/**
* @covers tarcisio\p2d\Point::setLength
*/
public function testSetLength()
{
$p = new Point();
$p->setLength(10);
$this->assertEquals(10, $p->x);
$this->assertEquals(0, $p->y);
$p = new Point(100, 100);
$p->setLength(10);
$this->assertEquals(10, $p->getLength());
$p = new Point(0, 10);
$c = clone $p;
$p->setLength(0);
$this->assertEquals($c, $p);
}