SerenityBDD, Cucumber, and Multiple Devices

By Default, Serenity does not provide a way to assign a specific driver configuration to a specific actor when using Cucumber. For example, when testing a chat application. One user is on Desktop, the other is on Mobile. This project shows my approach to using multiple devices with SerenityBDD.

Serenity.conf

I've added a new section in serenity.conf called devices. This is a collection of driver configurations. Each entry can contain any driver configs you would normally place on the root of serenity.conf

devices {
    pixel3 {
        webdriver.remote.driver = appium
        browserstack {
            osVersion = "10.0"
            deviceName = "Google Pixel 3"
        }
        appium {
            platformName = Android
            browserName = chrome
        }
    }
    win10chrome {
        webdriver.remote.driver = chrome

        browserstack {
            os = "Windows"
            osVersion = "10"
            browserVersion = latest
            browserName = chrome
        }
    }
    all {
        #place any configs you want to apply to all devices here
    }
}

you may assign these devices to a particular role using the format:

roles.{roleName}.device = {deviceName}

e.g. roles.sandra.device = pixel3

DeviceConfiguration

This is where the magic happens. This object reads the device config from serenity.conf and returns a WebDriver

WebDriver driverFromRole = DeviceConfiguration.from(environmentVariables).getDriverForRole("sandra");
WebDriver driverFromDeviceName = DeviceConfiguration.from(environmentVariables).getDriverForDevice("win10chrome");

MultiDeviceCast

this cast will create a driver based on the actor/role name

    @Before
    public void setTheStage() {
        OnStage.setTheStage(new MultiDeviceCast());
    }

I have a Parameter definition that allows me to easily convert my actor names to cast members

    @ParameterType(".*")
    public Actor actor(String actorName) {
        return OnStage.theActorCalled(actorName);
    }

When this is called it will use the appropriately configured driver based on the name

Putting it all together

My Feature file is like this:

  Scenario: Sandra messages Sergey
    Given Sergey is a non-registered user
    And Sandra is a non-registered user
    When she messages 'Sergey' with the text 'hello'
    Then Sergey sees a message from 'Sally' with the text 'hello'

The specified actor names are important as they determine the driver to be used for that step these names can be whatever you've specified under serenity.conf under roles.{actorName}.device

Notes

• If you're using remote devices be sure to place webdriver.remote.url on the root of serenity.conf
• If you're using browserstack be sure to place the user, key, and server configs on the root of serenity.conf
• I have not tested this with SauceLabs
• I hastily built this sample. The primary goal was to show how you could configure multiple devices but there are likely issues.