diff --git a/.travis.yml b/.travis.yml
index fb74d8a..161aa57 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,6 @@
 language: php
 
-sudo: false
+sudo: required
 
 branches:
   only:
@@ -11,7 +11,7 @@ cache:
        - $HOME/.composer/cache
 
 php:
-    - 5.3.3
+    - 5.3
     - 5.4
     - 5.5
     - 5.6
@@ -25,6 +25,10 @@ matrix:
         - php: hhvm
 
 before_install:
+    - sudo add-apt-repository -y ppa:moti-p/cc
+    - sudo apt-get update
+    - sudo apt-get -y --reinstall install imagemagick
+    - if [ "$TRAVIS_PHP_VERSION" = "hhvm" ]; then sudo apt-get -y --reinstall install libmagickwand4; fi;
     - composer self-update
 
 install:
diff --git a/Command.php b/Command.php
index 7a72690..baee0ec 100644
--- a/Command.php
+++ b/Command.php
@@ -17,6 +17,9 @@
  */
 class Command
 {
+    const RUN_NORMAL     = null;
+    const RUN_BACKGROUND = ' > /dev/null 2>&1';
+    const RUN_DEBUG      = ' 2>&1';
 
     /**
      * @var array The list of allowed ImageMagick binaries
@@ -105,13 +108,18 @@ public function __construct($imageMagickPath = '/usr/bin', $referencesDirectory
     /**
      * Executes the command and returns its response
      *
-     * @param bool $getErrors If set to true, STDERR will be redirected to STDOUT
+     * @param null $runMode
      *
      * @return CommandResponse
+     *
      */
-    public function run($getErrors = false)
+    public function run($runMode = self::RUN_NORMAL)
     {
-        exec($this->env.' '.$this->command.' '.$this->commandToAppend.($getErrors?' 2>&1':''), $output, $code);
+        if (!in_array($runMode, array(self::RUN_NORMAL, self::RUN_BACKGROUND, self::RUN_DEBUG))) {
+            throw new \InvalidArgumentException('The run mode must be one of '.__CLASS__.'::RUN_* constants.');
+        }
+
+        exec($this->env.' '.$this->command.' '.$this->commandToAppend.$runMode, $output, $code);
 
         return new CommandResponse($output, $code);
     }
diff --git a/ReferenceClasses/Geometry.php b/ReferenceClasses/Geometry.php
index b559710..93c98f1 100644
--- a/ReferenceClasses/Geometry.php
+++ b/ReferenceClasses/Geometry.php
@@ -14,11 +14,14 @@
  * Represents an ImageMagick geometry parameter.
  * Each value is optional so a big regex is used to parse it.
  *
+ * How to build the monstruous regexp? Check the gist link.
+ *
+ * @link https://gist.github.com/Pierstoval/eac8d182d2c51c93202f
  * @link http://www.imagemagick.org/script/command-line-processing.php#geometry
  */
 class Geometry
 {
-    const REGEX_VALIDATE = '~^(?:x?[0-9]+(?:\.[0-9]+)?%?|[0-9]+(?:\.[0-9]+)?%?x[0-9]+(?:\.[0-9]+)?%?[\^!<>]?)?(?:[+-][0-9]+[+-][0-9]+)?$~';
+    const REGEX_VALIDATE = '~(?<size>(?<w>(?:\d*(?:\.\d+)?)?%?)?(?:(?<whseparator>x)(?<h>(?:\d*(?:\.\d+)?)?%?))?)(?<aspect>[!><@^])?(?<offset>(?<x>[+-]\d*(?:\.\d+)?)?(?<y>[+-]\d*(?:\.\d+)?)?)~';
 
     const RATIO_NONE    = null;
     const RATIO_MIN     = '^';
@@ -33,17 +36,6 @@ class Geometry
      */
     private $value = '';
 
-    public function __construct($width = null, $height = null, $x = null, $y = null, $aspectRatio = self::RATIO_NONE)
-    {
-        $args = func_get_args();
-        if (count(array_map(null, $args)) > 1) {
-            $geometry = call_user_func_array(array($this, 'createFromParameters'), $args);
-        } else {
-            $geometry = $width;
-        }
-        $this->value = $geometry;
-    }
-
     /**
      * @param string|int $width Can be both
      * @param string|int $height
@@ -56,8 +48,17 @@ public function __construct($width = null, $height = null, $x = null, $y = null,
     public static function createFromParameters($width = null, $height = null, $x = null, $y = null, $aspectRatio = self::RATIO_NONE)
     {
         $geometry = $width;
+
+        // If we have a height
+        // Or if we have width, no height and an offset
+        // If width is 100, it will result in 100x{offset}
+        // else, 100{offset} is incorrect
+        if (null !== $height || $width && !$height && (null !== $x || null !== $y)) {
+            $geometry .= 'x';
+        }
+
         if (null !== $height) {
-            $geometry .= 'x'.$height;
+            $geometry .= $height;
         }
 
         if ($aspectRatio && !in_array($aspectRatio, self::$validRatios)) {
@@ -82,19 +83,56 @@ public static function createFromParameters($width = null, $height = null, $x =
         return $geometry;
     }
 
