Packages

minmaxlist

0.0.6
0.0.7 0.0.6 0.0.5 0.0.4 0.0.3 0.0.2 0.0.1

Elixir library extending `Enum.min_by/2`, `Enum.max_by/2` and `Enum.min_max_by/2` to return a list of results instead of just one.

HexDocs

Current section

Files

Jump to
Readme
7 Versions
0 Dependencies
Dependants
Files
Activity
minmaxlist test minmaxlist_test.exs
Raw

test/minmaxlist_test.exs 

defmodule MinmaxlistTest do

  use ExUnit.Case

  doctest Minmaxlist





  test "min list by" do

    assert Minmaxlist.min_list_by(["a", "b", "aa", "bb", "bbb", "aaa"], fn(x) -> String.length(x) end) == ["a", "b"]

    assert Minmaxlist.min_list_by([], fn(x) -> String.length(x) end) == []

  end



  test "max list by" do

    assert Minmaxlist.max_list_by(["a", "b", "aa", "bb", "bbb", "aaa"], fn(x) -> String.length(x) end) == ["bbb", "aaa"]

    assert Minmaxlist.max_list_by([], fn(x) -> String.length(x) end) == []

  end



  test "min max list by" do

    assert Minmaxlist.min_max_list_by(["a", "b", "aa", "bb", "bbb", "aaa"], fn(x) -> String.length(x) end) == {["a", "b"], ["bbb", "aaa"]}

    assert Minmaxlist.min_max_list_by([], fn(x) -> String.length(x) end) == {[], []}

  end



  test "README examples" do

    import Minmaxlist

    dataset = [

      %{name: "A", age: 24, income: 4000},

      %{name: "B", age: 22, income: 3300},

      %{name: "C", age: 22, income: 2800},

      %{name: "D", age: 25, income: 5000},

      %{name: "E", age: 22, income: 3300},

      %{name: "F", age: 25, income: 5500},

      %{name: "G", age: 24, income: 4500},

    ]



    result = dataset |> min_list_by(&(&1.age)) |> max_list_by(&(&1.income))

    assert result == [%{name: "B", age: 22, income: 3300}, %{name: "E", age: 22, income: 3300}]



    result = dataset |> min_max_list_by(&(&1.age))

    assert result == {

      [%{name: "B", age: 22, income: 3300}, %{name: "C", age: 22, income: 2800}, %{name: "E", age: 22, income: 3300}],

      [%{name: "D", age: 25, income: 5000}, %{name: "F", age: 25, income: 5500}]

    }

  end

end