Add test for null EventName in FormattedMessage event

dotnet · Feb 13, 2020 · f6bc94a · f6bc94a
1 parent 27ac3e5
commit f6bc94a
Showing 1 changed file with 29 additions and 0 deletions.
diff --git a/src/Logging/Logging.EventSource/test/EventSourceLoggerTest.cs b/src/Logging/Logging.EventSource/test/EventSourceLoggerTest.cs
@@ -427,6 +427,35 @@ public void Logs_Nothing_AfterDispose()
             }
         }
 
+        [Fact]
+        public void Logs_AsExpected_FormattedMessage_WithNullString()
+        {
+            using (var testListener = new TestEventListener())
+            {
+                var factory = CreateLoggerFactory();
+
+                var listenerSettings = new TestEventListener.ListenerSettings();
+                listenerSettings.Keywords = LoggingEventSource.Keywords.FormattedMessage;
+                listenerSettings.FilterSpec = null;
+                listenerSettings.Level = EventLevel.Verbose;
+                testListener.EnableEvents(listenerSettings);
+
+                LogStuff(factory);
+
+                var containsNullEventName = false;
+
+                foreach (var eventJson in testListener.Events)
+                {
+                    if (eventJson.Contains(@"""__EVENT_NAME"":""FormattedMessage""") && eventJson.Contains(@"""EventName"":"""","))
+                    {
+                        containsNullEventName = true;
+                    }
+                }
+
+                Assert.True(containsNullEventName, "EventName is supposed to be null but it isn't.");
+            }
+        }
+
         private void LogStuff(ILoggerFactory factory)
         {
             var logger1 = factory.CreateLogger("Logger1");