diff --git a/codeception.yml b/codeception.yml
new file mode 100644
index 0000000..32ed5c7
--- /dev/null
+++ b/codeception.yml
@@ -0,0 +1,16 @@
+paths:
+    tests: tests
+    output: tests/_output
+    data: tests/_data
+    support: tests/_support
+    envs: tests/_envs
+actor_suffix: Tester
+extensions:
+    enabled:
+        - Codeception\Extension\RunFailed
+
+coverage:
+    enabled: true
+    whitelist:
+        include:
+            - src/*
\ No newline at end of file
diff --git a/composer.json b/composer.json
index 5a38e21..e6bb31e 100644
--- a/composer.json
+++ b/composer.json
@@ -29,5 +29,10 @@
     "psr-4": {
       "ObjectivePHP\\Gateway\\MySql\\": "src/"
     }
+  },
+  "autoload-dev": {
+    "psr-4": {
+      "Test\\ObjectivePHP\\Gateway\\MySql\\": "tests/unit/"
+    }
   }
 }
diff --git a/composer.lock b/composer.lock
index 5b9a801..19d6fc4 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,6 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "hash": "4875cab9ddebd2342228c2682cefec93",
     "content-hash": "830f719fd3583ba377c5264e9924b489",
     "packages": [
         {
@@ -69,7 +68,7 @@
                 "sqlserver",
                 "update"
             ],
-            "time": "2016-10-03 20:34:56"
+            "time": "2016-10-03T20:34:56+00:00"
         },
         {
             "name": "container-interop/container-interop",
@@ -100,23 +99,243 @@
             ],
             "description": "Promoting the interoperability of container objects (DIC, SL, etc.)",
             "homepage": "https://github.com/container-interop/container-interop",
-            "time": "2017-02-14 19:40:03"
+            "time": "2017-02-14T19:40:03+00:00"
+        },
+        {
+            "name": "doctrine/annotations",
+            "version": "v1.4.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/doctrine/annotations.git",
+                "reference": "54cacc9b81758b14e3ce750f205a393d52339e97"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/doctrine/annotations/zipball/54cacc9b81758b14e3ce750f205a393d52339e97",
+                "reference": "54cacc9b81758b14e3ce750f205a393d52339e97",
+                "shasum": ""
+            },
+            "require": {
+                "doctrine/lexer": "1.*",
+                "php": "^5.6 || ^7.0"
+            },
+            "require-dev": {
+                "doctrine/cache": "1.*",
+                "phpunit/phpunit": "^5.7"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.4.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Doctrine\\Common\\Annotations\\": "lib/Doctrine/Common/Annotations"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Roman Borschel",
+                    "email": "roman@code-factory.org"
+                },
+                {
+                    "name": "Benjamin Eberlei",
+                    "email": "kontakt@beberlei.de"
+                },
+                {
+                    "name": "Guilherme Blanco",
+                    "email": "guilhermeblanco@gmail.com"
+                },
+                {
+                    "name": "Jonathan Wage",
+                    "email": "jonwage@gmail.com"
+                },
+                {
+                    "name": "Johannes Schmitt",
+                    "email": "schmittjoh@gmail.com"
+                }
+            ],
+            "description": "Docblock Annotations Parser",
+            "homepage": "http://www.doctrine-project.org",
+            "keywords": [
+                "annotations",
+                "docblock",
+                "parser"
+            ],
+            "time": "2017-02-24T16:22:25+00:00"
+        },
+        {
+            "name": "doctrine/lexer",
+            "version": "v1.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/doctrine/lexer.git",
+                "reference": "83893c552fd2045dd78aef794c31e694c37c0b8c"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/doctrine/lexer/zipball/83893c552fd2045dd78aef794c31e694c37c0b8c",
+                "reference": "83893c552fd2045dd78aef794c31e694c37c0b8c",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.2"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-0": {
+                    "Doctrine\\Common\\Lexer\\": "lib/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Roman Borschel",
+                    "email": "roman@code-factory.org"
+                },
+                {
+                    "name": "Guilherme Blanco",
+                    "email": "guilhermeblanco@gmail.com"
+                },
+                {
+                    "name": "Johannes Schmitt",
+                    "email": "schmittjoh@gmail.com"
+                }
+            ],
+            "description": "Base library for a lexer that can be used in Top-Down, Recursive Descent Parsers.",
+            "homepage": "http://www.doctrine-project.org",
+            "keywords": [
+                "lexer",
+                "parser"
+            ],
+            "time": "2014-09-09T13:34:57+00:00"
+        },
+        {
+            "name": "objective-php/config",
+            "version": "v1.0.6",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/objective-php/config.git",
