diff --git a/extensions/mongo/Connection.php b/extensions/mongo/Connection.php
index ff8093d..5ee3d40 100644
--- a/extensions/mongo/Connection.php
+++ b/extensions/mongo/Connection.php
@@ -15,6 +15,8 @@ use Yii;
 /**
  * Class Connection
  *
+ * @property boolean $isActive Whether the Mongo connection is established. This property is read-only.
+ *
  * @author Paul Klimov <klimov.paul@gmail.com>
  * @since 2.0
  */
@@ -50,6 +52,15 @@ class Connection extends Component
 	public $dbName;
 
 	/**
+	 * Returns a value indicating whether the Mongo connection is established.
+	 * @return boolean whether the Mongo connection is established
+	 */
+	public function getIsActive()
+	{
+		return is_object($this->client) && $this->client->connected;
+	}
+
+	/**
 	 * Establishes a Mongo connection.
 	 * It does nothing if a Mongo connection has already been established.
 	 * @throws Exception if connection fails
diff --git a/tests/unit/extensions/mongo/ConnectionTest.php b/tests/unit/extensions/mongo/ConnectionTest.php
index a5b246a..f6a47f0 100644
--- a/tests/unit/extensions/mongo/ConnectionTest.php
+++ b/tests/unit/extensions/mongo/ConnectionTest.php
@@ -3,6 +3,8 @@
 namespace yiiunit\extensions\mongo;
 
 
+use yii\mongo\Connection;
+
 class ConnectionTest extends MongoTestCase
 {
 	public function testConstruct()
@@ -13,7 +15,28 @@ class ConnectionTest extends MongoTestCase
 		$connection->open();
 
 		$this->assertEquals($params['dsn'], $connection->dsn);
-		//$this->assertEquals($params['username'], $connection->username);
-		//$this->assertEquals($params['password'], $connection->password);
+		$this->assertEquals($params['dbName'], $connection->dbName);
+		$this->assertEquals($params['options'], $connection->options);
+	}
+
+	public function testOpenClose()
+	{
+		$connection = $this->getConnection(false, false);
+
+		$this->assertFalse($connection->isActive);
+		$this->assertEquals(null, $connection->client);
+
+		$connection->open();
+		$this->assertTrue($connection->isActive);
+		$this->assertTrue(is_object($connection->client));
+
+		$connection->close();
+		$this->assertFalse($connection->isActive);
+		$this->assertEquals(null, $connection->client);
+
+		$connection = new Connection;
+		$connection->dsn = 'unknown::memory:';
+		$this->setExpectedException('yii\db\Exception');
+		$connection->open();
 	}
 }
\ No newline at end of file