diff --git a/build/api/core/Checker.php b/build/api/core/Checker.php
index d46ed15..fa786dd 100644
--- a/build/api/core/Checker.php
+++ b/build/api/core/Checker.php
@@ -48,12 +48,15 @@
 
 			/* [2] Si de type ARRAY(type_elements)
 			=========================================================*/
-			if( preg_match('/^array<(.+)>$/', $type, $match) ){
+			if( preg_match('/^array(?:<(.+)>)?$/', $type, $match) ){
 
 				// Si c'est pas un tableau on retourne une erreur
 				if( !is_array($value) )
 					return false;
 
+				// Si c'est un tableau et que 'array' recu
+				if( $type == 'array' )
+					return true;
 
 				$elements_type = $match[1];
 
@@ -78,7 +81,7 @@
 
 				// Entier positif (id dans BDD)
 				case 'id':
-					return $checker && is_numeric($value) && $value <= 2147483647 && $value >= 0;
+					return $checker && is_numeric($value) && intval($value) == $value && $value <= 2147483647 && $value >= 0;
 					break;
 
 				// String quelconque (peut etre vide)
@@ -92,7 +95,7 @@
 
 				// Hash sha1/md5
 				case 'hash':
-					return $checker && is_string($value) && preg_match('/^[\da-f]+$/i', $value) && (strlen($value) == 64 || strlen($value) == 128);
+					return $checker && is_string($value) && preg_match('/^[\da-f]+$/i', $value) && in_array(strlen($value), [64,128]);
 					break;
 
 				case 'alphanumeric':
@@ -104,7 +107,7 @@
 					break;
 
 				case 'status':
-					return $checker && is_numeric($value) && floor($value) == $value && $value >= 0 && $value <= 100;
+					return $checker && is_numeric($value) && intval($value) == $value && $value >= 0 && $value <= 100;
 					break;
 
 				case 'rfid':
diff --git a/spec/build/api/core/CheckerSpec.php b/spec/build/api/core/CheckerSpec.php
index 74ae886..cbd3f79 100644
--- a/spec/build/api/core/CheckerSpec.php
+++ b/spec/build/api/core/CheckerSpec.php
@@ -12,7 +12,7 @@
 				---------------------------------------------------------*/
 				context('* unknown type', function(){
 
-					it('do not pass unknown type with any value', function(){
+					it('fail with any value', function(){
 
 						expect(Checker::run('unknown_type', 'someString'   ))->toBeFalsy();
 						expect(Checker::run('unknown_type', 123            ))->toBeFalsy();
@@ -30,7 +30,7 @@
 				---------------------------------------------------------*/
 				context('* mixed', function(){
 
-					it('pass type="mixed" with any type', function(){
+					it('pass with any type', function(){
 
 						expect(Checker::run('mixed', 'someString'   ))->toBeTruthy();
 						expect(Checker::run('mixed', 123            ))->toBeTruthy();
@@ -41,7 +41,7 @@
 
 					});
 
-					it('do not pass type="mixed" with null', function(){
+					it('fail with null', function(){
 
 						expect(Checker::run('mixed', null))->toBeFalsy();
 
@@ -53,28 +53,53 @@
 				---------------------------------------------------------*/
 				context('* id', function(){
 
-					it('pass type="id" whith any integer number (string or int)', function(){
+					it('pass when numeric (int or string)', function(){
 
-						expect(Checker::run('id', '123'          ))->toBeTruthy();
-						expect(Checker::run('id', 123            ))->toBeTruthy();
+						$int    = 12;
+						$string = '12';
+
+						expect($int)->toBeA('int');
+						expect(Checker::run('id', $int))->toBeTruthy();
+
+						expect($string)->toBeA('string');
+						expect(Checker::run('id', $string))->toBeTruthy();
 
 					});
 
-					it('do not pass type="id" whith decimal value (string or int)', function(){
+					it('pass when decimal with 0 as decimal part (double or string)', function(){
 
