function test_find()
{
//Arrange
$description = "Granite";
$description2 = "Crystal";
$test_Rock = new Rock($description);
$test_Rock->save();
$test_Rock2 = new Rock($description2);
$test_Rock2->save();
//Act
$id = $test_Rock->getId();
$result = Rock::find($id);
//Assert
$this->assertEquals($test_Rock, $result);
}
