updated tests

MongoDB.Entities/MongoDB.Entities.csproj

@@ -15,7 +15,7 @@
     <PackageReleaseNotes>- [breaking] remove MongoDB.Entities.Core namespace
 - [breaking] make ModifiedOn property opt-in using IModifiedOn interface
 - [breaking] remove support for geo haystack indexes as deprecated in official driver
-- new interface ICreatedOn for optionally adding creation date to entities
+- new interface ICreatedOn for optionally adding auto-managed creation date to entities
 - misc. changes</PackageReleaseNotes>
     <PackageId>MongoDB.Entities</PackageId>
     <Product>MongoDB.Entities</Product>

Tests/Models/Author.cs

@@ -3,7 +3,7 @@
 namespace MongoDB.Entities.Tests
 {
     [Name("Writer")]
-    public class Author : Entity, IModifiedOn
+    public class Author : Entity, IModifiedOn, ICreatedOn
     {
         public string Name { get; set; }
         public string Surname { get; set; }
@@ -30,6 +30,8 @@ public class Author : Entity, IModifiedOn
         public string BookIDs { get; set; }
 
         public DateTime ModifiedOn { get; set; }
+
+        public DateTime CreatedOn { get; set; }
 
         public Author() => this.InitOneToMany(() => Books);
     }

Tests/TestSaving.cs

@@ -29,6 +29,22 @@ public void saved_book_has_correct_title()
             Assert.AreEqual("Test", title);
         }
 
+        [TestMethod]
+        public void created_on_property_works()
+        {
+            var author = new Author { Name = "test" };
+            author.Save();
+
+            var res = DB.Find<Author, DateTime>()
+                        .Match(a => a.ID == author.ID)
+                        .Project(a => a.CreatedOn)
+                        .Execute()
+                        .Single();
+
+            Assert.AreEqual(res.ToLongTimeString(), author.CreatedOn.ToLongTimeString());
+            Assert.IsTrue(DateTime.UtcNow.Subtract(res).TotalSeconds <= 5);
+        }
+
         [TestMethod]
         public void save_preserving()
         {