Fixed regexp in tests

framework/db/mysql/ColumnSchema.php

@@ -0,0 +1,52 @@
+<?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+namespace yii\db\mysql;
+
+use yii\db\ExpressionInterface;
+use yii\db\JsonExpression;
+
+/**
+ * Class ColumnSchema
+ *
+ * @author Dmytro Naumenko <d.naumenko.a@gmail.com>
+ * @since 2.0.14.1
+ */
+class ColumnSchema extends \yii\db\ColumnSchema
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function dbTypecast($value)
+    {
+        if ($value instanceof ExpressionInterface) {
+            return $value;
+        }
+
+        if ($this->dbType === Schema::TYPE_JSON) {
+            return new JsonExpression($value, $this->type);
+        }
+
+        return $this->typecast($value);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function phpTypecast($value)
+    {
+        if ($value === null) {
+            return null;
+        }
+
+        if ($this->type === Schema::TYPE_JSON) {
+            return json_decode($value, true);
+        }
+
+        return parent::phpTypecast($value);
+    }
+}