AcceptanceTester::selectDropdown PHP Method

    function selectDropdown(\AcceptanceTester $I, $option, $dropdownSelector)
    {
        $I->click($dropdownSelector);
        $I->click(sprintf('ul.typeahead li[data-value="%s"]', $option));
    }

 public function createExpense(AcceptanceTester $I)
 {
     $I->wantTo('Create an expense');
     $vendorName = $this->faker->name;
     $clientEmail = $this->faker->safeEmail;
     $amount = $this->faker->numberBetween(10, 20);
     // create vendor
     $I->amOnPage('/vendors/create');
     $I->fillField(['name' => 'name'], $vendorName);
     $I->click('Save');
     $I->see($vendorName);
     $vendorId = $I->grabFromDatabase('vendors', 'id', ['name' => $vendorName]);
     // create client
     $I->amOnPage('/clients/create');
     $I->fillField(['name' => 'contacts[0][email]'], $clientEmail);
     $I->click('Save');
     $I->see($clientEmail);
     // create expense
     $I->amOnPage('/expenses/create');
     $I->fillField(['name' => 'amount'], $amount);
     $I->selectDropdown($I, $vendorName, '.vendor-select .dropdown-toggle');
     $I->selectDropdown($I, $clientEmail, '.client-select .dropdown-toggle');
     $I->click('Save');
     $I->seeInDatabase('expenses', ['vendor_id' => $vendorId]);
     // invoice expense
     $I->executeJS('submitAction(\'invoice\')');
     $I->click('Save');
     $I->wait(1);
     $I->see($clientEmail);
     $I->see($amount);
 }