scala specs2 error: anon is not equal scala.collection.immutable

Question

I'm running the following test

Idea.findById(1).get.tags must equalTo(List[String]("internet, tecnología"))

and I'm getting the following error

[info] Idea.tags should
[error] x should retrieve a list of tag names for the idea
[error]    'internet, tecnología': anon is not equal to 'internet, tecnología': scala.collection.immutable.:: (IdeaTagSpec.scala:42)

this is the method I'm trying to test

lazy val tags: List[String] = {
  Tag.findByIdea(this).map(_.name).toList
}

I could solve it with this ugly hack

( Idea.findById(1).get.tags.toString 
    must equalTo(List[String]("internet, tecnología").toString)
)

But I'm sure there's a better way to do it...

-- EDIT --

sorry, it was a silly mistake on my part (It should habe been List("internet", "tecnologia") instead)

anyway the error message was quite misleading, that's why I'm leaving this question here...

Which specs2 version are you using? Can you please try with the latest one, 1.12.2? And if this doesn't work, post a fully executable example? Thanks. — Eric
I'm using the version 1.9 that comes bundled with play framework 2, 'll try to upgrade to 1.12.2 — opensas

Eric Eric · Accepted Answer · 2012-10-17T12:25:52

The situation will be improved with the next specs2 version. If you try out specs2-1.12.3-SNAPSHOT, you will get:

List("1, 2, 3") must_== List("1", "2", "3")

'List('1, 2, 3'): scala.collection.immutable.$colon$colon[java.lang.String]' 
  is not equal to 
'List('1', '2', '3'): scala.collection.immutable.$colon$colon[java.lang.String]'

The difference of quotes around each element should help, and if the types of the elements are different you'll get:

List(1, 2, 3) must_== List("1", "2", "3")

'List('1', '2', '3'): scala.collection.immutable.$colon$colon[java.lang.Integer]' 
  is not equal to 
'List('1', '2', '3'): scala.collection.immutable.$colon$colon[java.lang.String]'

And finally, for a "normal" case:

List(1, 2, 3) must_== List(3, 2, 1)

List(1, 2, 3) is not equal to List(3, 2, 1)

scala specs2 error: anon is not equal scala.collection.immutable

1 Answers