+    public function __construct($width = null, $height = null, $x = null, $y = null, $aspectRatio = self::RATIO_NONE)
+    {
+        $args = func_get_args();
+        if (count(array_map(null, $args)) > 1) {
+            $geometry = call_user_func_array(array($this, 'createFromParameters'), $args);
+        } else {
+            $geometry = $width;
+        }
+        $this->value = $geometry;
+    }
+
     /**
      * @throws \InvalidArgumentException
      * @return string
      */
     public function validate()
     {
-        if (
-        !preg_match(static::REGEX_VALIDATE, $this->value)
-        ) {
+        $errors = array();
+
+        if (!preg_match(static::REGEX_VALIDATE, $this->value, $matches)) {
+            $errors[] = 'Invalid regexp.';
+        }
+
+        $w = isset($matches['w']) && '' !== $matches['w'] ? $matches['w'] : null;
+        $h = isset($matches['h']) && '' !== $matches['h'] ? $matches['h'] : null;
+        $x = isset($matches['x']) && '' !== $matches['x'] ? $matches['x'] : null;
+        $y = isset($matches['y']) && '' !== $matches['y'] ? $matches['y'] : null;
+        $offset = isset($matches['offset']) && '' !== $matches['offset'] ? $matches['offset'] : null;
+        $whseparator = $matches['whseparator'];
+        $aspect = $matches['aspect'];
+
+        // The next checks will perform post-regexp matching that is impossible with preg_match natively
+
+        if ('0' === $w || '0' === $h) {
+            $errors[] = 'Cannot specify zero width nor height.';
+        }
+        if ($aspect && !$w && !$h) {
+            $errors[] = 'Aspect can be used only with width and/or height.';
+        }
+
+        if ($w && !$h && ($x || $y) && !$whseparator) {
+            $errors[] = 'When using offsets and only width, you must specify the "x" separator like this: '.$w.'x'.$offset;
+        }
+
+        if (count($errors)) {
             throw new \InvalidArgumentException(sprintf(
-                "The specified geometry (%s) is invalid.\n".
-                "Please refer to ImageMagick command line documentation about geometry:\n%s",
+                "The specified geometry (%s) is invalid.\n%s\n".
+                "Please refer to ImageMagick command line documentation about geometry:\n%s\n",
                 $this->value,
+                implode("\n", $errors),
                 'http://www.imagemagick.org/script/command-line-processing.php#geometry'
             ));
         }
diff --git a/Tests/AbstractTestCase.php b/Tests/AbstractTestCase.php
new file mode 100644
index 0000000..50c97be
--- /dev/null
+++ b/Tests/AbstractTestCase.php
@@ -0,0 +1,40 @@
+<?php
+/*
+* This file is part of the OrbitaleImageMagickPHP package.
+*
+* (c) Alexandre Rock Ancelet <alex@orbitale.io>
+*
+* For the full copyright and license information, please view the LICENSE
+* file that was distributed with this source code.
+*/
+
+namespace Orbitale\Component\ImageMagick\Tests;
+
+class AbstractTestCase extends \PHPUnit_Framework_TestCase
+{
+
+    protected $resourcesDir;
+
+    public function __construct($name = null, array $data = array(), $dataName = '')
+    {
+        parent::__construct($name, $data, $dataName);
+        if (!defined('IMAGEMAGICK_DIR') || !defined('TEST_RESOURCES_DIR')) {
+            throw new \RuntimeException(
+                "The \"IMAGEMAGICK_DIR\" constant is not defined.\n" .
+                "The bootstrap must be correctly included before executing test suite."
+            );
+        }
+        $this->resourcesDir = TEST_RESOURCES_DIR;
+    }
+
+    public function setUp()
+    {
+        $dir = TEST_RESOURCES_DIR.'/outputs';
+        foreach (scandir($dir) as $file) {
+            if ('.' !== $file && '..' !== $file && '.gitkeep' !== $file) {
+                unlink($dir.'/'.$file);
+            }
+        }
+    }
+
+}
diff --git a/Tests/CommandTest.php b/Tests/CommandTest.php
index bdc3c15..d5ac566 100644
--- a/Tests/CommandTest.php
+++ b/Tests/CommandTest.php
@@ -12,33 +12,9 @@
 
 use Orbitale\Component\ImageMagick\Command;
 
-class CommandTest extends \PHPUnit_Framework_TestCase
+class CommandTest extends AbstractTestCase
 {
 
