Unresolved reference: junit

Question

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"
}

Are you sure gradle has actually downloaded junit? Try running ./gradlew --refresh-dependencies in the command line to tell it to recheck those dependencies. — John
– John, Commented Dec 19, 2017 at 22:04
Did you try putting BagelTest.kt in /core/src/test/kotlin/? — JK Ly
– JK Ly, Commented Dec 20, 2017 at 13:04
Make sure that your test folder is in the main folder of the project. — Bolling
– Bolling, Commented Feb 20, 2020 at 9:52
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. — AdiAtAnd
– AdiAtAnd, Commented Aug 17, 2020 at 13:41

elenatres · Accepted Answer · 2018-02-07 08:32:07Z

9

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

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

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"
   }
 }

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/"]
```
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)
    }
}
```

answered Feb 7, 2018 at 8:32

elenatres

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2 Comments

AdiAtAnd Over a year ago

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.

JCarlosR Over a year ago

testCompile is deprecated, should be replaced with testImplementation

tripolon · Accepted Answer · 2020-05-30 20:55:13Z

9

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.

edited May 30, 2020 at 20:55

tripolon

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answered Mar 18, 2019 at 9:51

Nicola Gallazzi

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Comments

ir2pid · Accepted Answer · 2021-02-10 12:30:45Z

3

in app module's build.gradle

replace testImplementation with androidTestImplementation

edited Feb 10, 2021 at 12:30

answered Nov 13, 2020 at 19:03

ir2pid

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Comments

Braian Coronel · Accepted Answer · 2021-02-21 19:43:55Z

1

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

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

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

Delete all cache folders including:
- .gradle
- .idea
Invalidate Caches / Restart...
Open any gradle file (settings.gradle.kts)
In the IDE at the top right click in Link Gradle project

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 or from the IDE

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

GL

edited Feb 21, 2021 at 19:43

answered Feb 19, 2021 at 23:33

Braian Coronel

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1 Comment

Valerij Dobler Over a year ago

Invalidating Caches didn't worked for me, but deleting .gradle, .idea and the build folder. Thank you!

Constantin Chernishov · Accepted Answer · 2018-02-07 15:02:28Z

0

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.*

answered Feb 7, 2018 at 15:02

Constantin Chernishov

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Comments

AdiAtAnd · Accepted Answer · 2020-08-17 13:42:24Z

0

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.

answered Aug 17, 2020 at 13:42

AdiAtAnd

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