Move test projects from src/ to tests/ (#11357)

* Update gitignore

* Move csproj

* Update project references

* Update solutions

* Update build scripts

* Tests used to share editorconfig with projects in src

* Fix broken tests.

* Stop copying around .editorconfig

merged root one with linting

* csharp_style_expression_bodied -> suggestion

* Move StyleCop rulesets to matching directories and update shared build properties

* Remove legacy build files, update NuGet.cofig and solution files

* Restore myget source

* Clean up .gitignore

* Update .gitignore

* Move new test classes to tests after merge

* Gitignore + nuget config

* Move new test

Co-authored-by: Ronald Barendse <ronald@barend.se>

tests/Umbraco.Tests.UnitTests/Umbraco.Core/ReflectionTests.cs

@@ -0,0 +1,39 @@
+// Copyright (c) Umbraco.
+// See LICENSE for more details.
+
+using System;
+using System.Linq;
+using NUnit.Framework;
+using Umbraco.Extensions;
+
+namespace Umbraco.Cms.Tests.UnitTests.Umbraco.Core
+{
+    [TestFixture]
+    public class ReflectionTests
+    {
+        [Test]
+        public void GetBaseTypesIsOk()
+        {
+            // tests that the GetBaseTypes extension method works.
+            Type type = typeof(Class2);
+            Type[] types = type.GetBaseTypes(true).ToArray();
+            Assert.AreEqual(3, types.Length);
+            Assert.Contains(typeof(Class2), types);
+            Assert.Contains(typeof(Class1), types);
+            Assert.Contains(typeof(object), types);
+
+            types = type.GetBaseTypes(false).ToArray();
+            Assert.AreEqual(2, types.Length);
+            Assert.Contains(typeof(Class1), types);
+            Assert.Contains(typeof(object), types);
+        }
+
+        private class Class1
+        {
+        }
+
+        private class Class2 : Class1
+        {
+        }
+    }
+}