Incorrect array representation when has previous

framework/yii/base/Exception.php

@@ -41,10 +41,10 @@ class Exception extends \Exception implements Arrayable
 	{
 		if ($exception instanceof self) {
 			$array = array(
-				'type' => get_class($this),
-				'name' => $this->getName(),
-				'message' => $this->getMessage(),
-				'code' => $this->getCode(),
+				'type' => get_class($exception),
+				'name' => $exception->getName(),
+				'message' => $exception->getMessage(),
+				'code' => $exception->getCode(),
 			);
 		} else {
 			$array = array(

tests/unit/framework/base/ExceptionTest.php

@@ -0,0 +1,23 @@
+<?php
+namespace yiiunit\framework\base;
+
+use yii\test\TestCase;
+use yii\base\UserException;
+use yii\base\InvalidCallException;
+
+
+class ExceptionTest extends TestCase
+{
+	public function testToArrayWithPrevious() 
+	{
+		$e = new InvalidCallException('bar', 0 ,new InvalidCallException('foo'));
+		$array = $e->toArray();
+		$this->assertEquals('bar', $array['message']);
+		$this->assertEquals('foo', $array['previous']['message']);
+		
+		$e = new InvalidCallException('bar', 0 ,new UserException('foo'));
+		$array = $e->toArray();
+		$this->assertEquals('bar', $array['message']);
+		$this->assertEquals('foo', $array['previous']['message']);
+	}
+}