How to use code in androidTest directory of another module

Question

I add two modules in my AndroidStudio project:

app-base
|
|----src
      |____androidTest
                |________MyTestBase.java          

app
|
|----src
      |____androidTest
                |________MyTest.java

Some common test class are defined in app-base's androidTest, and are used in app'androidTest.

I have tried to add the following code in app's build.gradle:

    evaluationDependsOn(':app-base')

    compile project(':app-base')

    androidTestCompile project(':app-base')

I have include both app-base and app in settings.gradle, the output of gradlew projects is:

Root project 'MyProject'
+--- Project ':app-base' 
+--- Project ':app'

No compile error by this way, but when I Run MyTest in ide, it said class MyTestBase is not found.

Do you know what's wrong? Any ideas are appreciated. Thanks.

Answer 1

I've been looking for a solution to this for a while and finally found something that works for me.

This will allow you to put common testing classes in another module.

android {
    ...

    sourceSets {
        androidTest.java.srcDirs += ["${project('match the module name that is currently in the dependencies').projectDir}/src/androidTest/java"]
    }
}

So for the example above it would probably look something like

androidTest.java.srcDirs += ["${project(':appbase').projectDir}/src/androidTest/java"]

Answer 2

I suggest you the following strategy : create a new module test-utils and put MyTestBase.java in the main sources of this module.

test-utils
|
|----src
      |____main
             |________MyTestBase.java

Then you add this test-utils as a test dependency in all modules where it is required

androidTestCompile project(':test-utils')

Answer 3

With little change in Stimsoni's answer, this is finally worked for me. I added this to my app gradle:

sourceSets {
    test.java.srcDirs += ["${project(':app-base').projectDir}/src/test/java"]
}