Simplify Keyboard entities and tests to remove duplicate code.

Small optimisation for Chat entity.

src/Entities/Chat.php

@@ -36,7 +36,7 @@ class Chat extends Entity
 
         $id   = $this->getId();
         $type = $this->getType();
-        if (!$type && $id !== 0) {
+        if (!$type) {
             $id > 0 && $this->type = 'private';
             $id < 0 && $this->type = 'group';
         }

src/Entities/InlineKeyboard.php

@@ -10,8 +10,6 @@
 
 namespace Longman\TelegramBot\Entities;
 
-use Longman\TelegramBot\Exception\TelegramException;
-
 /**
  * Class InlineKeyboard
  *
@@ -19,32 +17,4 @@ use Longman\TelegramBot\Exception\TelegramException;
  */
 class InlineKeyboard extends Keyboard
 {
-    /**
-     * {@inheritdoc}
-     */
-    public function __construct($data = [])
-    {
-        $data = call_user_func_array([$this, 'createFromParams'], func_get_args());
-        parent::__construct($data);
-    }
-
-    /**
-     * {@inheritdoc}
-     */
-    protected function validate()
-    {
-        $inline_keyboard = $this->getProperty('inline_keyboard');
-
-        if ($inline_keyboard !== null) {
-            if (!is_array($inline_keyboard)) {
-                throw new TelegramException('Inline Keyboard field is not an array!');
-            }
-
-            foreach ($inline_keyboard as $item) {
-                if (!is_array($item)) {
-                    throw new TelegramException('Inline Keyboard subfield is not an array!');
-                }
-            }
-        }
-    }
 }

src/Entities/Keyboard.php

@@ -178,16 +178,17 @@ class Keyboard extends Entity
      */
     protected function validate()
     {
-        $keyboard = $this->getProperty('keyboard');
+        $keyboard_type = $this->getKeyboardType();
+        $keyboard = $this->getProperty($keyboard_type);
 
         if ($keyboard !== null) {
             if (!is_array($keyboard)) {
-                throw new TelegramException('Keyboard field is not an array!');
+                throw new TelegramException($keyboard_type . ' field is not an array!');
             }
 
             foreach ($keyboard as $item) {
                 if (!is_array($item)) {
-                    throw new TelegramException('Keyboard subfield is not an array!');
+                    throw new TelegramException($keyboard_type . ' subfield is not an array!');
                 }
             }
         }

tests/unit/Entities/InlineKeyboardTest.php

@@ -36,7 +36,7 @@ class InlineKeyboardTest extends TestCase
 
     /**
      * @expectedException \Longman\TelegramBot\Exception\TelegramException
-     * @expectedExceptionMessage Inline Keyboard field is not an array!
+     * @expectedExceptionMessage inline_keyboard field is not an array!
      */
     public function testInlineKeyboardDataMalformedField()
     {
@@ -45,7 +45,7 @@ class InlineKeyboardTest extends TestCase
 
     /**
      * @expectedException \Longman\TelegramBot\Exception\TelegramException
-     * @expectedExceptionMessage Inline Keyboard subfield is not an array!
+     * @expectedExceptionMessage inline_keyboard subfield is not an array!
      */
     public function testInlineKeyboardDataMalformedSubfield()
     {

tests/unit/Entities/KeyboardTest.php

@@ -25,7 +25,7 @@ class KeyboardTest extends TestCase
 {
     /**
      * @expectedException \Longman\TelegramBot\Exception\TelegramException
-     * @expectedExceptionMessage Keyboard field is not an array!
+     * @expectedExceptionMessage keyboard field is not an array!
      */
     public function testKeyboardDataMalformedField()
     {
@@ -34,7 +34,7 @@ class KeyboardTest extends TestCase
 
     /**
      * @expectedException \Longman\TelegramBot\Exception\TelegramException
-     * @expectedExceptionMessage Keyboard subfield is not an array!
+     * @expectedExceptionMessage keyboard subfield is not an array!
      */
     public function testKeyboardDataMalformedSubfield()
     {