Implemented vstest verb which will run the test from given container. (#4115)

* Implemented vstest verb which will run the test from given container.

* Fixed Nitpick.

* 1) Addressed PR comment
2) Added tests for vstest verb

* Using specific version of Microsoft.TestPlatform.

* Address PR comments.

Modified help text for the vstest command.
Removed unused function.

* Fixed package related issue.
--Taking reference of microsoft.testplatform.cli nuget package which has contentFolder in it so that sub folder of this nuget can also be added in cli package.
-- Removing vstest.console, vshost and datacollector from Bundletools as we dont want *.deps.json to be override

* Nitpick

* Making vstest.console arguments compatible for non windows platform

* Fix tests to run on linux machine

* Updated the microsoft.testplatform.cli nuget package version. This version has fix related to non windows machine.

* changed dapter path from bin/debug to bin/Debug

* updated nuget version of package Microsoft.TestPlatform.CLI.

* Revert "updated nuget version of package Microsoft.TestPlatform.CLI."

This reverts commit bcc26c21d11c2bd2e5259a74f9890b0fd75962c7.

* Updated version of nuget package Microsoft.TestPlatform.CLI
Added Test project in solution file

* Addressed PR comment.

* Removed unnecessary --platform argument from test

test/Microsoft.DotNet.Tools.Tests.Utilities/Commands/VSTestCommand.cs

@@ -0,0 +1,27 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using Microsoft.DotNet.Cli.Utils;
+
+namespace Microsoft.DotNet.Tools.Test.Utilities
+{
+    public sealed class VSTestCommand: TestCommand
+    {
+        public VSTestCommand()
+            :base("dotnet")
+        {
+        }
+
+        public override CommandResult Execute(string args = "")
+        {
+            args = $"vstest {args}";
+            return base.Execute(args);
+        }
+
+        public override CommandResult ExecuteWithCapturedOutput(string args = "")
+        {
+            args = $"vstest {args}";
+            return base.ExecuteWithCapturedOutput(args);
+        }
+    }
+}

test/dotnet-vstest.Tests/VSTestTests.cs

@@ -0,0 +1,47 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using Microsoft.DotNet.Tools.Test.Utilities;
+using Xunit;
+using System;
+using System.IO;
+using FluentAssertions;
+using Microsoft.DotNet.TestFramework;
+using Microsoft.DotNet.Cli.Utils;
+
+namespace Microsoft.DotNet.Cli.VSTest.Tests
+{
+    public class VSTestTests: TestBase
+    {
+        [Fact]
+        public void TestsFromAGivenContainerShouldRunWithExpectedOutput()
+        {
+            // Copy DotNetCoreTestProject project in output directory of project dotnet-vstest.Tests
+            string testAppName = "VSTestDotNetCoreProject";
+            TestInstance testInstance = TestAssetsManager.CreateTestInstance(testAppName).WithLockFiles();
+
+            string testProjectDirectory = testInstance.TestRoot;
+
+            // Build project DotNetCoreTestProject
+            new Build3Command()
+                .WithWorkingDirectory(testProjectDirectory)
+                .Execute()
+                .Should()
+                .Pass();
+
+            // Prepare args to send vstest
+            string configuration = Environment.GetEnvironmentVariable("CONFIGURATION") ?? "Debug";
+            string testAdapterPath = Path.Combine(testProjectDirectory, "bin", configuration, "netcoreapp1.0");
+            string outputDll = Path.Combine(testAdapterPath, $"{testAppName}.dll");
+            string argsForVstest = string.Concat("\"", outputDll, "\"", " --TestAdapterPath:", "\"", testAdapterPath, "\"");
+
+            // Call vstest
+            CommandResult result = new VSTestCommand().ExecuteWithCapturedOutput(argsForVstest);
+
+            // Verify
+            result.StdOut.Should().Contain("Total tests: 2. Passed: 1. Failed: 1. Skipped: 0.");
+            result.StdOut.Should().Contain("Passed   TestNamespace.VSTestTests.VSTestPassTest");
+            result.StdOut.Should().Contain("Failed   TestNamespace.VSTestTests.VSTestFailTest");
+        }
+    }
+}

test/dotnet-vstest.Tests/dotnet-vstest.Tests.xproj

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="14.0.23107" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <VisualStudioVersion Condition="'$(VisualStudioVersion)' == ''">14.0.23107</VisualStudioVersion>
+    <VSToolsPath Condition="'$(VSToolsPath)' == ''">$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)</VSToolsPath>
+  </PropertyGroup>
+  <Import Project="$(VSToolsPath)\DotNet\Microsoft.DotNet.Props" Condition="'$(VSToolsPath)' != ''" />
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>9f5ae280-a040-4160-9799-6504d907742d</ProjectGuid>
+    <RootNamespace>Microsoft.DotNet.Cli.VSTest.Tests</RootNamespace>
+    <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)'=='' ">..\..\artifacts\obj\$(MSBuildProjectName)</BaseIntermediateOutputPath>
+    <OutputPath Condition="'$(OutputPath)'=='' ">..\..\artifacts\bin</OutputPath>
+  </PropertyGroup>
+  <PropertyGroup>
+    <SchemaVersion>2.0</SchemaVersion>
+  </PropertyGroup>
+  <ItemGroup>
+    <Service Include="{82a7f48d-3b50-4b1e-b82e-3ada8210c358}" />
+  </ItemGroup>
+  <Import Project="$(VSToolsPath)\DNX\Microsoft.DNX.targets" Condition="'$(VSToolsPath)' != ''" />
+</Project>

test/dotnet-vstest.Tests/project.json

@@ -0,0 +1,24 @@
+{
+  "version": "1.0.0-*",
+  "dependencies": {
+    "Microsoft.NETCore.App": {
+      "type": "platform",
+      "version": "1.0.0"
+    },
+    "System.Runtime.Serialization.Primitives": "4.1.1",
+    "Microsoft.DotNet.Tools.Tests.Utilities": {
+      "target": "project"
+    },
+    "xunit": "2.2.0-beta3-build3330",
+    "dotnet-test-xunit": "1.0.0-rc2-330423-54"
+  },
+  "frameworks": {
+    "netcoreapp1.0": {
+      "imports": [
+        "dotnet5.4",
+        "portable-net451+win8"
+      ]
+    }
+  },
+  "testRunner": "xunit"
+}