || 'US'
         event_batch
       end
 
@@ -65,7 +65,7 @@ def with_revision(revision)
       end
 
       def with_region(region)
-        @region = region
+        @region = region || 'US'
       end
 
       def with_client_name(client_name)

spec/event/event_entities_spec.rb

@@ -69,7 +69,8 @@
       revision: '42',
       client_name: Optimizely::CLIENT_ENGINE,
       enrich_decisions: true,
-      client_version: Optimizely::VERSION
+      client_version: Optimizely::VERSION,
+      region: 'US'
     }
 
     @expected_conversion_payload = {
@@ -103,7 +104,8 @@
       revision: '42',
       client_name: Optimizely::CLIENT_ENGINE,
       enrich_decisions: true,
-      client_version: Optimizely::VERSION
+      client_version: Optimizely::VERSION,
+      region: 'US'
     }
   end