public function testError()
{
$math = new Math();
// no input
try {
$math->add();
} catch (\Exception $e) {
$this->assertEquals('Please provide numbers to add', $e->getMessage());
}
// no input
try {
$math->subtract();
} catch (\Exception $e) {
$this->assertEquals('Please provide numbers to subtract', $e->getMessage());
}
// no input
try {
$math->multiply();
} catch (\Exception $e) {
$this->assertEquals('Please provide numbers to multiply', $e->getMessage());
}
// no input
try {
$math->divide();
} catch (\Exception $e) {
$this->assertEquals('Please provide numbers to divide', $e->getMessage());
}
//invalid input
try {
$math->setA('adf');
} catch (\Exception $e) {
$this->assertEquals('Invalid input', $e->getMessage());
}
}
<?php
require_once __DIR__ . '/math.php';
$result = '0';
if (isset($_POST['a']) && isset($_POST['b']) && isset($_POST['process'])) {
$math = new Math();
switch (strtolower($_POST['process'])) {
case 'add':
try {
$result = $math->setA($_POST['a'])->setB($_POST['b'])->add();
} catch (Exception $e) {
$msg = $e->getMessage();
}
break;
case 'subtract':
try {
$result = $math->setA($_POST['a'])->setB($_POST['b'])->subtract();
} catch (Exception $e) {
$msg = $e->getMessage();
}
break;
case 'multiply':
try {
$result = $math->setA($_POST['a'])->setB($_POST['b'])->multiply();
} catch (Exception $e) {
$msg = $e->getMessage();
}
break;
case 'divide':
try {
$result = $math->setA($_POST['a'])->setB($_POST['b'])->divide();
