grufino

test "lists of different size as input result in error" do
      stats = [[0, 10, 20], [20, 10, 0], [10, 10]]

      assert MissingData.average_list(stats) == :error
end

grufino

test "generate list of numbers given same size input list" do
      stats = [[0, 10, 20], [20, 10, 0], [10, 10, 10]]
      
      assert MissingData.average_list(stats) == [15, 10, 15]
end

grufino

{"ac_ratio":
    {"accelerations":
    [100.0,166.0,0,119.0,147.0,92.0,0,0,118.0,0,127.0,133.0,
        192.0,0,103.0,133.0,0,142.0,149.0,181.0,0,140.0,0,0,0,0,0,0],
        "sprint_distances":
            [153.002649391,231.992722498,0,272.078987806,167.660927286,198.818410826,0,0,376.611274507,
            0,320.307097832,255.344880942,743.19938242,0,603.015597359,40.2846969563,0,789.82629535,
            130.172380645,807.139266604,0,653.654959634,0,0,0,0,0,0]
    }
}

grufino

property "index number is always it's average in all indexes" do
      check all size <- integer(1..100),
                number_lists <- list_of(number_list(size), min_length: 1, max_length: 100) do
        # since this test is based on index it also tests that ordering is maintained
        Enum.map(1..(size - 1), fn index ->
          index_avg =
            Enum.map(number_lists, fn number_list -> Enum.at(number_list, index) end)
            |> Enum.filter(fn value -> value != 0 && value != nil end)
            |> Math.Enum.mean()

grufino

property "always returns list of the same size" do
   check all size <- integer(0..100),
   number_lists <- list_of(number_list(size), min_length: 1, max_length: 100) do
     assert length(MissingData.average_list(number_lists)) == length(Enum.random(number_lists))
   end
end

grufino

defp number_list(size) do
  gen all number_list <- list_of(integer(0..99999), length: size) do
    number_list
  end
end

grufino

defmodule MissingData do
  @doc """
    Example input:
    > MissingData.average_list([[0, 10, 20], [20, 10, 0], [10, 10, 10]])
    Example output:
    > [15, 10, 15]
  """

  def average_list(list_of_lists) do
    if have_same_sizes?(list_of_lists) do