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SwitchTo or Window handle is failing when it is executed through webdriver.io

See original GitHub issue

The problem

When we perform a switchTo or window operations from webdriver.io, the POST call made to appium server contains two parameters {"name":"1","handle":"1"}. And appium servers are throwing an error back saying Parameters were incorrect. We wanted {"required":["name"]} and you sent ["name","handle"].

Environment

Appium Version: 1.7.2 Mac OS : 10.12.6 Node: 8.6.0 Mobile device: iPhone 7(real device) with OS 11.2.6

Details

When we make an switchTo or Window handle from webdriver.io, then it passes the below params to appium server: Logs:

[21:40:08]  COMMAND	GET 	 "/wd/hub/session/00353d5d-b470-43da-9e56-19e2dc603f4c/window_handles"
[21:40:08]  DATA		{}
[21:40:08]  RESULT		["1"]
[21:40:08]  COMMAND	POST 	 "/wd/hub/session/00353d5d-b470-43da-9e56-19e2dc603f4c/window"
[21:40:08]  DATA		{"name":"1","handle":"1"}

When it reached the appium server, i can see the below logs:

[HTTP] --> POST /wd/hub/session/00353d5d-b470-43da-9e56-19e2dc603f4c/window {"name":"1","handle":"1"}
[debug] [MJSONWP] Bad parameters: BadParametersError: Parameters were incorrect. We wanted {"required":["name"]} and you sent ["name","handle"]
[HTTP] <-- POST /wd/hub/session/00353d5d-b470-43da-9e56-19e2dc603f4c/window 400 2 ms - 89

So it looks like, appium server is so strict that it accepts only name.

Here is the simple sample code to switchTo a window in wdio:

var wins = browser.windowHandles();
        console.log('WINDOWS: ' + wins.value.length);
        console.log('WINDOWS: ' + wins.value[0]);
        for(let i=0; i<wins.value.length; i++){
            browser.window(wins.value[i]);
            console.log('A switch is performed');
        }

NOTE: The same switching windows works fine through Java with selenium. There appium server gets only name in the params.

Thanks, Naveen.