Add tests for Worker template

src/ProjectTemplates/scripts/Run-Worker-Locally.ps1

@@ -0,0 +1,12 @@
+#!/usr/bin/env pwsh
+#requires -version 4
+
+[CmdletBinding(PositionalBinding = $false)]
+param()
+
+Set-StrictMode -Version 2
+$ErrorActionPreference = 'Stop'
+
+. $PSScriptRoot\Test-Template.ps1
+
+Test-Template "worker" "worker" "Microsoft.DotNet.Web.ProjectTemplates.3.0.3.0.0-preview4-t000.nupkg" $false

src/ProjectTemplates/test/WorkerTemplateTest.cs

@@ -0,0 +1,82 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using System.IO;
+using System.Threading.Tasks;
+using Templates.Test.Helpers;
+using Xunit;
+using Xunit.Abstractions;
+
+namespace Templates.Test
+{
+    public class WorkerTemplateTest
+    {
+        public WorkerTemplateTest(ProjectFactoryFixture projectFactory, ITestOutputHelper output)
+        {
+            ProjectFactory = projectFactory;
+            Output = output;
+        }
+
+        public Project Project { get; set; }
+
+        public ProjectFactoryFixture ProjectFactory { get; }
+        public ITestOutputHelper Output { get; }
+
+        [Fact]
+        public async Task WorkerTemplate_ImplAsync()
+        {
+            Project = await ProjectFactory.GetOrCreateProject("workercsharp", Output);
+
+            var createResult = await Project.RunDotNetNewAsync("worker");
+            Assert.True(0 == createResult.ExitCode, ErrorMessages.GetFailedProcessMessage("create/restore", Project, createResult));
+
+            var projectExtension = "csproj";
+            var projectFileContents = ReadFile(Project.TemplateOutputDir, $"{Project.ProjectName}.{projectExtension}");
+
+            var publishResult = await Project.RunDotNetPublishAsync();
+            Assert.True(0 == publishResult.ExitCode, ErrorMessages.GetFailedProcessMessage("publish", Project, publishResult));
+
+            // Run dotnet build after publish. The reason is that one uses Config = Debug and the other uses Config = Release
+            // The output from publish will go into bin/Release/netcoreapp3.0/publish and won't be affected by calling build
+            // later, while the opposite is not true.
+
+            var buildResult = await Project.RunDotNetBuildAsync();
+            Assert.True(0 == buildResult.ExitCode, ErrorMessages.GetFailedProcessMessage("build", Project, buildResult));
+
+            using (var aspNetProcess = Project.StartBuiltProjectAsync())
+            {
+                Assert.False(
+                    aspNetProcess.Process.HasExited,
+                    ErrorMessages.GetFailedProcessMessageOrEmpty("Run built project", Project, aspNetProcess.Process));
+            }
+
+            using (var aspNetProcess = Project.StartPublishedProjectAsync())
+            {
+                Assert.False(
+                    aspNetProcess.Process.HasExited,
+                    ErrorMessages.GetFailedProcessMessageOrEmpty("Run published project", Project, aspNetProcess.Process));
+            }
+        }
+
+        private void AssertFileExists(string basePath, string path, bool shouldExist)
+        {
+            var fullPath = Path.Combine(basePath, path);
+            var doesExist = File.Exists(fullPath);
+
+            if (shouldExist)
+            {
+                Assert.True(doesExist, "Expected file to exist, but it doesn't: " + path);
+            }
+            else
+            {
+                Assert.False(doesExist, "Expected file not to exist, but it does: " + path);
+            }
+        }
+
+        private string ReadFile(string basePath, string path)
+        {
+            AssertFileExists(basePath, path, shouldExist: true);
+            return File.ReadAllText(Path.Combine(basePath, path));
+        }
+    }
+}

src/ProjectTemplates/test/template-baselines.json

@@ -383,6 +383,20 @@
       "AuthOption": "None"
     }
   },
+  "worker": {
+    "None": {
+      "Template": "worker",
+      "Arguments": "new worker",
+      "Files": [
+        "appsettings.Development.json",
+        "appsettings.json",
+        "Program.cs",
+        "Worker.cs",
+        "Properties/launchSettings.json"
+      ],
+      "AuthOption": "None"
+    }
+  },
   "webapi": {
     "IndividualB2C": {
       "Template": "webapi",