added cancellation tokens to sync deletes and added more unit tests

MongoDbGenericRepository/IBaseMongoRepository.Delete.cs

@@ -236,6 +236,42 @@ namespace MongoDbGenericRepository
             where TDocument : IDocument<TKey>
             where TKey : IEquatable<TKey>;
 
+        /// <summary>
+        ///     Deletes a list of documents.
+        /// </summary>
+        /// <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, CancellationToken cancellationToken)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        ///     Deletes the documents matching the condition of the LINQ expression filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <returns>The number of documents deleted.</returns>
+        long DeleteMany<TDocument, TKey>(Expression<Func<TDocument, bool>> filter)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        ///     Deletes the documents matching the condition of the LINQ expression filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>The number of documents deleted.</returns>
+        long DeleteMany<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, CancellationToken cancellationToken)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+
         /// <summary>
         ///     Deletes the documents matching the condition of the LINQ expression filter.
         /// </summary>
@@ -244,8 +280,22 @@ namespace MongoDbGenericRepository
         /// <param name="filter">A LINQ expression filter.</param>
         /// <param name="partitionKey">An optional partition key.</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)
             where TDocument : IDocument<TKey>
             where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        ///     Deletes the documents matching the condition of the LINQ expression filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <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, CancellationToken cancellationToken)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
     }
 }