1 files changed, 70 insertions, 0 deletions

diff --git a/src/internal/WixBuildTools.TestSupport/Builder.cs b/src/internal/WixBuildTools.TestSupport/Builder.cs
new file mode 100644
index 00000000..ef0de8c9
--- /dev/null
+++ b/src/internal/WixBuildTools.TestSupport/Builder.cs
@@ -0,0 +1,70 @@
+// 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 WixBuildTools.TestSupport
+{
+    using System;
+    using System.Collections.Generic;
+    using System.IO;
+
+    public class Builder
+    {
+        public Builder(string sourceFolder, Type extensionType = null, string[] bindPaths = null, string outputFile = null)
+        {
+            this.SourceFolder = sourceFolder;
+            this.ExtensionType = extensionType;
+            this.BindPaths = bindPaths;
+            this.OutputFile = outputFile ?? "test.msi";
+        }
+
+        public string[] BindPaths { get; set; }
+
+        public Type ExtensionType { get; set; }
+
+        public string OutputFile { get; set; }
+
+        public string SourceFolder { get; }
+
+        public string[] BuildAndQuery(Action<string[]> buildFunc, params string[] tables)
+        {
+            var sourceFiles = Directory.GetFiles(this.SourceFolder, "*.wxs");
+            var wxlFiles = Directory.GetFiles(this.SourceFolder, "*.wxl");
+
+            using (var fs = new DisposableFileSystem())
+            {
+                var intermediateFolder = fs.GetFolder();
+                var outputPath = Path.Combine(intermediateFolder, "bin", this.OutputFile);
+
+                var args = new List<string>
+                {
+                    "build",
+                    "-o", outputPath,
+                    "-intermediateFolder", intermediateFolder,
+                };
+
+                if (this.ExtensionType != null)
+                {
+                    args.Add("-ext");
+                    args.Add(Path.GetFullPath(new Uri(this.ExtensionType.Assembly.CodeBase).LocalPath));
+                }
+
+                args.AddRange(sourceFiles);
+
+                foreach (var wxlFile in wxlFiles)
+                {
+                    args.Add("-loc");
+                    args.Add(wxlFile);
+                }
+
+                foreach (var bindPath in this.BindPaths)
+                {
+                    args.Add("-bindpath");
+                    args.Add(bindPath);
+                }
+
+                buildFunc(args.ToArray());
+
+                return Query.QueryDatabase(outputPath, tables);
+            }
+        }
+    }
+}