Create a new composer project

{
    "name": "fzerorubigd/tehlog-test",
    "description": "TDD demonstration",
    "authors": [
        {
            "name": "fzerorubigd",
            "email": "[email protected]"
        }
    ],
    "require": {
    },
        "require-dev": {
        "phpunit/phpunit":
        "~3.7"
        },
    "config": {
        "bin-dir": "bin/"
    },
    "autoload": {
        "psr-0": {
            "Cybits": "src/"
        }
    }
}

then run the composer :

composer install --dev

<?xml version="1.0" encoding="UTF-8"?>

<phpunit bootstrap="tests/bootstrap.php" colors="true">
    <testsuites>
        <testsuite name="TDD example test suite">
            <directory>tests/</directory>
        </testsuite>
    </testsuites>

    <filter>
        <whitelist>
            <directory suffix=".php">src/</directory>
        </whitelist>
    </filter>
</phpunit>

<?php

namespace Cybits;

class Example
{
    public function min($a, $b)
    {
        return 10;
    }

    public function max($a, $b)
    {
        return 100;
    }
} 

f0rud@elbix:/home/f0rud/testSlides/php git:(master*) $ ./bin/phpunit
    PHPUnit 3.7.28 by Sebastian Bergmann.

    Configuration read from /home/f0rud/testSlides/php/phpunit.xml.dist

    ..

    Time: 25 ms, Memory: 3.00Mb

    OK (2 tests, 2 assertions)

<?php

class ExampleTest extends PHPUnit_Framework_TestCase
{

    public function testMin()
    {
        $obj = new \Cybits\Example();
        $this->assertEquals(10, $obj->min(10, 100));
        $this->assertEquals(5, $obj->min(10, 5));
        $this->assertEquals(1, $obj->min(1, 100));
    }

    public function testMax()
    {
        $obj = new \Cybits\Example();
        $this->assertEquals(100, $obj->max(10, 100));
        $this->assertEquals(70, $obj->max(11, 70));
        $this->assertEquals(20, $obj->max(10, 20));
    }
}

<?php

namespace Cybits;

class Example
{
    public function min($a, $b)
    {
        return min($a, $b);
    }

    public function max($a, $b)
    {
        return max($a, $b);
    }
}