creating configuration and type casting

tests/Casting/MapperTypeTest.php

@@ -0,0 +1,44 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Casting;
+
+use App\Casting\Type\IntegerType;
+use App\Casting\Type\StringType;
+use PHPUnit\Framework\Attributes\CoversClass;
+use PHPUnit\Framework\TestCase;
+
+#[CoversClass(MapperType::class)]
+final class MapperTypeTest extends TestCase
+{
+    public function testGetStringType(): void
+    {
+        $type = (new MapperType(MapperType::STRING))->create('value');
+
+        self::assertInstanceOf(
+            $type,
+            StringType::class,
+        );
+    }
+
+    public function testGetIntegerType(): void
+    {
+        $type = (new MapperType(MapperType::INTEGER))->create(1);
+
+        self::assertInstanceOf(
+            $type,
+            IntegerType::class,
+        );
+    }
+
+    public function testGetIntType(): void
+    {
+        $type = (new MapperType(MapperType::INT))->create(1);
+
+        self::assertInstanceOf(
+            $type,
+            IntegerType::class,
+        );
+    }
+}