From the need of having a framework to work with Unit Test for project I decouple from the original woocommerce/woocommerce maininting the code untouched just modular.
composer require killua99/woocommerce-phpunit-framework
That should do.
Just extend the class \WC_Unit_Test_Case to start working with the framework and using the creation helper $this->product = WC_Helper_Product::create_simple_product();