crystal types

a.cr

result = repo.user.findByEmail(user.value["email"])
      p typeof(result.value)                                   #(Iterator::Stop | RethinkDB::QueryResult | String)
      p result.value.is_a?(RethinkDB::QueryResult)             #true
      result.should be_a(DB::Success(RethinkDB::QueryResult))  # fails with error below

Failures:

  1) Repository Repository::User should find a user by email
     Failure/Error: result.should be_a(DB::Success(RethinkDB::QueryResult))

       Expected DB::Success(Iterator::Stop | RethinkDB::QueryResult)(@value={"activeChannel" => {}, "channels" => [], "email" => "test3@test.com", "groups" => [], "id" => "4667082c-f378-4e02-86bf-b985dbf68584", "name" => "test3", "password" => "password3"}) (DB::Success(Iterator::Stop | RethinkDB::QueryResult)) to be a DB::Success(RethinkDB::QueryResult)

     # spec/repository_spec.cr:47