Type Android Junit4 not present exception

I have an Android project that I am trying to run Instrumentation tests for using AndroidStudio, but when I try to run the whole class file for the tests, I get the exceptions as stated below :

java.lang.TypeNotPresentException: Type android.support.test.runner.AndroidJUnit4 not present
Caused by: java.lang.ClassNotFoundException: android.support.test.runner.AndroidJUnit4

Interestingly, I can run individual methods in this Instrument Test class, just not the whole class. My build.gradle file for the app is below:

apply plugin: 'com.android.application'

apply plugin: 'kotlin-android'

apply plugin: 'kotlin-android-extensions'

android {
    lintOptions {
        abortOnError false
    }
    compileSdkVersion 28
    defaultConfig {
        applicationId "com.sarpuner.journal"
        minSdkVersion 19
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    buildToolsVersion '27.0.3'
}

repositories {
    maven { url "https://dl.bintray.com/ijabz/maven" }
}

dependencies {
    androidTestImplementation 'com.android.support:support-annotations:27.1.1'
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    implementation 'com.android.support:appcompat-v7:28.0.0-rc01'
    implementation 'com.android.support.constraint:constraint-layout:1.1.2'
    implementation 'dev.dworks.libs:volleyplus:0.1.4'
    implementation 'com.google.code.gson:gson:2.8.2'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:rules:1.0.2'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
    implementation 'org.jsoup:jsoup:1.11.3'
    testImplementation 'org.junit.jupiter:junit-jupiter-api:5.1.1'
    implementation 'net.jthink:jaudiotagger:2.2.3'
    api 'com.google.guava:guava:26.0-android'
}

And the InstrumentTest class is as follows:

package com.sarpuner.journal

import android.support.test.InstrumentationRegistry
import android.support.test.runner.AndroidJUnit4
import android.util.Log    
import org.junit.Test
import org.junit.runner.RunWith    
import org.junit.Assert.*
import java.io.File

private const val INSTRUMENT_TAG = "InstrumentTest"

// TODO: There is a problem here with the class run!

@RunWith(AndroidJUnit4::class)
class ExampleInstrumentedTest {

    private val appContext = InstrumentationRegistry.getTargetContext()

    @Test
    fun useAppContext() {
        // Context of the app under test.
        assertEquals("com.sarpuner.journal", appContext.packageName)
    }

    @Test
    fun downloadAndSaveAudio() {
        val url = "http://telechargement.rfi.fr/rfi/francais/audio/jff/201808/journal_francais_facile_20h00_-_20h10_tu_20180809.mp3"
        val name = "09-08-2018.mp3"
        val f = File(appContext.filesDir, name)
        Log.d(INSTRUMENT_TAG, f.absolutePath)
        downloadAudio(url, f)
    }

    @Test
    fun downloadAndSaveTranscript() {
        val url = "https://savoirs.rfi.fr/fr/apprendre-enseigner/langue-francaise/journal-en-francais-facile-09082018-20h00-gmt"
        val name = "09-08-2018.txt"
        val f = File(appContext.filesDir, name)

        downloadText(url, f)
    }

    @Test
    fun addLyricsToAudio() {

    }
}

Any help/guidance is much appreciated, thank you.

回答1:

This is caused by Android Studio trying to execute an instrumentation test as a JUnit test.

I had to go to 'Edit Configurations...' and delete the configuration from Android JUnit group and manually add to the 'Android Instrumented Tests' group. After this I had no problem executing the tests.

回答2:

Hopefully someone can give you a better answer as to why, but I had this exact same problem. I did the following:

Build > Clean Project,
Ran the app on the emulator

This done, I was able to get back into a state where I could run the tests again.

回答3:

I had the same with:

Type androidx.test.ext.junit.runners.AndroidJUnit4 not present

I tried a lot of things before manually removing the App from the device and running the test again. Hope this helps!