WebDriverWait.php
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<?php
// Copyright 2004-present Facebook. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
namespace Facebook\WebDriver;
use Facebook\WebDriver\Exception\NoSuchElementException;
use Facebook\WebDriver\Exception\TimeOutException;
/**
* A utility class, designed to help the user to wait until a condition turns
* true.
*
* @see WebDriverExpectedCondition.
*/
class WebDriverWait {
protected $driver;
protected $timeout;
protected $interval;
public function __construct(
WebDriver $driver,
$timeout_in_second = null,
$interval_in_millisecond = null) {
$this->driver = $driver;
$this->timeout = $timeout_in_second ?: 30;
$this->interval = $interval_in_millisecond ?: 250;
}
/**
* Calls the function provided with the driver as an argument until the return
* value is not falsey.
*
* @param (closure|WebDriverExpectedCondition)
* @param string $message
*
* @return mixed The return value of $func_or_ec
* @throws NoSuchElementException
* @throws TimeOutException
* @throws \Exception
*/
public function until($func_or_ec, $message = "") {
$end = microtime(true) + $this->timeout;
$last_exception = null;
while ($end > microtime(true)) {
try {
if ($func_or_ec instanceof WebDriverExpectedCondition) {
$ret_val = call_user_func($func_or_ec->getApply(), $this->driver);
} else {
$ret_val = call_user_func($func_or_ec, $this->driver);
}
if ($ret_val) {
return $ret_val;
}
} catch (NoSuchElementException $e) {
$last_exception = $e;
}
usleep($this->interval * 1000);
}
if ($last_exception) {
throw $last_exception;
}
throw new TimeOutException($message);
}
}