End to End Test Refactoring. Build upon Publish Test Infrastructure and add

capability for further testing.s enter the commit message for your changes. Lines starting

test/Microsoft.DotNet.Tools.Tests.Utilities/Commands/PackCommand.cs

@@ -0,0 +1,84 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using System;
+using Microsoft.DotNet.Cli.Utils;
+using Microsoft.DotNet.Tools.Test.Utilities;
+
+namespace Microsoft.DotNet.Tools.Test.Utilities
+{
+    public sealed class PackCommand : TestCommand
+    {
+        private string _projectPath;
+        private string _outputDirectory;
+        private string _tempOutputDirectory;
+        private string _configuration;
+        private string _versionSuffix;
+
+        private string OutputOption
+        {
+            get
+            {
+                return _outputDirectory == string.Empty ?
+                                           "" :
+                                           $"-o {_outputDirectory}";
+            }
+        }
+
+        private string TempOutputOption
+        {
+            get
+            {
+                return _tempOutputDirectory == string.Empty ?
+                                           "" :
+                                           $"-t {_tempOutputDirectory}";
+            }
+        }
+
+        private string ConfigurationOption
+        {
+            get
+            {
+                return _configuration == string.Empty ?
+                                           "" :
+                                           $"-c {_configuration}";
+            }
+        }
+
+        private string VersionSuffixOption
+        {
+            get
+            {
+                return _versionSuffix == string.Empty ?
+                                           "" :
+                                           $"--version-suffix {_versionSuffix}";
+            }
+        }
+
+        public PackCommand(
+            string projectPath, 
+            string output="", 
+            string tempOutput="", 
+            string configuration="", 
+            string versionSuffix="")
+            : base("dotnet")
+        {
+            _projectPath = projectPath;
+            _outputDirectory = output;
+            _tempOutputDirectory = tempOutput;
+            _configuration = configuration;
+            _versionSuffix = versionSuffix;
+        }
+
+        public override CommandResult Execute(string args = "")
+        {
+            args = $"pack {BuildArgs()} {args}";
+            return base.Execute(args);
+        }
+
+        private string BuildArgs()
+        {
+            return $"{_projectPath} {OutputOption} {TempOutputOption} {ConfigurationOption} {VersionSuffixOption}";
+        }
+    }
+}