+                "reference": "4a78526c7b2e66fa6c5daa06a3f6309855dc8269"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/objective-php/config/zipball/4a78526c7b2e66fa6c5daa06a3f6309855dc8269",
+                "reference": "4a78526c7b2e66fa6c5daa06a3f6309855dc8269",
+                "shasum": ""
+            },
+            "require": {
+                "objective-php/matcher": "1.*",
+                "objective-php/primitives": "1.*",
+                "php": ">=7.0.0"
+            },
+            "require-dev": {
+                "objective-php/phpunit-extension": "1.0",
+                "phpunit/phpunit": "5.*"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "ObjectivePHP\\Config\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "GPL-3.0"
+            ],
+            "authors": [
+                {
+                    "name": "Gauthier 'Rusty' Delamarre",
+                    "email": "gauthier@objective-php.org",
+                    "role": "lead"
+                }
+            ],
+            "description": "Config component for ObjectivePHP",
+            "homepage": "https://github.com/objective-php/config",
+            "keywords": [
+                "config",
+                "objective-php"
+            ],
+            "time": "2017-09-06T09:34:52+00:00"
+        },
+        {
+            "name": "objective-php/events-handler",
+            "version": "v1.0.7",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/objective-php/events-handler.git",
+                "reference": "4311aa5cce903de98d61cb4fb74c9abf6d44064a"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/objective-php/events-handler/zipball/4311aa5cce903de98d61cb4fb74c9abf6d44064a",
+                "reference": "4311aa5cce903de98d61cb4fb74c9abf6d44064a",
+                "shasum": ""
+            },
+            "require": {
+                "objective-php/matcher": "1.*",
+                "objective-php/primitives": "1.*",
+                "objective-php/services-factory": "^1.0",
+                "php": ">=7.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "5.*"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "ObjectivePHP\\Events\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "GPL-3.0"
+            ],
+            "authors": [
+                {
+                    "name": "Gauthier 'Rusty' Delamarre",
+                    "email": "gauthier@objective-php.org",
+                    "role": "lead"
+                }
+            ],
+            "description": "Events Handler for ObjectivePHP",
+            "homepage": "https://github.com/objective-php/events-handler",
+            "keywords": [
+                "events",
+                "events handler",
+                "objective php"
+            ],
+            "time": "2017-10-09T11:50:38+00:00"
         },
         {
             "name": "objective-php/gateway",
-            "version": "v1.0.0",
+            "version": "v1.0.5",
             "source": {
                 "type": "git",
                 "url": "https://github.com/objective-php/gateway.git",
-                "reference": "92573e6deaaf0304b8ece2b093b9c3b4b5658e99"
+                "reference": "b28b4fda2f57003f81a0d84d163bd0e8b6c919ec"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/objective-php/gateway/zipball/92573e6deaaf0304b8ece2b093b9c3b4b5658e99",
-                "reference": "92573e6deaaf0304b8ece2b093b9c3b4b5658e99",
+                "url": "https://api.github.com/repos/objective-php/gateway/zipball/b28b4fda2f57003f81a0d84d163bd0e8b6c919ec",
+                "reference": "b28b4fda2f57003f81a0d84d163bd0e8b6c919ec",
                 "shasum": ""
             },
             "require": {
+                "objective-php/events-handler": "^1.0",
                 "objective-php/notification": "^1.1.0",
                 "objective-php/primitives": "^1.3.6",
                 "php": ">=7.0",
@@ -156,7 +375,55 @@
                 "database",
                 "objective php"
             ],
-            "time": "2017-08-09 14:46:51"
+            "time": "2017-10-05T09:50:41+00:00"
+        },
+        {
+            "name": "objective-php/invokable",
+            "version": "v1.1.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/objective-php/invokable.git",
+                "reference": "aec03eea6e85f133e30182cf9ca03bb1c85da1c1"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/objective-php/invokable/zipball/aec03eea6e85f133e30182cf9ca03bb1c85da1c1",
+                "reference": "aec03eea6e85f133e30182cf9ca03bb1c85da1c1",
+                "shasum": ""
+            },
+            "require": {
+                "objective-php/primitives": "1.3.*",
+                "php": ">=7.0"
+            },
+            "require-dev": {
+                "objective-php/application": "dev-master",
+                "objective-php/components": "1.0.*",
+                "phpunit/phpunit": "5.*"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "ObjectivePHP\\Invokable\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "GPL-3.0"
+            ],
+            "authors": [
+                {
+                    "name": "Gauthier 'Rusty' Delamarre",
+                    "email": "gauthier@objective-php.org",
+                    "role": "lead"
+                }
+            ],
+            "description": "Objective PHP Invokable component",
