test-settings-page.php

<?php

class SettingsPageCest {

	public function _before( AcceptanceTester $I ) {

		$I->amOnPage( '/wp-login.php' );
		$I->wait( 1 );
		$I->fillField( [ 'name' => 'log' ], 'admin' );
		$I->fillField( [ 'name' => 'pwd' ], 'password' );
		$I->click( '#wp-submit' );
	}

	public function general_settings_page( AcceptanceTester $I ) {

		$I->amOnPage('/wp-admin/admin.php?page=backwpupsettings');
		$I->see('Display Settings', 'h3');

		$I->dontSeeCheckboxIsChecked('#showadminbarmenu');
		$I->dontSeeCheckboxIsChecked('#showfoldersize');
		$I->seeCheckboxIsChecked('#protectfolders');

		$I->checkOption('#showadminbarmenu');
		$I->checkOption('#showfoldersize');
		$I->uncheckOption('#protectfolders');
		$I->click('Save Changes');

		$I->seeCheckboxIsChecked('#showadminbarmenu');
		$I->seeCheckboxIsChecked('#showfoldersize');
		$I->dontSeeCheckboxIsChecked('#protectfolders');
	}
}