public function testcalculateTotal()
{
//execute the method with data preset and verify it returns expected result
$totals = array(10, 20, 30);
$aor_Report = new AOR_Report();
$this->assertEquals('', $aor_Report->calculateTotal('', $totals));
$this->assertEquals(60, $aor_Report->calculateTotal('SUM', $totals));
$this->assertEquals(3, $aor_Report->calculateTotal('COUNT', $totals));
$this->assertEquals(20, $aor_Report->calculateTotal('AVG', $totals));
}
