diff --git a/README.md b/README.md
index 1d38a1f..f46907c 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@ A tightly-focused library for performing a very limited set of simple image tran
 
 ## Roadmap
 
-This library is under active development, and until a 1.0 release is made you should expect it to potentially change its API and functionality. Possibly **drastically**. That said, I *do* have use of this thing for work, so I'm probably going to be working pretty dang hard on it, and hope to have a stable release by about November of 2020.
+This library is under active development, and until a 1.0 release is made you should expect it to potentially be broken, and unexpectedly and dramatically change its API and functionality. That said, I *do* have use of this thing for work, so I'm probably going to be working pretty dang hard on it, and hope to have a stable release by about November of 2020.
 
 ### Drivers
 
@@ -19,22 +19,40 @@ A 1.0 release will not be made until the following drivers are available and sol
 
 A 1.0 release will be made available once the following transforms are available and solidly tested across all drivers. These are basically what I see as the bare minimum for such a library to be useful.
 
-* rotate (in 90 degree increments)
-* mirror-h
-* mirror-v
-* max-width
-* max-height
-* fit (basically an alias for max-width and max-height)
-* cover (scale to cover a box, then crop excess)
-* crop (crop toward the center to a given size)
-* cover-crop (convenience transform, combining cover and crop, useful for thumbnails)
+* orientation
+  * rotate (in 90 degree increments)
+  * mirror-h
+  * mirror-v
+* size
+  * fit (basically an alias for max-width and max-height)
+  * cover (scale to cover a box, then crop excess)
+  * crop (crop toward the center to a given size)
+  * cover-crop (convenience transform, combining cover and crop, useful for thumbnails)
 
-The following transforms are also on my mind as possibilities, but may or may not make it into 1.0:
+More complex, and also lesser used effects/stages that may or may not make it into 1.0
 
