JUnit test in Kotlin

Question

Warning: I'm a huge noob to TDD and Kotlin.

I've found good code snippets on the web for writing JUnit tests in Kotlin, but when I copy and paste, IntelliJ does not automagically import kotlin.test.* or org.junit.Test. Typically in Eclipse, when I copy and paste code snippets like this, the IDE can figure out where these libraries are in my underlying java install. Figured Kotlin/IntelliJ would be the same.

In the below screenshot, any idea why I cannot import test libraries? Do they need to be added explicitly to my path? Do I need to put these under a test, rather than the src folder?

Thanks

And hint: no need for a screenshot - you could as well just post the code and the error message as text ... just saying. — GhostCat, Feb 13 '17 at 19:47
Thanks, sometimes I think for questions involving an editor, it's easier to show the editor's color highlighting and so forth instead of just my code. — Adam Hughes, May 31 '17 at 13:32

score 6 · Accepted Answer · edited May 23 '17 at 12:25

6

JUnit isn't in your project classpath, so IntelliJ can't find it's packages.

Follow the steps outlined in this answer: Correct way to add external jars (lib/*.jar) to an IntelliJ IDEA project, choosing libraries and then junit.

edited May 23 '17 at 12:25

Community

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answered Feb 13 '17 at 19:40

Ricardo Meneghin Filho

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Hmm, so JUnit isn't something that's kind of "baked in" and visible to any new project? – Adam Hughes Feb 13 '17 at 19:41
@AdamHughes Why should that be? – GhostCat Feb 13 '17 at 19:48
Hmm, well I thought at least `kotlin.test` import would be standard. `junit` I guess it makes sense, but somehow I figured it'd be in the standard library. Guess I'm mistaken though, wouldn't be the first time. – Adam Hughes Feb 13 '17 at 19:48
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kotlin-test is a separate artifact as well: https://mvnrepository.com/artifact/org.jetbrains.kotlin/kotlin-test – Kirill Rakhman Feb 14 '17 at 09:09

JUnit test in Kotlin

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