exercism/elixir/all-your-base/test/all_your_base_test.exs

defmodule AllYourBaseTest do
  use ExUnit.Case

  test "convert single bit one to decimal" do
    assert AllYourBase.convert([1], 2, 10) == {:ok, [1]}
  end

  # @tag :pending
  test "convert binary to single decimal" do
    assert AllYourBase.convert([1, 0, 1], 2, 10) == {:ok, [5]}
  end

  # @tag :pending
  test "convert single decimal to binary" do
    assert AllYourBase.convert([5], 10, 2) == {:ok, [1, 0, 1]}
  end

  # @tag :pending
  test "convert binary to multiple decimal" do
    assert AllYourBase.convert([1, 0, 1, 0, 1, 0], 2, 10) == {:ok, [4, 2]}
  end

  # @tag :pending
  test "convert decimal to binary" do
    assert AllYourBase.convert([4, 2], 10, 2) == {:ok, [1, 0, 1, 0, 1, 0]}
  end

  # @tag :pending
  test "convert trinary to hexadecimal" do
    assert AllYourBase.convert([1, 1, 2, 0], 3, 16) == {:ok, [2, 10]}
  end

  # @tag :pending
  test "convert hexadecimal to trinary" do
    assert AllYourBase.convert([2, 10], 16, 3) == {:ok, [1, 1, 2, 0]}
  end

  # @tag :pending
  test "convert 15-bit integer" do
    assert AllYourBase.convert([3, 46, 60], 97, 73) == {:ok, [6, 10, 45]}
  end

  # @tag :pending
  test "convert empty list" do
    assert AllYourBase.convert([], 2, 10) == {:ok, [0]}
  end

  # @tag :pending
  test "convert single zero" do
    assert AllYourBase.convert([0], 10, 2) == {:ok, [0]}
  end

  # @tag :pending
  test "convert multiple zeros" do
    assert AllYourBase.convert([0, 0, 0], 10, 2) == {:ok, [0]}
  end

  # @tag :pending
  test "convert leading zeros" do
    assert AllYourBase.convert([0, 6, 0], 7, 10) == {:ok, [4, 2]}
  end

  # @tag :pending
  test "convert first base is one" do
    assert AllYourBase.convert([0], 1, 10) == {:error, "input base must be >= 2"}
  end

  # @tag :pending
  test "convert first base is zero" do
    assert AllYourBase.convert([], 0, 10) == {:error, "input base must be >= 2"}
  end

  # @tag :pending
  test "convert first base is negative" do
    assert AllYourBase.convert([1], -2, 10) == {:error, "input base must be >= 2"}
  end

  # @tag :pending
  test "convert negative digit" do
    assert AllYourBase.convert([1, -1, 1, 0, 1, 0], 2, 10) ==
             {:error, "all digits must be >= 0 and < input base"}
  end

  # @tag :pending
  test "convert invalid positive digit" do
    assert AllYourBase.convert([1, 2, 1, 0, 1, 0], 2, 10) ==
             {:error, "all digits must be >= 0 and < input base"}
  end

  # @tag :pending
  test "convert second base is one" do
    assert AllYourBase.convert([1, 0, 1, 0, 1, 0], 2, 1) == {:error, "output base must be >= 2"}
  end

  # @tag :pending
  test "convert second base is zero" do
    assert AllYourBase.convert([7], 10, 0) == {:error, "output base must be >= 2"}
  end

  # @tag :pending
  test "convert second base is negative" do
    assert AllYourBase.convert([1], 2, -7) == {:error, "output base must be >= 2"}
  end

  # @tag :pending
  test "convert both bases are negative" do
    assert AllYourBase.convert([1], -2, -7) == {:error, "input base must be >= 2"}
  end
end