Fixing duplicate compilation logs (#1866)

Author: mathewc

src/WebJobs.Script/Description/FunctionInvokerBase.cs

@@ -138,9 +138,8 @@ protected virtual void OnScriptFileChanged(FileSystemEventArgs e)
         {
         }
 
-        protected void TraceOnPrimaryHost(string message, TraceLevel level, string source = null,  Exception exception = null)
+        protected internal void TraceOnPrimaryHost(string message, TraceLevel level, string source = null,  Exception exception = null)
         {
-            TraceWriter.Trace(message, level, PrimaryHostTraceProperties);
             var traceEvent = new TraceEvent(level, message, source, exception);
             foreach (var item in PrimaryHostTraceProperties)
             {

test/WebJobs.Script.Tests/Description/FunctionInvokerBaseTests.cs

@@ -49,6 +49,20 @@ public FunctionInvokerBaseTests()
             funcDescriptor.Name = metadata.Name;
         }
 
+        [Fact]
+        public void TraceOnPrimaryHost_WritesExpectedLogs()
+        {
+            _traceWriter.Traces.Clear();
+
+            _invoker.TraceOnPrimaryHost("Test message", TraceLevel.Info, "TestSource");
+
+            Assert.Equal(1, _traceWriter.Traces.Count);
+            var trace = _traceWriter.Traces[0];
+            Assert.Equal("Test message", trace.Message);
+            Assert.Equal(TraceLevel.Info, trace.Level);
+            Assert.Equal("TestSource", trace.Source);
+        }
+
         [Fact]
         public void LogInvocationMetrics_EmitsExpectedEvents()
         {