add not equal timestamp assert

Author: SimonCropp

readme.md

@@ -330,7 +330,7 @@ var application = webApplicationBuilder.Build();
 application.UseDelta(
     getConnection: httpContext => httpContext.RequestServices.GetRequiredService<SqlConnection>());
 ```
-<sup><a href='/src/DeltaTests/Usage.cs#L219-L225' title='Snippet source file'>snippet source</a> | <a href='#snippet-CustomDiscoveryConnection' title='Start of snippet'>anchor</a></sup>
+<sup><a href='/src/DeltaTests/Usage.cs#L220-L226' title='Snippet source file'>snippet source</a> | <a href='#snippet-CustomDiscoveryConnection' title='Start of snippet'>anchor</a></sup>
 <!-- endSnippet -->
 
 To use custom connection and transaction discovery:
@@ -348,7 +348,7 @@ webApplication.UseDelta(
         return new(sqlConnection, sqlTransaction);
     });
 ```
-<sup><a href='/src/DeltaTests/Usage.cs#L230-L242' title='Snippet source file'>snippet source</a> | <a href='#snippet-CustomDiscoveryConnectionAndTransaction' title='Start of snippet'>anchor</a></sup>
+<sup><a href='/src/DeltaTests/Usage.cs#L231-L243' title='Snippet source file'>snippet source</a> | <a href='#snippet-CustomDiscoveryConnectionAndTransaction' title='Start of snippet'>anchor</a></sup>
 <!-- endSnippet -->
 
 
@@ -563,7 +563,7 @@ foreach (var db in trackedDatabases)
     Trace.WriteLine(db);
 }
 ```
-<sup><a href='/src/DeltaTests/Usage.cs#L117-L125' title='Snippet source file'>snippet source</a> | <a href='#snippet-GetDatabasesWithTracking' title='Start of snippet'>anchor</a></sup>
+<sup><a href='/src/DeltaTests/Usage.cs#L118-L126' title='Snippet source file'>snippet source</a> | <a href='#snippet-GetDatabasesWithTracking' title='Start of snippet'>anchor</a></sup>
 <!-- endSnippet -->
 
 Uses the following SQL:
@@ -593,7 +593,7 @@ foreach (var db in trackedTables)
     Trace.WriteLine(db);
 }
 ```
-<sup><a href='/src/DeltaTests/Usage.cs#L143-L151' title='Snippet source file'>snippet source</a> | <a href='#snippet-GetTrackedTables' title='Start of snippet'>anchor</a></sup>
+<sup><a href='/src/DeltaTests/Usage.cs#L144-L152' title='Snippet source file'>snippet source</a> | <a href='#snippet-GetTrackedTables' title='Start of snippet'>anchor</a></sup>
 <!-- endSnippet -->
 
 Uses the following SQL:
@@ -618,7 +618,7 @@ Determine if change tracking is enabled for a database.
 ```cs
 var isTrackingEnabled = await sqlConnection.IsTrackingEnabled();
 ```
-<sup><a href='/src/DeltaTests/Usage.cs#L208-L212' title='Snippet source file'>snippet source</a> | <a href='#snippet-IsTrackingEnabled' title='Start of snippet'>anchor</a></sup>
+<sup><a href='/src/DeltaTests/Usage.cs#L209-L213' title='Snippet source file'>snippet source</a> | <a href='#snippet-IsTrackingEnabled' title='Start of snippet'>anchor</a></sup>
 <!-- endSnippet -->
 
 Uses the following SQL:
@@ -645,7 +645,7 @@ Enable change tracking for a database.
 ```cs
 await sqlConnection.EnableTracking();
 ```
-<sup><a href='/src/DeltaTests/Usage.cs#L202-L206' title='Snippet source file'>snippet source</a> | <a href='#snippet-EnableTracking' title='Start of snippet'>anchor</a></sup>
+<sup><a href='/src/DeltaTests/Usage.cs#L203-L207' title='Snippet source file'>snippet source</a> | <a href='#snippet-EnableTracking' title='Start of snippet'>anchor</a></sup>
 <!-- endSnippet -->
 
 Uses the following SQL:
@@ -673,7 +673,7 @@ Disable change tracking for a database and all tables within that database.
 ```cs
 await sqlConnection.DisableTracking();
 ```
-<sup><a href='/src/DeltaTests/Usage.cs#L187-L191' title='Snippet source file'>snippet source</a> | <a href='#snippet-DisableTracking' title='Start of snippet'>anchor</a></sup>
+<sup><a href='/src/DeltaTests/Usage.cs#L188-L192' title='Snippet source file'>snippet source</a> | <a href='#snippet-DisableTracking' title='Start of snippet'>anchor</a></sup>
 <!-- endSnippet -->
 
 Uses the following SQL:
@@ -710,7 +710,7 @@ Enables change tracking for all tables listed, and disables change tracking for
 ```cs
 await sqlConnection.SetTrackedTables(["Companies"]);
 ```
-<sup><a href='/src/DeltaTests/Usage.cs#L137-L141' title='Snippet source file'>snippet source</a> | <a href='#snippet-SetTrackedTables' title='Start of snippet'>anchor</a></sup>
+<sup><a href='/src/DeltaTests/Usage.cs#L138-L142' title='Snippet source file'>snippet source</a> | <a href='#snippet-SetTrackedTables' title='Start of snippet'>anchor</a></sup>
 <!-- endSnippet -->
 
 Uses the following SQL:

src/DeltaTests/Usage.cs

@@ -105,6 +105,7 @@ insert into [Companies] (Id, Content)
         var newTimeStamp = await DeltaExtensions.GetLastTimeStamp(connection, null);
         IsNotEmpty(newTimeStamp);
         IsNotNull(newTimeStamp);
+        AreNotEqual(timeStamp, newTimeStamp);
     }
 
     [Test]