Android Tests: java.lang.ClassNotFoundException

Question

I have created this android test:

package fr.tisseo.android.repository.productlocalization.tests

import androidx.test.internal.runner.junit4.AndroidJUnit4ClassRunner
import org.junit.Test
import org.junit.runner.RunWith

@RunWith(AndroidJUnit4ClassRunner::class)
class TodeleteTest {
    @Test
    fun testTodelete(){
        Assert.assertTrue(true)
    }
}

I have this gradle configuration:

defaultConfig {
    ...
    testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}

//Unit testing
testImplementation 'junit:junit:4.13.1'
androidTestImplementation 'androidx.test:runner:1.3.0'
androidTestImplementation 'androidx.test:rules:1.3.0'

When I'm running my test, I have this error:

$ adb shell am instrument -w -r -e debug false -e class 'fr.tisseo.android.repository.productlocalization.tests.TodeleteTest' fr.tisseo.android.debug.test/androidx.test.runner.AndroidJUnitRunner Connected to process 27190 on device 'google-pixel_3-89KX0AP57'.

Started running tests

java.lang.ClassNotFoundException: fr.tisseo.android.repository.productlocalization.tests.TodeleteTest

What did I missed during my implemantation?

Answer 1

I had a similar issue launching the AndroidTest target.

Caused by: java.lang.ClassNotFoundException: Didn't find class .... on path: DexPathList[[zip file

I used Kotlin source code too. Adding apply plugin: 'kotlin-android' to the Gradle configuration file solved my issue.

apply plugin: 'com.android.library'
apply plugin: 'kotlin-android'

...