From 93df0a9be406151e7e1818ad3ce1c6cb3c8aad32 Mon Sep 17 00:00:00 2001
From: twent <twentprod@gmail.com>
Date: Tue, 11 Jul 2023 20:31:45 +0300
Subject: [PATCH] add: simple DI container with test

---
 Makefile                                  |  5 +++-
 composer.json                             |  2 +-
 core/DI/Contracts/Container.php           | 17 +++++++++++++
 core/DI/GenericContainer.php              | 29 +++++++++++++++++++++++
 tests/Feature/DI/Foo.php                  |  9 +++++++
 tests/Feature/DI/GenericContainerTest.php | 22 +++++++++++++++++
 6 files changed, 82 insertions(+), 2 deletions(-)
 create mode 100644 core/DI/Contracts/Container.php
 create mode 100644 core/DI/GenericContainer.php
 create mode 100644 tests/Feature/DI/Foo.php
 create mode 100644 tests/Feature/DI/GenericContainerTest.php

diff --git a/Makefile b/Makefile
index a76b6f7..7405677 100644
--- a/Makefile
+++ b/Makefile
@@ -5,7 +5,10 @@ install:
 	composer install --ignore-platform-reqs
 
 format:
-	vendor/bin/phpcs && vendor/bin/phpcbf
+	vendor/bin/phpcs
+
+format-fix:
+	vendor/bin/phpcbf
 
 analyse:
 	vendor/bin/phpinsights analyse -n
diff --git a/composer.json b/composer.json
index a072d8b..c2a40e0 100644
--- a/composer.json
+++ b/composer.json
@@ -17,7 +17,7 @@
     },
     "autoload-dev": {
         "psr-4": {
-            "Tests\\": "tests/"
+            "Tests\\Twent\\Framework\\": "tests/"
         }
     },
     "require": {
diff --git a/core/DI/Contracts/Container.php b/core/DI/Contracts/Container.php
new file mode 100644
index 0000000..32909ad
--- /dev/null
+++ b/core/DI/Contracts/Container.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Twent\Framework\DI\Contracts;
+
+interface Container
+{
+    public function register(string $className, callable $definition): self;
+
+    /**
+     * @template TClassName
+     * @param class-string<TClassName> $className
+     * @return TClassName
+     */
+    public function get(string $className): object;
+}
diff --git a/core/DI/GenericContainer.php b/core/DI/GenericContainer.php
new file mode 100644
index 0000000..656688a
--- /dev/null
+++ b/core/DI/GenericContainer.php
@@ -0,0 +1,29 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Twent\Framework\DI;
+
+use Twent\Framework\DI\Contracts\Container;
+
+final class GenericContainer implements Container
+{
+    private array $definitions = [];
+
+    public function register(string $className, callable $definition): Container
+    {
+        $this->definitions[$className] = $definition;
+
+        return $this;
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function get(string $className): object
+    {
+        $definition = $this->definitions[$className];
+
+        return $definition();
+    }
+}
diff --git a/tests/Feature/DI/Foo.php b/tests/Feature/DI/Foo.php
new file mode 100644
index 0000000..921ebe3
--- /dev/null
+++ b/tests/Feature/DI/Foo.php
@@ -0,0 +1,9 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tests\Twent\Framework\Feature\DI;
+
+final class Foo
+{
+}
diff --git a/tests/Feature/DI/GenericContainerTest.php b/tests/Feature/DI/GenericContainerTest.php
new file mode 100644
index 0000000..3b8181b
--- /dev/null
+++ b/tests/Feature/DI/GenericContainerTest.php
@@ -0,0 +1,22 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tests\Twent\Framework\Feature\DI;
+
+use PHPUnit\Framework\TestCase;
+use Twent\Framework\DI\GenericContainer;
+
+final class GenericContainerTest extends TestCase
+{
+    public function testContainer(): void
+    {
+        $container = new GenericContainer();
+
+        $container->register(Foo::class, static fn() => new Foo());
+
+        $foo = $container->get(Foo::class);
+
+        $this->assertInstanceOf(Foo::class, $foo);
+    }
+}