-						expect(Checker::run('id', '1.23' ))->toBeFalsy();
-						expect(Checker::run('id', 1.23   ))->toBeFalsy();
+						$int    = 12.0;
+						$string = '12.0';
+
+						expect($int)->toBeA('double');
+						expect(Checker::run('id', $int))->toBeTruthy();
+
+						expect($string)->toBeA('string');
+						expect(Checker::run('id', $string))->toBeTruthy();
 
 					});
 
-					it('pass type="id" whith boundaries', function(){
+					it('fail when decimal (double or string)', function(){
+
+						$int    = 12.5;
+						$string = '12.5';
+
+						expect($int)->toBeA('double');
+						expect(Checker::run('id', $int))->toBeFalsy();
+
+						expect($string)->toBeA('string');
+						expect(Checker::run('id', $string))->toBeFalsy();
+
+					});
+
+					it('pass at boundaries', function(){
 
 						expect(Checker::run('id', 0          ))->toBeTruthy();
 						expect(Checker::run('id', 2147483647 ))->toBeTruthy();
 
 					});
 
-					it('do not pass type="id" whith not match out-of-boundaries', function(){
+					it('fail with out-of-boundaries', function(){
 
 						expect(Checker::run('id', 0-1          ))->toBeFalsy();
 						expect(Checker::run('id', 2147483647+1 ))->toBeFalsy();
@@ -87,14 +112,14 @@
 				---------------------------------------------------------*/
 				context('* text', function(){
 
-					it('pass type="text" with any string', function(){
+					it('pass with any string', function(){
 
 						expect(Checker::run('text', '123'       ))->toBeTruthy();
 						expect(Checker::run('text', '123'.'123' ))->toBeTruthy();
 
 					});
 
-					it('pass type="text" with empty string', function(){
+					it('pass with empty string', function(){
 
 						$empty_str = '';
 						expect($empty_str)->toHaveLength(0);
@@ -102,14 +127,30 @@
 
 					});
 
-					it('do not pass type="text" when not string', function(){
+					it('fail when not a string', function(){
 
-						expect(Checker::run('text', []             ))->toBeFalsy();
-						expect(Checker::run('text', 1              ))->toBeFalsy();
-						expect(Checker::run('text', 1.23           ))->toBeFalsy();
-						expect(Checker::run('text', true           ))->toBeFalsy();
-						expect(Checker::run('text', false          ))->toBeFalsy();
-						expect(Checker::run('text', new StdClass() ))->toBeFalsy();
+						$vars = [
+							'array' => [],
+							'int' => 1,
+							'double' => 1.23,
+							'boolean' => true,
+							'object' => new StdClass(),
+							'null' => null
+						];
+
+						foreach($vars as $type=>$value){
+
+							expect($value)->toBeA($type);
+							expect(Checker::run('text', $value))->toBeFalsy();
+
+						}
+
+						// expect(Checker::run('text', []             ))->toBeFalsy();
+						// expect(Checker::run('text', 1              ))->toBeFalsy();
+						// expect(Checker::run('text', 1.23           ))->toBeFalsy();
+						// expect(Checker::run('text', true           ))->toBeFalsy();
+						// expect(Checker::run('text', false          ))->toBeFalsy();
+						// expect(Checker::run('text', new StdClass() ))->toBeFalsy();
 
 					});
 
@@ -120,7 +161,6 @@
 				context('* hash', function(){
 
 					given('sizes', function(){ return [
-							40  => 'sha1',
 							64  => 'sha256',
 							128 => 'sha512'
 						];
@@ -128,7 +168,7 @@
 					});
 
 
-					it('do not pass when -40/64/128 char hash', function(){
+					it('fail when -64/128 char hash', function(){
 
 						foreach($this->sizes as $size=>$sha){
 
@@ -142,7 +182,7 @@
 
 					});
 
-					it('pass when 40/64/128 char hash', function(){
+					it('pass when 64/128 char hash', function(){
 
 						foreach($this->sizes as $size=>$sha){
 
@@ -155,7 +195,7 @@
 
 					});
 
-					it('do not pass when +40/64/128 char hash', function(){
+					it('fail when +64/128 char hash', function(){
 
 						foreach($this->sizes as $size=>$sha){
 
@@ -169,7 +209,7 @@
 
 					});
 
