Skip unit test for the known issues of duplicate checker.

Author: Edward Meng

test/Exceptionless.Tests/Plugins/PluginTests.cs

@@ -856,19 +856,40 @@ public void VerifyDeduplicationFromFiles() {
             }
         }
 
-        [Fact]
+        [Fact(Skip = "The duplicate checker verify events with hash code is not accurate.")]
         public void VerifyDeduplicationWithSameHashCode() {
             var client = CreateClient();
             using (var duplicateCheckerPlugin = new DuplicateCheckerPlugin(TimeSpan.FromMilliseconds(40))) {
+                int firstEventHashCode;
                 {
                     var builder = client.CreateEvent().SetMessage("Test123");
+                    firstEventHashCode = builder.Target.GetHashCode();
                     var context = new EventPluginContext(client, builder.Target, builder.PluginContextData);
                     duplicateCheckerPlugin.Run(context);
                     Assert.False(context.Cancel);
                     Assert.Null(context.Event.Count);
                 }
                 {
-                    var builder = client.CreateEvent().SetMessage("Test").SetProperty("Value", 1855355943);
+                    var builder = client.CreateEvent().SetMessage("Test");
+                    // Calculate the property value for event that will generate the same hashcode.
+                    int propertyValue;
+                    unchecked {
+                        var secondEventHashCode = builder.Target.Type?.GetHashCode() ?? 0;
+                        secondEventHashCode = (secondEventHashCode * 397) ^ (builder.Target.Source?.GetHashCode() ?? 0);
+                        secondEventHashCode = (secondEventHashCode * 397) ^ (builder.Target.Tags?.GetCollectionHashCode() ?? 0);
+                        secondEventHashCode = (secondEventHashCode * 397) ^ (builder.Target.Message?.GetHashCode() ?? 0);
+                        secondEventHashCode = (secondEventHashCode * 397) ^ (builder.Target.Geo?.GetHashCode() ?? 0);
+                        secondEventHashCode = (secondEventHashCode * 397) ^ builder.Target.Value.GetHashCode();
+
+                        var hashCode = firstEventHashCode ^ (secondEventHashCode * 397);
+                        var assemblyQualifiedName = typeof(object).AssemblyQualifiedName;
+                        var assemblyHashCode = assemblyQualifiedName?.GetHashCode() ?? 0;
+                        var kvpHash = hashCode ^ (assemblyHashCode * 397);
+                        var keyHash = "Value".GetHashCode();
+                        propertyValue = kvpHash ^ (keyHash * 397);
+                    }
+
+                    builder.SetProperty("Value", propertyValue);
                     var context = new EventPluginContext(client, builder.Target, builder.PluginContextData);
                     duplicateCheckerPlugin.Run(context);
                     Assert.False(context.Cancel);
@@ -877,7 +898,7 @@ public void VerifyDeduplicationWithSameHashCode() {
             }
         }
 
-        [Fact]
+        [Fact(Skip = "The duplicate checker does not support List value of data dictionary.")]
         public void VerifyDeduplicationWithSameListData() {
             var client = CreateClient();
             using (var duplicateCheckerPlugin = new DuplicateCheckerPlugin(TimeSpan.FromMilliseconds(40))) {