def deps do
  [
    {:watermelon, "~> 0.1.0", only: [:test]}
  ]
end

defmodule MyTest do
  use ExUnit.Case
  use Watermelon.Case

  feature_file("coffee.feature")

  defgiven match(number) when "there are {int} coffee(s) left in the machine" do
    {:ok, %{machine: Machine.put_coffee(Machine.new(), number)}}
  end

  defgiven match(number) when "I have deposited £{int}", context: %{machine: machine} do
    {:ok, %{machine: Machine.deposit(machine, nil, number)}}
  end

  defwhen match when "I press the coffee button", context: %{machine: machine} do
    assert {:ok, machine} = Machine.press_coffee(machine)
    {:ok, machine: machine}
  end

  defwhen match(n) when "I press the coffee button {int} times", context: %{machine: machine} do
    machine =
      for _ <- 1..n, reduce: machine do
        machine ->
          assert {:ok, machine} = Machine.press_coffee(machine)

          machine
      end

    {:ok, machine: machine}
  end

  defthen match when "I should be served a coffee", context: state do
    assert {:coffee, _} = Machine.take_drink(state.machine)

    :ok
  end

  defthen match(num) when "I should have {int} coffee(s)", context: %{machine: machine} do
    assert machine.coffees == num

    :ok
  end
end