119 lines
6.2 KiB
C#
119 lines
6.2 KiB
C#
#region Copyright notice and license
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// Protocol Buffers - Google's data interchange format
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// Copyright 2008 Google Inc. All rights reserved.
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// https://developers.google.com/protocol-buffers/
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#endregion
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using NUnit.Framework;
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using System.Diagnostics;
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using System;
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using System.Reflection;
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using System.IO;
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namespace Google.Protobuf
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{
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public class RefStructCompatibilityTest
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{
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/// <summary>
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/// Checks that the generated code can be compiler with an old C# compiler.
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/// The reason why this test is needed is that even though dotnet SDK projects allow to set LangVersion,
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/// this setting doesn't accurately simulate compilation with an actual old pre-roslyn C# compiler.
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/// For instance, the "ref struct" types are only supported by C# 7.2 and higher, but even if
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/// LangVersion is set low, the roslyn compiler still understands the concept of ref struct
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/// and silently accepts them. Therefore we try to build the generated code with an actual old C# compiler
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/// to be able to catch these sort of compatibility problems.
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/// </summary>
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[Test]
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public void GeneratedCodeCompilesWithOldCsharpCompiler()
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{
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if (Environment.OSVersion.Platform != PlatformID.Win32NT)
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{
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// This tests needs old C# compiler which is only available on Windows. Skipping it on all other platforms.
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return;
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}
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var currentAssemblyDir = Path.GetDirectoryName(typeof(RefStructCompatibilityTest).GetTypeInfo().Assembly.Location);
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var testProtosProjectDir = Path.GetFullPath(Path.Combine(currentAssemblyDir, "..", "..", "..", "..", "Google.Protobuf.Test.TestProtos"));
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var testProtosOutputDir = (currentAssemblyDir.Contains("bin/Debug/") || currentAssemblyDir.Contains("bin\\Debug\\")) ? "bin\\Debug\\net45" : "bin\\Release\\net45";
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// If "ref struct" types are used in the generated code, compilation with an old compiler will fail with the following error:
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// "XYZ is obsolete: 'Types with embedded references are not supported in this version of your compiler.'"
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// We build the code with GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE to avoid the use of ref struct in the generated code.
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var compatibilityFlag = "-define:GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE";
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var sources = "*.cs"; // the generated sources from the TestProtos project
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var args = $"-langversion:3 -target:library {compatibilityFlag} -reference:{testProtosOutputDir}\\Google.Protobuf.dll -out:{testProtosOutputDir}\\TestProtos.RefStructCompatibilityTest.OldCompiler.dll {sources}";
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RunOldCsharpCompilerAndCheckSuccess(args, testProtosProjectDir);
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}
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/// <summary>
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/// Invoke an old C# compiler in a subprocess and check it finished successful.
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/// </summary>
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/// <param name="args"></param>
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/// <param name="workingDirectory"></param>
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private void RunOldCsharpCompilerAndCheckSuccess(string args, string workingDirectory)
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{
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using (var process = new Process())
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{
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// Get the path to the old C# 5 compiler from .NET framework. This approach is not 100% reliable, but works on most machines.
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// Alternative way of getting the framework path is System.Runtime.InteropServices.RuntimeEnvironment.GetRuntimeDirectory()
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// but it only works with the net45 target.
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var oldCsharpCompilerPath = Path.Combine(Environment.GetEnvironmentVariable("WINDIR"), "Microsoft.NET", "Framework", "v4.0.30319", "csc.exe");
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process.StartInfo.FileName = oldCsharpCompilerPath;
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process.StartInfo.RedirectStandardOutput = true;
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process.StartInfo.RedirectStandardError = true;
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process.StartInfo.UseShellExecute = false;
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process.StartInfo.Arguments = args;
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process.StartInfo.WorkingDirectory = workingDirectory;
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process.OutputDataReceived += (sender, e) =>
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{
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if (e.Data != null)
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{
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Console.WriteLine(e.Data);
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}
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};
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process.ErrorDataReceived += (sender, e) =>
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{
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if (e.Data != null)
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{
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Console.WriteLine(e.Data);
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}
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};
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process.Start();
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process.BeginErrorReadLine();
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process.BeginOutputReadLine();
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process.WaitForExit();
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Assert.AreEqual(0, process.ExitCode);
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}
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}
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}
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} |