added cancellation tokens to sync deletes and added more unit tests

MongoDbGenericRepository/DataAccess/Delete/IMongoDbEraser.cs

@@ -21,7 +21,7 @@ namespace MongoDbGenericRepository.DataAccess.Delete
         /// <param name="document">The document you want to delete.</param>
         /// <param name="cancellationToken">An optional cancellation token</param>
         /// <returns>The number of documents deleted.</returns>
-        long DeleteOne<TDocument, TKey>(TDocument document, CancellationToken cancellationToken = default)
+        long DeleteOne<TDocument, TKey>(TDocument document, CancellationToken cancellationToken)
             where TDocument : IDocument<TKey>
             where TKey : IEquatable<TKey>;
 
@@ -34,7 +34,7 @@ namespace MongoDbGenericRepository.DataAccess.Delete
         /// <param name="partitionKey">An optional partition key.</param>
         /// <param name="cancellationToken">An optional cancellation token</param>
         /// <returns>The number of documents deleted.</returns>
-        long DeleteOne<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null, CancellationToken cancellationToken = default)
+        long DeleteOne<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey, CancellationToken cancellationToken)
             where TDocument : IDocument<TKey>
             where TKey : IEquatable<TKey>;
 
@@ -94,8 +94,9 @@ namespace MongoDbGenericRepository.DataAccess.Delete
         /// <typeparam name="TDocument">The type representing a Document.</typeparam>
         /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
         /// <param name="documents">The list of documents to delete.</param>
+        /// <param name="cancellationToken">The cancellation token</param>
         /// <returns>The number of documents deleted.</returns>
-        long DeleteMany<TDocument, TKey>(IEnumerable<TDocument> documents)
+        long DeleteMany<TDocument, TKey>(IEnumerable<TDocument> documents, CancellationToken cancellationToken)
             where TDocument : IDocument<TKey>
             where TKey : IEquatable<TKey>;
 
@@ -106,8 +107,9 @@ namespace MongoDbGenericRepository.DataAccess.Delete
         /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
         /// <param name="filter">A LINQ expression filter.</param>
         /// <param name="partitionKey">An optional partition key.</param>
+        /// <param name="cancellationToken">The Cancellation Token</param>
         /// <returns>The number of documents deleted.</returns>
-        long DeleteMany<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+        long DeleteMany<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey, CancellationToken cancellationToken)
             where TDocument : IDocument<TKey>
             where TKey : IEquatable<TKey>;
     }