tests\codeception\frontend\_pages\SignupPage::submit PHP Method

    public function submit(array $signupData)
    {
        foreach ($signupData as $field => $value) {
            $inputType = $field === 'body' ? 'textarea' : 'input';
            $this->actor->fillField($inputType . '[name="SignupForm[' . $field . ']"]', $value);
        }
        $this->actor->click('signup-button');
    }