More viewengine migration. Including wrapping in profiler etcs

Signed-off-by: Bjarke Berg <mail@bergmania.dk>

src/Umbraco.Tests.UnitTests/Umbraco.Web.Website/ViewEngines/ProfilingViewEngineWrapperMvcViewOptionsSetupTests.cs

@@ -0,0 +1,75 @@
+using Microsoft.AspNetCore.Mvc;
+using Moq;
+using NUnit.Framework;
+using Umbraco.Core.Logging;
+using Umbraco.Web.Website.ViewEngines;
+
+namespace Umbraco.Tests.Runtimes
+{
+    [TestFixture]
+    public class ProfilingViewEngineWrapperMvcViewOptionsSetupTests
+    {
+        private ProfilingViewEngineWrapperMvcViewOptionsSetup Sut =>
+            new ProfilingViewEngineWrapperMvcViewOptionsSetup(Mock.Of<IProfiler>());
+        [Test]
+        public void WrapViewEngines_HasEngines_WrapsAll()
+        {
+            var options = new MvcViewOptions()
+            {
+                ViewEngines =
+                {
+                    Mock.Of<IRenderViewEngine>(),
+                    Mock.Of<IPluginViewEngine>(),
+                }
+            };
+
+            Sut.Configure(options);
+
+            Assert.That(options.ViewEngines.Count, Is.EqualTo(2));
+            Assert.That(options.ViewEngines[0], Is.InstanceOf<ProfilingViewEngine>());
+            Assert.That(options.ViewEngines[1], Is.InstanceOf<ProfilingViewEngine>());
+        }
+
+        [Test]
+        public void WrapViewEngines_HasEngines_KeepsSortOrder()
+        {
+            var options = new MvcViewOptions()
+            {
+                ViewEngines =
+                {
+                    Mock.Of<IRenderViewEngine>(),
+                    Mock.Of<IPluginViewEngine>(),
+                }
+            };
+
+            Sut.Configure(options);
+
+            Assert.That(options.ViewEngines.Count, Is.EqualTo(2));
+            Assert.That(((ProfilingViewEngine)options.ViewEngines[0]).Inner, Is.InstanceOf<IRenderViewEngine>());
+            Assert.That(((ProfilingViewEngine)options.ViewEngines[1]).Inner, Is.InstanceOf<IPluginViewEngine>());
+        }
+
+        [Test]
+        public void WrapViewEngines_HasProfiledEngine_AddsSameInstance()
+        {
+            var profiledEngine = new ProfilingViewEngine(Mock.Of<IPluginViewEngine>(), Mock.Of<IProfiler>());
+            var options = new MvcViewOptions()
+            {
+                ViewEngines =
+                {
+                    profiledEngine
+                }
+            };
+
+            Sut.Configure(options);
+
+            Assert.That(options.ViewEngines[0], Is.SameAs(profiledEngine));
+        }
+
+        [Test]
+        public void WrapViewEngines_CollectionIsNull_DoesNotThrow()
+        {
+            Assert.DoesNotThrow(() => Sut.Configure(new MvcViewOptions()));
+        }
+    }
+}