public function testConstantAccel() { $unit = new UnitComposition(); $length = $unit->getUnitClass(UnitComposition::LENGTH); $time = $unit->getUnitClass(UnitComposition::TIME); $accel = $unit->getUnitClass(UnitComposition::ACCELERATION); $length->preConvertedAdd(1); $time->preConvertedAdd(1); $accel->preConvertedAdd(1); $this->assertInstanceOf('Samsara\\Newton\\Units\\Time', PhysicsProvider::constantAccelCalcs($length, $accel)); $this->assertInstanceOf('Samsara\\Newton\\Units\\Length', PhysicsProvider::constantAccelCalcs($time, $accel)); $this->assertInstanceOf('Samsara\\Newton\\Units\\Acceleration', PhysicsProvider::constantAccelCalcs($length, $time)); }