add: simple DI container with test

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

composer.json

@@ -17,7 +17,7 @@
  },
  "autoload-dev": {
  "psr-4": {
- "Tests\\": "tests/"
+ "Tests\\Twent\\Framework\\": "tests/"
  }
  },
  "require": {

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;
+}

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();
+ }
+}

tests/Feature/DI/Foo.php

@@ -0,0 +1,9 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tests\Twent\Framework\Feature\DI;
+
+final class Foo
+{
+}

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);
+ }
+}