object IterableExtSpec : Spek({

  val list = (0 until 100).toList()
  describe("splitAt") {

    it("asserts when n < 0") {
      assertFailsWith<IllegalArgumentException> {
        list.splitAt(-2)
      }
    }

    it("returns <empty, original> when n = 0") {
      assertEquals(listOf<Int>() to list, list.splitAt(0))
    }

    it("returns <original, empty> when n = size") {
      assertEquals(list to listOf(), list.splitAt(list.size))
    }

    it("returns <original, empty> when n > size") {
      assertEquals(list to listOf(), list.splitAt(list.size + 10))
    }

    it("otherwise splits the list as desired") {
      assertEquals(list.take(20) to list.takeLast(list.size - 20), list.splitAt(20))
    }
  }

})