Optimize code

src/Drivers/Gd/Decoders/AbstractDecoder.php

@@ -26,10 +26,6 @@ abstract class AbstractDecoder extends SpecializableDecoder implements Specializ
             throw new DecoderException('Unable to detect media (MIME) from data in file path.');
         }
 
-        if (!array_key_exists('mime', $info)) {
-            throw new DecoderException('Unable to detect media (MIME) from data in file path.');
-        }
-
         return MediaType::from($info['mime']);
     }
 
@@ -48,10 +44,6 @@ abstract class AbstractDecoder extends SpecializableDecoder implements Specializ
             throw new DecoderException('Unable to detect media (MIME) from binary data.');
         }
 
-        if (!array_key_exists('mime', $info)) {
-            throw new DecoderException('Unable to detect media (MIME) from binary data.');
-        }
-
         return MediaType::from($info['mime']);
     }
 }

src/Drivers/Gd/Frame.php

@@ -6,6 +6,7 @@ namespace Intervention\Image\Drivers\Gd;
 
 use GdImage;
 use Intervention\Image\Exceptions\ColorException;
+use Intervention\Image\Exceptions\InputException;
 use Intervention\Image\Geometry\Rectangle;
 use Intervention\Image\Image;
 use Intervention\Image\Interfaces\DriverInterface;
@@ -112,9 +113,14 @@ class Frame implements FrameInterface
      * {@inheritdoc}
      *
      * @see FrameInterface::setDispose()
+     * @throws InputException
      */
     public function setDispose(int $dispose): FrameInterface
     {
+        if (!in_array($dispose, [0, 1, 2, 3])) {
+            throw new InputException('Value for argument $dispose must be 0, 1, 2 or 3.');
+        }
+
         $this->dispose = $dispose;
 
         return $this;

src/Drivers/Imagick/Frame.php

@@ -7,6 +7,7 @@ namespace Intervention\Image\Drivers\Imagick;
 use Imagick;
 use ImagickException;
 use ImagickPixel;
+use Intervention\Image\Exceptions\InputException;
 use Intervention\Image\Geometry\Rectangle;
 use Intervention\Image\Image;
 use Intervention\Image\Interfaces\DriverInterface;
@@ -111,9 +112,14 @@ class Frame implements FrameInterface
      * {@inheritdoc}
      *
      * @see DriverInterface::setDispose()
+     * @throws InputException
      */
     public function setDispose(int $dispose): FrameInterface
     {
+        if (!in_array($dispose, [0, 1, 2, 3])) {
+            throw new InputException('Value for argument $dispose must be 0, 1, 2 or 3.');
+        }
+
         $this->native->setImageDispose($dispose);
 
         return $this;

tests/Unit/Drivers/Gd/FrameTest.php

@@ -66,9 +66,9 @@ final class FrameTest extends BaseTestCase
         $frame = $this->getTestFrame();
         $this->assertEquals(1, $frame->dispose());
 
-        $result = $frame->setDispose(100);
+        $result = $frame->setDispose(3);
         $this->assertInstanceOf(Frame::class, $result);
-        $this->assertEquals(100, $frame->dispose());
+        $this->assertEquals(3, $frame->dispose());
     }
 
     public function testSetGetOffsetLeft(): void

tests/Unit/Drivers/Imagick/FrameTest.php

@@ -23,7 +23,7 @@ final class FrameTest extends BaseTestCase
         $imagick = new Imagick();
         $imagick->newImage(3, 2, new ImagickPixel('red'), 'png');
         $imagick->setImageDelay(125); // 1.25 seconds
-        $imagick->setImageDispose(5);
+        $imagick->setImageDispose(0);
         $imagick->setImagePage(3, 2, 8, 9);
 
         return new Frame($imagick);
@@ -55,11 +55,11 @@ final class FrameTest extends BaseTestCase
     public function testSetGetDispose(): void
     {
         $frame = $this->getTestFrame();
-        $this->assertEquals(5, $frame->dispose());
+        $this->assertEquals(0, $frame->dispose());
 
-        $result = $frame->setDispose(100);
+        $result = $frame->setDispose(3);
         $this->assertInstanceOf(Frame::class, $result);
-        $this->assertEquals(100, $frame->dispose());
+        $this->assertEquals(3, $frame->dispose());
     }
 
     public function testSetGetOffsetLeft(): void