How to rotate activity, I mean: screen orientation change using Espresso?

Question

I have decided that one of the testing criteria for my application tests with Google's Espresso is:

Test should maintain Activity state after screen orientation rotation

How do I rotate the screen when using Espresso?

I have tried the following Robotium code (Yes I placed Robotium code in my Espresso test so sue me)

solo.setActivityOrientation(solo.LANDSCAPE); solo.setActivityOrientation(solo.PORTRAIT); 

but It crashes the application when I run it within my Espresso test.
Is there any way to do this?

Thanks in advance for any help

Answer 1

If you have the only Activity in your test case, you can do:

1. Declare you test Rule.

@Rule public ActivityTestRule<TestActivity> mActivityTestRule = new ActivityTestRule<>(TestActivity.class); 

2. Get you Activity and apply a screen rotation.

mActivityTestRule.getActivity().setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE); mActivityTestRule.getActivity().setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT); 

That's a piece of pie!

Answer 2

You can do it with uiautomator library

dependencies {   androidTestImplementation 'androidx.test.uiautomator:uiautomator:2.2.0'  } 

ui automator require min sdk version 18 so if your app has a lower min sdk you need to create a new AndroidManifest.xml in androidTest folder

<?xml version="1.0" encoding="utf-8"?> <manifest     xmlns:tools="http://schemas.android.com/tools"     package="your.package.name">     <uses-sdk tools:overrideLibrary="android.support.test.uiautomator.v18"/> </manifest> 

and then in your test

UiDevice device = UiDevice.getInstance(getInstrumentation());  device.setOrientationLeft(); device.setOrientationNatural(); device.setOrientationRight();