-					it('do not pass when incorrect character', function(){
+					it('fail when incorrect character', function(){
 						$hash = hash('sha256', 'someClearText');
 						$hash[1] = 'g';
 
@@ -184,7 +224,7 @@
 				---------------------------------------------------------*/
 				context('* mail', function(){
 
-					it('do not pass type="mail" with out-of-boundaries elements match', function(){
+					it('fail with out-of-boundaries elements', function(){
 
 						expect(Checker::run('mail', '@b.cd'))->toBeFalsy();
 						expect(Checker::run('mail', 'a@.cd'))->toBeFalsy();
@@ -193,7 +233,7 @@
 
 					});
 
-					it('pass type="mail" with max length', function(){
+					it('pass with max length', function(){
 
 						$mail = str_repeat('a', 45).'@b.cd';
 
@@ -202,7 +242,7 @@
 
 					});
 
-					it('do not pass type="mail" with more than max length', function(){
+					it('fail with more than max length', function(){
 
 						$mail = str_repeat('a', 46).'@b.cd';
 
@@ -211,7 +251,7 @@
 
 					});
 
-					it('pass type="mail" with minimum match', function(){
+					it('pass with minimum match', function(){
 
 						expect(Checker::run('mail', 'a@b.cd'))->toBeTruthy();
 						expect(Checker::run('mail', 'a@b.cdef'))->toBeTruthy();
@@ -236,19 +276,19 @@
 
 					});
 
-					it('do not pass when not alphanumeric (space/,)', function(){
+					it('fail when not alphanumeric (space/,)', function(){
 
 						expect(Checker::run('alphanumeric', 'abcz0129-. '))->toBeFalsy();
 						expect(Checker::run('alphanumeric', 'abcz0129-.,'))->toBeFalsy();
 
 					});
 
-					it('do not pass when empty', function(){
+					it('pass when empty', function(){
 
 						$str = '';
 
 						expect($str)->toBeEmpty();
-						expect(Checker::run('alphanumeric', $str))->toBeFalsy();
+						expect(Checker::run('alphanumeric', $str))->toBeTruthy();
 
 					});
 
@@ -259,29 +299,26 @@
 				---------------------------------------------------------*/
 				context('* letters', function(){
 
-					it('pass when letters (letters/space/-)', function(){
+					it('pass when : letter/number/space/./-/_', function(){
 
-						expect(Checker::run('letters', 'abcz- - -a'))->toBeTruthy();
+						expect(Checker::run('letters', 'abcz-0.9_a'))->toBeTruthy();
 
 					});
 
+					it('pass when unicode', function(){
 
-					it('do not pass when unicode', function(){
-
-						expect(Checker::run('letters', 'çèééàôò'))->toBeFalsy();
+						expect(Checker::run('letters', 'çèééàôò'))->toBeTruthy();
 
 					});
 
-					it('do not pass when not letters (./,/numbers)', function(){
+					it('fail when not letters (,/;)', function(){
 
-						expect(Checker::run('letters', 'abcz- - -a0'))->toBeFalsy();
-						expect(Checker::run('letters', 'abcz- - -a9'))->toBeFalsy();
-						expect(Checker::run('letters', 'abcz- - -a,'))->toBeFalsy();
-						expect(Checker::run('letters', 'abcz- - -a.'))->toBeFalsy();
+						expect(Checker::run('letters', 'abcz-0.9_a,'))->toBeFalsy();
+						expect(Checker::run('letters', 'abcz-0.9_a;'))->toBeFalsy();
 
 					});
 
-					it('do not pass when empty', function(){
+					it('fail when empty', function(){
 
 						$str = '';
 
@@ -292,9 +329,537 @@
 
 				});
 