-    private $resourcesDir;
-
-    public function __construct($name = null, array $data = array(), $dataName = '')
-    {
-        parent::__construct($name, $data, $dataName);
-        if (!defined('IMAGEMAGICK_DIR') || !defined('TEST_RESOURCES_DIR')) {
-            throw new \RuntimeException(
-                "The \"IMAGEMAGICK_DIR\" constant is not defined.\n" .
-                "The bootstrap must be correctly included before executing test suite."
-            );
-        }
-        $this->resourcesDir = TEST_RESOURCES_DIR;
-    }
-
-    public function setUp()
-    {
-        $dir = TEST_RESOURCES_DIR.'/outputs';
-        foreach (scandir($dir) as $file) {
-            if ('.' !== $file && '..' !== $file && '.gitkeep' !== $file) {
-                unlink($dir.'/'.$file);
-            }
-        }
-    }
-
     /**
      * @dataProvider provideWrongConvertDirs
      */
diff --git a/Tests/GeometryTest.php b/Tests/GeometryTest.php
new file mode 100644
index 0000000..0c09fa3
--- /dev/null
+++ b/Tests/GeometryTest.php
@@ -0,0 +1,821 @@
+<?php
+/*
+* This file is part of the OrbitaleImageMagickPHP package.
+*
+* (c) Alexandre Rock Ancelet <alex@orbitale.io>
+*
+* For the full copyright and license information, please view the LICENSE
+* file that was distributed with this source code.
+*/
+
+namespace Orbitale\Component\ImageMagick\Tests;
+
+use Orbitale\Component\ImageMagick\Command;
+use Orbitale\Component\ImageMagick\ReferenceClasses\Geometry;
+
+class GeometryTest extends AbstractTestCase
+{
+
+    /**
+     * @dataProvider provideStaticCreations
+     */
+    public function testStaticCreation($expect, $width, $height, $x, $y, $aspectRatio)
+    {
+        $this->markTestIncomplete('TODO'); // TODO
+    }
+
+    public function provideStaticCreations()
+    {
+        return array(
+            array('100x100^+0+0', 100, 100, 0, 0, Geometry::RATIO_MIN),
+            array('x100^+0+0', null, 100, 0, 0, Geometry::RATIO_MIN),
+        );
+    }
+
+    /**
+     * @dataProvider provideRightGeometries
+     */
+    public function testGeometry($width, $height, $x, $y, $aspectRatio)
+    {
+        $geometry = new Geometry($width, $height, $x, $y, $aspectRatio);
+
+        try {
+            $validatedGeometry = $geometry->validate();
+        } catch (\Exception $e) {
+            $this->fail($e->getMessage());
+            return;
+        }
+
+        $this->assertInternalType('string', $validatedGeometry);
+        $this->assertNotEmpty($validatedGeometry);
+
+        if (0 === strlen($validatedGeometry)) {
+            $this->markTestSkipped('No geometry to check. ['.$validatedGeometry.'] ['.implode(',', func_get_args()).']');
+        }
+
+        $command = new Command(IMAGEMAGICK_DIR);
+
+        $command
+            ->convert($this->resourcesDir.'/moon_180.jpg')
+            ->resize($geometry)
+            ->file($this->resourcesDir.'/outputs/moon_180_test_geometry_'.uniqid($width.$height.$x.$y.$aspectRatio.'test_geo', true).'.jpg', false)
+        ;
+
+        $response = $command->run(Command::RUN_DEBUG);
+
+        $this->assertFalse($response->hasFailed(), "For geometry ".$geometry->validate().", ImageMagick error:\n".$response->getContent(true));
+    }
+
+    public function provideRightGeometries()
+    {
+        // width, height, x, y, aspectRatio
+        return array(
+            array(null, null, null, 0, null),
+            array(null, null, null, -1, null),
+            array(null, null, null, 1, null),
+            array(null, null, 0, null, null),
+            array(null, null, 0, 0, null),
+            array(null, null, 0, -1, null),
+            array(null, null, 0, 1, null),
+            array(null, null, -1, null, null),
+            array(null, null, -1, 0, null),
+            array(null, null, -1, -1, null),
+            array(null, null, -1, 1, null),
+            array(null, null, 1, null, null),
+            array(null, null, 1, 0, null),
+            array(null, null, 1, -1, null),
+            array(null, null, 1, 1, null),
+            array(null, 100, null, null, null),
+            array(null, 100, null, null, '<'),
+            array(null, 100, null, null, '!'),
+            array(null, 100, null, null, '^'),
+            array(null, 100, null, null, '>'),
+            array(null, 100, null, 0, null),
+            array(null, 100, null, 0, '<'),
+            array(null, 100, null, 0, '!'),
+            array(null, 100, null, 0, '^'),
+            array(null, 100, null, 0, '>'),
+            array(null, 100, null, -1, null),
+            array(null, 100, null, -1, '<'),
+            array(null, 100, null, -1, '!'),
+            array(null, 100, null, -1, '^'),
+            array(null, 100, null, -1, '>'),
+            array(null, 100, null, 1, null),
+            array(null, 100, null, 1, '<'),
+            array(null, 100, null, 1, '!'),
+            array(null, 100, null, 1, '^'),
+            array(null, 100, null, 1, '>'),
+            array(null, 100, 0, null, null),
+            array(null, 100, 0, null, '<'),
+            array(null, 100, 0, null, '!'),
+            array(null, 100, 0, null, '^'),
+            array(null, 100, 0, null, '>'),
+            array(null, 100, 0, 0, null),
+            array(null, 100, 0, 0, '<'),
+            array(null, 100, 0, 0, '!'),
+            array(null, 100, 0, 0, '^'),
+            array(null, 100, 0, 0, '>'),
+            array(null, 100, 0, -1, null),
+            array(null, 100, 0, -1, '<'),
+            array(null, 100, 0, -1, '!'),
+            array(null, 100, 0, -1, '^'),
+            array(null, 100, 0, -1, '>'),
+            array(null, 100, 0, 1, null),
+            array(null, 100, 0, 1, '<'),
+            array(null, 100, 0, 1, '!'),
+            array(null, 100, 0, 1, '^'),
+            array(null, 100, 0, 1, '>'),
+            array(null, 100, -1, null, null),
+            array(null, 100, -1, null, '<'),
+            array(null, 100, -1, null, '!'),
+            array(null, 100, -1, null, '^'),
+            array(null, 100, -1, null, '>'),
+            array(null, 100, -1, 0, null),
+            array(null, 100, -1, 0, '<'),
+            array(null, 100, -1, 0, '!'),
+            array(null, 100, -1, 0, '^'),
+            array(null, 100, -1, 0, '>'),
+            array(null, 100, -1, -1, null),
+            array(null, 100, -1, -1, '<'),
+            array(null, 100, -1, -1, '!'),
+            array(null, 100, -1, -1, '^'),
+            array(null, 100, -1, -1, '>'),
+            array(null, 100, -1, 1, null),
+            array(null, 100, -1, 1, '<'),
+            array(null, 100, -1, 1, '!'),
+            array(null, 100, -1, 1, '^'),
+            array(null, 100, -1, 1, '>'),
+            array(null, 100, 1, null, null),
+            array(null, 100, 1, null, '<'),
+            array(null, 100, 1, null, '!'),
+            array(null, 100, 1, null, '^'),
+            array(null, 100, 1, null, '>'),
+            array(null, 100, 1, 0, null),
+            array(null, 100, 1, 0, '<'),
