Error with driver.switchTo().window() complaining that something isn't a string when it is

Question

TL;DR

I give my function a string. It complains that what I gave it isn't a string.

---

My code:

new WebDriverWait(driver, 5).until(ExpectedConditions.numberOfWindowsToBe(1));  //induce WebDriverWait
System.out.println(driver.getWindowHandle());
String nameWindow = driver.getWindowHandle();
driver.switchTo().window(nameWindow);// Force Focus
element.click();

What the System.out.println() return: CDwindow-0

The error message I get:

The code fail with the line driver.switchTo().window(nameWindow);. Here is the error message:

org.openqa.selenium.InvalidArgumentException: invalid argument: 'name' must be a string
  (Session info: chrome=83.0.4103.106)
  (Driver info: chromedriver=83.0.4103.14 (be04594a2b8411758b860104bc0a1033417178be-refs/branch-heads/4103@{#119}),platform=Linux 4.15.0-52-generic x86_64) (WARNING: The server did not provide any stacktrace information)
Command duration or timeout: 0 milliseconds
Build info: version: '3.141.59', revision: 'e82be7d358', time: '2018-11-14T08:17:03'
System info: host: 'PC-ABCD', ip: '192.168.224.31', os.name: 'Windows 10', os.arch: 'amd64', os.version: '10.0', java.version: '1.8.0_191'
Driver info: io.appium.java_client.android.AndroidDriver
Capabilities {browserName: Chrome, chromeOptions: {args: [--proxy-server=10.0.2.2:8080, --proxy-bypass-list=<-loopb...]}, databaseEnabled: false, desired: {browserName: Chrome, chromeOptions: {args: [--proxy-server=10.0.2.2:8080, --proxy-bypass-list=<-loopb...]}, deviceName: Galaxy S9, deviceReadyTimeout: 120, fullReset: false, headless: false, launchTimeout: 300, nativeWebScreenshot: true, newCommandTimeout: 300, performance: false, platform: ANY, platformName: Android, platformVersion: 8, shutdownOtherSimulators: true, useNewWDA: true, waitForQuiescence: false, wdaLaunchTimeout: 120000}, deviceManufacturer: Google, deviceModel: Android SDK built for x86, deviceName: emulator-5554, deviceReadyTimeout: 120, deviceScreenSize: 1440x2960, deviceUDID: emulator-5554, fullReset: false, headless: false, javascriptEnabled: true, launchTimeout: 300, locationContextEnabled: false, nativeWebScreenshot: true, networkConnectionEnabled: true, newCommandTimeout: 300, performance: false, platform: ANY, platformName: Android, platformVersion: 8.0.0, shutdownOtherSimulators: true, takesScreenshot: true, useNewWDA: true, waitForQuiescence: false, warnings: {}, wdaLaunchTimeout: 120000, webStorageEnabled: false}
Session ID: 15a42994-07c0-426c-b811-c502c48e4e7d
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:214)
    at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:166)
    at org.openqa.selenium.remote.http.JsonHttpResponseCodec.reconstructValue(JsonHttpResponseCodec.java:40)
    at org.openqa.selenium.remote.http.AbstractHttpResponseCodec.decode(AbstractHttpResponseCodec.java:80)
    at org.openqa.selenium.remote.http.AbstractHttpResponseCodec.decode(AbstractHttpResponseCodec.java:44)
    at org.openqa.selenium.remote.HttpCommandExecutor.execute(HttpCommandExecutor.java:158)
    at io.appium.java_client.remote.AppiumCommandExecutor.execute(AppiumCommandExecutor.java:239)
    at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:552)
    at io.appium.java_client.DefaultGenericMobileDriver.execute(DefaultGenericMobileDriver.java:41)
    at io.appium.java_client.AppiumDriver.execute(AppiumDriver.java:1)
    at io.appium.java_client.android.AndroidDriver.execute(AndroidDriver.java:1)
    at org.openqa.selenium.remote.RemoteWebDriver$RemoteTargetLocator.window(RemoteWebDriver.java:903)
    at souscription.Stepdefs.iClickOnElement(Stepdefs.java:560)

What I tried to fix it:

new WebDriverWait(driver, 5).until(ExpectedConditions.numberOfWindowsToBe(1));  //induce WebDriverWait
try {
    Thread.sleep(500);
} catch (InterruptedException e) {
    e.printStackTrace();
}
System.out.println(driver.getWindowHandle());
String nameWindow = driver.getWindowHandle();
driver.switchTo().window("CDwindow-0");// Force Focus
element.click();

But I still get the very same error message. Even though I am literally given the function a string.

My configuration:

Java "1.8.0_191", Selenium 3.141.59, Appium Java client 7.3.0, Appium 1.11.1, Android Galaxy S9

Question:

Any idea how I can fix that? I need to make sure that I have the right window in focus before making my click and if the "switchTo" doesn't work, that's an issue.

Answer 1

Try to update your Appium build. Here is the issue discussed. Seems that you have old Appium. The latest one is 1.20.2.

The problem is how Appium proxies the request from the Java client to the actual web driver. The latest version has to have this fixed.

Answer 2

https://github.com/appium/java-client/issues/970

forceMjsonwp:true

could you try in set capabiities?

capabilities.setCapability("forceMjsonwp ", true)

it seems an issue with chrome , you can try updating chrome or forcing appium to use JSON wire protocol instead of w3c

Answer 3

You can use the next lines to switch window:

ArrayList "Objetc (windows)" = new ArrayList(driver.getWindowHandles()); "webDriver".swithchTo().window(objeto.get("WindowNumber").toString());