+				/* (9) rfid
+				---------------------------------------------------------*/
+				context('* rfid', function(){
+
+					it('pass when 4 block id', function(){
+
+						expect(Checker::run('rfid', 'AB-CD-EF-09'))->toBeTruthy();
+
+					});
+
+					it('fail when 4 block id but lowercase', function(){
+
+						expect(Checker::run('rfid', 'ab-cd-ef-09'))->toBeFalsy();
+
+					});
+
+					it('pass when 6 block id', function(){
+
+						expect(Checker::run('rfid', 'AB-CD-EF-09-18-27'))->toBeTruthy();
+
+					});
+
+					it('fail when 4 block id but lowercase', function(){
+
+						expect(Checker::run('rfid', 'ab-cd-ef-09-18-27'))->toBeFalsy();
+
+					});
+
+					it('fail when 6 block id', function(){
+
+						expect(Checker::run('rfid', 'B-CD-EF-01-23-45'))->toBeFalsy();
+						expect(Checker::run('rfid', 'AB-D-EF-01-23-45'))->toBeFalsy();
+						expect(Checker::run('rfid', 'AB-CD-F-01-23-45'))->toBeFalsy();
+						expect(Checker::run('rfid', 'AB-CD-EF-1-23-45'))->toBeFalsy();
+						expect(Checker::run('rfid', 'AB-CD-EF-01-3-45'))->toBeFalsy();
+						expect(Checker::run('rfid', 'AB-CD-EF-01-23-5'))->toBeFalsy();
+						expect(Checker::run('rfid', 'ABCD-EF-01-23-45'))->toBeFalsy();
+						expect(Checker::run('rfid', 'AB-CDEF-01-23-45'))->toBeFalsy();
+						expect(Checker::run('rfid', 'AB-CD-EF01-23-45'))->toBeFalsy();
+						expect(Checker::run('rfid', 'AB-CD-EF-0123-45'))->toBeFalsy();
+						expect(Checker::run('rfid', 'AB-CD-EF-01-2345'))->toBeFalsy();
+
+					});
+
+					it('fail when incorrect char', function(){
+
+						expect(Checker::run('rfid', 'AB-CD-EG-01'))->toBeFalsy();
+						expect(Checker::run('rfid', 'AB-CD-EH-01-23-45'))->toBeFalsy();
+
+					});
+
+				});
+
+				/* (10) Status
+				---------------------------------------------------------*/
+				context('* status', function(){
+
+					it('pass when numeric (int or string)', function(){
+
+						$int    = 12;
+						$string = '12';
+
+						expect($int)->toBeA('int');
+						expect(Checker::run('status', $int))->toBeTruthy();
+
+						expect($string)->toBeA('string');
+						expect(Checker::run('status', $string))->toBeTruthy();
+
+					});
+
+					it('pass when decimal with 0 as decimal part (double or string)', function(){
+
+						$int    = 12.0;
+						$string = '12.0';
+
+						expect($int)->toBeA('double');
+						expect(Checker::run('status', $int))->toBeTruthy();
+
+						expect($string)->toBeA('string');
+						expect(Checker::run('status', $string))->toBeTruthy();
+
+					});
+
+					it('fail when decimal (double or string)', function(){
+
+						$int    = 12.5;
+						$string = '12.5';
+
+						expect($int)->toBeA('double');
+						expect(Checker::run('status', $int))->toBeFalsy();
+
+						expect($string)->toBeA('string');
+						expect(Checker::run('status', $string))->toBeFalsy();
+
+					});
+
+					it('pass when boundaries', function(){
+
+						expect(Checker::run('status', 0))->toBeTruthy();
+						expect(Checker::run('status', '0'))->toBeTruthy();
+						expect(Checker::run('status', 0.0))->toBeTruthy();
+						expect(Checker::run('status', '0.0'))->toBeTruthy();
+
+						expect(Checker::run('status', 100))->toBeTruthy();
+						expect(Checker::run('status', '100'))->toBeTruthy();
+						expect(Checker::run('status', 100.0))->toBeTruthy();
+						expect(Checker::run('status', '100.0'))->toBeTruthy();
+					});
+
+					it('fail when out-of-boundaries', function(){
+
+						expect(Checker::run('status', -1))->toBeFalsy();
+						expect(Checker::run('status', '-1'))->toBeFalsy();
+						expect(Checker::run('status', -1.0))->toBeFalsy();