+            array(null, 100, 1, 0, '!'),
+            array(null, 100, 1, 0, '^'),
+            array(null, 100, 1, 0, '>'),
+            array(null, 100, 1, -1, null),
+            array(null, 100, 1, -1, '<'),
+            array(null, 100, 1, -1, '!'),
+            array(null, 100, 1, -1, '^'),
+            array(null, 100, 1, -1, '>'),
+            array(null, 100, 1, 1, null),
+            array(null, 100, 1, 1, '<'),
+            array(null, 100, 1, 1, '!'),
+            array(null, 100, 1, 1, '^'),
+            array(null, 100, 1, 1, '>'),
+            array(100, null, null, null, null),
+            array(100, null, null, null, '<'),
+            array(100, null, null, null, '!'),
+            array(100, null, null, null, '^'),
+            array(100, null, null, null, '>'),
+            array(100, null, null, 0, null),
+            array(100, null, null, 0, '<'),
+            array(100, null, null, 0, '!'),
+            array(100, null, null, 0, '^'),
+            array(100, null, null, 0, '>'),
+            array(100, null, null, -1, null),
+            array(100, null, null, -1, '<'),
+            array(100, null, null, -1, '!'),
+            array(100, null, null, -1, '^'),
+            array(100, null, null, -1, '>'),
+            array(100, null, null, 1, null),
+            array(100, null, null, 1, '<'),
+            array(100, null, null, 1, '!'),
+            array(100, null, null, 1, '^'),
+            array(100, null, null, 1, '>'),
+            array(100, null, 0, null, null),
+            array(100, null, 0, null, '<'),
+            array(100, null, 0, null, '!'),
+            array(100, null, 0, null, '^'),
+            array(100, null, 0, null, '>'),
+            array(100, null, 0, 0, null),
+            array(100, null, 0, 0, '<'),
+            array(100, null, 0, 0, '!'),
+            array(100, null, 0, 0, '^'),
+            array(100, null, 0, 0, '>'),
+            array(100, null, 0, -1, null),
+            array(100, null, 0, -1, '<'),
+            array(100, null, 0, -1, '!'),
+            array(100, null, 0, -1, '^'),
+            array(100, null, 0, -1, '>'),
+            array(100, null, 0, 1, null),
+            array(100, null, 0, 1, '<'),
+            array(100, null, 0, 1, '!'),
+            array(100, null, 0, 1, '^'),
+            array(100, null, 0, 1, '>'),
+            array(100, null, -1, null, null),
+            array(100, null, -1, null, '<'),
+            array(100, null, -1, null, '!'),
+            array(100, null, -1, null, '^'),
+            array(100, null, -1, null, '>'),
+            array(100, null, -1, 0, null),
+            array(100, null, -1, 0, '<'),
+            array(100, null, -1, 0, '!'),
+            array(100, null, -1, 0, '^'),
+            array(100, null, -1, 0, '>'),
+            array(100, null, -1, -1, null),
+            array(100, null, -1, -1, '<'),
+            array(100, null, -1, -1, '!'),
+            array(100, null, -1, -1, '^'),
+            array(100, null, -1, -1, '>'),
+            array(100, null, -1, 1, null),
+            array(100, null, -1, 1, '<'),
+            array(100, null, -1, 1, '!'),
+            array(100, null, -1, 1, '^'),
+            array(100, null, -1, 1, '>'),
+            array(100, null, 1, null, null),
+            array(100, null, 1, null, '<'),
+            array(100, null, 1, null, '!'),
+            array(100, null, 1, null, '^'),
+            array(100, null, 1, null, '>'),
+            array(100, null, 1, 0, null),
+            array(100, null, 1, 0, '<'),
+            array(100, null, 1, 0, '!'),
+            array(100, null, 1, 0, '^'),
+            array(100, null, 1, 0, '>'),
+            array(100, null, 1, -1, null),
+            array(100, null, 1, -1, '<'),
+            array(100, null, 1, -1, '!'),
+            array(100, null, 1, -1, '^'),
+            array(100, null, 1, -1, '>'),
+            array(100, null, 1, 1, null),
+            array(100, null, 1, 1, '<'),
+            array(100, null, 1, 1, '!'),
+            array(100, null, 1, 1, '^'),
+            array(100, null, 1, 1, '>'),
+            array(100, 100, null, null, null),
+            array(100, 100, null, null, '<'),
+            array(100, 100, null, null, '!'),
+            array(100, 100, null, null, '^'),
+            array(100, 100, null, null, '>'),
+            array(100, 100, null, 0, null),
+            array(100, 100, null, 0, '<'),
+            array(100, 100, null, 0, '!'),
+            array(100, 100, null, 0, '^'),
+            array(100, 100, null, 0, '>'),
+            array(100, 100, null, -1, null),
+            array(100, 100, null, -1, '<'),
+            array(100, 100, null, -1, '!'),
+            array(100, 100, null, -1, '^'),
+            array(100, 100, null, -1, '>'),
+            array(100, 100, null, 1, null),
+            array(100, 100, null, 1, '<'),
+            array(100, 100, null, 1, '!'),
+            array(100, 100, null, 1, '^'),
+            array(100, 100, null, 1, '>'),
+            array(100, 100, 0, null, null),
+            array(100, 100, 0, null, '<'),
+            array(100, 100, 0, null, '!'),
+            array(100, 100, 0, null, '^'),
+            array(100, 100, 0, null, '>'),
+            array(100, 100, 0, 0, null),
+            array(100, 100, 0, 0, '<'),
+            array(100, 100, 0, 0, '!'),
+            array(100, 100, 0, 0, '^'),
+            array(100, 100, 0, 0, '>'),
+            array(100, 100, 0, -1, null),
+            array(100, 100, 0, -1, '<'),
+            array(100, 100, 0, -1, '!'),
+            array(100, 100, 0, -1, '^'),
+            array(100, 100, 0, -1, '>'),
+            array(100, 100, 0, 1, null),
+            array(100, 100, 0, 1, '<'),
+            array(100, 100, 0, 1, '!'),
+            array(100, 100, 0, 1, '^'),
+            array(100, 100, 0, 1, '>'),
+            array(100, 100, -1, null, null),
+            array(100, 100, -1, null, '<'),
+            array(100, 100, -1, null, '!'),
+            array(100, 100, -1, null, '^'),
+            array(100, 100, -1, null, '>'),
+            array(100, 100, -1, 0, null),
+            array(100, 100, -1, 0, '<'),
+            array(100, 100, -1, 0, '!'),
+            array(100, 100, -1, 0, '^'),
+            array(100, 100, -1, 0, '>'),
+            array(100, 100, -1, -1, null),
+            array(100, 100, -1, -1, '<'),
+            array(100, 100, -1, -1, '!'),
+            array(100, 100, -1, -1, '^'),
+            array(100, 100, -1, -1, '>'),
+            array(100, 100, -1, 1, null),
+            array(100, 100, -1, 1, '<'),
+            array(100, 100, -1, 1, '!'),
+            array(100, 100, -1, 1, '^'),
+            array(100, 100, -1, 1, '>'),
+            array(100, 100, 1, null, null),
+            array(100, 100, 1, null, '<'),
+            array(100, 100, 1, null, '!'),
+            array(100, 100, 1, null, '^'),
+            array(100, 100, 1, null, '>'),
+            array(100, 100, 1, 0, null),
+            array(100, 100, 1, 0, '<'),
