add debug code to see why test fails

Author: JulianAtkins

tests/system/Images/ImageMagickHandlerTest.php

@@ -436,7 +436,22 @@ public function testImageConvertPngToAvif(): void
     {
         $this->handler->withFile($this->origin . 'ci-logo.png');
         $this->handler->convert(IMAGETYPE_AVIF);
-        $this->handler->save($this->root . 'ci-logo.avif');
+        $rc = $this->handler->save($this->root . 'ci-logo.avif');
+
+echo "\n\n";
+var_dump($rc);
+var_dump($this->root);
+var_dump($this->root . 'ci-logo.avif');
+if(is_file($this->root . 'ci-logo.avif') {
+	echo "filesize: " . filesize($this->root . 'ci-logo.avif') . "\n";
+} else {
+	echo "is_file fail\n";
+}
+var_dump(exif_imagetype($this->root . 'ci-logo.avif'));
+var_dump( IMAGETYPE_AVIF );
+echo "\n\n";
+
+
         $this->assertSame(IMAGETYPE_AVIF, exif_imagetype($this->root . 'ci-logo.avif'));
     }