+						expect(Checker::run('status', '-1.0'))->toBeFalsy();
+
+						expect(Checker::run('status', 101))->toBeFalsy();
+						expect(Checker::run('status', '101'))->toBeFalsy();
+						expect(Checker::run('status', 101.0))->toBeFalsy();
+						expect(Checker::run('status', '101.0'))->toBeFalsy();
+					});
+
+				});
+
+				/* (11) Boolean
+				---------------------------------------------------------*/
+				context('* boolean', function(){
+
+					it('pass when real boolean true/false', function(){
+
+						expect(Checker::run('boolean', true))->toBeTruthy();
+						expect(Checker::run('boolean', false))->toBeTruthy();
+
+					});
+
+					it('faise when false boolean (int, string)', function(){
+
+						expect(Checker::run('boolean', 1))->toBeFalsy();
+						expect(Checker::run('boolean', 0))->toBeFalsy();
+						expect(Checker::run('boolean', ''))->toBeFalsy();
+						expect(Checker::run('boolean', []))->toBeFalsy();
+
+					});
+
+				});
+
+				/* (12) Object
+				---------------------------------------------------------*/
+				context('* object', function(){
+
+					it('fail when empty real object', function(){
+
+						$obj = new StdClass();
+
+						expect((array) $obj)->toBeEmpty();
+						expect(Checker::run('object', $obj))->toBeFalsy();
+
+					});
+
+					it('pass when non-empty real object', function(){
+
+						$obj = new StdClass();
+						$obj->a = 10;
+
+						expect((array) $obj)->not->toBeEmpty();
+						expect(Checker::run('object', $obj))->toBeTruthy();
+
+					});
+
+					it('faise when false object (assoc. array)', function(){
+
+						expect(Checker::run('object', ['a'=>function(){}]))->toBeFalsy();
+
+					});
+
+				});
+
+				/* (13) Json
+				---------------------------------------------------------*/
+				context('* json', function(){
+
+					it('pass when valid json string', function(){
+
+						expect(Checker::run('json', '{}'))->toBeTruthy();
+						expect(Checker::run('json', '{"a": true}'))->toBeTruthy();
+
+					});
+
+					it('fail when not a string', function(){
+
+						expect(Checker::run('json', 123            ))->toBeFalsy();
+						expect(Checker::run('json', [1, 2]         ))->toBeFalsy();
+						expect(Checker::run('json', true           ))->toBeFalsy();
+						expect(Checker::run('json', false          ))->toBeFalsy();
+						expect(Checker::run('json', new StdClass() ))->toBeFalsy();
+						expect(Checker::run('json', null           ))->toBeFalsy();
+
+					});
+
+					it('fail when invalid json string', function(){
+
+						expect(Checker::run('json', ''))->toBeFalsy();
+						expect(Checker::run('json', '{;}'))->toBeFalsy();
+						expect(Checker::run('json', '{"a": true}.'))->toBeFalsy();
+
+					});
+
+				});
+
+				/* (14) numeric
+				---------------------------------------------------------*/
+				context('* numeric', function(){
+
+					it('pass when numeric (int, double, negative_int, or string)', function(){
+
+						$values = [ 0, 10, -10, 0.5, -1.5, '0', '10', '-10', '0.5', '-1.5' ];
+
+						foreach($values as $value)
+							expect(Checker::run('numeric', $value))->toBeTruthy();
+
+					});
+
+					it('pass when $value == null', function(){
+
+						$values = [ 0, '', [] ];
+
+						foreach($values as $value){
+
+							expect($value)->toEqual(null);
+							expect(Checker::run('numeric', $value))->toBeTruthy();
+
+						}
+
+					});
+
+					it('pass when $value == "null"', function(){
+
+						expect(Checker::run('numeric', 'null'))->toBeTruthy();
+
+					});
+
+				});
+
+				/* (15) Varchar
