Kotlin class file can not run in IntelliJ for JUnit

Question

I am an Android and iOS developer. I am new in Kotlin Programming language with IntelliJ. Java class run well with but kotlin class showing err on run time. First it was showing err related JUnit version. I googled and found solution that need to config unit test.

I am using mac so I press Command + Shift + T to configure unit test.

After that when I run the MySecondClass.kt it's showing err like this

Information:Kotlin: kotlinc-jvm 1.1.3-2 (JRE 1.8.0_111-b14)
Information:7/10/17, 8:24 PM - Compilation completed with 2 errors and 0 warnings in 2s 85ms
/Users/ehaque/IdeaProjects/My First Kotlin Project/src/MySecondClassTest.kt
Error:(1, 12) Kotlin: Unresolved reference: junit
Error:(7, 10) Kotlin: Unresolved reference: junit

My Project Structure is like this:

What should I do?

Answer 1

You probably chose the wrong testing library version in the create test dialog.

It seems you are trying to use JUnit5, but you must have selected JUnit3. The import for the former starts org.junit.jupiter whereas the latter starts with junit , which you see in the error that you gave in the question.

Unresolved reference: junit