greater than / smaller than does not compile with Long type about scalatest HOT 7 OPEN

Hmm, I'm actually not sure this is a bug as this works.

0l should be >= (0l)

However, it would be nice if the right hand side could be implicitly converted to long.

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I struggled with this for ... 30? minutes, until I noticed the compilation & IDE errors were because of wrong types — because of this GitHub issue I think. Now, this works fine:

someVariableOfTypeLong must be > 0L

That is, specifying 0L (type Long) instead of just 0 (type Int) solved the problem for me.

A friendlier compilation error or IntelliJ highlighting error, would have been helpful. Currently IntelliJ Idea just says "cannot resolve function with such signature" when I hover the error-underlined word "must" in the source code (in the 0 version, i.e. RHS=Integer not Long). And the Scala compiler itself says "overloaded method value must with alternatives:" and then prints a large blob of text: about 10 different functions and their signatures. Neither Idea nor the Scala compiler is helpful in troubleshooting the problem here (not to me at least). — Perhaps this is hard for the ScalaTest devs to do anything about though.

Anyway thanks for building ScalaTest, it's my favorite Scala + Java test framework.

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Long is taking too Long I guess! Any update on this? If you want to test any time-based tool which uses Long then you would have this problem. I was assuming at least the primitive types are fully supported by now.

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I've thought about doing that, but haven't yet. What you need to do is make them both long, as you discovered. I'll continue to think about it.

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This one I still would like to make more open to cooperating numeric types, but it will need to wait until we have the cooperating numerics in Scalactic, which will be 3.0.

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Not compiling here is better, IMO, than the behavior of mustBe which will compile but produce unexpected results when the static types being compared are not identical:

import MustMatchers._
import scala.concurrent.duration._

class Test extends WordSpec {
  "Duration/FiniteDuration mixed" when {
    "tested with must" should {
      "work" in {
        60.seconds.asInstanceOf[Duration] must be >= (60.seconds) // Fails to compile
      }
    }
    "tested with mustBe" should {
      "work" in {
        60.seconds.asInstanceOf[Duration] mustBe >= (60.seconds) // Fails with "60 seconds was not equal to >= (60 seconds)"
      }
    }
  }
}

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I wish this would get fixed :(

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