+            "homepage": "https://github.com/objective-php/invokable",
+            "keywords": [
+                "invokable",
+                "objective php"
+            ],
+            "time": "2017-06-29T12:46:13+00:00"
         },
         {
             "name": "objective-php/matcher",
@@ -202,7 +469,7 @@
                 "matcher",
                 "objective php"
             ],
-            "time": "2016-05-05 13:13:34"
+            "time": "2016-05-05T13:13:34+00:00"
         },
         {
             "name": "objective-php/notification",
@@ -255,7 +522,7 @@
                 "components",
                 "objective php"
             ],
-            "time": "2017-04-26 16:31:48"
+            "time": "2017-04-26T16:31:48+00:00"
         },
         {
             "name": "objective-php/phpunit-extension",
@@ -300,20 +567,20 @@
                 "objective php",
                 "phpunit"
             ],
-            "time": "2016-05-05 12:55:53"
+            "time": "2016-05-05T12:55:53+00:00"
         },
         {
             "name": "objective-php/primitives",
-            "version": "v1.3.6",
+            "version": "v1.3.7",
             "source": {
                 "type": "git",
                 "url": "https://github.com/objective-php/primitives.git",
-                "reference": "a582360b8d5792b84ab443ce2a309d1a224dc737"
+                "reference": "7b6db199310dbfdd83be307ae33914a34fe8fd4b"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/objective-php/primitives/zipball/a582360b8d5792b84ab443ce2a309d1a224dc737",
-                "reference": "a582360b8d5792b84ab443ce2a309d1a224dc737",
+                "url": "https://api.github.com/repos/objective-php/primitives/zipball/7b6db199310dbfdd83be307ae33914a34fe8fd4b",
+                "reference": "7b6db199310dbfdd83be307ae33914a34fe8fd4b",
                 "shasum": ""
             },
             "require": {
@@ -348,13 +615,215 @@
                     "role": "dev"
                 }
             ],
-            "description": "Primitives classes for ObjectivePHP",
-            "homepage": "https://github.com/objective-php/primitives",
-            "keywords": [
-                "objective php",
-                "primitives"
+            "description": "Primitives classes for ObjectivePHP",
+            "homepage": "https://github.com/objective-php/primitives",
+            "keywords": [
+                "objective php",
+                "primitives"
+            ],
+            "time": "2017-09-04T12:32:58+00:00"
+        },
+        {
+            "name": "objective-php/services-factory",
+            "version": "v1.2.3",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/objective-php/services-factory.git",
+                "reference": "a85e2f6de94290e8a3b5249cc01906c7d9028be7"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/objective-php/services-factory/zipball/a85e2f6de94290e8a3b5249cc01906c7d9028be7",
+                "reference": "a85e2f6de94290e8a3b5249cc01906c7d9028be7",
+                "shasum": ""
+            },
+            "require": {
+                "container-interop/container-interop": "^1.1",
+                "doctrine/annotations": "*",
+                "objective-php/config": "~1.0.0",
+                "objective-php/invokable": "~1.1.1",
+                "objective-php/matcher": "~1.0.0",
+                "objective-php/primitives": "~1.3.0",
+                "php": ">=7.0",
+                "phpdocumentor/reflection-docblock": "*"
+            },
+            "require-dev": {
+                "objective-php/events-handler": "~1.0.0",
+                "objective-php/phpunit-extension": "~1.0.0",
+                "phpunit/phpunit": "5.*",
+                "zendframework/zend-servicemanager": "^2.7.6"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "ObjectivePHP\\ServicesFactory\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "GPL-3.0"
+            ],
+            "authors": [
+                {
+                    "name": "Gauthier 'Rusty' Delamarre",
+                    "email": "gauthier@objective-php.org",
+                    "role": "lead"
+                }
+            ],
+            "description": "Services container for Objective PHP",
+            "homepage": "https://github.com/objective-php/services-factory",
+            "keywords": [
+                "dependency injection",
+                "objective php",
+                "services"
+            ],
+            "time": "2017-08-07T10:17:14+00:00"
+        },
+        {
+            "name": "phpdocumentor/reflection-common",
+            "version": "1.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/phpDocumentor/ReflectionCommon.git",
+                "reference": "21bdeb5f65d7ebf9f43b1b25d404f87deab5bfb6"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/phpDocumentor/ReflectionCommon/zipball/21bdeb5f65d7ebf9f43b1b25d404f87deab5bfb6",
+                "reference": "21bdeb5f65d7ebf9f43b1b25d404f87deab5bfb6",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.5"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^4.6"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "phpDocumentor\\Reflection\\": [
+                        "src"
+                    ]
