Added tests

src/Drivers/Abstract/AbstractColor.php

@@ -4,6 +4,12 @@ namespace Intervention\Image\Drivers\Abstract;
 
 abstract class AbstractColor
 {
+    /**
+     * Format color to hexadecimal color code
+     *
+     * @param  string $prefix
+     * @return string
+     */
     public function toHex(string $prefix = ''): string
     {
         return sprintf(
@@ -14,4 +20,14 @@ abstract class AbstractColor
             $this->blue()
         );
     }
+
+    /**
+     * Determine if color is greyscale
+     *
+     * @return boolean
+     */
+    public function isGreyscale(): bool
+    {
+        return ($this->red() === $this->green()) && ($this->green() === $this->blue());
+    }
 }

src/Drivers/Gd/Decoders/BinaryImageDecoder.php

@@ -33,7 +33,9 @@ class BinaryImageDecoder extends AbstractDecoder implements DecoderInterface
             $this->fail();
         }
 
-        $gd = $this->gdImageToTruecolor($gd);
+        if (! imageistruecolor($gd)) {
+            imagepalettetotruecolor($gd);
+        }
 
         return new Image(new Collection([new Frame($gd)]));
     }
@@ -58,32 +60,4 @@ class BinaryImageDecoder extends AbstractDecoder implements DecoderInterface
 
         return $image;
     }
-
-    /**
-     * Transform GD image into truecolor version
-     *
-     * @param  GdImage $gd
-     * @return bool
-     */
-    public function gdImageToTruecolor(GdImage $gd): GdImage
-    {
-        $width = imagesx($gd);
-        $height = imagesy($gd);
-
-        // new canvas
-        $canvas = imagecreatetruecolor($width, $height);
-
-        // fill with transparent color
-        imagealphablending($canvas, false);
-        $transparent = imagecolorallocatealpha($canvas, 255, 255, 255, 127);
-        imagefilledrectangle($canvas, 0, 0, $width, $height, $transparent);
-        imagecolortransparent($canvas, $transparent);
-        imagealphablending($canvas, true);
-
-        // copy original
-        imagecopy($canvas, $gd, 0, 0, 0, 0, $width, $height);
-        imagedestroy($gd);
-
-        return $canvas;
-    }
 }

tests/Drivers/Gd/Modifiers/GreyscaleModifierTest.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace Intervention\Image\Tests\Drivers\Gd\Modifiers;
+
+use Intervention\Image\Tests\TestCase;
+use Intervention\Image\Drivers\Gd\Image;
+use Intervention\Image\Drivers\Gd\Modifiers\GreyscaleModifier;
+use Intervention\Image\Tests\Traits\CanCreateGdTestImage;
+
+class GreyscaleModifierTest extends TestCase
+{
+    use CanCreateGdTestImage;
+
+    public function testColorChange(): void
+    {
+        $image = $this->createTestImage('trim.png');
+        $this->assertFalse($image->pickColor(0, 0)->isGreyscale());
+        $image->modify(new GreyscaleModifier());
+        $this->assertTrue($image->pickColor(0, 0)->isGreyscale());
+    }
+}

tests/Drivers/Gd/Modifiers/ResizeModifierTest.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace Intervention\Image\Tests\Drivers\Gd\Modifiers;
+
+use Intervention\Image\Drivers\Gd\Image;
+use Intervention\Image\Drivers\Gd\Modifiers\ResizeModifier;
+use Intervention\Image\Geometry\Size;
+use Intervention\Image\Tests\TestCase;
+use Intervention\Image\Tests\Traits\CanCreateGdTestImage;
+
+class ResizeModifierTest extends TestCase
+{
+    use CanCreateGdTestImage;
+
+    public function testColorChange(): void
+    {
+        $image = $this->createTestImage('trim.png');
+        $this->assertEquals(50, $image->width());
+        $this->assertEquals(50, $image->height());
+        $image->modify(new ResizeModifier(new Size(30, 20)));
+        $this->assertEquals(30, $image->width());
+        $this->assertEquals(20, $image->height());
+    }
+}

tests/Drivers/Imagick/Modifiers/GreyscaleModifierTest.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace Intervention\Image\Tests\Drivers\Imagick\Modifiers;
+
+use Intervention\Image\Tests\TestCase;
+use Intervention\Image\Drivers\Imagick\Image;
+use Intervention\Image\Drivers\Imagick\Modifiers\GreyscaleModifier;
+use Intervention\Image\Tests\Traits\CanCreateImagickTestImage;
+
+class GreyscaleModifierTest extends TestCase
+{
+    use CanCreateImagickTestImage;
+
+    public function testColorChange(): void
+    {
+        $image = $this->createTestImage('trim.png');
+        $this->assertFalse($image->pickColor(0, 0)->isGreyscale());
+        $image->modify(new GreyscaleModifier());
+        $this->assertTrue($image->pickColor(0, 0)->isGreyscale());
+    }
+}

tests/Drivers/Imagick/Modifiers/ResizeModifierTest.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace Intervention\Image\Tests\Drivers\Imagick\Modifiers;
+
+use Intervention\Image\Drivers\Imagick\Image;
+use Intervention\Image\Drivers\Imagick\Modifiers\ResizeModifier;
+use Intervention\Image\Geometry\Size;
+use Intervention\Image\Tests\TestCase;
+use Intervention\Image\Tests\Traits\CanCreateImagickTestImage;
+
+class ResizeModifierTest extends TestCase
+{
+    use CanCreateImagickTestImage;
+
+    public function testColorChange(): void
+    {
+        $image = $this->createTestImage('trim.png');
+        $this->assertEquals(50, $image->width());
+        $this->assertEquals(50, $image->height());
+        $image->modify(new ResizeModifier(new Size(30, 20)));
+        $this->assertEquals(30, $image->width());
+        $this->assertEquals(20, $image->height());
+    }
+}