How to switch to child window of a child window in Selenium(Window handles and titles are dynamic)?

Question

In one application, there is a child window, which opens another window. In total there are three windows. The window handles and the titles of each window are dynamic, they change every session.

So I stored the handles of the parent window and the first child window, then I called getWindowHandles method, stored all handles in a set, removed parent window and first child window. The remaining window handle in the set will be the third window handle.

Set<String> windowHandles = uiDriver().getDriver().getWindowHandles(); windowHandles.remove(parentHandle); windowHandles.remove(firstChildHanlde); String thirdChildHandle = windowHandles.toString();

It would be of great help if you can help me on how to get the child window handle in a more convenient way.

You could also keep track of handles with your own arraylist and use contains() to add new handles when iterating through the set. If your array does not contain it, you add it. — browsermator
– browsermator, Commented Dec 16, 2019 at 22:55
@pcalkins Thanks for the suggestion, having an array list is more convenient as I could store the handles in order and get a specific handle using the index — Vinay Kumar
– Vinay Kumar, Commented Dec 17, 2019 at 5:39

JeffC · Accepted Answer · 2019-12-17 14:22:40Z

For a more generic method of handling windows handles you can get the Set of windows handles before you perform some action that opens more windows, perform the action, then get the Set of window handles afterwards, and then remove the "before" Set from the "after" Set. What remains are the windows that were opened during the action.

Set<String> beforeWindowHandles = uiDriver().getDriver().getWindowHandles(); // do something that opens a window Set<String> afterWindowHandles = uiDriver().getDriver().getWindowHandles(); afterWindowHandles.removeAll(beforeWindowHandles);

Now afterWindowHandles contains only the newly opened windows.

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