deleteMany doesn' work

[LucVidal360]

Problem

It seems deleteMany never deletes anything. Indeed, it's algorithm is:

• fetch all documents matching the query with a cursor
• extract their ids
• remove the documents in the collection with these ids.

Unfortunately

• the ids are compared using lodash.includes which uses SameValueZero: https://github.com/williamkapke/mongo-mock/blob/80fdc61faee03e0668b89eca454c73a9efd864ee/lib/collection.js#L132
• but the cursor returns cloned documents: https://github.com/williamkapke/mongo-mock/blob/80fdc61faee03e0668b89eca454c73a9efd864ee/lib/cursor.js#L52
  • with cloned ObjectIds: https://github.com/williamkapke/mongo-mock/blob/80fdc61faee03e0668b89eca454c73a9efd864ee/lib/cursor.js#L256-L258

This means ids never match (because they are not the same instance of ObjectIds), and nothing is ever deleted.

Possible fix

A solution could be to add a secret option to cursor to avoid cloning documents. To use only with deleteMany.