     coins = [1, 5, 10, 25, 100]
     expected = [5, 10]
     assert Change.generate(coins, 15) == {:ok, expected}
-  end
-
-  @tag :pending
-  test "possible change without unit coins available" do
-    coins = [2, 5, 10, 20, 50]
-    expected = [2, 2, 2, 5, 10]
-    assert Change.generate(coins, 21) == {:ok, expected}
   end
 
   @tag :pending

  end

  @tag :pending
  test "error if no combination can add up to target" do
    coins = [5, 10]
    assert Change.generate(coins, 94) == {:error, "cannot change"}
  end
end

  use ExUnit.Case

  # @tag :pending
  test "single coin change" do
    coins = [1, 5, 10, 25, 100]
    expected = [25]
