Imported Upstream version 5.4.0.167

Former-commit-id: 5624ac747d633e885131e8349322922b6a59baaa

external/linker/corebuild/integration/test/TestContext.cs

@@ -0,0 +1,96 @@
+using System;
+using System.IO;
+using System.Linq;
+using Microsoft.DotNet.PlatformAbstractions;
+
+namespace ILLink.Tests
+{
+	public class TestContext
+	{
+		/// <summary>
+		///   The name of the tasks package to add to the integration
+		///   projects.
+		/// </summary>
+		public string TasksPackageName { get; private set; }
+
+		/// <summary>
+		///   The version of the tasks package to add to the
+		///   integration projects.
+		/// </summary>
+		public string TasksPackageVersion { get; private set; }
+
+		/// <summary>
+		///   The path of the directory from which to get the linker
+		///   package.
+		/// </summary>
+		public string PackageSource { get; private set; }
+
+		/// <summary>
+		///   The path to the dotnet tool to use to run the
+		///   integration tests.
+		/// </summary>
+		public string DotnetToolPath { get; private set; }
+
+		/// <summary>
+		///   The RID to use when restoring, building, and linking the
+		///   integration test projects.
+		/// </summary>
+		public string RuntimeIdentifier { get; private set; }
+
+		/// <summary>
+		///   The configuration to use to build the integration test
+		///   projects.
+		/// </summary>
+		public string Configuration { get; private set; }
+
+		/// <summary>
+		///   This is the context from which tests will be run in the
+		///   linker repo. The local directory that contains the
+		///   linker integration packages (hard-coded here) is
+		///   searched for the tasks package. This assumes that only
+		///   one version of the package is present, and uses it to
+		///   unambiguously determine which pacakge to use in the tests.
+		/// </summary>
+		public static TestContext CreateDefaultContext()
+		{
+			var packageName = "ILLink.Tasks";
+			var packageSource = "../../../../nupkgs";
+			var tasksPackages = Directory.GetFiles(packageSource)
+				.Where(p => Path.GetExtension(p) == ".nupkg")
+				.Select(p => Path.GetFileNameWithoutExtension(p))
+				.Where(p => p.StartsWith(packageName));
+			var nPackages = tasksPackages.Count();
+			if (nPackages > 1) {
+				throw new Exception($"duplicate {packageName} packages in {packageSource}");
+			} else if (nPackages == 0) {
+				throw new Exception($"{packageName} package not found in {packageSource}");
+			}
+			var tasksPackage = tasksPackages.Single();
+			var version = tasksPackage.Remove(0, packageName.Length + 1);
+			var dotnetDir = "../../../../../../corebuild/Tools/dotnetcli";
+			var dotnetToolNames = Directory.GetFiles(dotnetDir)
+				.Select(p => Path.GetFileName(p))
+				.Where(p => p.Contains("dotnet"));
+			var nTools = dotnetToolNames.Count();
+			if (nTools > 1) {
+				throw new Exception($"multiple dotnet tools in {dotnetDir}");
+			} else if (nTools == 0) {
+				throw new Exception($"no dotnet tool found in {dotnetDir}");
+			}
+			var dotnetToolName = dotnetToolNames.Single();
+			var dotnetToolPath = Path.Combine(dotnetDir, dotnetToolName);
+
+			var context = new TestContext();
+			context.PackageSource = packageSource;
+			context.TasksPackageName = packageName;
+			context.TasksPackageVersion = version;
+			context.DotnetToolPath = dotnetToolPath;
+			// This sets the RID to the RID of the currently-executing system.
+			context.RuntimeIdentifier = RuntimeEnvironment.GetRuntimeIdentifier();
+			// We want to build and link integration projects in the
+			// release configuration.
+			context.Configuration = "Release";
+			return context;
+		}
+	}
+}