Restructure test folders & refactor test traits

tests/GdTestCase.php

@@ -0,0 +1,53 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Intervention\Image\Tests;
+
+use Intervention\Image\Drivers\Gd\Core;
+use Intervention\Image\Drivers\Gd\Decoders\FilePathImageDecoder;
+use Intervention\Image\Drivers\Gd\Driver;
+use Intervention\Image\Drivers\Gd\Frame;
+use Intervention\Image\Image;
+
+abstract class GdTestCase extends BaseTestCase
+{
+    public function readTestImage($filename = 'test.jpg'): Image
+    {
+        return (new FilePathImageDecoder())->handle(
+            $this->getTestImagePath($filename)
+        );
+    }
+
+    public function createTestImage(int $width, int $height): Image
+    {
+        $gd = imagecreatetruecolor($width, $height);
+        imagefill($gd, 0, 0, imagecolorallocate($gd, 255, 0, 0));
+
+        return new Image(
+            new Driver(),
+            new Core([
+                new Frame($gd)
+            ])
+        );
+    }
+
+    public function createTestAnimation(): Image
+    {
+        $gd1 = imagecreatetruecolor(3, 2);
+        imagefill($gd1, 0, 0, imagecolorallocate($gd1, 255, 0, 0));
+        $gd2 = imagecreatetruecolor(3, 2);
+        imagefill($gd2, 0, 0, imagecolorallocate($gd1, 0, 255, 0));
+        $gd3 = imagecreatetruecolor(3, 2);
+        imagefill($gd3, 0, 0, imagecolorallocate($gd1, 0, 0, 255));
+
+        return new Image(
+            new Driver(),
+            new Core([
+                new Frame($gd1),
+                new Frame($gd2),
+                new Frame($gd3),
+            ])
+        );
+    }
+}