Unresolved reference: junit

I'm writing game using Kotlin and LibGDX framework. I'm new to testing. I have passed some basic tutorial how to create simple test. And how to configure gradle. I just clicked on class and choose create test.

But, when i try to build project i get an error:

e: /Users/maximternovtsi/bagel/core/src/test/test/BagelTest.kt: (1, 12): Unresolved reference: junit
e: /Users/maximternovtsi/bagel/core/src/test/test/BagelTest.kt: (2, 12): Unresolved reference: junit
e: /Users/maximternovtsi/bagel/core/src/test/test/BagelTest.kt: (6, 6): Unresolved reference: Test
e: /Users/maximternovtsi/bagel/core/src/test/test/BagelTest.kt: (8, 9): Unresolved reference: Assertions
e: /Users/maximternovtsi/bagel/core/src/test/test/BagelTest.kt: (11, 6): Unresolved reference: Test
e: /Users/maximternovtsi/bagel/core/src/test/test/BagelTest.kt: (13, 9): Unresolved reference: Assertions

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':core:compileKotlin'.

BagelTest looks like this:


import org.junit.jupiter.api.Test

import org.junit.jupiter.api.BeforeEach


internal class BagelTest {


@BeforeEach
internal fun setUp() {
}

@Test
internal fun passes() {
assert(true)
}
}

I guess that gradle doesn't see junit, but i followed all instructions. Maybe i missed something.



buildscript {
repositories {

jcenter()
google()
}
dependencies {
classpath 'com.android.tools.build:gradle:3.0.0'
classpath 'org.multi-os-engine:moe-gradle:1.4.0'
classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.1.51"
}
}

allprojects {
apply plugin: "eclipse"
apply plugin: "idea"

version = '1.0'
ext {
appName = "Bagel"
gdxVersion = '1.9.8'
junitJupiterVersion = '5.0.2'
}

repositories {
mavenLocal()
mavenCentral()
maven { url "https://oss.sonatype.org/content/repositories/snapshots/" }
maven { url "https://oss.sonatype.org/content/repositories/releases/" }
}
}

project(":desktop") {
apply plugin: "kotlin"

dependencies {
compile project(":core")
compile "com.badlogicgames.gdx:gdx-backend-lwjgl:$gdxVersion"
compile "com.badlogicgames.gdx:gdx-platform:$gdxVersion:natives-desktop"
compile "com.badlogicgames.gdx:gdx-box2d-platform:$gdxVersion:natives-desktop"
compile "com.badlogicgames.gdx:gdx-freetype-platform:$gdxVersion:natives-desktop"
}
}

project(":android") {
apply plugin: "android"
apply plugin: "kotlin-android"

configurations { natives }

dependencies {
compile project(":core")
compile "org.jetbrains.kotlin:kotlin-stdlib:1.1.51"
compile "com.badlogicgames.gdx:gdx-backend-android:$gdxVersion"
natives "com.badlogicgames.gdx:gdx-platform:$gdxVersion:natives-armeabi"
natives "com.badlogicgames.gdx:gdx-platform:$gdxVersion:natives-armeabi-v7a"
natives "com.badlogicgames.gdx:gdx-platform:$gdxVersion:natives-arm64-v8a"
natives "com.badlogicgames.gdx:gdx-platform:$gdxVersion:natives-x86"
natives "com.badlogicgames.gdx:gdx-platform:$gdxVersion:natives-x86_64"
compile "com.badlogicgames.gdx:gdx-box2d:$gdxVersion"
natives "com.badlogicgames.gdx:gdx-box2d-platform:$gdxVersion:natives-armeabi"
natives "com.badlogicgames.gdx:gdx-box2d-platform:$gdxVersion:natives-armeabi-v7a"
natives "com.badlogicgames.gdx:gdx-box2d-platform:$gdxVersion:natives-arm64-v8a"
natives "com.badlogicgames.gdx:gdx-box2d-platform:$gdxVersion:natives-x86"
natives "com.badlogicgames.gdx:gdx-box2d-platform:$gdxVersion:natives-x86_64"
compile "com.badlogicgames.gdx:gdx-freetype:$gdxVersion"
natives "com.badlogicgames.gdx:gdx-freetype-platform:$gdxVersion:natives-armeabi"
natives "com.badlogicgames.gdx:gdx-freetype-platform:$gdxVersion:natives-armeabi-v7a"
natives "com.badlogicgames.gdx:gdx-freetype-platform:$gdxVersion:natives-arm64-v8a"
natives "com.badlogicgames.gdx:gdx-freetype-platform:$gdxVersion:natives-x86"
natives "com.badlogicgames.gdx:gdx-freetype-platform:$gdxVersion:natives-x86_64"
}
}

