public function testGetTtl()
{
$page = $this->getMock('Sonata\\PageBundle\\Model\\PageInterface');
$block = new Block();
$block->setPage($page);
$this->assertFalse($block->hasChildren());
$child1 = $this->getMock('Sonata\\PageBundle\\Model\\BlockInterface');
$child1->expects($this->once())->method('getTtl')->will($this->returnValue(100));
$child2 = $this->getMock('Sonata\\PageBundle\\Model\\BlockInterface');
$child2->expects($this->once())->method('getTtl')->will($this->returnValue(50));
$child3 = $this->getMock('Sonata\\PageBundle\\Model\\BlockInterface');
$child3->expects($this->once())->method('getTtl')->will($this->returnValue(65));
$block->addChildren($child1);
$block->addChildren($child2);
$block->addChildren($child3);
$this->assertEquals(50, $block->getTtl());
$this->assertTrue($block->hasChildren());
}