Using Lambda Expression for switching windows in Selenium Using Java

Question

for (String winHandle : driver.getWindowHandles()) 
{
    driver.switchTo().window(winHandle); 
}

Can we rewrite this using Lambda Expression?

Is it really required to execute `driver.switchTo()` again in every loop iteration? If not, you can simply use `driver.getWindowHandles().forEach(driver.switchTo()::window)` — Holger, Feb 10 '17 at 17:38

score 2 · Answer 1 · edited May 23 '17 at 12:17

2

I would go for

driver.getWindowHandles().forEach(windowHandle -> {
    driver.switchTo().window(windowHandle);
});

which is equivalent to:

for(String windowHandle : driver.getWindowHandles()) {
    driver.switchTo().window(windowHandle);
}

forEach method calls can be used for Collections. You can go parallel with the usage of forEach together with parallelStream. Read further.

edited May 23 '17 at 12:17

Community

answered Feb 02 '17 at 10:59

score 0 · Answer 2 · answered Feb 02 '17 at 12:28

You can do it like

driver.getWindowHandles().stream().forEach((i) -> {
     driver.switchTo().window(i);
});

or like

driver.getWindowHandles().parallelStream().forEachOrdered((i) -> {
     driver.switchTo().window(i);
});

Stream api offers other possibilities that can make your life easier.

2 Answers2