-* grayscale
-* colorize (needs to function consistently though)
-* overlay (i.e. for watermarking)
-* blur
-* hue
-* saturation
-* brightness
+* color effects
+  * grayscale
+  * colorize
+* content effects
+  * overlay
+  * blur
+  * hue
+  * saturation
+  * brightness
+
+#### Order of operations
+
+In the name of simplicity and ease of use, the effective order of operations will always be as reflected above:
+
+1. Orientation
+2. Resizing and cropping
+3. Color effects
+4. Content-changing effects
+
+This is only the effective order of operations, because to improve performance the *actual* order of operations, if applicable, will be:
+
+1. Resizing and cropping
+2. Orientation
+3. Color effects
+4. Content-changing effects
diff --git a/composer.json b/composer.json
index e244830..58ccc06 100644
--- a/composer.json
+++ b/composer.json
@@ -21,5 +21,14 @@
     "require": {
         "php": ">=7.1",
         "ext-gd": "*"
+    },
+    "require-dev": {
+        "atoum/atoum": "^3.4",
+        "atoum/stubs": "^2.6"
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "ByJoby\\ImageTransform\\tests\\": "tests/"
+        }
     }
 }
diff --git a/composer.lock b/composer.lock
index 1261ea0..f02ad11 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,17 +4,148 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "6eb3038135c5de665d7b86ae7ecb3427",
+    "content-hash": "5972ee7f683ce7e0b61ef2140ae044e9",
     "packages": [],
-    "packages-dev": [],
+    "packages-dev": [
+        {
+            "name": "atoum/atoum",
+            "version": "3.4.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/atoum/atoum.git",
+                "reference": "e90606b89e62c5c18c5d02596078edf55f35b3c3"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/atoum/atoum/zipball/e90606b89e62c5c18c5d02596078edf55f35b3c3",
+                "reference": "e90606b89e62c5c18c5d02596078edf55f35b3c3",
+                "shasum": ""
+            },
+            "require": {
+                "ext-hash": "*",
+                "ext-json": "*",
+                "ext-tokenizer": "*",
+                "ext-xml": "*",
+                "php": "^5.6.0 || ^7.0.0 <7.5.0"
+            },
+            "replace": {
+                "mageekguy/atoum": "*"
+            },
+            "require-dev": {
+                "friendsofphp/php-cs-fixer": "^2"
+            },
+            "suggest": {
+                "atoum/stubs": "Provides IDE support (like autocompletion) for atoum",
+                "ext-mbstring": "Provides support for UTF-8 strings",
+                "ext-xdebug": "Provides code coverage report (>= 2.3)"
+            },
+            "bin": [
+                "bin/atoum"
+            ],
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "3.x-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "classes/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Frédéric Hardy",
+                    "email": "frederic.hardy@atoum.org",
+                    "homepage": "http://blog.mageekbox.net"
+                },
+                {
+                    "name": "François Dussert",
+                    "email": "francois.dussert@atoum.org"
+                },
+                {
+                    "name": "Gérald Croes",
+                    "email": "gerald.croes@atoum.org"
+                },
+                {
+                    "name": "Julien Bianchi",
+                    "email": "julien.bianchi@atoum.org"
+                },
+                {
+                    "name": "Ludovic Fleury",
+                    "email": "ludovic.fleury@atoum.org"
+                }
+            ],
+            "description": "Simple modern and intuitive unit testing framework for PHP 5.3+",
+            "homepage": "http://www.atoum.org",
+            "keywords": [
+                "TDD",
+                "atoum",
+                "test",
+                "unit testing"
+            ],
+            "time": "2020-03-04T10:29:09+00:00"
+        },
+        {
+            "name": "atoum/stubs",
+            "version": "2.6.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/atoum/stubs.git",
+                "reference": "df8b73b0358de7283ecba91d8f4a9683f583993d"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/atoum/stubs/zipball/df8b73b0358de7283ecba91d8f4a9683f583993d",
+                "reference": "df8b73b0358de7283ecba91d8f4a9683f583993d",
+                "shasum": ""
+            },
+            "suggest": {
+                "atoum/atoum": "Include atoum in your projet dependencies"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.x-dev"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Julien Bianchi",
+                    "email": "julien.bianchi@atoum.org"
+                },
+                {
+                    "name": "Ludovic Fleury",
+                    "email": "ludovic.fleury@atoum.org"
+                }
+            ],
+            "description": "Stubs for atoum, the simple modern and intuitive unit testing framework for PHP 5.3+",
+            "homepage": "http://www.atoum.org",
+            "keywords": [
+                "TDD",
+                "atoum",
+                "test",
+                "unit testing"
+            ],
+            "time": "2018-01-29T22:41:37+00:00"
+        }
+    ],
     "aliases": [],
     "minimum-stability": "stable",
     "stability-flags": [],
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": {
+        "php": ">=7.1",
         "ext-gd": "*"
     },
-    "platform-dev": [],
-    "plugin-api-version": "1.1.0"
+    "platform-dev": []
 }
diff --git a/debug.log b/debug.log
new file mode 100644
index 0000000..2226f75
--- /dev/null
+++ b/debug.log
@@ -0,0 +1,2 @@
+[1001/084735.845:ERROR:registration_protocol_win.cc(103)] CreateFile: The system cannot find the file specified. (0x2)
+[1001/084736.163:ERROR:registration_protocol_win.cc(103)] CreateFile: The system cannot find the file specified. (0x2)
diff --git a/examples/example-portrait.jpg b/examples/example-portrait.jpg
new file mode 100644
index 0000000..1c6db2f
Binary files /dev/null and b/examples/example-portrait.jpg differ
diff --git a/examples/usage.php b/examples/usage.php
new file mode 100644
index 0000000..2a9a839
--- /dev/null
+++ b/examples/usage.php
@@ -0,0 +1,30 @@
+<?php
+
+use ByJoby\ImageTransform\Drivers\ImagickCLIDriver;
+use ByJoby\ImageTransform\Sizers\Cover;
+use ByJoby\ImageTransform\Sizers\Crop;
+use ByJoby\ImageTransform\Sizers\Fit;
+use ByJoby\ImageTransform\Sizers\Original;
+
+include __DIR__ . '/../vendor/autoload.php';
+
+$driver = new ImagickCLIDriver();
+// $sizer = new Fit(1000, 500);
+// $sizer = new Original();
+$sizer = new Crop(500,400);
+
+$image = $driver->image(
+    'example-portrait.jpg',
+    $sizer
+);
+// $image->rotate();
+
+var_dump(
+    'crop: width: '.$image->sizer()->cropToWidth(),
+    'crop: height: '.$image->sizer()->cropToHeight(),
+    'resize: width: '.$image->sizer()->resizeToWidth(),
+    'resize: height: '.$image->sizer()->resizeToHeight(),
+    'final: width: '.$image->width(),
+    'final: height: '.$image->height(),
+    $image
+);
diff --git a/src/DriverInterface.php b/src/DriverInterface.php
index 0b0e91f..6317ad7 100644
--- a/src/DriverInterface.php
+++ b/src/DriverInterface.php
@@ -2,9 +2,9 @@
 /* image-transform | https://github.com/jobyone/image-transform | MIT License */
 namespace ByJoby\ImageTransform;
 
