Set Functions_Worker_Directory during specialization (#6428)

Author: pragnagopa

src/WebJobs.Script/Workers/Rpc/RpcWorkerChannel.cs

@@ -292,7 +292,7 @@ internal FunctionEnvironmentReloadRequest GetFunctionEnvironmentReloadRequest(ID
                     request.EnvironmentVariables.Add(entry.Key.ToString(), entry.Value.ToString());
                 }
             }
-
+            request.EnvironmentVariables.Add(WorkerConstants.FunctionsWorkerDirectorySettingName, _workerConfig.Description.WorkerDirectory);
             request.FunctionAppDirectory = _applicationHostOptions.CurrentValue.ScriptPath;
 
             return request;

test/WebJobs.Script.Tests.Shared/TestHelpers.cs

@@ -323,7 +323,8 @@ public static RpcWorkerDescription GetTestWorkerDescription(string language, str
                  {
                      { extension }
                  },
-                Language = language
+                Language = language,
+                WorkerDirectory = "testDir"
             };
         }
 

test/WebJobs.Script.Tests/Workers/Rpc/RpcWorkerChannelTests.cs

@@ -331,6 +331,8 @@ public void SendFunctionEnvironmentReloadRequest_SanitizedEnvironmentVariables()
             Assert.False(envReloadRequest.EnvironmentVariables.ContainsKey("TestEmpty"));
             Assert.True(envReloadRequest.EnvironmentVariables.ContainsKey("TestValid"));
             Assert.True(envReloadRequest.EnvironmentVariables["TestValid"] == "TestValue");
+            Assert.True(envReloadRequest.EnvironmentVariables.ContainsKey(WorkerConstants.FunctionsWorkerDirectorySettingName));
+            Assert.True(envReloadRequest.EnvironmentVariables[WorkerConstants.FunctionsWorkerDirectorySettingName] == "testDir");
         }
 
         [Fact]