public function testProjPerpSumEqualsA(array $A, array $B)
{
$A = new Vector($A);
$B = new Vector($B);
$projᵇA = $A->projection($B);
$perpᵇA = $A->perp($B);
$projᵇA+perpᵇA = $projᵇA->add($perpᵇA);
$this->assertEquals($A, $projᵇA+perpᵇA);
$this->assertEquals($A->getVector(), $projᵇA+perpᵇA->getVector());
}