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Jaap van Otterdijk",
+                    "email": "opensource@ijaap.nl"
+                }
+            ],
+            "description": "Common reflection classes used by phpdocumentor to reflect the code structure",
+            "homepage": "http://www.phpdoc.org",
+            "keywords": [
+                "FQSEN",
+                "phpDocumentor",
+                "phpdoc",
+                "reflection",
+                "static analysis"
+            ],
+            "time": "2017-09-11T18:02:19+00:00"
+        },
+        {
+            "name": "phpdocumentor/reflection-docblock",
+            "version": "4.1.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/phpDocumentor/ReflectionDocBlock.git",
+                "reference": "2d3d238c433cf69caeb4842e97a3223a116f94b2"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/phpDocumentor/ReflectionDocBlock/zipball/2d3d238c433cf69caeb4842e97a3223a116f94b2",
+                "reference": "2d3d238c433cf69caeb4842e97a3223a116f94b2",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.0",
+                "phpdocumentor/reflection-common": "^1.0@dev",
+                "phpdocumentor/type-resolver": "^0.4.0",
+                "webmozart/assert": "^1.0"
+            },
+            "require-dev": {
+                "mockery/mockery": "^0.9.4",
+                "phpunit/phpunit": "^4.4"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "phpDocumentor\\Reflection\\": [
+                        "src/"
+                    ]
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Mike van Riel",
+                    "email": "me@mikevanriel.com"
+                }
+            ],
+            "description": "With this component, a library can provide support for annotations via DocBlocks or otherwise retrieve information that is embedded in a DocBlock.",
+            "time": "2017-08-30T18:51:59+00:00"
+        },
+        {
+            "name": "phpdocumentor/type-resolver",
+            "version": "0.4.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/phpDocumentor/TypeResolver.git",
+                "reference": "9c977708995954784726e25d0cd1dddf4e65b0f7"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/phpDocumentor/TypeResolver/zipball/9c977708995954784726e25d0cd1dddf4e65b0f7",
+                "reference": "9c977708995954784726e25d0cd1dddf4e65b0f7",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^5.5 || ^7.0",
+                "phpdocumentor/reflection-common": "^1.0"
+            },
+            "require-dev": {
+                "mockery/mockery": "^0.9.4",
+                "phpunit/phpunit": "^5.2||^4.8.24"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "phpDocumentor\\Reflection\\": [
+                        "src/"
+                    ]
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Mike van Riel",
+                    "email": "me@mikevanriel.com"
+                }
             ],
-            "time": "2017-07-04 10:02:19"
+            "time": "2017-07-14T14:27:02+00:00"
         },
         {
             "name": "psr/container",
@@ -403,7 +872,57 @@
                 "container-interop",
                 "psr"
             ],
-            "time": "2017-02-14 16:28:37"
+            "time": "2017-02-14T16:28:37+00:00"
+        },
+        {
+            "name": "webmozart/assert",
+            "version": "1.2.0",
+            "source": {
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-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
-                {
-                    "name": "Bernhard Schussek",
-                    "email": "bschussek@gmail.com"
-                }
-            ],
-            "description": "Assertions to validate method input/output with nice error messages.",
-            "keywords": [
-                "assert",
-                "check",
-                "validate"
-            ],
-            "time": "2016-11-23 20:04:58"
+            "time": "2017-04-07T12:08:54+00:00"
         }
     ],
     "aliases": [],
diff --git a/src/AbstractMySqlGateway.php b/src/AbstractMySqlGateway.php
index f93a6c8..6ce67b1 100644
--- a/src/AbstractMySqlGateway.php
+++ b/src/AbstractMySqlGateway.php
@@ -31,7 +31,7 @@
 abstract class AbstractMySqlGateway extends AbstractPaginableGateway
 {
     /**
-     * @var Link[]
+     * @var Link[][]
      */
     protected $links;
 
@@ -59,7 +59,7 @@ public function getLinks($method = self::ALL)
         $links = [];
 
         foreach ($this->links as $key => $pool) {
-            if ($method & $key) {
+            if ($method & $key && $key >= $method) {
                 /** @var Link $link */
                 foreach ($pool as $link) {
                     if ($link->runFilters()) {
diff --git a/src/Link.php b/src/Link.php
index cfcafe1..0cf80c8 100644
--- a/src/Link.php
+++ b/src/Link.php
@@ -1,11 +1,11 @@
 <?php
 
-namespace ObjectivePHP\Gateway\Mysql;
+namespace ObjectivePHP\Gateway\MySql;
 
 /**
  * Class Link
  *
- * @package ObjectivePHP\Gateway\Mysql
+ * @package ObjectivePHP\Gateway\MySql
  */
 class Link
 {
diff --git a/tests/_data/.gitkeep b/tests/_data/.gitkeep
new file mode 100644
index 0000000..e69de29
diff --git a/tests/_support/AcceptanceTester.php b/tests/_support/AcceptanceTester.php
