yii2 codeception application class wrong - yii2

Question

When I change the application model in my acceptance test, the test acutally uses that model, when I do the same in functional test... the test still uses yii/web/application
I need it to use my common/compontents/application model.
How can I change that ?
The functional _bootstrap contains my custom model... (common/compontents/application)
I am totally baffled....
When I run my testing code:
use tests\codeception\frontend\FunctionalTester;
$I = new FunctionalTester($scenario);
$I->amOnPage('/');
Then I get the error:
[yii\base\UnknownPropertyException] Getting unknown property: yii\web\Application::nowSQL
This nowSQL is defined in common\components\application, but somehow this functional test uses the default
Acceptance yml
# Codeception Test Suite Configuration
# suite for acceptance tests.
# perform tests in browser using the Selenium-like tools.
# powered by Mink (http://mink.behat.org).
# (tip: that's what your customer will see).
# (tip: test your ajax and javascript by one of Mink drivers).
# RUN `build` COMMAND AFTER ADDING/REMOVING MODULES.
class_name: AcceptanceTester
modules:
enabled:
- PhpBrowser
- tests\codeception\common\_support\FixtureHelper
# you can use WebDriver instead of PhpBrowser to test javascript and ajax.
# This will require you to install selenium. See http://codeception.com/docs/04-AcceptanceTests#Selenium
# "restart" option is used by the WebDriver to start each time per test-file new session and cookies,
# it is useful if you want to login in your app in each test.
# - WebDriver
config:
PhpBrowser:
# PLEASE ADJUST IT TO THE ACTUAL ENTRY POINT WITHOUT PATH INFO
url: http://example.com
# WebDriver:
# url: http://localhost:8080
# browser: firefox
# restart: true
Functional .YML
# Codeception Test Suite Configuration
# suite for functional (integration) tests.
# emulate web requests and make application process them.
# (tip: better to use with frameworks).
# RUN `build` COMMAND AFTER ADDING/REMOVING MODULES.
#basic/web/index.php
class_name: FunctionalTester
modules:
enabled:
- Filesystem
- Yii2
- tests\codeception\common\_support\FixtureHelper
config:
Yii2:
configFile: '../config/frontend/functional.php'

Answer 1

In order to use your custom application class for functional tests, set the 'class' configuration in your 'functional.php' config.
functional.suite.yml:
class_name: FunctionalTester
modules:
enabled:
- Yii2
config:
Yii2:
configFile: 'codeception/config/functional.php'
functional.php:
return [
'class' => 'my\custom\Application',
...
];
Regarding acceptance testing you have to change the Application implementation used in your index-text.php:
[...]
(new my\custom\Application($config))->run();