Phpunit composer psr-4 not found

Question

I am letting autoload composer try some phpunit testing classes, and I can't get it to work. when I run phpunit from the command line, I get "PHP Fatal Error: Class ... not found".

I will give all the information about the structure and the file, I can hope that someone will find where I made a mistake.

Structure (reduction to the corresponding files):

composer.json
composer.lock
phpunit.xml
    vendor/
    tests/
        functional/
            BaseTestCase.php
            HomepageTest.php

composer.json

{
"require": {
    "php": ">=5.5.0",
    "slim/slim": "^3.1",
    "slim/php-view": "^2.0",
    "monolog/monolog": "^1.17"
},
"require-dev": {
    "phpunit/phpunit": ">=4.8 < 6.0"
},
"autoload-dev": {
    "psr-4": {
        "Tests\\": "tests/"
    }
}
}

phpunit.xml

<?xml version="1.0" encoding="utf-8" ?>
<phpunit colors="true" bootstrap="vendor/autoload.php">
    <testsuites>
        <testsuite name="Initial tests">
            <directory>tests/</directory>
        </testsuite>
    </testsuites>
</phpunit>

Test / Functional / BaseTestCase.php

<?php
namespace Tests\Functional;

use Slim\App;
use Slim\Http\Request;
use Slim\Http\Response;
use Slim\Http\Environment;

class BaseTestCase extends \PHPUnit_Framework_TestCase
{
  ...

Test / functional / HomepageTest.php

<?php
namespace Tests\Functional;

class HomepageTest extends BaseTestCase
{
   ...

Then I started the update to update startup files

$ composer update

Loading composer repositories with package information
Updating dependencies (including require-dev)
Nothing to install or update
Writing lock file
Generating autoload files

Then I tried to run phpunit and got a class error not found:

$ vendor/bin/phpunit

PHP Fatal error:  Class 'Tests\Functional\BaseTestCase' not found in <project-root>/tests/functional/HomepageTest.php on line 6

To be thorough, I tried updating the startup files in a different way, just in case:

$ composer dump-autoload

Generating autoload files
sfbagency@sfb1:~/clients/ctest/dev$ 

vendor/composer/autoload_psr4.php, , Test , .

...
Tests\\' => array($baseDir . '/tests'),
...

Googled , , .

Answer 1

. Functional

PSR-4:

-.

Answer 2

, . ClassTest (ModelTwoTest.php ), Fixtures.php . 1 modelTest, Fixtures. .

src/
tests/
      Models/
             ModelOneTest.php
             ModelTwoTest.php <---
      Fixtures/
             Fixtures.php