new file mode 100644
index 0000000..4c7dcbb
--- /dev/null
+++ b/tests/_support/AcceptanceTester.php
@@ -0,0 +1,26 @@
+<?php
+
+
+/**
+ * Inherited Methods
+ * @method void wantToTest($text)
+ * @method void wantTo($text)
+ * @method void execute($callable)
+ * @method void expectTo($prediction)
+ * @method void expect($prediction)
+ * @method void amGoingTo($argumentation)
+ * @method void am($role)
+ * @method void lookForwardTo($achieveValue)
+ * @method void comment($description)
+ * @method \Codeception\Lib\Friend haveFriend($name, $actorClass = NULL)
+ *
+ * @SuppressWarnings(PHPMD)
+*/
+class AcceptanceTester extends \Codeception\Actor
+{
+    use _generated\AcceptanceTesterActions;
+
+   /**
+    * Define custom actions here
+    */
+}
diff --git a/tests/_support/FunctionalTester.php b/tests/_support/FunctionalTester.php
new file mode 100644
index 0000000..7e888f8
--- /dev/null
+++ b/tests/_support/FunctionalTester.php
@@ -0,0 +1,26 @@
+<?php
+
+
+/**
+ * Inherited Methods
+ * @method void wantToTest($text)
+ * @method void wantTo($text)
+ * @method void execute($callable)
+ * @method void expectTo($prediction)
+ * @method void expect($prediction)
+ * @method void amGoingTo($argumentation)
+ * @method void am($role)
+ * @method void lookForwardTo($achieveValue)
+ * @method void comment($description)
+ * @method \Codeception\Lib\Friend haveFriend($name, $actorClass = NULL)
+ *
+ * @SuppressWarnings(PHPMD)
+*/
+class FunctionalTester extends \Codeception\Actor
+{
+    use _generated\FunctionalTesterActions;
+
+   /**
+    * Define custom actions here
+    */
+}
diff --git a/tests/_support/Helper/Acceptance.php b/tests/_support/Helper/Acceptance.php
new file mode 100644
index 0000000..65b9421
--- /dev/null
+++ b/tests/_support/Helper/Acceptance.php
@@ -0,0 +1,10 @@
+<?php
+namespace Helper;
+
+// here you can define custom actions
+// all public methods declared in helper class will be available in $I
+
+class Acceptance extends \Codeception\Module
+{
+
+}
diff --git a/tests/_support/Helper/Functional.php b/tests/_support/Helper/Functional.php
new file mode 100644
index 0000000..4183cb0
--- /dev/null
+++ b/tests/_support/Helper/Functional.php
@@ -0,0 +1,10 @@
+<?php
+namespace Helper;
+
+// here you can define custom actions
+// all public methods declared in helper class will be available in $I
+
+class Functional extends \Codeception\Module
+{
+
+}
diff --git a/tests/_support/Helper/Unit.php b/tests/_support/Helper/Unit.php
new file mode 100644
index 0000000..6064d37
--- /dev/null
+++ b/tests/_support/Helper/Unit.php
@@ -0,0 +1,10 @@
+<?php
+namespace Helper;
+
+// here you can define custom actions
+// all public methods declared in helper class will be available in $I
+
+class Unit extends \Codeception\Module
+{
+
+}
diff --git a/tests/_support/UnitTester.php b/tests/_support/UnitTester.php
new file mode 100644
index 0000000..2835357
--- /dev/null
+++ b/tests/_support/UnitTester.php
@@ -0,0 +1,26 @@
+<?php
+
+
+/**
+ * Inherited Methods
+ * @method void wantToTest($text)
+ * @method void wantTo($text)
+ * @method void execute($callable)
+ * @method void expectTo($prediction)
+ * @method void expect($prediction)
+ * @method void amGoingTo($argumentation)
+ * @method void am($role)
+ * @method void lookForwardTo($achieveValue)
+ * @method void comment($description)
+ * @method \Codeception\Lib\Friend haveFriend($name, $actorClass = NULL)
+ *
+ * @SuppressWarnings(PHPMD)
+*/
+class UnitTester extends \Codeception\Actor
+{
+    use _generated\UnitTesterActions;
+
+   /**
+    * Define custom actions here
+    */
+}
diff --git a/tests/_support/_generated/.gitignore b/tests/_support/_generated/.gitignore
new file mode 100644
index 0000000..c96a04f
--- /dev/null
+++ b/tests/_support/_generated/.gitignore
@@ -0,0 +1,2 @@
+*
+!.gitignore
\ No newline at end of file
diff --git a/tests/acceptance.suite.yml b/tests/acceptance.suite.yml
new file mode 100644
index 0000000..bb977c4
--- /dev/null
+++ b/tests/acceptance.suite.yml
@@ -0,0 +1,12 @@
+# Codeception Test Suite Configuration
+#
+# Suite for acceptance tests.
+# Perform tests in browser using the WebDriver or PhpBrowser.
+# If you need both WebDriver and PHPBrowser tests - create a separate suite.
+
+actor: AcceptanceTester
+modules:
+    enabled:
+        - PhpBrowser:
+            url: http://localhost/myapp
+        - \Helper\Acceptance
\ No newline at end of file
diff --git a/tests/functional.suite.yml b/tests/functional.suite.yml
new file mode 100644
index 0000000..94c1fe2
--- /dev/null
+++ b/tests/functional.suite.yml
@@ -0,0 +1,12 @@
+# Codeception Test Suite Configuration
+#
+# Suite for functional tests
+# Emulate web requests and make application process them
+# Include one of framework modules (Symfony2, Yii2, Laravel5) to use it
+# Remove this suite if you don't use frameworks
+
+actor: FunctionalTester
+modules:
+    enabled:
+        # add a framework module here
+        - \Helper\Functional
\ No newline at end of file
diff --git a/tests/unit.suite.yml b/tests/unit.suite.yml
new file mode 100644
index 0000000..026c91d
--- /dev/null
+++ b/tests/unit.suite.yml
@@ -0,0 +1,9 @@
+# Codeception Test Suite Configuration
+#
+# Suite for unit or integration tests.
