1 files changed, 53 insertions, 0 deletions
diff --git a/src/csharp/Grpc.Tools.Tests/ProtoToolsPlatformTaskTest.cs b/src/csharp/Grpc.Tools.Tests/ProtoToolsPlatformTaskTest.cs
new file mode 100644
index 0000000000..235f8de527
--- /dev/null
+++ b/src/csharp/Grpc.Tools.Tests/ProtoToolsPlatformTaskTest.cs
@@ -0,0 +1,53 @@
+#region Copyright notice and license
+
+// Copyright 2018 gRPC authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#endregion
+
+using System;
+using Microsoft.Build.Framework;
+using Moq;
+using NUnit.Framework;
+
+namespace Grpc.Tools.Tests {
+  // This test requires that environment variables be set to the expected
+  // output of the task in its external test harness:
+  //   PROTOTOOLS_TEST_CPU = { x64 | x86 }
+  //   PROTOTOOLS_TEST_OS = { linux | macosx | windows }
+  public class ProtoToolsPlatformTaskTest {
+    static string s_expectOs;
+    static string s_expectCpu;
+
+    [OneTimeSetUp]
+    public static void Init() {
+      s_expectCpu = Environment.GetEnvironmentVariable("PROTOTOOLS_TEST_CPU");
+      s_expectOs = Environment.GetEnvironmentVariable("PROTOTOOLS_TEST_OS");
+      if (s_expectCpu == null || s_expectOs == null)
+        Assert.Inconclusive("This test requires PROTOTOOLS_TEST_CPU and " +
+          "PROTOTOOLS_TEST_OS set in the environment to match the OS it runs on.");
+    }
+
+    [Test]
+    public void CpuAndOsMatchExpected() {
+      var mockEng = new Mock<IBuildEngine>();
+      var task = new ProtoToolsPlatform() {
+        BuildEngine = mockEng.Object
+      };
+      task.Execute();
+      Assert.AreEqual(s_expectCpu, task.Cpu);
+      Assert.AreEqual(s_expectOs, task.Os);
+    }
+  };
+}