public function testDynamicUnit()
{
$Temp = new Temperature();
$Temp->setTemperature(20, Temperature::CELSIUS);
$this->assertEquals('20 °C', $Temp->asString());
$Temp->toFahrenheit();
$this->assertEquals('68 °F', $Temp->asString());
$Temp->setTemperature(32);
$this->assertEquals('32 °F', $Temp->asString());
$Temp->toCelsius();
$this->assertEquals('0 °C', $Temp->asString());
$this->assertFalse($Temp->isUnknown());
}
