function test_printNumbersUpToInput()
{
//Arrange
$test_PingPongGenerator = new PingPongGenerator();
$input = 11;
//Act
$result = $test_PingPongGenerator->generateCountUpArray($input);
//Assert
$this->assertEquals(array(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11), $result);
}