+            array(100, 100, 1, 0, '!'),
+            array(100, 100, 1, 0, '^'),
+            array(100, 100, 1, 0, '>'),
+            array(100, 100, 1, -1, null),
+            array(100, 100, 1, -1, '<'),
+            array(100, 100, 1, -1, '!'),
+            array(100, 100, 1, -1, '^'),
+            array(100, 100, 1, -1, '>'),
+            array(100, 100, 1, 1, null),
+            array(100, 100, 1, 1, '<'),
+            array(100, 100, 1, 1, '!'),
+            array(100, 100, 1, 1, '^'),
+            array(100, 100, 1, 1, '>'))
+            ;
+    }
+
+    /**
+     * @dataProvider provideWrongGeometries
+     */
+    public function testWrongGeometry($width, $height, $x, $y, $aspectRatio)
+    {
+        $geometry = new Geometry($width, $height, $x, $y, $aspectRatio);
+
+        $expectedGeometry = Geometry::createFromParameters($width, $height, $x, $y, $aspectRatio);
+
+        $message = $validatedGeometry = null;
+
+        try {
+            $validatedGeometry = $geometry->validate();
+        } catch (\InvalidArgumentException $e) {
+            $message = $e->getMessage();
+        }
+
+        $this->assertNotNull($message, 'No exception for geometry "'.$expectedGeometry.'"');
+        $this->assertStringStartsWith('The specified geometry ('.$expectedGeometry.') is invalid.', $message, "Wrong exception message:\n$message");
+    }
+
+    public function provideWrongGeometries()
+    {
+        return array(
+            array(null, null, null, null, '<'),
+            array(null, null, null, null, '!'),
+            array(null, null, null, null, '^'),
+            array(null, null, null, null, '>'),
+            array(null, null, null, 0, '<'),
+            array(null, null, null, 0, '!'),
+            array(null, null, null, 0, '^'),
+            array(null, null, null, 0, '>'),
+            array(null, null, null, -1, '<'),
+            array(null, null, null, -1, '!'),
+            array(null, null, null, -1, '^'),
+            array(null, null, null, -1, '>'),
+            array(null, null, null, 1, '<'),
+            array(null, null, null, 1, '!'),
+            array(null, null, null, 1, '^'),
+            array(null, null, null, 1, '>'),
+            array(null, null, 0, null, '<'),
+            array(null, null, 0, null, '!'),
+            array(null, null, 0, null, '^'),
+            array(null, null, 0, null, '>'),
+            array(null, null, 0, 0, '<'),
+            array(null, null, 0, 0, '!'),
+            array(null, null, 0, 0, '^'),
+            array(null, null, 0, 0, '>'),
+            array(null, null, 0, -1, '<'),
+            array(null, null, 0, -1, '!'),
+            array(null, null, 0, -1, '^'),
+            array(null, null, 0, -1, '>'),
+            array(null, null, 0, 1, '<'),
+            array(null, null, 0, 1, '!'),
+            array(null, null, 0, 1, '^'),
+            array(null, null, 0, 1, '>'),
+            array(null, null, -1, null, '<'),
+            array(null, null, -1, null, '!'),
+            array(null, null, -1, null, '^'),
+            array(null, null, -1, null, '>'),
+            array(null, null, -1, 0, '<'),
+            array(null, null, -1, 0, '!'),
+            array(null, null, -1, 0, '^'),
+            array(null, null, -1, 0, '>'),
+            array(null, null, -1, -1, '<'),
+            array(null, null, -1, -1, '!'),
+            array(null, null, -1, -1, '^'),
+            array(null, null, -1, -1, '>'),
+            array(null, null, -1, 1, '<'),
+            array(null, null, -1, 1, '!'),
+            array(null, null, -1, 1, '^'),
+            array(null, null, -1, 1, '>'),
+            array(null, null, 1, null, '<'),
+            array(null, null, 1, null, '!'),
+            array(null, null, 1, null, '^'),
+            array(null, null, 1, null, '>'),
+            array(null, null, 1, 0, '<'),
+            array(null, null, 1, 0, '!'),
+            array(null, null, 1, 0, '^'),
+            array(null, null, 1, 0, '>'),
+            array(null, null, 1, -1, '<'),
+            array(null, null, 1, -1, '!'),
+            array(null, null, 1, -1, '^'),
+            array(null, null, 1, -1, '>'),
+            array(null, null, 1, 1, '<'),
+            array(null, null, 1, 1, '!'),
+            array(null, null, 1, 1, '^'),
+            array(null, null, 1, 1, '>'),
+            array(null, 0, null, null, null),
+            array(null, 0, null, null, '<'),
+            array(null, 0, null, null, '!'),
+            array(null, 0, null, null, '^'),
+            array(null, 0, null, null, '>'),
+            array(null, 0, null, 0, null),
+            array(null, 0, null, 0, '<'),
+            array(null, 0, null, 0, '!'),
+            array(null, 0, null, 0, '^'),
+            array(null, 0, null, 0, '>'),
+            array(null, 0, null, -1, null),
+            array(null, 0, null, -1, '<'),
+            array(null, 0, null, -1, '!'),
+            array(null, 0, null, -1, '^'),
+            array(null, 0, null, -1, '>'),
+            array(null, 0, null, 1, null),
+            array(null, 0, null, 1, '<'),
+            array(null, 0, null, 1, '!'),
+            array(null, 0, null, 1, '^'),
+            array(null, 0, null, 1, '>'),
+            array(null, 0, 0, null, null),
+            array(null, 0, 0, null, '<'),
+            array(null, 0, 0, null, '!'),
+            array(null, 0, 0, null, '^'),
+            array(null, 0, 0, null, '>'),
+            array(null, 0, 0, 0, null),
+            array(null, 0, 0, 0, '<'),
+            array(null, 0, 0, 0, '!'),
+            array(null, 0, 0, 0, '^'),
+            array(null, 0, 0, 0, '>'),
+            array(null, 0, 0, -1, null),
+            array(null, 0, 0, -1, '<'),
+            array(null, 0, 0, -1, '!'),
+            array(null, 0, 0, -1, '^'),
+            array(null, 0, 0, -1, '>'),
+            array(null, 0, 0, 1, null),
+            array(null, 0, 0, 1, '<'),
+            array(null, 0, 0, 1, '!'),
+            array(null, 0, 0, 1, '^'),
+            array(null, 0, 0, 1, '>'),
+            array(null, 0, -1, null, null),
+            array(null, 0, -1, null, '<'),
+            array(null, 0, -1, null, '!'),
+            array(null, 0, -1, null, '^'),
+            array(null, 0, -1, null, '>'),
+            array(null, 0, -1, 0, null),
+            array(null, 0, -1, 0, '<'),
+            array(null, 0, -1, 0, '!'),
+            array(null, 0, -1, 0, '^'),
+            array(null, 0, -1, 0, '>'),
+            array(null, 0, -1, -1, null),
+            array(null, 0, -1, -1, '<'),
+            array(null, 0, -1, -1, '!'),
+            array(null, 0, -1, -1, '^'),
+            array(null, 0, -1, -1, '>'),
+            array(null, 0, -1, 1, null),
+            array(null, 0, -1, 1, '<'),
+            array(null, 0, -1, 1, '!'),
+            array(null, 0, -1, 1, '^'),
+            array(null, 0, -1, 1, '>'),
+            array(null, 0, 1, null, null),
+            array(null, 0, 1, null, '<'),
+            array(null, 0, 1, null, '!'),
+            array(null, 0, 1, null, '^'),
