/**
* Checks the unit systems getter
*/
public function testUnitSystems()
{
$this->assertEquals(UnitSystem::getUnitSystems(), array(UnitSystem::IMPERIAL, UnitSystem::METRIC));
}
/**
* Sets the directions request unit system
*
* @param string $unitSystem
*/
public function setUnitSystem($unitSystem = null)
{
if (in_array($unitSystem, UnitSystem::getUnitSystems()) || is_null($unitSystem)) {
$this->unitSystem = $unitSystem;
} else {
throw new \InvalidArgumentException(sprintf('The directions request unit system can only be : %s', implode(', ', UnitSystem::getUnitSystems())));
}
}