     assert String.normalize("𑖹̴𑖯", :nfc) == "𑖹̴𑖯"
   end
 
-  test "graphemes" do
+  test "graphemes/1" do
     # Extended
     assert String.graphemes("Ā̀stute") == ["Ā̀", "s", "t", "u", "t", "e"]
     # CLRF

    end
  end

  test "pad_trailing" do
    assert String.pad_trailing("", 5) == "     "
    assert String.pad_trailing("abc", 5) == "abc  "
    assert String.pad_trailing("  abc  ", 9) == "  abc    "

    end
  end

  test "slice/2,3" do
    assert String.slice("elixir", 1, 3) == "lix"
    assert String.slice("あいうえお", 2, 2) == "うえ"
    assert String.slice("ειξήριολ", 2, 3) == "ξήρ"