+            array(null, 0, 1, null, '>'),
+            array(null, 0, 1, 0, null),
+            array(null, 0, 1, 0, '<'),
+            array(null, 0, 1, 0, '!'),
+            array(null, 0, 1, 0, '^'),
+            array(null, 0, 1, 0, '>'),
+            array(null, 0, 1, -1, null),
+            array(null, 0, 1, -1, '<'),
+            array(null, 0, 1, -1, '!'),
+            array(null, 0, 1, -1, '^'),
+            array(null, 0, 1, -1, '>'),
+            array(null, 0, 1, 1, null),
+            array(null, 0, 1, 1, '<'),
+            array(null, 0, 1, 1, '!'),
+            array(null, 0, 1, 1, '^'),
+            array(null, 0, 1, 1, '>'),
+            array(0, null, null, null, null),
+            array(0, null, null, null, '<'),
+            array(0, null, null, null, '!'),
+            array(0, null, null, null, '^'),
+            array(0, null, null, null, '>'),
+            array(0, null, null, 0, null),
+            array(0, null, null, 0, '<'),
+            array(0, null, null, 0, '!'),
+            array(0, null, null, 0, '^'),
+            array(0, null, null, 0, '>'),
+            array(0, null, null, -1, null),
+            array(0, null, null, -1, '<'),
+            array(0, null, null, -1, '!'),
+            array(0, null, null, -1, '^'),
+            array(0, null, null, -1, '>'),
+            array(0, null, null, 1, null),
+            array(0, null, null, 1, '<'),
+            array(0, null, null, 1, '!'),
+            array(0, null, null, 1, '^'),
+            array(0, null, null, 1, '>'),
+            array(0, null, 0, null, null),
+            array(0, null, 0, null, '<'),
+            array(0, null, 0, null, '!'),
+            array(0, null, 0, null, '^'),
+            array(0, null, 0, null, '>'),
+            array(0, null, 0, 0, null),
+            array(0, null, 0, 0, '<'),
+            array(0, null, 0, 0, '!'),
+            array(0, null, 0, 0, '^'),
+            array(0, null, 0, 0, '>'),
+            array(0, null, 0, -1, null),
+            array(0, null, 0, -1, '<'),
+            array(0, null, 0, -1, '!'),
+            array(0, null, 0, -1, '^'),
+            array(0, null, 0, -1, '>'),
+            array(0, null, 0, 1, null),
+            array(0, null, 0, 1, '<'),
+            array(0, null, 0, 1, '!'),
+            array(0, null, 0, 1, '^'),
+            array(0, null, 0, 1, '>'),
+            array(0, null, -1, null, null),
+            array(0, null, -1, null, '<'),
+            array(0, null, -1, null, '!'),
+            array(0, null, -1, null, '^'),
+            array(0, null, -1, null, '>'),
+            array(0, null, -1, 0, null),
+            array(0, null, -1, 0, '<'),
+            array(0, null, -1, 0, '!'),
+            array(0, null, -1, 0, '^'),
+            array(0, null, -1, 0, '>'),
+            array(0, null, -1, -1, null),
+            array(0, null, -1, -1, '<'),
+            array(0, null, -1, -1, '!'),
+            array(0, null, -1, -1, '^'),
+            array(0, null, -1, -1, '>'),
+            array(0, null, -1, 1, null),
+            array(0, null, -1, 1, '<'),
+            array(0, null, -1, 1, '!'),
+            array(0, null, -1, 1, '^'),
+            array(0, null, -1, 1, '>'),
+            array(0, null, 1, null, null),
+            array(0, null, 1, null, '<'),
+            array(0, null, 1, null, '!'),
+            array(0, null, 1, null, '^'),
+            array(0, null, 1, null, '>'),
+            array(0, null, 1, 0, null),
+            array(0, null, 1, 0, '<'),
+            array(0, null, 1, 0, '!'),
+            array(0, null, 1, 0, '^'),
+            array(0, null, 1, 0, '>'),
+            array(0, null, 1, -1, null),
+            array(0, null, 1, -1, '<'),
+            array(0, null, 1, -1, '!'),
+            array(0, null, 1, -1, '^'),
+            array(0, null, 1, -1, '>'),
+            array(0, null, 1, 1, null),
+            array(0, null, 1, 1, '<'),
+            array(0, null, 1, 1, '!'),
+            array(0, null, 1, 1, '^'),
+            array(0, null, 1, 1, '>'),
+            array(0, 0, null, null, null),
+            array(0, 0, null, null, '<'),
+            array(0, 0, null, null, '!'),
+            array(0, 0, null, null, '^'),
+            array(0, 0, null, null, '>'),
+            array(0, 0, null, 0, null),
+            array(0, 0, null, 0, '<'),
+            array(0, 0, null, 0, '!'),
+            array(0, 0, null, 0, '^'),
+            array(0, 0, null, 0, '>'),
+            array(0, 0, null, -1, null),
+            array(0, 0, null, -1, '<'),
+            array(0, 0, null, -1, '!'),
+            array(0, 0, null, -1, '^'),
+            array(0, 0, null, -1, '>'),
+            array(0, 0, null, 1, null),
+            array(0, 0, null, 1, '<'),
+            array(0, 0, null, 1, '!'),
+            array(0, 0, null, 1, '^'),
+            array(0, 0, null, 1, '>'),
+            array(0, 0, 0, null, null),
+            array(0, 0, 0, null, '<'),
+            array(0, 0, 0, null, '!'),
+            array(0, 0, 0, null, '^'),
+            array(0, 0, 0, null, '>'),
+            array(0, 0, 0, 0, null),
+            array(0, 0, 0, 0, '<'),
+            array(0, 0, 0, 0, '!'),
+            array(0, 0, 0, 0, '^'),
+            array(0, 0, 0, 0, '>'),
+            array(0, 0, 0, -1, null),
+            array(0, 0, 0, -1, '<'),
+            array(0, 0, 0, -1, '!'),
+            array(0, 0, 0, -1, '^'),
+            array(0, 0, 0, -1, '>'),
+            array(0, 0, 0, 1, null),
+            array(0, 0, 0, 1, '<'),
+            array(0, 0, 0, 1, '!'),
+            array(0, 0, 0, 1, '^'),
+            array(0, 0, 0, 1, '>'),
+            array(0, 0, -1, null, null),
+            array(0, 0, -1, null, '<'),
+            array(0, 0, -1, null, '!'),
+            array(0, 0, -1, null, '^'),
+            array(0, 0, -1, null, '>'),
+            array(0, 0, -1, 0, null),
+            array(0, 0, -1, 0, '<'),
+            array(0, 0, -1, 0, '!'),
+            array(0, 0, -1, 0, '^'),
+            array(0, 0, -1, 0, '>'),
+            array(0, 0, -1, -1, null),
+            array(0, 0, -1, -1, '<'),
+            array(0, 0, -1, -1, '!'),
+            array(0, 0, -1, -1, '^'),
+            array(0, 0, -1, -1, '>'),
+            array(0, 0, -1, 1, null),
+            array(0, 0, -1, 1, '<'),
+            array(0, 0, -1, 1, '!'),
+            array(0, 0, -1, 1, '^'),
+            array(0, 0, -1, 1, '>'),
+            array(0, 0, 1, null, null),
+            array(0, 0, 1, null, '<'),
+            array(0, 0, 1, null, '!'),
+            array(0, 0, 1, null, '^'),
+            array(0, 0, 1, null, '>'),
+            array(0, 0, 1, 0, null),
+            array(0, 0, 1, 0, '<'),
+            array(0, 0, 1, 0, '!'),
+            array(0, 0, 1, 0, '^'),
+            array(0, 0, 1, 0, '>'),
+            array(0, 0, 1, -1, null),
+            array(0, 0, 1, -1, '<'),
+            array(0, 0, 1, -1, '!'),
+            array(0, 0, 1, -1, '^'),
+            array(0, 0, 1, -1, '>'),
+            array(0, 0, 1, 1, null),