+use ByJoby\ImageTransform\Sizers\AbstractSizer;
+
 interface DriverInterface
 {
-    public function source(string $source);
-    public function originalWidth(): int;
-    public function originalHeight(): int;
+    public function image(string $src, AbstractSizer $sizer): Image;
 }
diff --git a/src/Drivers/AbstractCLIDriver.php b/src/Drivers/AbstractCLIDriver.php
new file mode 100644
index 0000000..a493134
--- /dev/null
+++ b/src/Drivers/AbstractCLIDriver.php
@@ -0,0 +1,21 @@
+<?php
+/* image-transform | https://github.com/jobyone/image-transform | MIT License */
+namespace ByJoby\ImageTransform\Drivers;
+
+abstract class AbstractCLIDriver extends AbstractDriver
+{
+    protected $executablePath = '';
+
+    public function __construct()
+    {
+        if (!function_exists('exec')) {
+            throw new \Exception("CLI drivers can't be used with the current configuration because exec is disabled");
+        }
+        parent::__construct();
+    }
+
+    public function executablePath($name)
+    {
+        return $this->executablePath.$name;
+    }
+}
diff --git a/src/Drivers/AbstractDriver.php b/src/Drivers/AbstractDriver.php
index 9750c0d..c6640a9 100644
--- a/src/Drivers/AbstractDriver.php
+++ b/src/Drivers/AbstractDriver.php
@@ -3,23 +3,64 @@
 namespace ByJoby\ImageTransform\Drivers;
 
 use ByJoby\ImageTransform\DriverInterface;
+use ByJoby\ImageTransform\Image;
+use ByJoby\ImageTransform\Sizers\AbstractSizer;
 
 abstract class AbstractDriver implements DriverInterface
 {
-    protected $source;
+    protected $tmpDir = null;
+    protected $chmod = 0775;
 
-    public function source(string $source)
+    public function __construct()
     {
-        // set source
-        $this->source = $source;
-        // validate file
-        if (!is_file($this->source)) {
-            throw new \Exception("Image file doesn't exist: " . htmlentities($this->source));
+        $this->__clone();
+    }
+
+    public function __clone()
+    {
+        $this->setTempDir(sys_get_temp_dir() . '/byjoby_image-transform/' . uniqid("",true));
+    }
+
+    public function image(string $src, AbstractSizer $sizer): Image
+    {
+        return new Image($src, $this, $sizer);
+    }
+
+    public function setTempDir(string $dir)
+    {
+        if (!$this->mkdir($dir)) {
+            throw new \Exception("Temp directory " . htmlentities($dir) . " doesn't exist or isn't writeable, and couldn't be created.");
         }
-        if (!exif_imagetype($this->source)) {
-            throw new \Exception("Invalid image file: " . htmlentities($this->source));
+        $this->tmpDir = $dir;
+    }
+
+    protected function mkdir(string $dir)
+    {
+        // return true if dir exists and is writeable
+        if (is_dir($dir) && is_writeable($dir)) {
+            return true;
+        }
+        // recursively ensure parent directory exists
+        $parent = dirname($dir);
+        $this->mkdir($parent);
+        // try to create this directory if it doesn't exist
+        if (is_dir($parent)) {
+            // check parent permissions
+            if (!is_writeable($parent)) {
+                chmod($parent, $this->chmod);
+            }
+            if (!is_writeable($parent)) {
+                return false;
+            }
+            // create this directory
+            if (!mkdir($dir)) {
+                return false;
+            }
+            chmod($dir, $this->chmod);
+            return is_writeable($dir);
+        } else {
+            // parent doesn't exist, so recursive call failed
+            return false;
         }
-        // get height/width
-        list($this->originalWidth, $this->originalHeight) = getimagesize($this->source);
     }
 }
diff --git a/src/Drivers/ImagickCLIDriver.php b/src/Drivers/ImagickCLIDriver.php
index dee889a..8175f95 100644
--- a/src/Drivers/ImagickCLIDriver.php
+++ b/src/Drivers/ImagickCLIDriver.php
@@ -9,5 +9,5 @@ namespace ByJoby\ImageTransform\Drivers;
  * require that you have CLI Imagick installed, and that your server allows
  * PHP's exec() function to use it.
  */
-class ImagickCLIDriver extends AbstractDriver
+class ImagickCLIDriver extends AbstractCLIDriver
 {}
diff --git a/src/Image.php b/src/Image.php
index b0d2b38..e1596b5 100644
--- a/src/Image.php
+++ b/src/Image.php
@@ -2,30 +2,104 @@
 /* image-transform | https://github.com/jobyone/image-transform | MIT License */
 namespace ByJoby\ImageTransform;
 
