/**
  * Test that attempting to set the unit value with a non string results
  * in an exception being thrown
  *
  * @expectedException InvalidArgumentException
  * @covers \OpenWeatherMap\Entity\Temperature::setUnit
  */
 public function testSetUnitWithNonStringThrowsException()
 {
     $temperature = new Temperature();
     $temperature->setUnit(new \stdClass());
 }