minitest-thing.md

This is my ideal design in Minitest

require 'test_helper'
describe "Thing" do
  let(:cow) { Array.new }

  it "does the thing" do
    _(cow.length).must_be :<, 3

    value do
      cow << :woof
    end.must_change "cow.count"
  end
end

But this blows up in my face saying assert_difference not defined and the following remedies it.

require 'test_helper'
class ThingTest < ActiveSupport::TestCase
  describe "Thing" do
    let(:cow) { Array.new }

    it "does the thing" do
      _(cow.length).must_be :<, 3

      value do
        cow << :woof
      end.must_change "cow.count"
    end
  end
end

This brings in all the right methods into scope for my tests to work. But I find it ugly and weird to just use a describe block inside a class block. Very un-class-like