+            array(0, 0, 1, 1, '<'),
+            array(0, 0, 1, 1, '!'),
+            array(0, 0, 1, 1, '^'),
+            array(0, 0, 1, 1, '>'),
+            array(0, 100, null, null, null),
+            array(0, 100, null, null, '<'),
+            array(0, 100, null, null, '!'),
+            array(0, 100, null, null, '^'),
+            array(0, 100, null, null, '>'),
+            array(0, 100, null, 0, null),
+            array(0, 100, null, 0, '<'),
+            array(0, 100, null, 0, '!'),
+            array(0, 100, null, 0, '^'),
+            array(0, 100, null, 0, '>'),
+            array(0, 100, null, -1, null),
+            array(0, 100, null, -1, '<'),
+            array(0, 100, null, -1, '!'),
+            array(0, 100, null, -1, '^'),
+            array(0, 100, null, -1, '>'),
+            array(0, 100, null, 1, null),
+            array(0, 100, null, 1, '<'),
+            array(0, 100, null, 1, '!'),
+            array(0, 100, null, 1, '^'),
+            array(0, 100, null, 1, '>'),
+            array(0, 100, 0, null, null),
+            array(0, 100, 0, null, '<'),
+            array(0, 100, 0, null, '!'),
+            array(0, 100, 0, null, '^'),
+            array(0, 100, 0, null, '>'),
+            array(0, 100, 0, 0, null),
+            array(0, 100, 0, 0, '<'),
+            array(0, 100, 0, 0, '!'),
+            array(0, 100, 0, 0, '^'),
+            array(0, 100, 0, 0, '>'),
+            array(0, 100, 0, -1, null),
+            array(0, 100, 0, -1, '<'),
+            array(0, 100, 0, -1, '!'),
+            array(0, 100, 0, -1, '^'),
+            array(0, 100, 0, -1, '>'),
+            array(0, 100, 0, 1, null),
+            array(0, 100, 0, 1, '<'),
+            array(0, 100, 0, 1, '!'),
+            array(0, 100, 0, 1, '^'),
+            array(0, 100, 0, 1, '>'),
+            array(0, 100, -1, null, null),
+            array(0, 100, -1, null, '<'),
+            array(0, 100, -1, null, '!'),
+            array(0, 100, -1, null, '^'),
+            array(0, 100, -1, null, '>'),
+            array(0, 100, -1, 0, null),
+            array(0, 100, -1, 0, '<'),
+            array(0, 100, -1, 0, '!'),
+            array(0, 100, -1, 0, '^'),
+            array(0, 100, -1, 0, '>'),
+            array(0, 100, -1, -1, null),
+            array(0, 100, -1, -1, '<'),
+            array(0, 100, -1, -1, '!'),
+            array(0, 100, -1, -1, '^'),
+            array(0, 100, -1, -1, '>'),
+            array(0, 100, -1, 1, null),
+            array(0, 100, -1, 1, '<'),
+            array(0, 100, -1, 1, '!'),
+            array(0, 100, -1, 1, '^'),
+            array(0, 100, -1, 1, '>'),
+            array(0, 100, 1, null, null),
+            array(0, 100, 1, null, '<'),
+            array(0, 100, 1, null, '!'),
+            array(0, 100, 1, null, '^'),
+            array(0, 100, 1, null, '>'),
+            array(0, 100, 1, 0, null),
+            array(0, 100, 1, 0, '<'),
+            array(0, 100, 1, 0, '!'),
+            array(0, 100, 1, 0, '^'),
+            array(0, 100, 1, 0, '>'),
+            array(0, 100, 1, -1, null),
+            array(0, 100, 1, -1, '<'),
+            array(0, 100, 1, -1, '!'),
+            array(0, 100, 1, -1, '^'),
+            array(0, 100, 1, -1, '>'),
+            array(0, 100, 1, 1, null),
+            array(0, 100, 1, 1, '<'),
+            array(0, 100, 1, 1, '!'),
+            array(0, 100, 1, 1, '^'),
+            array(0, 100, 1, 1, '>'),
+            array(100, 0, null, null, null),
+            array(100, 0, null, null, '<'),
+            array(100, 0, null, null, '!'),
+            array(100, 0, null, null, '^'),
+            array(100, 0, null, null, '>'),
+            array(100, 0, null, 0, null),
+            array(100, 0, null, 0, '<'),
+            array(100, 0, null, 0, '!'),
+            array(100, 0, null, 0, '^'),
+            array(100, 0, null, 0, '>'),
+            array(100, 0, null, -1, null),
+            array(100, 0, null, -1, '<'),
+            array(100, 0, null, -1, '!'),
+            array(100, 0, null, -1, '^'),
+            array(100, 0, null, -1, '>'),
+            array(100, 0, null, 1, null),
+            array(100, 0, null, 1, '<'),
+            array(100, 0, null, 1, '!'),
+            array(100, 0, null, 1, '^'),
+            array(100, 0, null, 1, '>'),
+            array(100, 0, 0, null, null),
+            array(100, 0, 0, null, '<'),
+            array(100, 0, 0, null, '!'),
+            array(100, 0, 0, null, '^'),
+            array(100, 0, 0, null, '>'),
+            array(100, 0, 0, 0, null),
+            array(100, 0, 0, 0, '<'),
+            array(100, 0, 0, 0, '!'),
+            array(100, 0, 0, 0, '^'),
+            array(100, 0, 0, 0, '>'),
+            array(100, 0, 0, -1, null),
+            array(100, 0, 0, -1, '<'),
+            array(100, 0, 0, -1, '!'),
+            array(100, 0, 0, -1, '^'),
+            array(100, 0, 0, -1, '>'),
+            array(100, 0, 0, 1, null),
+            array(100, 0, 0, 1, '<'),
+            array(100, 0, 0, 1, '!'),
+            array(100, 0, 0, 1, '^'),
+            array(100, 0, 0, 1, '>'),
+            array(100, 0, -1, null, null),
+            array(100, 0, -1, null, '<'),
+            array(100, 0, -1, null, '!'),
+            array(100, 0, -1, null, '^'),
+            array(100, 0, -1, null, '>'),
+            array(100, 0, -1, 0, null),
+            array(100, 0, -1, 0, '<'),
+            array(100, 0, -1, 0, '!'),
+            array(100, 0, -1, 0, '^'),
+            array(100, 0, -1, 0, '>'),
+            array(100, 0, -1, -1, null),
+            array(100, 0, -1, -1, '<'),
+            array(100, 0, -1, -1, '!'),
+            array(100, 0, -1, -1, '^'),
+            array(100, 0, -1, -1, '>'),
+            array(100, 0, -1, 1, null),
+            array(100, 0, -1, 1, '<'),
+            array(100, 0, -1, 1, '!'),
+            array(100, 0, -1, 1, '^'),
+            array(100, 0, -1, 1, '>'),
+            array(100, 0, 1, null, null),
+            array(100, 0, 1, null, '<'),
+            array(100, 0, 1, null, '!'),
+            array(100, 0, 1, null, '^'),
+            array(100, 0, 1, null, '>'),
+            array(100, 0, 1, 0, null),
+            array(100, 0, 1, 0, '<'),
+            array(100, 0, 1, 0, '!'),
+            array(100, 0, 1, 0, '^'),
+            array(100, 0, 1, 0, '>'),
+            array(100, 0, 1, -1, null),
+            array(100, 0, 1, -1, '<'),
+            array(100, 0, 1, -1, '!'),
+            array(100, 0, 1, -1, '^'),
+            array(100, 0, 1, -1, '>'),
+            array(100, 0, 1, 1, null),
+            array(100, 0, 1, 1, '<'),
+            array(100, 0, 1, 1, '!'),
+            array(100, 0, 1, 1, '^'),
+            array(100, 0, 1, 1, '>'),
+        );
+    }
+}
diff --git a/Tests/ReferencesTest.php b/Tests/ReferencesTest.php
index ea26cb2..0467091 100644
--- a/Tests/ReferencesTest.php
+++ b/Tests/ReferencesTest.php
@@ -125,62 +125,4 @@ public function provideIncorrectColors()
         );
     }
 
