Using Espresso for Virtual Device Testing

Espresso is a native testing framework for running user interface tests on Android devices. Sauce Labs offers the option to run Espresso tests against emulators in our testing cloud with Sauce Runner for Virtual Devices. 

Requirements

Supported Espresso Package Versions

Max Test Execution Time

Recommended maximum execution time for Espresso jobs is 1 hour, however the emulators are capable of running Espresso jobs for 3 hours, and are shutdown after 3 hours.

Configuring Sauce Runner for Virtual Devices for Espresso Testing

The Command Reference for Sauce Runner for Virtual Devices contains a list of the options you can use to configure Sauce Runner to run tests with Espresso.

Emulator Settings for Espresso Tests

Following Google's recommendation to avoid flakey tests, we disable system animations on emulators during Espresso tests. Specifically the following three system animations are disabled:

• Window animation scale
• Transition animation scale
• Animator duration scale

Other Topics

Other topics in this section include:

• Troubleshooting Espresso Testing for Virtual Devices
• Example Espresso Tests for a React-Native App on Virtual Devices