testM("pbt"){
          val breakGen: Gen[Random, String] = Gen.elements("'\r\n", "\n", "", "", "")
          val stringWithBreaks: Gen[Random with Sized, String] = Gen.string(Gen.printableChar).zipWith(breakGen)(_ ++ _)
          val g: Gen[Random with Sized, Chunk[String]] = Gen.listOf(stringWithBreaks).map(Chunk.fromIterable(_))
          val gen = Gen.listOf(g).map(Chunk.fromIterable(_))
          checkM(gen) { lines =>
            ZStream.fromChunks(lines).flattenChunks.transduce(ZTransducer.splitLines).runCollect.map(res => {
              println(s"${res.length}  " + res)
              val input = lines.map(_.mkString).mkString
              val expected = Source.fromString(input).getLines().toList
              assert(res)(equalTo(expected))
            })
          }
        }