+				---------------------------------------------------------*/
+				context('* varchar(start,stop)', function(){
+
+					given('values', function(){ return [
+							'ab',
+							'abcdef',
+							'abcdefkls023213\'/\\5\'7;658'
+						];
+					});
+
+					it('pass when boundaries matches', function(){
+
+						foreach($this->values as $value){
+							$min = 0;
+							$max = strlen($value)+1;
+							expect(Checker::run("varchar($min,$max)", $value))->toBeTruthy();
+
+						}
+					});
+
+					it('pass when boundaries matches min length', function(){
+
+						foreach($this->values as $value){
+							$min = strlen($value);
+							$max = strlen($value)+1;
+							expect(Checker::run("varchar($min,$max)", $value))->toBeTruthy();
+
+						}
+					});
+
+					it('pass when boundaries matches max length', function(){
+
+						foreach($this->values as $value){
+							$min = 0;
+							$max = strlen($value);
+							expect(Checker::run("varchar($min,$max)", $value))->toBeTruthy();
+
+						}
+					});
+
+					it('fail when boundaries are over min length', function(){
+
+						foreach($this->values as $value){
+							$min = strlen($value)+1;
+							$max = strlen($value)+2;
+
+							expect($min)->toBeGreaterThan(strlen($value));
+							expect(Checker::run("varchar($min,$max)", $value))->toBeFalsy();
+
+						}
+
+					});
+
+					it('fail when boundaries are under max length', function(){
+
+						foreach($this->values as $value){
+							$min = strlen($value)-2;
+							$max = strlen($value)-1;
+
+							expect($max)->toBeLessThan(strlen($value));
+							expect(Checker::run("varchar($min,$max)", $value))->toBeFalsy();
+
+						}
+
+					});
+
+				});
+
+				/* (16) Varchar + flag
+				---------------------------------------------------------*/
+				context('* varchar(start,stop,letters)', function(){
+
+					given('values', function(){ return [
+							'ab123-23',
+							'abcdef__-0.9',
+							'abcz-0.9_a'
+						];
+					});
+
+					given('notletters', function(){ return [
+							'abcdefkls023213\'/\\5\'7;658',
+							'abc;658',
+							'abc$658'
+						];
+					});
+
+					it('pass when boundaries matches', function(){
+
+						foreach($this->values as $value){
+							$min = 0;
+							$max = strlen($value)+1;
+							expect(Checker::run("varchar($min,$max,letters)", $value))->toBeTruthy();
+
+						}
+					});
+
+					it('pass when boundaries matches min length', function(){
+
+						foreach($this->values as $value){
+							$min = strlen($value);
+							$max = strlen($value)+1;
+							expect(Checker::run("varchar($min,$max,letters)", $value))->toBeTruthy();
+
+						}
+					});
+
+					it('pass when boundaries matches max length', function(){
+
+						foreach($this->values as $value){
+							$min = 0;
+							$max = strlen($value);
+							expect(Checker::run("varchar($min,$max,letters)", $value))->toBeTruthy();
+
+						}
+					});
+
+					it('fail when boundaries are over min length', function(){
+
+						foreach($this->values as $value){
+							$min = strlen($value)+1;
+							$max = strlen($value)+2;
+
+							expect($min)->toBeGreaterThan(strlen($value));
+							expect(Checker::run("varchar($min,$max,letters)", $value))->toBeFalsy();
+
+						}
+
+					});
+
+					it('fail when boundaries are under max length', function(){
+
+						foreach($this->values as $value){
+							$min = strlen($value)-2;
+							$max = strlen($value)-1;
+
+							expect($max)->toBeLessThan(strlen($value));
+							expect(Checker::run("varchar($min,$max,letters)", $value))->toBeFalsy();
+
+						}
+
+					});
 
