Flags with a version of 0 reported as 'unknown' in summary events. (#239)

Author: kinyoklion

event_processor.js

@@ -76,7 +76,7 @@ function EventProcessor(sdkKey, config, errorReporter, diagnosticsManager) {
         if (event.variation !== undefined && event.variation !== null) {
           out.variation = event.variation;
         }
-        if (event.version) {
+        if (event.version !== undefined && event.version !== null) {
           out.version = event.version;
         }
         if (event.reason) {

event_summarizer.js

@@ -53,7 +53,7 @@ function EventSummarizer() {
       if (c.variation !== undefined && c.variation !== null) {
         counterOut.variation = c.variation;
       }
-      if (c.version) {
+      if (c.version !== undefined && c.version !== null) {
         counterOut.version = c.version;
       } else {
         counterOut.unknown = true;

test/event_processor-test.js

@@ -182,6 +182,21 @@ describe('EventProcessor', () => {
     });
   }));
 
+  it('handles the version being 0', eventsServerTest(async s => {
+    await withEventProcessor(defaultConfig, s, async ep => {
+      const e = { kind: 'feature', creationDate: 1000, user: user, key: 'flagkey',
+        version: 0, variation: 1, value: 'value', trackEvents: true };
+      ep.sendEvent(e);
+      await ep.flush();
+
+      const output = await getJsonRequest(s);
+      expect(output.length).toEqual(3);
+      checkIndexEvent(output[0], e, user);
+      checkFeatureEvent(output[1], e, false);
+      checkSummaryEvent(output[2]);
+    });
+  }));
+
   it('queues individual feature event with index event for anonymous user', eventsServerTest(async s => {
     await withEventProcessor(defaultConfig, s, async ep => {
       const e = { kind: 'feature', creationDate: 1000, user: anonUser, key: 'flagkey',

test/event_summarizer-test.js

@@ -44,15 +44,24 @@ describe('EventSummarizer', function() {
       variation: 1, value: 100, default: 111 };
     var event5 = { kind: 'feature', creationDate: 1000, key: 'badkey', user: user,
       value: 333, default: 333 };
+    var event6 = { kind: 'feature', creationDate: 1000, key: 'zero-version', version: 0, user: user,
+    variation: 1, value: 100, default: 444 };
     es.summarizeEvent(event1);
     es.summarizeEvent(event2);
     es.summarizeEvent(event3);
     es.summarizeEvent(event4);
     es.summarizeEvent(event5);
+    es.summarizeEvent(event6);
     var data = es.getSummary();
 
     data.features.key1.counters.sort(function(a, b) { return a.value - b.value; });
     var expectedFeatures = {
+      'zero-version': {
+        default: 444,
+        counters: [
+          { variation: 1, value: 100, version: 0, count: 1}
+        ]
+      },
       key1: {
         default: 111,
         counters: [
@@ -67,7 +76,7 @@ describe('EventSummarizer', function() {
       badkey: {
         default: 333,
         counters: [ { value: 333, unknown: true, count: 1 }]
-      }
+      },
     };
     expect(data.features).toEqual(expectedFeatures);
   });