+use ByJoby\ImageTransform\Sizers\AbstractSizer;
+
 class Image
 {
-    protected $src, $driver;
-    protected $transforms = [];
+    protected $source, $driver;
+    protected $originalWidth, $originalHeight;
+    protected $rotation = 0;
+    protected $flipH = false;
+    protected $flipV = false;
+    protected $sizer = null;
 
-    public function __construct(string $src, DriverInterface $driver)
+    public function __construct(string $source, DriverInterface $driver, AbstractSizer $sizer)
     {
-        $this->src = $src;
+        $this->source($source);
+        $this->sizer($sizer);
         $this->driver = clone $driver;
-        $this->driver->source($src);
     }
 
-    public function transform(TransformInterface $transform)
+    public function source(string $source)
     {
-        $this->transforms[] = $transform;
+        // set source
+        $this->source = realpath($source);
+        if (!$this->source) {
+            throw new \Exception("Source image not found: " . htmlentities($source));
+        }
+        // validate file
+        if (!is_file($this->source)) {
+            throw new \Exception("Image file doesn't exist: " . htmlentities($this->source));
+        }
+        if (!exif_imagetype($this->source)) {
+            throw new \Exception("Invalid image file: " . htmlentities($this->source));
+        }
+        // get height/width
+        list($this->originalWidth, $this->originalHeight) = getimagesize($this->source);
+    }
+
+    public function sizer(AbstractSizer $sizer = null): AbstractSizer
+    {
+        if ($sizer) {
+            $this->sizer = clone $sizer;
+            $this->sizer->image($this);
+        }
+        return $this->sizer;
+    }
+
+    public function rotate(int $steps = 1)
+    {
+        $this->rotation = ($this->rotation + $steps) % 4;
+    }
+
+    public function rotation(): int
+    {
+        return $this->rotation;
+    }
+
+    public function flipH()
+    {
+        $this->flipH = !$this->flipH;
+        if ($this->flipH && $this->flipV) {
+            $this->flipH = $this->flipV = false;
+        }
+    }
+
+    public function flipV()
+    {
+        $this->flipV = !$this->flipV;
+        if ($this->flipH && $this->flipV) {
+            $this->flipH = $this->flipV = false;
+        }
+    }
+
+    public function width(): int
+    {
+        return $this->sizer->width();
+    }
+
+    public function height(): int
+    {
+        return $this->sizer->height();
+    }
+
+    public function ratio(): float
+    {
+        return $this->width() / $this->height();
+    }
+
+    public function originalRatio(): float
+    {
+        return $this->originalWidth() / $this->originalHeight();
     }
 
     public function originalWidth(): int
     {
-        return $this->driver->originalWidth();
+        return $this->originalWidth;
     }
 