 
 
+					it('fail when boundaries matches + not letters (incorrect flag check)', function(){
+
+						foreach($this->notletters as $value){
+							$min = 0;
+							$max = strlen($value)+1;
+							expect(Checker::run("varchar($min,$max,letters)", $value))->toBeFalsy();
+
+						}
+					});
+
+					it('fail when boundaries matches min length + not letters (incorrect flag check)', function(){
+
+						foreach($this->notletters as $value){
+							$min = strlen($value);
+							$max = strlen($value)+1;
+							expect(Checker::run("varchar($min,$max,letters)", $value))->toBeFalsy();
+
+						}
+					});
+
+					it('fail when boundaries matches max length + not letters (incorrect flag check)', function(){
+
+						foreach($this->notletters as $value){
+							$min = 0;
+							$max = strlen($value);
+							expect(Checker::run("varchar($min,$max,letters)", $value))->toBeFalsy();
+
+						}
+					});
+
+					it('fail when boundaries are over min length + not letters (incorrect flag check)', function(){
+
+						foreach($this->notletters as $value){
+							$min = strlen($value)+1;
+							$max = strlen($value)+2;
+
+							expect($min)->toBeGreaterThan(strlen($value));
+							expect(Checker::run("varchar($min,$max,letters)", $value))->toBeFalsy();
+
+						}
+
+					});
+
+					it('fail when boundaries are under max length', function(){
+
+						foreach($this->notletters as $value){
+							$min = strlen($value)-2;
+							$max = strlen($value)-1;
+
+							expect($max)->toBeLessThan(strlen($value));
+							expect(Checker::run("varchar($min,$max,letters)", $value))->toBeFalsy();
+
+						}
+
+					});
+
+				});
+
+				/* (17) Array
+				---------------------------------------------------------*/
+				context('* array', function(){
+
+					it('pass when empty array', function(){
+
+						$arr = [];
+
+						expect($arr)->toBeA('array');
+						expect($arr)->toBeEmpty();
+						expect(Checker::run('array', $arr))->toBeTruthy();
+
+					});
+
+					it('pass when empty array (whatever subtype)', function(){
+
+						$arr = [];
+
+						expect($arr)->toBeA('array');
+						expect($arr)->toBeEmpty();
+
+						expect(Checker::run('array<mixed>', $arr))->toBeTruthy();
+						expect(Checker::run('array<numeric>', $arr))->toBeTruthy();
+						expect(Checker::run('array<array>', $arr))->toBeTruthy();
+
+					});
+
+					it('pass when recursive empty arrays', function(){
+
+						$arr = [[], []];
+
+						expect($arr)->toBeA('array');
+						expect($arr[0])->toBeA('array');
+						expect($arr[1])->toBeA('array');
+						expect($arr[0])->toBeEmpty();
+						expect($arr[1])->toBeEmpty();
+
+						expect(Checker::run('array', $arr))->toBeTruthy();
+						expect(Checker::run('array<mixed>', $arr))->toBeTruthy();
+						expect(Checker::run('array<array>', $arr))->toBeTruthy();
+
+					});
+
+					it('pass when recursive array<id>', function(){
+
+						$arr = [0, 1, 2, 2147483647];
+
+						foreach($arr as $id)
+							expect(Checker::run('id', $id))->toBeTruthy();
+
+						expect($arr)->toBeA('array');
+						expect(Checker::run('array', $arr))->toBeTruthy();
+						expect(Checker::run('array<mixed>', $arr))->toBeTruthy();
+						expect(Checker::run('array<id>', $arr))->toBeTruthy();
+
+					});
+
+					it('fail when recursive array<id>', function(){
+
+						// last boundary
+						$arr = [1, 2, 3, 4, 2147483647+1];
+						expect(Checker::run('id', $arr[4]))->toBeFalsy();
+						expect(Checker::run('array<id>', $arr))->toBeFalsy();
+
+						// middle wrong
+						$arr = [1, 2, 2147483647+1, 3, 4];
+						expect(Checker::run('id', $arr[2]))->toBeFalsy();
+						expect(Checker::run('array<id>', $arr))->toBeFalsy();
+
+						// first wrong
+						$arr = [2147483647+1, 1, 2, 3, 4];
+						expect(Checker::run('id', $arr[0]))->toBeFalsy();
+
+						expect(Checker::run('array<id>', $arr))->toBeFalsy();
+
+						// all wrong
+						foreach([-1, -2, -3, 2.3, 2147483647+1] as $id)
+							expect(Checker::run('id', $id))->toBeFalsy();
+
+						expect(Checker::run('array<id>', $arr))->toBeFalsy();
+
+					});
+
+				});
+
 
 			});