GetCollection returns a collection from the MongoDB database.

GetMockCollection is a helper function for tests.

GetMockDatabase is a helper function for tests.

InitializeMongoDB initializes the MongoDB client connection.

DefaultMongoConnectFunc is the default function for connecting to MongoDB.

GetCollectionFunc is a package-level variable holding the function to get a collection.

MongoClient holds the actual MongoDB client or a mock for testing.

MockCollection is a mock type for the mongo.Collection used for testing.

MockDatabase is a mock type for the mongo.Database used for testing.

MongoClientWrapper wraps the actual MongoDB client to conform to our interface.

CollectionInterface defines the methods to be mocked for MongoDB collection.

MongoClientInterface defines the interface for MongoDB client methods used in our code.

CollectionGetterFunc is a function type for getting a collection.

MongoConnectFuncType defines the function type for connecting to MongoDB.