<?php

class api
{
    private $key;
    private $secret;

    public function __construct($key, $secret)
    {
        $this->key = $key;
        $this->secret = $secret;
    }
}

public function test_api_keys_are_set_on_initialization()
{
    $this->assertNotEmpty($this->api->key);
    $this->assertNotEmpty($this->api->secret);
}