[10.x] Throw LogicException when calling FileFactory@image() if mimetype is not supported (#46859)

* throw exception if FileFactory does not support mimetype

* style

* formatting

* rely on $functionName

---------

Co-authored-by: Taylor Otwell <[email protected]>

Author: cosmastech

src/Illuminate/Http/Testing/FileFactory.php

@@ -2,6 +2,8 @@
 
 namespace Illuminate\Http\Testing;
 
+use LogicException;
+
 class FileFactory
 {
     /**
@@ -49,6 +51,8 @@ public function createWithContent($name, $content)
      * @param  int  $width
      * @param  int  $height
      * @return \Illuminate\Http\Testing\File
+     *
+     * @throws \LogicException
      */
     public function image($name, $width = 10, $height = 10)
     {
@@ -64,9 +68,15 @@ public function image($name, $width = 10, $height = 10)
      * @param  int  $height
      * @param  string  $extension
      * @return resource
+     *
+     * @throws \LogicException
      */
     protected function generateImage($width, $height, $extension)
     {
+        if (! function_exists('imagecreatetruecolor')) {
+            throw new LogicException('GD extension is not installed.');
+        }
+
         return tap(tmpfile(), function ($temp) use ($width, $height, $extension) {
             ob_start();
 
@@ -76,7 +86,13 @@ protected function generateImage($width, $height, $extension)
 
             $image = imagecreatetruecolor($width, $height);
 
-            call_user_func("image{$extension}", $image);
+            if (! function_exists($functionName = "image{$extension}")) {
+                ob_get_clean();
+
+                throw new LogicException("{$functionName} function is not defined and image cannot be generated.");
+            }
+
+            call_user_func($functionName, $image);
 
             fwrite($temp, ob_get_clean());
         });

tests/Http/HttpTestingFileFactoryTest.php

@@ -116,6 +116,29 @@ public function testCreateWithoutMimeType()
         );
     }
 
+    /** @dataProvider generateImageDataProvider */
+    public function testCallingCreateWithoutGDLoadedThrowsAnException(string $fileExtension, string $driver)
+    {
+        if ($this->isGDSupported($driver)) {
+            $this->markTestSkipped("Requires no {$driver}");
+        }
+
+        $this->expectException(\LogicException::class);
+        (new FileFactory)->image("test.{$fileExtension}");
+    }
+
+    public static function generateImageDataProvider(): array
+    {
+        return [
+            'jpeg' => ['jpeg', 'JPEG Support'],
+            'png' => ['png', 'PNG Support'],
+            'gif' => ['gif', 'GIF Create Support'],
+            'webp' => ['webp', 'WebP Support'],
+            'wbmp' => ['wbmp', 'WBMP Support'],
+            'bmp' => ['bmp', 'BMP Support'],
+        ];
+    }
+
     /**
      * @param  string  $driver
      * @return bool