Cannot Resolve Symbol "Scalatest"

Question

I am trying to use scalatest, but Intellij cannot recognize:

import org.scalatest._

Here is my build.sbt file, located in the same directory as my scalatest.jar file.

scalaVersion := "2.11.2"

libraryDependencies += "org.scalatest" % "scalatest_2.11" % "2.2.4" % "test"

Thanks

Answer 1

So you have by convention two source folders:

src/main/scala/...
src/test/scala/...

The first is shown blue, the second green in IntelliJ IDEA. The library dependencies in sbt are associated with either of these, so

"org.foo" % "bar_2.11" % "1.2.3"

Is a main dependency, available to main sources (and also test, because test depends on main). And

"org.foo" % "bar_2.11" % "1.2.3" % "test"

Is a test dependency, only available to test sources. The idea is that these are libraries which are not required for your product, but only to run the unit tests.

---

In your example, Scala-Test is only available to test sources, so trying to import it from main sources will fail.