Android Studio : Cannot use class from src in Unit tests

Question

since the last Update (of Android Studio ? or Gradle ?) I cannot import code from prod in my tests classes.

A few months ago, the tests were working without any problems. I can launch the tests, using gradle in command line, or using AndroidStudio test runner. And it work nice : it passes when the code is ok, it fails when there is a bug.

But the auto-completion isn't working, the class, methods ... are red. I cannot click on an object to navigate to the declaration ... and so on.

And the AndroidStudio automatic quickfix is : "add dependency on module xxx" which add a line in the gradle file : implementation project(path: ':app')

I have the same problem on several project, with gradle 6.1.1 or 7.2.1

AndroidStudio version is : Chipmunk, 2021.2.1 patch 1 built on May 18 2022

the unit test, in app/src/test/java/com/apackage/ASimpleTest.kt

package com.apackage


import org.junit.Test
import kotlin.test.assertEquals

class ASimpleTest {

    @Test
    fun aTest(){

        val plop = AClass()
        assertEquals(1, plop.aMethod())
    }
}

the class in app/src/main/java/com/apackage/AClass.kt:

package com.apackage

class AClass {
    fun aMethod() = 1
}

I have no problem calling a method in the same folder as the tests. The problem is test/main folder calling src/main

Answer 1

You got to add the 'src/test/java' and 'src/main/java' to the sourceSets in your app build.gradle

android {
    // Other configuration options...

    sourceSets {
        test {
            java.srcDirs = ['src/test/java', 'src/main/java']
        }
    }
}