public function testImplements()
{
$exception = new InvalidBalancerUrlException();
$this->assertEquals('Balancer URL is invalid', $exception->getMessage());
$this->assertAttributeEquals(null, 'url', $exception);
$this->assertEquals(null, $exception->getUrl());
$url = ['value' => 1];
$exception->setUrl($url);
$this->assertAttributeEquals($url, 'url', $exception);
$this->assertEquals($url, $exception->getUrl());
}
