function test_setAvailable()
{
//Arrange
$available = true;
$book_id = 1;
$test_copy = new Copy($available, $book_id);
$available2 = false;
//Act
$test_copy->setAvailable($available2);
$result = $test_copy->getAvailable();
//Assert
$this->assertEquals($available2, $result);
}
