add `windowById` helper

as @kevinsawicki points out here https://github.com/electron/spectron/issues/6:

ChromeDriver seems to treat each <webview> tag as a separate window so you should be able to use the windowByIndex helper to focus a webview by location in the DOM and then you can call other helpers and it will be scoped to that window.

if you have multiple webviews, then working with just the index is very error prone. Would it be possible get the webview based on its id? Something like: windowById('#my-webview)?

Or could we maybe already achieve this with a couple of promises? I tried but couldn’t make it work. Any idea’s?

[gautaz]

I am also having the same issue.

Currently I am locating a particular element’s id contained by the targeted webview by iterating over all window handles.

I’m using something like that:

const selectWindow = async function(app, selector) {
  const handles = await app.client.windowHandles();
  for (const handle of handles.value) {
    await app.client.window(handle);
    const element = await app.client.element(selector);
    if (element.status === 0) {
      return element;
    }
  }
  return {};
};

But processing this way seems rather awkward, inefficient and also error prone (duplicate element ids in two different webviews is authorised).

webdriverio window() call is able to retrieve a window by using the tab name attribute but I do not know if there is a way to associate a tab name to a webview element.

[kevinsawicki]

I am pretty sure that you are already a lot busy with all the other issues but perhaps can you come up with a better work around than the current one ?

Nothing I can think of initially but I think something could be added, will have to investigate further.