fix: create event error when event name is invalid (#42)

Co-authored-by: xiaoweii <xiaoweii@amazom.com>

Author: zhu-xiaowei

clickstream/src/main/java/software/aws/solution/clickstream/AWSClickstreamPlugin.java

@@ -90,7 +90,9 @@ public void enable() {
     @Override
     public void recordEvent(@NonNull String eventName) {
         final AnalyticsEvent event = analyticsClient.createEvent(eventName);
-        analyticsClient.recordEvent(event);
+        if (event != null) {
+            analyticsClient.recordEvent(event);
+        }
     }
 
     @Override

clickstream/src/test/java/software/aws/solution/clickstream/IntegrationTest.java

@@ -130,6 +130,26 @@ public void testRecordEventWithName() throws Exception {
         assertEquals(0, dbUtil.getTotalNumber());
     }
 
+    /**
+     * test record event with invalid name.
+     *
+     * @throws Exception exception
+     */
+    @Test
+    public void testRecordEventWithInvalidName() throws Exception {
+        executeBackground();
+        ClickstreamAnalytics.recordEvent("01TestEvent");
+        try (Cursor cursor = dbUtil.queryAllEvents()) {
+            cursor.moveToFirst();
+            String eventString = cursor.getString(2);
+            JSONObject jsonObject = new JSONObject(eventString);
+            assertEquals(Event.PresetEvent.CLICKSTREAM_ERROR, jsonObject.getString("event_type"));
+        }
+        assertEquals(1, dbUtil.getTotalNumber());
+        Thread.sleep(1500);
+        assertEquals(0, dbUtil.getTotalNumber());
+    }
+
     /**
      * test record one AnalyticsEvent use ClickstreamAnalytics api and
      * make sure the event data is valid from db.