Whats New

What's New

v1.0.0 — MongoDB.Driver 3.x Upgrade

BREAKING: Upgraded from MongoDB.Driver 2.30.0 to 3.8.1.

• MongoDB.Driver 3.8.1 — upgraded from 2.30.0 (major version bump)
• Removed separate MongoDB.Driver.GridFS package (now included in MongoDB.Driver 3.x)
• Added IMongoClient.BulkWrite/BulkWriteAsync stubs (client-level bulk write, throws NotSupportedException)
• Added IDisposable.Dispose() on InMemoryMongoClient (no-op, required by IMongoClient in Driver 3.x)
• LINQ2 provider no longer available (removed in Driver 3.x — LINQ3 only)
• Updated SdkVersionDriftDetector tested version range to 3.0.0–3.8.1

v0.11.60 — Bug Fixes & Parity Testing

• 26 tests converted from InMemoryOnly to real MongoDB parity
• Change stream tests rewritten with async polling for real MongoDB compatibility
• Unknown RunCommand commands now throw MongoCommandException (code 59)
• Numerous bug fixes: $rename, $push modifiers, Distinct null handling, $gt/$lt null, $getField, and more

v0.10.0 — Index Enforcement & TTL

• Unique index enforcement on all write paths (Insert, Replace, Update, FindOneAnd*)
• Compound unique indexes — multi-field uniqueness validation
• Sparse index support — documents missing indexed fields excluded from uniqueness checks
• Partial filter expression — unique constraint only applies to matching documents
• TTL index enforcement with lazy eviction on queries
• TTL array field support (uses earliest date)
• partialFilterExpression stored in index metadata and returned by ListIndexes
• Index creation validates existing documents for uniqueness violations

v0.9.0 — Fault Injection & Concurrency

• Fault injection via InMemoryMongoCollection.FaultInjector for simulating errors
• Operation logging via OperationLog for recording and asserting operations
• Concurrency safety — per-document SemaphoreSlim locking prevents lost-update race conditions
• Atomic DocumentStore.Update() function for safe concurrent modifications

v0.8.0 — Capped Collections & JavaScript

• Capped collections with MaxDocuments, MaxSize, FIFO eviction, insertion order
• Tailable cursors (CursorType.Tailable and TailableAwait)
• $jsonSchema filter with required, bsonType, numeric/string/array constraints, enum, pattern
• $where filter with pluggable evaluator
• $function expression operator with pluggable evaluator
• $accumulator group operator with pluggable evaluator
• JsTriggers package — JsExpressionSetup.Register() enables JavaScript execution via Jint

v0.7.0 — GridFS

• InMemoryGridFSBucket — Upload (bytes + stream), download (by id + by name), delete, rename, find, drop
• Chunked storage matching real GridFS file/chunk structure
• Configurable chunk size

v0.6.0 — Text Search & Geospatial

• $text filter with $search, $caseSensitive
• $geoWithin, $geoIntersects, $near, $nearSphere geospatial filters
• Full geometric calculations via NetTopologySuite

v0.5.0 — Advanced Operators

• Array filter operators: $all, $elemMatch, $size
• Bitwise operators: $bitsAllSet, $bitsAllClear, $bitsAnySet, $bitsAnyClear
• $mod operator
• Additional aggregation expression operators

v0.4.0 — Aggregation & Views

• 34 aggregation pipeline stages
• 100+ expression operators
• Database views via CreateView()
• Window functions in $setWindowFields

v0.3.0 — DI & Change Streams

• DI registration: UseInMemoryMongoDB(), UseInMemoryMongoCollections()
• Change streams (collection and client level)
• Transactions with snapshot isolation
• State persistence (Export/Import)

v0.2.0 — Core Features

• Full CRUD operations
• Filter, sort, projection, skip, limit
• Update operators ($set, $inc, $push, etc.)
• BulkWrite with ordered/unordered modes
• Index manager (metadata only)

v0.1.0 — Foundation

• InMemoryMongoClient, InMemoryMongoDatabase, InMemoryMongoCollection<T>
• Basic document storage with ConcurrentDictionary
• BsonDocument serialization/deserialization
• InMemoryMongo.Create<T>() factory

See Also

• Features — Complete feature reference
• Known Limitations — Current limitations