     public function originalHeight(): int
     {
-        return $this->driver->originalHeight();
+        return $this->originalHeight;
     }
 }
diff --git a/src/Sizers/AbstractSizer.php b/src/Sizers/AbstractSizer.php
new file mode 100644
index 0000000..08f8834
--- /dev/null
+++ b/src/Sizers/AbstractSizer.php
@@ -0,0 +1,53 @@
+<?php
+/* image-transform | https://github.com/jobyone/image-transform | MIT License */
+namespace ByJoby\ImageTransform\Sizers;
+
+use ByJoby\ImageTransform\Image;
+
+abstract class AbstractSizer
+{
+    protected $image;
+
+    abstract public function width(): int;
+    abstract public function height(): int;
+    abstract public function cropToWidth(): ?int;
+    abstract public function cropToHeight(): ?int;
+
+    public function resizeToWidth(): ?int
+    {
+        return $this->width();
+    }
+
+    public function resizeToHeight(): ?int
+    {
+        return $this->height();
+    }
+
+    public function originalWidth(): int
+    {
+        if ($this->image->rotation() % 2) {
+            return $this->image->originalHeight();
+        }else {
+            return $this->image->originalWidth();
+        }
+    }
+
+    public function originalHeight(): int
+    {
+        if ($this->image->rotation() % 2) {
+            return $this->image->originalWidth();
+        }else {
+            return $this->image->originalHeight();
+        }
+    }
+
+    public function originalRatio(): float
+    {
+        return $this->originalWidth()/$this->originalHeight();
+    }
+
+    public function image(Image $image)
+    {
+        $this->image = $image;
+    }
+}
diff --git a/src/Sizers/Cover.php b/src/Sizers/Cover.php
new file mode 100644
index 0000000..8eaa0ed
--- /dev/null
+++ b/src/Sizers/Cover.php
@@ -0,0 +1,54 @@
+<?php
+/* image-transform | https://github.com/jobyone/image-transform | MIT License */
+namespace ByJoby\ImageTransform\Sizers;
+
+class Cover extends AbstractSizer
+{
+    protected $width, $height;
+
+    public function __construct(int $width, int $height)
+    {
+        $this->width = $width;
+        $this->height = $height;
+    }
+
+    protected function targetRatio(): float
+    {
+        return $this->width / $this->height;
+    }
+
+    protected function calculateSize(): array
+    {
+        if ($this->targetRatio() < $this->originalRatio()) {
+            $height = $this->height;
+            $width = round($height * $this->originalRatio());
+        } else {
+            $width = $this->width;
+            $height = round($width / $this->originalRatio());
+        }
+        return [
+            'height' => $height,
+            'width' => $width,
+        ];
+    }
+
+    public function width(): int
+    {
+        return $this->calculateSize()['width'];
+    }
+
+    public function height(): int
+    {
+        return $this->calculateSize()['height'];
+    }
+
+    public function cropToWidth(): ?int
+    {
+        return $this->width;
+    }
+
+    public function cropToHeight(): ?int
+    {
+        return $this->height;
+    }
+}
diff --git a/src/Sizers/Crop.php b/src/Sizers/Crop.php
new file mode 100644
index 0000000..eaf38c6
--- /dev/null
+++ b/src/Sizers/Crop.php
@@ -0,0 +1,44 @@
+<?php
+/* image-transform | https://github.com/jobyone/image-transform | MIT License */
+namespace ByJoby\ImageTransform\Sizers;
+
+class Crop extends AbstractSizer
+{
+    protected $width, $height;
+
+    public function __construct(int $width, int $height)
+    {
+        $this->width = $width;
+        $this->height = $height;
+    }
+
+    public function width(): int
+    {
+        return $this->width;
+    }
+
+    public function height(): int
+    {
+        return $this->height;
+    }
+
+    public function resizeToHeight(): ?int
+    {
+        return null;
+    }
+
+    public function resizeToWidth(): ?int
+    {
+        return null;
+    }
+
+    public function cropToWidth(): ?int
+    {
+        return $this->width;
+    }
+
+    public function cropToHeight(): ?int
+    {
+        return $this->height;
+    }
+}
diff --git a/src/Sizers/Fit.php b/src/Sizers/Fit.php
new file mode 100644
index 0000000..8c46839
--- /dev/null
+++ b/src/Sizers/Fit.php
@@ -0,0 +1,54 @@
+<?php
+/* image-transform | https://github.com/jobyone/image-transform | MIT License */
+namespace ByJoby\ImageTransform\Sizers;
+
+class Fit extends AbstractSizer
+{
+    protected $width, $height;
+
+    public function __construct(int $width, int $height)
+    {
+        $this->width = $width;
+        $this->height = $height;
+    }
+
+    public function cropToWidth(): ?int
+    {
+        return null;
+    }
+
+    public function cropToHeight(): ?int
+    {
+        return null;
+    }
+
+    protected function targetRatio(): float
+    {
+        return $this->width / $this->height;
+    }
+
+    protected function calculateSize(): array
+    {
+        if ($this->targetRatio() > $this->originalRatio()) {
+            $height = $this->height;