project(":core") {
apply plugin: "kotlin"

/*kotlin {
experimental {
coroutines 'enable'
}
}*/

sourceSets.test.java.srcDirs = ["/test"]

dependencies {
compile "com.badlogicgames.gdx:gdx:$gdxVersion"
compile "com.badlogicgames.gdx:gdx-box2d:$gdxVersion"
compile "com.badlogicgames.gdx:gdx-freetype:$gdxVersion"
compile "org.jetbrains.kotlin:kotlin-stdlib:1.1.51"
compile "com.badlogicgames.ashley:ashley:1.7.3"

testCompile("org.junit.jupiter:junit-jupiter-api:${junitJupiterVersion}")
// testCompile "org.mockito:mockito-core:2.2.7"
}
}

tasks.eclipse.doLast {
delete ".project"
}

I've configured junit tests for libGdx+kotlin by following steps:

1. Create 'test' folder in the core project folder - it will be the root folder for test code files: [project-root]/core/test

2. Add junit dependencies in project main gradle.build file to the project(":core") section:

project(":core") {
....
dependencies {
...
testCompile 'junit:junit:4.12'
testCompile "org.jetbrains.kotlin:kotlin-test-junit:$kotlinVersion"
}
}

3. Add test source set in [project-root]/core/build.gradle file, right under the 'sourceSets.main.java.srcDirs = [ "src/" ]' line:

sourceSets.test.java.srcDirs = ["test/"]
4. Now the [project-root]/core/test folder will be highlighted with green, which means that this folder is recognized as test source directory. Now you can place there a .kt file with simple junut test, for example:

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

class SimpleTest{

@Test
fun testEquals(){
var b=true
assertEquals(true,b)
}
}

You should:

1) remove `internal` word - it is not required

2) using simple `assert` method in tests is wrong - use methonds from `org.junit.Assert.*`

In my case problem was I didn't import

androidTestImplementation "org.jetbrains.kotlin:kotlin-test-junit:$kotlin_version"

Update May 2020: This should be placed in build.gradle's `dependencies { }`. As of Android Studio version 4 and current gradle version, the variable should be named $*version_kotlin* for gradle to properly re-sync.

I am using Android Studio 4.0 version and there is (test) package already in the android project it's a default package , I have put my kotlin test file there and there is no problem with it. I didn't run the file yet but there are no import errors for junit etc. I hope this is helpful.

in app module's `build.gradle`

replace `testImplementation`
with
`androidTestImplementation`

First make sure that the kotlin version defined in `build.gradle.kts (project)` is the same as the [selected in the compiler][1].

plugins {
kotlin("jvm") version "1.4.21" apply false
}

If these versions are matting and still not working then proceed with the following steps:
___

1. Delete all cache folders including:

- .gradle
- .idea

2. Invalidate Caches / Restart...

3. Open any gradle file (settings.gradle.kts)

4. In the IDE at the top right click in `Link Gradle project`

[![Link Gradle project][2]][2]

5. Finally, specifies that JUnit 5 should be used to execute the tests

### build.gradle.kts

tasks.test {
useJUnitPlatform()
}

_Note_: This behavior can be defined [by gradle][3] or [from the IDE][4]
___


It is very likely that if it worked and you have the dependencies it is a cache problem or gradle configuration.

GL


[1]:

[To see links please register here]

[2]:

[3]:

[To see links please register here]

[4]:

[To see links please register here]