docker dusk browser can't another web server container - docker

Question

set .env like the followings about Server address.
APP_URL=http://localhost:8000
APP_DOMAIN=localhost
I am using apache2 (docker container) as web server.
under this condition, to test with dusk, started up selenium/standalone-chrome as another container.
docker run -p 4444:4444 --name selenium --link apache2:apache2 -d selenium/standalone-chrome
to confirm the connection between docker containers,
used the following commands
docker exec -it selenium bash,
cat /etc/hosts/
result was
172.17.0.6 apache2 a1c15575e4c8
also confirmed ping apache2 from selenium container.
but from here, couldn't do dusk test using following command.
when I check the browser response, there was no contents.
docker exec apache2 php artisan dusk
I think setting is wrong. but can't notice it.
could you help?
the following is php source code.
DuskTestCase.php
abstract class DuskTestCase extends BaseTestCase
{
use CreatesApplication;
/**
* Prepare for Dusk test execution.
*
* #beforeClass
* #return void
*/
public static function prepare()
{
static::startChromeDriver();
}
/**
* Create the RemoteWebDriver instance.
*
* #return \Facebook\WebDriver\Remote\RemoteWebDriver
*/
protected function driver()
{
$options = (new ChromeOptions)->addArguments([
'--disable-gpu',
'--headless'
]);
return RemoteWebDriver::create(
'http://selenium:4444/wd/hub', DesiredCapabilities::chrome()->setCapability(
ChromeOptions::CAPABILITY, $options
)
);
}
}
ExampleTest.php
class ExampleTest extends DuskTestCase
{
public function testBasicExample()
{
$this->browse(function (Browser $browser) {
print_r($browser->visit('/')->resolver->elements);exit;
$browser->visit('/')
->assertSee('login');
});
}
}