+
+actor: UnitTester
+modules:
+    enabled:
+        - Asserts
+        - \Helper\Unit
\ No newline at end of file
diff --git a/tests/unit/AbstractMySqlGatewayTest.php b/tests/unit/AbstractMySqlGatewayTest.php
new file mode 100644
index 0000000..8abfbe6
--- /dev/null
+++ b/tests/unit/AbstractMySqlGatewayTest.php
@@ -0,0 +1,248 @@
+<?php
+
+namespace Test\ObjectivePHP\Gateway\MySql;
+
+use Codeception\Test\Unit;
+use ObjectivePHP\Gateway\MySql\Exception\MySqlGatewayException;
+use ObjectivePHP\Gateway\MySql\Link;
+use ObjectivePHP\Gateway\MySql\AbstractMySqlGateway;
+use ObjectivePHP\Gateway\ResultSet\Descriptor\ResultSetDescriptor;
+use ObjectivePHP\Gateway\ResultSet\ResultSet;
+use ObjectivePHP\Gateway\ResultSet\ResultSetInterface;
+
+class AbstractMySqlGatewayTest extends Unit
+{
+    use MySqlGatewayTestTrait;
+
+    /**
+     * @return AbstractMySqlGateway|__anonymous@305
+     */
+    public function createAbstractMySqlGateway()
+    {
+        return new class extends AbstractMySqlGateway
+        {
+
+        };
+    }
+
+    /**
+     * @param $method
+     * @param \callable[] ...$filters
+     *
+     * @dataProvider linkProvider
+     */
+    public function testRegisterLink($method = AbstractMySqlGateway::ALL, callable ...$filters)
+    {
+        $link = $this->createMysqlMock();
+        $instance = $this->createAbstractMySqlGateway();
+
+        $instance->registerLink($link, $method, ...$filters);
+        $instance->registerLink($link, $method, ...$filters);
+
+        $this->assertAttributeEquals(
+            [$method => [
+                new Link($link, ...$filters),
+                new Link($link, ...$filters),
+            ]],
+            'links',
+            $instance
+        );
+    }
+
+    /**
+     * @return array
+     */
+    public function listMethods()
+    {
+        return [
+            'method AbstractMySqlGateway::FETCH'     => [AbstractMySqlGateway::FETCH],
+            'method AbstractMySqlGateway::FETCH_ONE' => [AbstractMySqlGateway::FETCH_ONE],
+            'method AbstractMySqlGateway::FETCH_ALL' => [AbstractMySqlGateway::FETCH_ALL],
+            'method AbstractMySqlGateway::PERSIST'   => [AbstractMySqlGateway::PERSIST],
+            'method AbstractMySqlGateway::UPDATE'    => [AbstractMySqlGateway::UPDATE],
+            'method AbstractMySqlGateway::DELETE'    => [AbstractMySqlGateway::DELETE],
+            'method AbstractMySqlGateway::PURGE'     => [AbstractMySqlGateway::PURGE],
+            'method AbstractMySqlGateway::WRITE'     => [AbstractMySqlGateway::WRITE],
+            'method AbstractMySqlGateway::READ'      => [AbstractMySqlGateway::READ],
+            'method AbstractMySqlGateway::ALL'       => [AbstractMySqlGateway::ALL],
+        ];
+    }
+    /**
+     * @return array
+     */
+    public function linkProvider()
+    {
+        $filter = $this->filtersProvider()['trueFilter'][0];
+
+        $linksData = $this->listMethods();
+
+        $linksData['default'] = [];
+
+        // note that it seems no direct validation of any method existence is done.
+        $linksData['128 is an invalid value but alas it works !!'] = [128];
+        $linksData['a text string, invalid value, works again!!'] = ['whatever compiles!'];
+
+        $linksData['AbstractMySqlGateway::FETCH + filter']  = [AbstractMySqlGateway::FETCH, $filter];
+        $linksData['AbstractMySqlGateway::FETCH + filters'] = [AbstractMySqlGateway::FETCH, $filter, $filter, $filter];
+
+        return $linksData;
+    }
+
+    /**
+     * Target is to "filter" registered Links according to their registration methods and researched method
+     *
+     * Due to extensive tests on Link class,
+     * they will be given either 0 or 1 filter, giving when calling runFilters():
+     *  - true  (no filter),
+     *  - true  (true return callable),
+     *  - false (false return callable)
+     *
+     * The FILTER part is a sanity check for their proper integration in AbstractMysqlGateway
+     *
+     * With a Gateway populated with Links, method -> filterResult:
+     *  - PERSIST -> true
+     *  - FETCH_ONE -> false
+     *  - FETCH_ALL -> true (no filter)
+     *  - READ -> false
+     *  - READ -> true
+     *  - READ -> true (no filter)
+     *
+     * Expected output should be, method -> count :
+     *  - PERSIST -> 1
+     *  - READ -> 2 (RE
+     *  - FETCH_ALL -> 3 (FETCH_ALL , READ *2)
+     *  - any other -> 0
+     */
+    public function getLinksProvider()
+    {
+        $instance = $this->createAbstractMySqlGateway();
+
+        $linksProviderData = array_map(function($array) use ($instance) {
+            $array[] = $instance;
+            $array[] = [];
+            return $array;
+        }, $this->listMethods());
+
+        $trueFilter = function() {
+            return true;
+        };
+        $falseFilter = function() {
+            return false;
+        };
+
+        $linksData = [
+            'PERSIST' => [
+                'methodName' => 'method AbstractMySqlGateway::PERSIST',
+                'methodId' => AbstractMySqlGateway::PERSIST,
+                'filter' => $trueFilter,
+            ],
+            'FETCH_ONE_false' => [
+                'methodName' => 'method AbstractMySqlGateway::FETCH_ONE',
+                'methodId' => AbstractMySqlGateway::FETCH_ONE,
+                'filter' => $falseFilter,
+            ],
+            'FETCH_ALL' => [
+                'methodName' => 'method AbstractMySqlGateway::FETCH_ALL',
+                'methodId' => AbstractMySqlGateway::FETCH_ALL,
+            ],
+            'READ_true' => [
+                'methodName' => 'method AbstractMySqlGateway::READ',
+                'methodId' => AbstractMySqlGateway::READ,
+                'filter' => $trueFilter,
+            ],
+            'READ_false' => [
+                'methodName' => 'method AbstractMySqlGateway::READ',
+                'methodId' => AbstractMySqlGateway::READ,
+                'filter' => $falseFilter,
+            ],
+            'READ' => [
+                'methodName' => 'method AbstractMySqlGateway::READ',
+                'methodId' => AbstractMySqlGateway::READ,
+            ],
+        ];
+
+        // preparing mysqli connection according to specs above.
