Add docs for testing.

README.md

@@ -14,7 +14,6 @@ It is used in [Yii Framework] but is supposed to be usable separately.
 
 [![Latest Stable Version](https://poser.pugx.org/yiisoft/active-record/v/stable.png)](https://packagist.org/packages/yiisoft/active-record)
 [![Total Downloads](https://poser.pugx.org/yiisoft/active-record/downloads.png)](https://packagist.org/packages/yiisoft/active-record)
-[![build](https://github.com/yiisoft/active-record/actions/workflows/build.yml/badge.svg?branch=dev)](https://github.com/yiisoft/active-record/actions/workflows/build.yml)
 [![codecov](https://codecov.io/gh/yiisoft/active-record/branch/master/graph/badge.svg?token=w4KarhYyEF)](https://codecov.io/gh/yiisoft/active-record)
 [![Mutation testing badge](https://img.shields.io/endpoint?style=flat&url=https%3A%2F%2Fbadge-api.stryker-mutator.io%2Fgithub.com%2Fyiisoft%2Factive-record%2Fmaster)](https://dashboard.stryker-mutator.io/reports/github.com/yiisoft/active-record/master)
 [![static analysis](https://github.com/yiisoft/active-record/actions/workflows/static.yml/badge.svg?branch=dev)](https://github.com/yiisoft/active-record/actions/workflows/static.yml)
@@ -237,29 +236,14 @@ final class Register
 }
 ```
 
-### Unit testing
+## Support
 
-The package is tested with [PHPUnit](https://phpunit.de/). To run tests:
+If you need help or have a question, the [Yii Forum](https://forum.yiiframework.com/c/yii-3-0/db/68) is a good place for that.
+You may also check out other [Yii Community Resources](https://www.yiiframework.com/community).
 
-```shell
-./vendor/bin/phpunit
-```
-
-### Mutation testing
-
-The package tests are checked with [Infection](https://infection.github.io/) mutation framework. To run it:
-
-```shell
-./vendor/bin/infection
-```
-
-### Static analysis
+## Testing
 
-The code is statically analyzed with [Psalm](https://psalm.dev/). To run static analysis:
-
-```shell
-./vendor/bin/psalm
-```
+[Check the testing instructions](/docs/en/testing.md) to learn about testing.
 
 ### Support the project
 

docs/en/testing.md

@@ -0,0 +1,92 @@
+# Testing
+
+This package can be tested globally or individually for each DBMS.
+
+- [MSSQL](https://github.com/yiisoft/db-mssql)
+- [MySQL/MariaDB](https://github.com/yiisoft/db-mysql)
+- [Oracle](https://github.com/yiisoft/db-oracle)
+- [PostgreSQL](https://github.com/yiisoft/db-pgsql)
+- [SQLite](https://github.com/yiisoft/db-sqlite)
+
+## Github actions
+
+All our packages have github actions by default, so you can test your [contribution](https://github.com/yiisoft/db/blob/master/.github/CONTRIBUTING.md) in the cloud.
+
+> Note: We recommend pull requesting in draft mode until all tests pass.
+
+## Docker images
+
+For greater ease it is recommended to use Docker containers for each DBMS, for this you can use the [docker-compose.yml](https://docs.docker.com/compose/compose-file/) file that in the root directory of each package.
+
+- [MSSQL 2022](https://github.com/yiisoft/db-mssql/blob/master/docker-compose.yml)
+- [MySQL 8](https://github.com/yiisoft/db-mysql/blob/master/docker-compose.yml)
+- [MariaDB 10.11](https://github.com/yiisoft/db-mysql/blob/master/docker-compose-mariadb.yml)
+- [Oracle 21](https://github.com/yiisoft/db-oracle/blob/master/docker-compose.yml)
+- [PostgreSQL 15](https://github.com/yiisoft/db-pgsql/blob/master/docker-compose.yml)
+
+For running the Docker containers you can use the following command:
+
+```shell
+docker compose up -d
+```
+
+## Unit testing
+
+The package is tested with [PHPUnit](https://phpunit.de/).
+
+### Global testing
+
+The following steps are required to run the tests.
+
+1. Run all Docker containers for each dbms.
+2. Install the dependencies of the project with composer.
+3. Run the tests.
+
+```shell
+vendor/bin/phpunit
+```
+
+### Individual testing
+
+The following steps are required to run the tests.
+
+1. Run the Docker container for the dbms you want to test.
+2. Install the dependencies of the project with composer.
+3. Run the tests.
+
+```shell
+vendor/bin/phpunit --testsuite=Pgsql
+```
+
+Suites available:
+- Mssql
+- Mysql
+- Oracle
+- Pgsql
+- Sqlite
+
+## Static analysis
+
+The code is statically analyzed with [Psalm](https://psalm.dev/). To run static analysis:
+
+```shell
+./vendor/bin/psalm
+```
+
+## Rector
+
+Use [Rector](https://github.com/rectorphp/rector) to make codebase follow some specific rules or use either newest or any specific version of PHP: 
+
+```shell
+./vendor/bin/rector
+```
+
+## Composer require checker
+
+This package uses [composer-require-checker](https://github.com/maglnet/ComposerRequireChecker) to check if all dependencies are correctly defined in `composer.json`.
+
+To run the checker, execute the following command:
+
+```shell
+./vendor/bin/composer-require-checker
+```