Add publish test for an app with a dependency with contents.

test/dotnet-publish.Tests/PublishAppWithDependencies.cs

@@ -0,0 +1,51 @@
+// 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 System.IO;
+using Microsoft.DotNet.TestFramework;
+using Microsoft.DotNet.Tools.Test.Utilities;
+using Xunit;
+
+namespace Microsoft.DotNet.Tools.Publish.Tests
+{
+    public class PublishAppWithDependencies : TestBase
+    {
+        [Fact]
+        public void PublishTestAppWithContentPackage()
+        {
+            var testInstance = TestAssetsManager.CreateTestInstance("TestAppWithContentPackage")
+                .WithLockFiles();
+
+            var publishDir = Publish(testInstance);
+
+            publishDir.Should().HaveFiles(new[]
+            {
+                "TestAppWithContentPackage.exe",
+                "TestAppWithContentPackage.dll",
+                "TestAppWithContentPackage.deps.json"
+            });
+
+            // these files come from the contentFiles of the SharedContentA dependency
+            publishDir
+                .Sub("scripts")
+                .Should()
+                .Exist()
+                .And
+                .HaveFile("run.cmd");
+
+            publishDir
+                .Should()
+                .HaveFile("config.xml");
+        }
+
+        private DirectoryInfo Publish(TestInstance testInstance)
+        {
+            var publishCommand = new PublishCommand(testInstance.TestRoot);
+            var publishResult = publishCommand.Execute();
+
+            publishResult.Should().Pass();
+
+            return publishCommand.GetOutputDirectory(portable: false);
+        }
+    }
+}