+            $width = round($height * $this->originalRatio());
+        } else {
+            $width = $this->width;
+            $height = round($width / $this->originalRatio());
+        }
+        return [
+            'height' => $height,
+            'width' => $width,
+        ];
+    }
+
+    public function width(): int
+    {
+        return $this->calculateSize()['width'];
+    }
+
+    public function height(): int
+    {
+        return $this->calculateSize()['height'];
+    }
+}
diff --git a/src/Sizers/Original.php b/src/Sizers/Original.php
new file mode 100644
index 0000000..38e2e4e
--- /dev/null
+++ b/src/Sizers/Original.php
@@ -0,0 +1,36 @@
+<?php
+/* image-transform | https://github.com/jobyone/image-transform | MIT License */
+namespace ByJoby\ImageTransform\Sizers;
+
+class Original extends AbstractSizer
+{
+    public function resizeToWidth(): ?int
+    {
+        return null;
+    }
+
+    public function resizeToHeight(): ?int
+    {
+        return null;
+    }
+
+    public function cropToWidth(): ?int
+    {
+        return null;
+    }
+
+    public function cropToHeight(): ?int
+    {
+        return null;
+    }
+
+    public function width(): int
+    {
+        return $this->originalWidth();
+    }
+
+    public function height(): int
+    {
+        return $this->originalHeight();
+    }
+}
diff --git a/src/TransformInterface.php b/src/TransformInterface.php
deleted file mode 100644
index 7eeaf3d..0000000
--- a/src/TransformInterface.php
+++ /dev/null
@@ -1,52 +0,0 @@
-<?php
-/* image-transform | https://github.com/jobyone/image-transform | MIT License */
-namespace ByJoby\ImageTransform;
-
-interface TransformInterface
-{
-    /**
-     * Whether this transformer changes the contents of the image. Used when
-     * optimizing transformation order.
-     */
-    const CHANGES_CONTENT = false;
-
-    /**
-     * Whether this transformer changes the size of the image. Used when
-     * optimizing transformation order.
-     */
-    const CHANGES_SIZE = false;
-
-    /**
-     * Whether this transformer changes the colors of the image. Used when
-     * optimizing transformation order.
-     */
-    const CHANGES_COLOR = false;
-
-    /**
-     * Whether or not applying this transform multiple times will always
-     * produce the same result. Used with optimizing transformation order.
-     */
-    const TRANSFORM_STABLE = true;
-
-    /**
-     * Optionally return an array of other transforms that perform the
-     * operations necessary to perform this single transform.
-     * 
-     * If this method returns anything, the Image object will add the
-     * Transformers returned here, and this object will be discarded.
-     * 
-     * This allows new Transformers to be constructed by composing
-     * existing ones.
-     *
-     * @return array
-     */
-    public function chain(): array;
-
-    /**
-     * Return whether or not this transformation will impact the given
-     * Image. Should return true if it's possible, as it will be
-     * skipped if it returns false.
-     *  @return bool
-     */
-    public function willTransform(Image $image): bool;
-}
diff --git a/src/Transforms/AbstractTransform.php b/src/Transforms/AbstractTransform.php
deleted file mode 100644
index f1d30eb..0000000
--- a/src/Transforms/AbstractTransform.php
+++ /dev/null
@@ -1,19 +0,0 @@
-<?php
-/* image-transform | https://github.com/jobyone/image-transform | MIT License */
-namespace ByJoby\ImageTransform\Drivers;
-
-use ByJoby\ImageTransform\Image;
-use ByJoby\ImageTransform\TransformInterface;
-
-abstract class AbstractTransform implements TransformInterface
-{
-    public function chain(): array
-    {
-        return [];
-    }
-
-    public function willTransform(Image $image): bool
-    {
-        return true;
-    }
-}
diff --git a/src/Transforms/MaxWidth.php b/src/Transforms/MaxWidth.php
deleted file mode 100644
index bc0a44e..0000000
--- a/src/Transforms/MaxWidth.php
+++ /dev/null
@@ -1,26 +0,0 @@
-<?php
-/* image-transform | https://github.com/jobyone/image-transform | MIT License */
-namespace ByJoby\ImageTransform\Drivers;
-
-use ByJoby\ImageTransform\Image;
-
-class MaxWidth extends AbstractTransform
-{
-    const CHANGES_SIZE = true;
-
-    protected $size;
-
-    public function __construct(int $size)
-    {
-        $this->size = $size;
-    }
-
-    public function willTransform(Image $image): bool
-    {
-        if ($image->originalWidth() <= $this->size) {
-            return false;
-        } else {
-            return true;
-        }
-    }
-}
diff --git a/tests/units/Sizers/Cover.php b/tests/units/Sizers/Cover.php
new file mode 100644
index 0000000..ba9f46e
--- /dev/null
+++ b/tests/units/Sizers/Cover.php
@@ -0,0 +1,10 @@
+<?php
+/* image-transform | https://github.com/jobyone/image-transform | MIT License */
+namespace ByJoby\ImageTransform\tests\units\Sizers;
+
+use atoum;
+
+class Cover extends atoum
+{
+    
+}