Support test-in-src

[antholeole]

Hello! One feature that i'd like to have is to be able to write the source and the test in the same file - that way I can just write one off scripts without having to worry about keeping the test file next to the implementation file.

Something like the following:

//> using test.dep org.scalameta::munit::0.7.29

object Hello {
  def main(args: Array[String]): Unit = {
    println(addOne(3))
  }

  def addOne(x: Integer) = x + 1
}

  class HelloTest extends munit.FunSuite {
    test("foo") {
      assert(Hello.addOne(3) == 4)
    }
  }

and then scala-cli Hello.scala would run Hello.main, while scala-cli test Hello.scala would run the test suite defined in HelloTest. Is this feasible or something that we want? I would be open to writing this feature if it's something that would be accepted. If so, I can write up a RFC-like to get some opinions on the design. Thanks!

[Gedochao]

Duplicate of #1093, should be tracked there.
Closing this.

[Gedochao]

@antholeole If you are indeed interested in implementing this, let's track it in #1093.