<?php


namespace OneSite\DesignPattern\Tests;


use OneSite\DesignPattern\Singleton\Config;
use OneSite\DesignPattern\Singleton\Logger;

class SingletonTest
{
    public function testSingletonPattern()
    {
        /**
         * The client code.
         */
        Logger::log("Started!");

        // Compare values of Logger singleton.
        $l1 = Logger::getInstance();
        $l2 = Logger::getInstance();
        if ($l1 === $l2) {
            Logger::log("Logger has a single instance.");
        } else {
            Logger::log("Loggers are different.");
        }

        // Check how Config singleton saves data...
        $config1 = Config::getInstance();
        $login = "test_login";
        $password = "test_password";
        $config1->setValue("login", $login);
        $config1->setValue("password", $password);
        // ...and restores it.
        $config2 = Config::getInstance();
        if ($login == $config2->getValue("login") &&
            $password == $config2->getValue("password")
        ) {
            Logger::log("Config singleton also works fine.");
        }

        Logger::log("Finished!");

        return $this->assertTrue(true);
    }
}