[5.8] Note that the GD extension is required for generating images (#29770)

* Note that the GD extension is required for generating images

* Fixed skips

Author: GrahamCampbell

composer.json

@@ -114,6 +114,7 @@
         }
     },
     "suggest": {
+        "ext-gd": "Required to use Illuminate\\Http\\Testing\\FileFactory\\image::().",
         "ext-pcntl": "Required to use all features of the queue worker.",
         "ext-posix": "Required to use all features of the queue worker.",
         "aws/aws-sdk-php": "Required to use the SQS queue driver and SES mail driver (^3.0).",

src/Illuminate/Http/composer.json

@@ -26,6 +26,9 @@
             "Illuminate\\Http\\": ""
         }
     },
+    "suggest": {
+        "ext-gd": "Required to use Illuminate\\Http\\Testing\\FileFactory\\image::()."
+    },
     "extra": {
         "branch-alias": {
             "dev-master": "5.8-dev"

tests/Http/HttpTestingFileFactoryTest.php

@@ -9,6 +9,10 @@ class HttpTestingFileFactoryTest extends TestCase
 {
     public function testImagePng()
     {
+        if (! function_exists('imagepng')) {
+            $this->markTestSkipped('The extension gd is missing from your system or was compiled without PNG support.');
+        }
+
         $image = (new FileFactory)->image('test.png', 15, 20);
 
         $info = getimagesize($image->getRealPath());
@@ -20,6 +24,10 @@ public function testImagePng()
 
     public function testImageJpeg()
     {
+        if (! function_exists('imagejpeg')) {
+            $this->markTestSkipped('The extension gd is missing from your system or was compiled without JPEG support.');
+        }
+
         $image = (new FileFactory)->image('test.jpeg', 15, 20);
 
         $info = getimagesize($image->getRealPath());