Phalcon unit test example not working, where is the error?

Question

PHP

Good day comrades!
In the course of getting to know Phalcon, I came across a problem with unit testing, an example of which is in the framework documentation .
With a normal copy-paste, an error appears:

PHP Fatal error: Class 'UnitTestCase' not found in /home/Dev/web/testproject.local/public_html/tests/testsTestUnitTest.php on line 5

Addendum (googled before posting the question)

$loader->registerNamespaces(array(
    'Phalcon' => '/var/tmp/incubator/Library/Phalcon/'
));

in the file TestHelper.php did not bring any results.
Also confuses the moment with the line:

// required for phalcon/incubator
include __DIR__ . "/../vendor/autoload.php";

Since there are no autoload.php files in the /incubator/ folder. The example also indicates a link to ../vendor/autoload.php, but again it is not clear what should be in this folder and in this file. Help out comrades! How to run this fascinating unit test?

Answer 1

Not familiar with Falcon (!!!), but based on

// required for phalcon/incubator
include __DIR__ . "/../vendor/autoload.php";

and
I conclude that you do not have Composer packages installed that are needed for testing. This thing /vendor/autoload.php is generated by the composer.

Answer 2

added to php.ini?
extension=phalcon.so