OpenSource/GildedRose-Refactoring-Kata
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Matt Decker 2022-06-26 09:15:11 -05:00 committed by GitHub
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1
elixir/.gitignore vendored
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_build/

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elixir/config/config.exs
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use Mix.Config

83
elixir/lib/gilded_rose.ex
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defmodule GildedRose do
# Example
# update_quality([%Item{name: "Backstage passes to a TAFKAL80ETC concert", sell_in: 9, quality: 1}])
# => [%Item{name: "Backstage passes to a TAFKAL80ETC concert", sell_in: 8, quality: 3}]
def update_quality(items) do
Enum.map(items, &update_item/1)
end
def update_item(item) do
item = cond do
item.name != "Aged Brie" && item.name != "Backstage passes to a TAFKAL80ETC concert" ->
if item.quality > 0 do
if item.name != "Sulfuras, Hand of Ragnaros" do
%{item | quality: item.quality - 1}
else
item
end
else
item
end
true ->
cond do
item.quality < 50 ->
item = %{item | quality: item.quality + 1}
cond do
item.name == "Backstage passes to a TAFKAL80ETC concert" ->
item = cond do
item.sell_in < 11 ->
cond do
item.quality < 50 ->
%{item | quality: item.quality + 1}
true -> item
end
true -> item
end
cond do
item.sell_in < 6 ->
cond do
item.quality < 50 ->
%{item | quality: item.quality + 1}
true -> item
end
true -> item
end
true -> item
end
true -> item
end
end
item = cond do
item.name != "Sulfuras, Hand of Ragnaros" ->
%{item | sell_in: item.sell_in - 1}
true -> item
end
cond do
item.sell_in < 0 ->
cond do
item.name != "Aged Brie" ->
cond do
item.name != "Backstage passes to a TAFKAL80ETC concert" ->
cond do
item.quality > 0 ->
cond do
item.name != "Sulfuras, Hand of Ragnaros" ->
%{item | quality: item.quality - 1}
true -> item
end
true -> item
end
true -> %{item | quality: item.quality - item.quality}
end
true ->
cond do
item.quality < 50 ->
%{item | quality: item.quality + 1}
true -> item
end
end
true -> item
end
end
end

3
elixir/lib/item.ex
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defmodule Item do
defstruct name: nil, sell_in: nil, quality: nil
end

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elixir/mix.exs
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defmodule GildedRose.Mixfile do
use Mix.Project
def project do
[app: :gilded_rose,
version: "0.0.1",
elixir: "~> 1.0"]
end
end

10
elixir/test/gilded_rose_test.exs
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defmodule GildedRoseTest do
use ExUnit.Case
test "begin the journey of refactoring" do
items = [%Item{name: "foo", sell_in: 0, quality: 0}]
GildedRose.update_quality(items)
%{name: firstItemName} = List.first(items)
assert "fixme" == firstItemName
end
end

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elixir/test/test_helper.exs
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ExUnit.start()