Multi module project Instrumentation test code coverage in non 'app' modules

I have a project structue like:

--app

--module2 //library module

--module3 //library module

I am writing instrumentation test cases for my multi module android project with jacoco code coverage. If I execute the instrumentation test cases from 'app' module, code coverage is only generated for 'app' module classes.

So, in order to get code coverage for 'module2' & 'module3' classes; I have written instrumentation test cases in respective modules.

Issue arises when I execute instrumentation test cases in non-app modules, am unable to launch the main activity, app is not launching during instrumentation and test cases are failing.

Root cause is:

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

@Rule is not declared in 'module2' & 'module3' which launch 'MainActivity.class'. I cannot import 'MainActiviy' to these modules because of some circular dependency issues.

Error:

java.lang.RuntimeException: No activities found. Did you forget to launch the activity by calling getActivity() or startActivitySync or similar?

How to tackle this ?

NB: This question is exclusively for instrumentation test, not for unit test(this is already handled in unit tests)

Similiar question

I have followed this anwer and changed the gradle task according to my requirments. Adding the gradle task for reference.

 task jacocoUiTestReportAllModules(type: JacocoReport, dependsOn: 'createDebugCoverageReport') {
    group "Reports"
    description "Generate Jacoco Instrumented Tests coverage reports for all modules"
    reports {
        xml.enabled = true
        html.enabled = true
        html.destination file("${rootProject.buildDir}/coverage-report")
    }
    def javaClasses = []
    def kotlinClasses = []
    def javaSrc = []
    def kotlinSrc = []
    def execution = []
    rootProject.subprojects.each { proj ->
        javaClasses << fileTree(dir: "$proj.buildDir/intermediates/javac/debug", excludes: fileFilter)
        kotlinClasses << fileTree(dir: "$proj.buildDir/tmp/kotlin-classes/debug", excludes: fileFilter)
        javaSrc << "$proj.projectDir/src/main/java"
        kotlinSrc << "$proj.projectDir/src/main/kotlin"
        execution << fileTree(dir: proj.buildDir, includes: [
                'outputs/code_coverage/debugAndroidTest/connected/**/*.ec'])
    }
    getSourceDirectories().setFrom(files([javaSrc, kotlinSrc]))
    getClassDirectories().setFrom(files([javaClasses, kotlinClasses]))
    getExecutionData().setFrom(execution)

    doLast() {
        print "file://${reports.html.destination}/index.html"

    }
}

After running gradlew jacocoUiTestReportAllModules the report with full coverage will be present in [projRoot]/build/coverage-report.