public function testInvert()
{
$conv = new ExchangeRate("EUR/USD 1.25");
$conv->invert();
$this->assertEquals(0.8, $conv->getRate());
$this->assertEquals("USD", $conv->getSourceCurrency()->__toString());
$this->assertEquals("EUR", $conv->getTargetCurrency()->__toString());
$this->assertEquals("USD/EUR 0.8", $conv->__toString());
$conv->invert();
$this->assertEquals("EUR/USD 1.25", $conv->__toString());
}
/**
* Checks source and target currencies provided are equal to the $exRate object's source and target
*
* @param ExchangeRate $exRate
* @param Currency $source
* @param Currency $target
*
* @return boolean
*/
protected function isEqualCurrencies($exRate, Currency $source, Currency $target)
{
return $exRate->getSourceCurrency()->isEqualTo($source) && $exRate->getTargetCurrency()->isEqualTo($target);
}