update README and CHANGELOG

CHANGELOG.md

@@ -13,3 +13,12 @@ All notable changes to this project will be documented in this file.
 - Unit of Work (opt‑in): identity map; deferred updates/deletes; relation‑aware delete cascades; optimistic locking; snapshot diffing (flagged); identity map controls; coalescing.
 - Event system: DAO and UoW events; listeners/subscribers.
 - CI: GitHub Actions matrix (PHP 8.1–8.3) with MySQL + Mongo services; guarded tests.
+
+#### 0.1.0 — 2025-12-11
+
+- Dependencies: upgrade `mongodb/mongodb` to `^2.0` (tested at 2.1.x). Requires `ext-mongodb >= 2.1`.
+- Tests: migrate to PHPUnit 10; update `phpunit.xml.dist` and test cases accordingly.
+- MongoDB tests: marked as `@group mongo-integration` and skipped by default via `phpunit.xml.dist` group exclusion. Each test pings the server and skips when not available.
+- SQL tests: stabilized MySQL `belongsToMany` eager and join-eager tests by aligning anonymous DAO constructors with runtime patterns and adding needed projections.
+- PostgreSQL: fix identifier quoting by using double quotes in `PostgresGrammar` (no more backticks in generated DDL). `PostgresSmokeTest` passes when a Postgres instance is available.
+- SQLite: portable DDL in schema tests; minor assertion cleanups for accessors/casters.

README.md

@@ -24,6 +24,38 @@ composer require getphred/pairity
 
 After install, you can use the CLI at `vendor/bin/pairity`.
 
+## Testing
+
+This project uses PHPUnit 10. The default test suite excludes MongoDB integration tests by default for portability.
+
+- Install dev dependencies:
+
+```
+composer install
+```
+
+- Run the default suite (SQLite + unit tests; Mongo tests excluded by default):
+
+```
+vendor/bin/phpunit
+```
+
+- Run MongoDB integration tests (requires `ext-mongodb >= 2.1` and a reachable server):
+  - Provide connection via environment variables and include the group:
+
+```
+MONGO_HOST=127.0.0.1 MONGO_PORT=27017 \
+vendor/bin/phpunit --group mongo-integration
+```
+
+Notes:
+- When Mongo is unavailable or the extension is missing, Mongo tests will self‑skip.
+- PostgreSQL smoke test requires environment variables (skips if missing):
+  - `POSTGRES_HOST` (required to enable), optional `POSTGRES_PORT`, `POSTGRES_DB`, `POSTGRES_USER`, `POSTGRES_PASS`.
+  - PostgreSQL identifiers are generated with double quotes by the schema grammar.
+- MySQL tests require:
+  - `MYSQL_HOST` (required to enable), optional `MYSQL_PORT`, `MYSQL_DB`, `MYSQL_USER`, `MYSQL_PASS`.
+
 ## Quick start
 
 Minimal example with SQLite (file db.sqlite) and a simple `users` DAO/DTO.