How to manage Runtime permissions android marshmallow espresso tests

Question

I'm using espresso for testing but sometimes I try to get an image form external storage and with marshmallow I need a Runtime permission otherwise there will be an Exception crash and the test will fail.

androidTestCompile 'com.android.support.test:runner:0.4'
androidTestCompile 'com.android.support.test:rules:0.4'
androidTestCompile 'com.android.support.test.espresso:espresso-core:2.2.1'
androidTestCompile 'com.android.support.test.espresso:espresso-intents:2.2.1'
androidTestCompile('com.android.support.test.espresso:espresso-contrib:2.2.1') {
    // this library uses the newest app compat v22 but the espresso contrib still v21.
    // you have to specifically exclude the older versions of the contrib library or
    // there will be some conflicts
    exclude group: 'com.android.support', module: 'appcompat'
    exclude group: 'com.android.support', module: 'support-v4'
    exclude module: 'recyclerview-v7'
}
androidTestCompile 'junit:junit:4.12'
androidTestCompile 'com.squareup.retrofit:retrofit-mock:1.9.0'
androidTestCompile 'com.squareup.assertj:assertj-android:1.1.0'
androidTestCompile 'com.squareup.spoon:spoon-client:1.2.0'

how can I manage that right?

should I write test for Runtime permissions or there's a way to disable it for testing?

should I give permissions before the tests run like she says here? https://www.youtube.com/watch?list=PLWz5rJ2EKKc-lJo_RGGXL2Psr8vVCTWjM&v=C8lUdPVSzDk

Answer 1

You can create an Android gradle task to grant permission:

android.applicationVariants.all { variant ->
    def applicationId = variant.applicationId
    def adb = android.getAdbExe().toString()
    def variantName = variant.name.capitalize()
    def grantPermissionTask = tasks.create("grant${variantName}Permissions") << {
        "${adb} devices".execute().text.eachLine {
            if (it.endsWith("device")){
                def device = it.split()[0]
                println "Granting permissions on devices ${device}"
                "${adb} -s ${device} shell pm grant ${applicationId} android.permission.CAMERA".execute()
                "${adb} -s ${device} shell pm grant ${applicationId} android.permission.ACCESS_FINE_LOCATION".execute()
            }
        }
    }
}

And this is the command to run the task: gradle grantDebugPermissions