testing.php

<?php
// run all the tests
abstract class TestSuite {
    public function __construct() {
        $ref = new ReflectionClass($this);
        $methods = $ref->getMethods(ReflectionMethod::IS_PUBLIC);
        $output = '';

        foreach ($methods as $method) {
            if ($method->getDeclaringClass() == $ref) {
                try {
                    $method->invoke($this);
                    $output .= '.';
                } catch (Exception $ex) {
                    $errors[] = $method->getName() . ': ' . $ex->getMessage() . "\n";
                    $output .= 'F';
                }
            }
        }

        echo $output . "\n\n" . implode("\n", $errors);
    }

    protected function assertSame($expected, $actual) {
        if ($expected !== $actual) {
            throw new Exception("Expected $expected; got $actual");
        }
    }
}

function multiply($a, $b) {
    return -$a * $b;
}

class MultiplyTest extends TestSuite {
    function test_multiply() {
        $a = 5;
        $b = 4;
        $answer = 20;

        $this->assertSame($answer, multiply($a, $b));
    }
}

new MultiplyTest;