Change manifestPlaceholders in androidTest manifest

Issue

I have got manifest placeholder for service:

<service
        android:name=".MyService"
        android:process="${processName}">

In my build.gradle I replaced it.

android {  
    defaultConfig {
        manifestPlaceholders = [
                processName: ':Proc'
        ]
    }
}

But for my espresso tests (androidTest) I need empty value in the processName. How can I do this?

I have tried to do this with buildTypes, but it doesn't work (BuildType names cannot start with "androidTest")

Solution

This example works for me with Gradle plugin 3.4.1:

android {
    unitTestVariants.all {
        it.mergedFlavor.manifestPlaceholders += [
                placeHolderName: "placeHolderValue"
        ]

        it.mergedFlavor.addResValue(new ClassFieldImpl("string", "resValueName", "resValueValue"))
    }
}

Answered By - HotIceCream