-    /**
-     * @dataProvider provideCorrectGeometries
-     * @param string $geometry
-     */
-    public function testCorrectGeometries($geometry)
-    {
-        $exception = false;
-        try {
-            $checked = $this->ref->geometry($geometry);
-            $this->assertEquals($checked, trim($geometry));
-        } catch (\InvalidArgumentException $e) {
-            $exception = true;
-        }
-        $this->assertFalse($exception, sprintf("Failed in checking valid geometry (%s)", $geometry));
-    }
-
-    public function provideCorrectGeometries()
-    {
-        return array(
-            array('x100'),
-            array('100x100'),
-            array('100'),
-            array('+0+0'),
-            array('x100+0+0'),
-            array('100+0+0'),
-            array('100x100+0+0'),
-            array('100%x100%+0+0'),
-        );
-    }
-
-    /**
-     * @dataProvider provideIncorrectGeometries
-     * @param string $geometry
-     */
-    public function testIncorrectGeometries($geometry)
-    {
-        $msg = '';
-        try {
-            $this->ref->geometry($geometry);
-        } catch (\InvalidArgumentException $e) {
-            $msg = $e->getMessage();
-        }
-        $this->assertContains(
-            sprintf("The specified geometry (%s) is invalid", $geometry),
-            $msg
-        );
-    }
-
-    public function provideIncorrectGeometries()
-    {
-        return array(
-            array('100x'),
-            array('+0'),
-            array('x100+0'),
-            array('100%x100%+0'),
-        );
-    }
-
 }
diff --git a/Tests/bootstrap.php b/Tests/bootstrap.php
index e52fa3e..f0f43e0 100644
--- a/Tests/bootstrap.php
+++ b/Tests/bootstrap.php
@@ -42,3 +42,6 @@
         "in the global PATH variable, or that it is accessible in /usr/bin"
     );
 }
+
+echo "Analyzed ImageMagick directory: ".IMAGEMAGICK_DIR."\n";
+system(IMAGEMAGICK_DIR.'convert -version');