Added tests for automatic casting of nullable nested array DTOs

tests/NestedArrayDataTransferObjectTest.php

@@ -0,0 +1,50 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Spatie\DataTransferObject\Tests;
+
+use Spatie\DataTransferObject\DataTransferObject;
+
+class NestedArrayDataTransferObjectTest extends TestCase
+{
+    /** @test */
+    public function it_can_validate_nested_arrays()
+    {
+        $a = new WrapperDtoPropertyType([
+            'arr' => [
+                ['name' => 'test',],
+                ['name' => 'test2',]
+            ],
+        ]);
+
+        $this->assertEquals('test', $a->arr[0]->name);
+        $this->assertEquals('test2', $a->arr[1]->name);
+        $this->assertEquals(
+            NestedArrayDtoPropertyType::class,
+            get_class($a->arr[0])
+        );
+    }
+
+    /** @test */
+    public function it_can_handle_empty_arrays()
+    {
+        $a = new WrapperDtoPropertyType([
+            'arr' => [],
+        ]);
+
+        $this->assertIsArray($a->arr);
+        $this->assertEmpty($a->arr);
+    }
+}
+
+class WrapperDtoPropertyType extends DataTransferObject
+{
+    /** @var \Spatie\DataTransferObject\Tests\NestedArrayDtoPropertyType[] */
+    public array $arr;
+}
+
+class NestedArrayDtoPropertyType extends DataTransferObject
+{
+    public string $name;
+}

tests/NestedNullableArrayDataTransferObjectTest.php

@@ -0,0 +1,51 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Spatie\DataTransferObject\Tests;
+
+use Spatie\DataTransferObject\DataTransferObject;
+
+class NestedNullableArrayDataTransferObjectTest extends TestCase
+{
+    /** @test */
+    public function it_can_validate_nested_arrays()
+    {
+        $a = new WrapperWithNullableArrayDtoPropertyType([
+            'arr' => [
+                ['name' => 'test',],
+                ['name' => 'test2',]
+            ],
+        ]);
+
+        $this->assertEquals('test', $a->arr[0]->name);
+        $this->assertEquals('test2', $a->arr[1]->name);
+    }
+
+    /** @test */
+    public function it_can_handle_empty_arrays()
+    {
+        $a = new WrapperWithNullableArrayDtoPropertyType([
+            'arr' => [],
+        ]);
+
+        $this->assertIsArray($a->arr);
+        $this->assertEmpty($a->arr);
+    }
+
+    /** @test */
+    public function it_fails_on_null()
+    {
+        $a = new WrapperWithNullableArrayDtoPropertyType([
+            'arr' => null,
+        ]);
+
+        $this->assertNull($a->arr);
+    }
+}
+
+class WrapperWithNullableArrayDtoPropertyType extends DataTransferObject
+{
+    /** @var \Spatie\DataTransferObject\Tests\NestedArrayDtoPropertyType[]|null */
+    public ?array $arr;
+}

tests/NestedNullableArrayFlexibleDataTransferObjectTest.php

@@ -0,0 +1,60 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Spatie\DataTransferObject\Tests;
+
+use Spatie\DataTransferObject\DataTransferObject;
+use Spatie\DataTransferObject\FlexibleDataTransferObject;
+
+class NestedNullableArrayFlexibleDataTransferObjectTest extends TestCase
+{
+    /** @test */
+    public function it_can_validate_nested_arrays()
+    {
+        $a = new FlexibleWrapperWithNullableArrayDtoPropertyType([
+            'arr' => [
+                ['name' => 'test',],
+                ['name' => 'test2',]
+            ],
+        ]);
+
+        $this->assertEquals('test', $a->arr[0]->name);
+        $this->assertEquals('test2', $a->arr[1]->name);
+    }
+
+    /** @test */
+    public function it_can_handle_empty_arrays()
+    {
+        $a = new FlexibleWrapperWithNullableArrayDtoPropertyType([
+            'arr' => [],
+        ]);
+
+        $this->assertIsArray($a->arr);
+        $this->assertEmpty($a->arr);
+    }
+
+    /** @test */
+    public function it_fails_on_null()
+    {
+        $a = new FlexibleWrapperWithNullableArrayDtoPropertyType([
+            'arr' => null,
+        ]);
+
+        $this->assertNull($a->arr);
+    }
+
+    /** @test */
+    public function it_fails_on_missing()
+    {
+        $a = new FlexibleWrapperWithNullableArrayDtoPropertyType([]);
+
+        $this->assertNull($a->arr);
+    }
+}
+
+class FlexibleWrapperWithNullableArrayDtoPropertyType extends FlexibleDataTransferObject
+{
+    /** @var \Spatie\DataTransferObject\Tests\NestedArrayDtoPropertyType[]|null */
+    public ?array $arr;
+}