flatten an array of arbitrarily nested arrays of integers into a flat array of integers - test

nice_flatten_test.rb

require 'minitest/autorun'
require_relative 'nice_flatten'

class NiceFlattenTest < Minitest::Test
  def test_flattens_an_array_of_nested_arrays_into_a_flat_array
    flattened_array = [[1, 2, [3]], 4].flatten
    assert_equal [1, 2, 3, 4], flattened_array
  end

  def test_flattens_another_array_of_nested_arrays_into_a_flat_array
    flattened_array = [[1, 2, [3]], 4, [5], [6, 7, [8]]].flatten
    assert_equal [1, 2, 3, 4, 5, 6, 7, 8], flattened_array
  end

  def test_flattens_an_empty_array
    flattened_array = [].flatten
    assert_equal [], flattened_array
  end
end

simple tests using minitest