+        $mysqlis = [];
+        foreach ($linksData as $key => $data) {
+            $mysqlis[$key] = $this->createMysqlMock()->setConnectionIdentifier($data['methodName']);
+            if (isset($data['filter'])) {
+                $instance->registerLink($mysqlis[$key], $data['methodId'], $data['filter']);
+            } else {
+                $instance->registerLink($mysqlis[$key], $data['methodId']);
+            }
+        }
+
+        // updating expected elements according to spec above
+        $linksProviderData['method AbstractMySqlGateway::PERSIST'][2]   = $this->extractIdentifiers([
+            $mysqlis['PERSIST']
+        ]);
+        $linksProviderData['method AbstractMySqlGateway::FETCH_ALL'][2] = $this->extractIdentifiers([
+            $mysqlis['FETCH_ALL'],
+            $mysqlis['READ_true'],
+            $mysqlis['READ']
+        ]);
+        $linksProviderData['method AbstractMySqlGateway::READ'][2]      = $this->extractIdentifiers([
+            $mysqlis['READ_true'],
+            $mysqlis['READ']
+        ]);
+        $linksProviderData['method AbstractMySqlGateway::FETCH_ONE'][2] = $this->extractIdentifiers([
+            $mysqlis['READ_true'], $mysqlis['READ']
+        ]);
+        $linksProviderData['method AbstractMySqlGateway::FETCH'][2]     = $this->extractIdentifiers([
+            $mysqlis['READ_true'],
+            $mysqlis['READ']
+        ]);
+
+        return $linksProviderData;
+    }
+
+    /**
+     * It seems some magical cloning happens when dealing with dataProviders,
+     * and \mysqli being uncloneable (its mocks && extension altogether),
+     * the only 'same' assert can be done on an identifying property
+     *
+     * @param $method
+     * @param AbstractMySqlGateway $instance
+     * @param array $foundLinks
+     * @dataProvider getLinksProvider
+     */
+    public function testGetLinks($method = AbstractMySqlGateway::ALL, $instance, array $foundLinks = [])
+    {
+        $this->assertSame($foundLinks, $this->extractIdentifiers($instance->getLinks($method)));
+    }
+
+    public function testFetch()
+    {
+        $this->expectException(MySqlGatewayException::class);
+        $this->createAbstractMySqlGateway()->fetch(new ResultSetDescriptor(''));
+    }
+
+    public function testPurge()
+    {
+        $this->expectException(MySqlGatewayException::class);
+        $this->createAbstractMySqlGateway()->purge(new ResultSetDescriptor(''));
+    }
+
+    public function testFetchAll()
+    {
+
+        $queryMockedGateway = $this->getMockBuilder(AbstractMySqlGateway::class)
+            ->setMethods(['query'])
+            ->getMock();
+
+        /**
+         * @var AbstractMySqlGateway $queryMockedGateway
+         */
+        $queryMockedGateway->registerLink($this->createMysqlMock(), AbstractMySqlGateway::READ);
+
+        $baseRDS = (new ResultSetDescriptor('elements'))
+            ->addFilter('external_reference', 42);
+
+        $queryMockedGateway
+            ->expects($this->once())
+            ->method('query')
+            ->willReturn(new ResultSet());
+
+        $this->assertInstanceOf(ResultSetInterface::class, $queryMockedGateway->fetchAll($baseRDS));
+    }
+}
diff --git a/tests/unit/IdentifiableMySqli.php b/tests/unit/IdentifiableMySqli.php
new file mode 100644
index 0000000..cc515ad
--- /dev/null
+++ b/tests/unit/IdentifiableMySqli.php
@@ -0,0 +1,27 @@
+<?php
+
+namespace Test\ObjectivePHP\Gateway\MySql;
+
+
+class IdentifiableMySqli extends \mysqli
+{
+    protected $connectionIdentifier;
+
+    /**
+     * @return mixed
+     */
+    public function getConnectionIdentifier()
+    {
+        return $this->connectionIdentifier;
+    }
+
+    /**
+     * @param mixed $connectionIdentifier
+     * @return IdentifiableMySqli
+     */
+    public function setConnectionIdentifier($connectionIdentifier)
+    {
+        $this->connectionIdentifier = $connectionIdentifier;
+        return $this;
+    }
+}
