category_tree.rb

# frozen_string_literal: true

class CategoryTree < Struct.new(:json)
  def inspect
  end
end

category_tree_test.rb

# frozen_string_literal: true

require 'minitest/autorun'
require_relative 'category_tree'

class TreePrinterTest < Minitest::Test
  def setup
    @category_tree =
      CategoryTree.new(
        'Garlic' => ['Chesnok Red', 'Ozark'],
        'Tomatoes' => {
          'Beefsteak' =>
            ['Galahad', 'Grand Marshall', 'Brandywine'],
          'Cherry' =>
            ['Sun Gold', 'Supersweet 100']
        }
      )
  end

  def test_inspect_prints_category_tree
    expected = <<~TREE
      Garlic
      -- Chesnok Red
      -- Ozark
      Tomatoes
      -- Beefsteak
      -- -- Galahad
      -- -- Grand Marshall
      -- -- Brandywine
      -- Cherry
      -- -- Sun Gold
      -- -- Supersweet 100
    TREE

    assert_equal(expected.strip, @category_tree.inspect)
  end
end