2 files changed, 112 insertions, 0 deletions

diff --git a/src/tools/test/WixToolsetTest.Heat/HeatRunner.cs b/src/tools/test/WixToolsetTest.Heat/HeatRunner.cs
new file mode 100644
index 00000000..287698a9
--- /dev/null
+++ b/src/tools/test/WixToolsetTest.Heat/HeatRunner.cs
@@ -0,0 +1,92 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolsetTest.Harvesters
+{
+    using System;
+    using System.Collections.Generic;
+    using System.Threading;
+    using System.Threading.Tasks;
+    using WixToolset.Core;
+    using WixToolset.Core.Burn;
+    using WixToolset.Core.TestPackage;
+    using WixToolset.Data;
+    using WixToolset.Extensibility.Data;
+    using WixToolset.Extensibility.Services;
+    using WixToolset.Harvesters;
+
+    /// <summary>
+    /// Utility class to emulate heat.exe.
+    /// </summary>
+    public static class HeatRunner
+    {
+        /// <summary>
+        /// Emulates calling heat.exe.
+        /// </summary>
+        /// <param name="args"></param>
+        /// <param name="messages"></param>
+        /// <param name="warningsAsErrors"></param>
+        /// <returns></returns>
+        public static int Execute(string[] args, out List<Message> messages, bool warningsAsErrors = true)
+        {
+            var serviceProvider = WixToolsetServiceProviderFactory.CreateServiceProvider();
+            var task = Execute(args, serviceProvider, out messages, warningsAsErrors: warningsAsErrors);
+            return task.Result;
+        }
+
+        /// <summary>
+        /// Emulates calling wix.exe with standard backends.
+        /// This overload always treats warnings as errors.
+        /// </summary>
+        /// <param name="args"></param>
+        /// <returns></returns>
+        public static WixRunnerResult Execute(params string[] args)
+        {
+            return Execute(true, args);
+        }
+
+        /// <summary>
+        /// Emulates calling wix.exe with standard backends.
+        /// </summary>
+        /// <param name="warningsAsErrors"></param>
+        /// <param name="args"></param>
+        /// <returns></returns>
+        public static WixRunnerResult Execute(bool warningsAsErrors, params string[] args)
+        {
+            var serviceProvider = WixToolsetServiceProviderFactory.CreateServiceProvider();
+            var exitCode = Execute(args, serviceProvider, out var messages, warningsAsErrors: warningsAsErrors);
+            return new WixRunnerResult { ExitCode = exitCode.Result, Messages = messages.ToArray() };
+        }
+
+        /// <summary>
+        /// Emulates calling wix.exe with standard backends.
+        /// </summary>
+        /// <param name="args"></param>
+        /// <param name="coreProvider"></param>
+        /// <param name="messages"></param>
+        /// <param name="warningsAsErrors"></param>
+        /// <returns></returns>
+        public static Task<int> Execute(string[] args, IWixToolsetCoreServiceProvider coreProvider, out List<Message> messages, bool warningsAsErrors = true)
+        {
+            coreProvider.AddBundleBackend();
+
+            var listener = new TestMessageListener();
+
+            messages = listener.Messages;
+
+            var messaging = coreProvider.GetService<IMessaging>();
+            messaging.SetListener(listener);
+
+            if (warningsAsErrors)
+            {
+                messaging.WarningsAsError = true;
+            }
+
+            var arguments = coreProvider.GetService<ICommandLineArguments>();
+            arguments.Populate(args);
+
+            var commandLine = HeatCommandLineFactory.CreateCommandLine(coreProvider);
+            var command = commandLine.ParseStandardCommandLine(arguments);
+            return command?.ExecuteAsync(CancellationToken.None) ?? Task.FromResult(1);
+        }
+    }
+}
diff --git a/src/tools/test/WixToolsetTest.Heat/WixToolsetTest.Heat.csproj b/src/tools/test/WixToolsetTest.Heat/WixToolsetTest.Heat.csproj
new file mode 100644
index 00000000..73eb078c
--- /dev/null
+++ b/src/tools/test/WixToolsetTest.Heat/WixToolsetTest.Heat.csproj
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <IsPackable>false</IsPackable>
+    <SignOutput>false</SignOutput>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="WixBuildTools.TestSupport" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.NET.Test.Sdk" />
+    <PackageReference Include="xunit" />
+    <PackageReference Include="xunit.runner.visualstudio" PrivateAssets="All" />
+  </ItemGroup>
+</Project>