\ No newline at end of file
diff --git a/tests/unit/LinkTest.php b/tests/unit/LinkTest.php
new file mode 100644
index 0000000..1f148f8
--- /dev/null
+++ b/tests/unit/LinkTest.php
@@ -0,0 +1,64 @@
+<?php
+
+namespace Test\ObjectivePHP\Gateway\MySql;
+
+use Codeception\Test\Unit;
+use ObjectivePHP\Gateway\MySql\Link;
+
+class LinkTest extends Unit
+{
+    use MySqlGatewayTestTrait;
+
+    /**
+     * @param callable[] ...$filters
+     * @dataProvider filtersProvider
+     */
+    public function testConstruct(callable ...$filters)
+    {
+        $mysqli = $this->createMysqlMock();
+
+        $link = new Link($mysqli, ...$filters);
+        $this->assertSame($mysqli, $link->getLink());
+        $this->assertSame($filters, $link->getFilters());
+    }
+
+    /**
+     * @param callable[] ...$filters
+     * @dataProvider filtersProvider
+     */
+    public function testGettersSetters(callable ...$filters)
+    {
+        $link = new Link($this->createMysqlMock());
+
+        $anotherMysqli = $this->createMysqlMock();
+        $this->assertSame($anotherMysqli, $link->setLink($anotherMysqli)->getLink());
+        $this->assertEquals([], $link->getFilters());
+
+        $link->setFilters($filters);
+        $this->assertSame($filters, $link->getFilters());
+
+    }
+
+    /**
+     * @param callable[] $filters
+     * @param $expectedValue
+     * @dataProvider filtersRunResultsProvider
+     */
+    public function testRunFilters($filters, $expectedValue)
+    {
+        $this->assertEquals($expectedValue, (new Link($this->createMysqlMock(), ...$filters))->runFilters());
+    }
+
+    public function filtersRunResultsProvider()
+    {
+        $filters = $this->filtersProvider();
+        $expected = [
+            'noFilters'       => [$filters['noFilters'], true],
+            'trueFilter'      => [$filters['trueFilter'], true],
+            'falseFilter'     => [$filters['falseFilter'], false],
+            'trueFalseFilter' => [$filters['trueFalseFilter'], false],
+            'falseTrueFilter' => [$filters['falseTrueFilter'], false],
+        ];
+        return $expected;
+    }
+}
diff --git a/tests/unit/MySqlGatewayTestTrait.php b/tests/unit/MySqlGatewayTestTrait.php
new file mode 100644
index 0000000..c29dc41
--- /dev/null
+++ b/tests/unit/MySqlGatewayTestTrait.php
@@ -0,0 +1,68 @@
+<?php
+
+namespace Test\ObjectivePHP\Gateway\MySql;
+
+/**
+ * Class MySqlGatewayTestTrait
+ * @package Test\ObjectivePHP\Gateway\MySql
+ */
+trait MySqlGatewayTestTrait
+{
+    /**
+     * @return \PHPUnit_Framework_MockObject_MockObject
+     */
+    public function createMysqlMock()
+    {
+        $mock = $this->getMockBuilder(IdentifiableMySqli::class)
+            ->disableOriginalConstructor()
+            ->setMethodsExcept(['getConnectionIdentifier', 'setConnectionIdentifier'])
+            ->getMock();
+
+        return $mock;
+    }
+
+    /**
+     * @return callable[][]
+     */
+    public function filtersProvider() : array
+    {
+        $trueFilter = function() {
+            return true;
+        };
+        $falseFilter = function() {
+            return false;
+        };
+        return [
+            'noFilters' => [
+            ],
+            'trueFilter' => [
+                $trueFilter,
+            ],
+            'falseFilter' => [
+                $falseFilter,
+            ],
+            'trueFalseFilter' => [
+                $trueFilter,
+                $falseFilter,
+            ],
+            'falseTrueFilter' => [
+                $falseFilter,
+                $trueFilter,
+            ],
+        ];
+    }
+
+    /**
+     * @param IdentifiableMySqli[] $mysqlis
+     * @return string[]
+     */
+    public function extractIdentifiers($mysqlis) :array
+    {
+        return array_map(function($mysqli) {
+            /**
+             * @var IdentifiableMySqli $mysqli
+             */
+            return $mysqli->getConnectionIdentifier();
+        }, $mysqlis);
+    }
+}