[8.x] Adding tests to ValidatePostSize (#38332)

* Update ResourceTest.php

* Update ResourceTest.php

* Update ResourceTest.php

* Revert "Update ResourceTest.php"

This reverts commit 8b6bace.

* Update ResourceTest.php

* Update ResourceTest.php

Author: komen205

tests/Integration/Http/ResourceTest.php

@@ -2,6 +2,8 @@
 
 namespace Illuminate\Tests\Integration\Http;
 
+use Illuminate\Foundation\Http\Middleware\ValidatePostSize;
+use Illuminate\Http\Exceptions\PostTooLargeException;
 use Illuminate\Http\Resources\ConditionallyLoadsAttributes;
 use Illuminate\Http\Resources\Json\JsonResource;
 use Illuminate\Http\Resources\MergeValue;
@@ -29,6 +31,7 @@
 use Illuminate\Tests\Integration\Http\Fixtures\ResourceWithPreservedKeys;
 use Illuminate\Tests\Integration\Http\Fixtures\SerializablePostResource;
 use Illuminate\Tests\Integration\Http\Fixtures\Subscription;
+use Mockery;
 use Orchestra\Testbench\TestCase;
 
 /**
@@ -989,6 +992,16 @@ public function work()
         ], $results);
     }
 
+    public function testPostTooLargeException()
+    {
+        $this->expectException(PostTooLargeException::class);
+
+        $request = Mockery::mock(Request::class, ['server' => ['CONTENT_LENGTH' => '2147483640']]);
+        $post = new ValidatePostSize;
+        $post->handle($request, function () {
+        });
+    }
+
     public function testLeadingMergeKeyedValueIsMergedCorrectlyWhenFirstValueIsMissing()
     {
         $filter = new class