Add depth property to ICoreScope (#12540)

tests/Umbraco.Tests.UnitTests/Umbraco.Infrastructure/Scoping/ScopeUnitTests.cs

@@ -579,5 +579,34 @@ namespace Umbraco.Cms.Tests.UnitTests.Umbraco.Infrastructure.Scoping
                 Assert.IsNull(realScope.GetReadLocks());
             }
         }
+
+        [Test]
+        public void Depth_WhenRootScope_ReturnsZero()
+        {
+            var scopeProvider = GetScopeProvider(out var syntaxProviderMock);
+
+            using (var scope = scopeProvider.CreateScope())
+            {
+                Assert.AreEqual(0,scope.Depth);
+            }
+        }
+
+
+        [Test]
+        public void Depth_WhenChildScope_ReturnsDepth()
+        {
+            var scopeProvider = GetScopeProvider(out var syntaxProviderMock);
+
+            using (scopeProvider.CreateScope())
+            {
+                using (scopeProvider.CreateScope())
+                {
+                    using (var c2 = scopeProvider.CreateScope())
+                    {
+                        Assert.AreEqual(2, c2.Depth);
+                    }
+                }
+            }
+        }
     }
 }