add Lua lang

lua/.gitignore

@@ -0,0 +1,4 @@
+/luarocks
+/lua
+/lua_modules
+/.luarocks

lua/README.md

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+# Gilded Rose starting position in Lua
+
+I assume you have installed [Lua](https://lua.org/start.html) on your system (version >= 5.1).
+
+## Install
+
+If you want to use [LuaRocks](https://luarocks.org/) there is a config file that should install the dependencies nicely:
+
+```sh
+$ luarocks install --only-deps gildedrose-dev-1.rockspec
+```
+
+## Run unit tests from the command line
+
+The tests use the [Busted](https://github.com/lunarmodules/busted) tool.
+
+```sh
+$ busted
+```
+
+For coverage you'll need to install [LuaCov](https://github.com/lunarmodules/luacov)
+
+```sh
+$ busted --coverage
+$ luacov # generate the report
+```
+
+## Run the TextTest fixture on the command line
+
+```sh
+$ lua src/main.lua 10
+```
+
+## Run the TextTest approval test that comes with this project
+
+There are instructions in the [TextTest Readme](../texttests/README.md) for setting up TextTest.
+You will need to specify the executable in [config.gr](../texttests/config.gr).
+Uncomment this line to use it:
+
+```
+executable:${TEXTTEST_HOME}/lua/texttest
+```
+
+The TextTest fixture use the `./texttest` executable as a hack to make the `require` work.
+Lua does not have relative `require` and I did not find a simple way to implement them so the test need to run from the `./lua` directory.
+I will improve this in the future if I learn how to do it better :)

lua/gildedrose-dev-1.rockspec

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+rockspec_format = "3.0"
+package = "gildedrose"
+version = "dev-1"
+source = {
+   url = "https://github.com/emilybache/GildedRose-Refactoring-Kata.git"
+}
+description = {
+   license = "MIT"
+}
+dependencies = {
+   "lua >= 5.1, < 5.5"
+}
+test_dependencies = {
+   "busted >= 2.2"
+}
+test = {
+   type = "command",
+   command = "busted"
+}

lua/spec/gilded_rose_spec.lua

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+local Item = require("src/item")
+local GildedRose = require("src/gilded_rose")
+
+describe("Gilded Rose", function()
+  it("should foo", function()
+    local gilded_rose = GildedRose:new({ Item:new("foo", 0, 0) })
+    local items = gilded_rose:updateQuality()
+    assert.same("fixme", items[1].name)
+  end)
+end)

lua/src/gilded_rose.lua

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+local GildedRose = {}
+
+function GildedRose:new(items)
+  return {
+    items = items,
+    updateQuality = self.updateQuality,
+  }
+end
+
+function GildedRose:updateQuality()
+  for i, _ in pairs(self.items) do
+    if self.items[i].name ~= "Aged Brie" and
+        self.items[i].name ~= "Backstage passes to a TAFKAL80ETC concert" then
+      if self.items[i].quality > 0 then
+        if self.items[i].name ~= "Sulfuras, Hand of Ragnaros" then
+          self.items[i].quality = self.items[i].quality - 1
+        end
+      end
+    else
+      if self.items[i].quality < 50 then
+        self.items[i].quality = self.items[i].quality + 1
+
+        if self.items[i].name == "Backstage passes to a TAFKAL80ETC concert" then
+          if self.items[i].sell_in < 11 then
+            if self.items[i].quality < 50 then
+              self.items[i].quality = self.items[i].quality + 1
+            end
+          end
+          if self.items[i].sell_in < 6 then
+            if self.items[i].quality < 50 then
+              self.items[i].quality = self.items[i].quality + 1
+            end
+          end
+        end
+      end
+    end
+
+    if self.items[i].name ~= "Sulfuras, Hand of Ragnaros" then
+      self.items[i].sell_in = self.items[i].sell_in - 1
+    end
+
+    if self.items[i].sell_in < 0 then
+      if self.items[i].name ~= "Aged Brie" then
+        if self.items[i].name ~= "Backstage passes to a TAFKAL80ETC concert" then
+          if self.items[i].quality > 0 then
+            if self.items[i].name ~= "Sulfuras, Hand of Ragnaros" then
+              self.items[i].quality = self.items[i].quality - 1
+            end
+          end
+        else
+          self.items[i].quality = self.items[i].quality - self.items[i].quality
+        end
+      else
+        if self.items[i].quality < 50 then
+          self.items[i].quality = self.items[i].quality + 1
+        end
+      end
+    end
+  end
+  return self.items
+end
+
+return GildedRose

lua/src/item.lua

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+local Item = {}
+
+function Item:new(name, sell_in, quality)
+  return { name = name, sell_in = sell_in, quality = quality }
+end
+
+return Item

lua/src/main.lua

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+local Item = require("src/item")
+local GildedRose = require("src/gilded_rose")
+
+local items = {
+  Item:new("+5 Dexterity Vest", 10, 20),
+  Item:new("Aged Brie", 2, 0),
+  Item:new("Elixir of the Mongoose", 5, 7),
+  Item:new("Sulfuras, Hand of Ragnaros", 0, 80),
+  Item:new("Sulfuras, Hand of Ragnaros", -1, 80),
+  Item:new("Backstage passes to a TAFKAL80ETC concert", 15, 20),
+  Item:new("Backstage passes to a TAFKAL80ETC concert", 10, 49),
+  Item:new("Backstage passes to a TAFKAL80ETC concert", 5, 49),
+
+  -- This Conjured item does not work properly yet
+  Item:new("Conjured Mana Cake", 3, 6),
+};
+
+local days = arg[1] or 2;
+local gilded_rose = GildedRose:new(items);
+
+print("OMGHAI!");
+for day = 0, days do
+  print("-------- day " .. day .. " --------");
+  print("name, sellIn, quality");
+  for _, item in pairs(items) do
+    print(item.name .. ", " .. item.sell_in .. ", " .. item.quality);
+  end
+  gilded_rose:updateQuality();
+  print("")
+end

lua/texttest

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+#!/usr/bin/env bash
+
+cd ${TEXTTEST_HOME}/lua
+exec ./lua src/main.lua "$@"

texttests/config.gr

@@ -17,6 +17,9 @@ diff_program:meld
 # Settings for the zig version
 #executable:${TEXTTEST_HOME}/zig/zig-out/bin/zig
 
+# Settings for the lua version
+#executable:${TEXTTEST_HOME}/lua/texttest
+
 # Settings for the Java version using Gradle wrapped in a python script
 #executable:${TEXTTEST_HOME}/Java/texttest_rig.py
 #interpreter:python