点击之前我总是要等吗？

Question

I'm writing some tests for my site using WebdriverIO alongside Mocha/Chai, but when I do this:

it('select application', function(done) {
    client
        .click('.disciplinetext > table:nth-child(7) > tbody:nth-child(1) > tr:nth-child(1) > td:nth-child(3) > button:nth-child(1)')
        // more stuff

The element doesn't exist yet (wasn't rendered). Shouldn't .click() implicitly wait for the page to finish loading before it actually attempts to click the element?

It works fine if I slap this line before it:

.waitFor('.disciplinetext > table:nth-child(7) > tbody:nth-child(1) > tr:nth-child(1) > td:nth-child(3) > button:nth-child(1)',1000)

But I don't want to have to throw a waitFor before every .setValue() , .click() , .getText() , or any other API command . Am I missing something?

Is there either a command to wait for the whole page to load, or a setting to make implicitly wait before accessing an element?

Answer 1

The driver.manage().timeouts().implicitlyWait(ms) function does exist in the WebdriverJS Reference API Docs . This API is for the official Javascript API that Selenium supports and @sircapsalot's excerpt comes from. However, it is much cleaner than looking at the Google Code and much easier to navigate.

Answer 2

You can set the duration of the implicit wait via:

Driver.Manage().Timeouts().ImplicitlyWait(TimeSpan.FromSeconds(2));

The default setting is 0, which is why click() fires instantly.

Obviously this is ac# example, but hopefully you can translate it.

I think this is aa webdriverjs example:

driver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);

Answer 3

It doesn't look like webdriverjs even has an implicit timeout, ergo, no way to change it.

1 solution I can think of, is to override the click() method to something like this... (note that this is psuedo.)

click = function(what) {
  waitFor(what);
  super(what);
}

it's an explicit wait, but we can consider it implicit ;)

EDIT: I took a further look into the "inner sanctum" of webdriverjs, and i found this excerpt from here

/**
 * ...
 * @param {number} ms The amount of time to wait, in milliseconds.
 * @return {!webdriver.promise.Promise} A promise that will be resolved when the
 *     implicit wait timeout has been set.
 */
webdriver.WebDriver.Timeouts.prototype.implicitlyWait = function(ms) {
  return this.driver_.schedule(
      new webdriver.Command(webdriver.CommandName.IMPLICITLY_WAIT).
          setParameter('ms', ms < 0 ? 0 : ms),
      'WebDriver.manage().timeouts().implicitlyWait(' + ms + ')');
};

Try doing some javascript magic to override this method.