关于selenium的等待时间的问题
我们一般自动化的时候等待时间和超时可能会成为case挂掉的罪魁祸首，那么下面这两种等待设置可以解决这些问题：
Wait commands in WebDriver
Listing out the different WebDriver Wait statements that can be useful for an effective scripting and can avoid using the Thread.sleep() comamnds
After few searches and digging into the WebDriver Java doc, I managed to design a mindmap of the different WebDriver commands available
WebDriver.manage().timeouts()
implicitlyWait
WebDriver driver = new FirefoxDriver();
driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
driver.get("http://somedomain/url_that_delays_loading");
WebElement myDynamicElement = driver.findElement(By.id("myDynamicElement"));
The ImplicitWait will tell the webDriver to poll the DOM for a certain duration when trying to find the element, this will be useful when certain elements on the webpage will not be available immediately and needs some time to load.
By default it ill take the value to 0, for the life of the WebDriver object instance through out the test script.
pageLoadTimeout//这个可以修改HTTP的等待时间哦
driver.manage().timeouts().pageLoadTimeout(100, SECONDS);
Sets the amount of time to wait for a page load to complete before throwing an error. If the timeout is negative, page loads can be indefinite.
setScriptTimeout
driver.manage().timeouts().setScriptTimeout(100,SECONDS);
Sets the amount of time to wait for an asynchronous script to finish execution before throwing an error. If the timeout is negative, then the script will be allowed to run indefinitely.
Support.ui
FluentWait
// Waiting 30 seconds for an element to be present on the page, checking
// for its presence once every 5 seconds.
Wait<WebDriver> wait = new FluentWait<WebDriver>(driver)
.withTimeout(30, SECONDS)
.pollingEvery(5, SECONDS)
.ignoring(NoSuchElementException.class);
WebElement foo = wait.until(new Function<WebDriver, WebElement>() {
public WebElement apply(WebDriver driver) {
return driver.findElement(By.id("foo"));
}
});
Each FluentWait instance defines the maximum amount of time to wait for a condition, as well as the frequency with which to check the condition. Furthermore, the user may configure the wait to ignore specific types of exceptions whilst waiting, such as NoSuchElementExceptions when searching for an element on the page.
ExpectedConditions（until这种会导致debug时产生异常等待，等我研究研究看怎么解决 嘿嘿）
WebDriverWait wait = new WebDriverWait(driver, 10);
WebElement element = wait.until(ExpectedConditions.elementToBeClickable(By.id("someid")));
Models a condition that might reasonably be expected to eventually evaluate to something that is neither null nor false.
Examples : Would include determining if a web page has loaded or that an element is visible.
Note that it is expected that ExpectedConditions are idempotent. They will be called in a loop by the WebDriverWait and any modification of the state of the application under test may have unexpected side-effects.
WebDriverWait will be used as we used in the Expected conditions code snippet as above.
sleeper is something same as the Thread.sleep() method, but this with an Abstraction around the thread.sleep() for better testability （有的时候sleep会用起来更方便，但是应该有它不优化的一面 等我研究