port GildedRose Java/Ruby to R language, add a RUnit test stub

R/gilded_rose.R

@@ -0,0 +1,56 @@
+source('item.R')
+
+update_quality <- function(items) {
+  lapply(items, 
+    function(item) {
+      
+      if (item$name != "Aged Brie" && item$name != "Backstage passes to a TAFKAL80ETC concert") {
+        if (item$quality > 0) {
+          if (item$name != "Sulfuras, Hand of Ragnaros") {
+            item$quality <- item$quality - 1
+          }
+        }
+      } else {
+        if (item$quality < 50) {
+          item$quality <- item$quality + 1
+          if (item$name == "Backstage passes to a TAFKAL80ETC concert") {
+            if (item$sell_in < 11) {
+              if (item$quality < 50) {
+                item$quality = item$quality + 1
+              }
+            }
+            if (item$sell_in < 6) {
+              if (item$quality < 50) {
+                item$quality = item$quality + 1
+              }
+            }
+          }
+        }
+      }
+      
+      if (item$name != "Sulfuras, Hand of Ragnaros") {
+        item$sell_in <- item$sell_in - 1
+      }
+      
+      if (item$sell_in < 0) {
+        if (item$name != "Aged Brie") {
+          if (item$name != "Backstage passes to a TAFKAL80ETC concert") {
+            if (item$quality > 0) {
+              if (item$name != "Sulfuras, Hand of Ragnaros") {
+                item$quality <- item$quality - 1
+              }
+            }
+          } else {
+            item$quality <- item$quality - item$quality
+          }
+        } else {
+          if (item$quality < 50) {
+            item$quality <- item$quality + 1
+          }
+        }
+      }
+      
+      item
+    } 
+  ) 
+}

R/item.R

@@ -0,0 +1,13 @@
+item <- function(name, sell_in, quality) {
+  newItem <- list(name=name, sell_in=sell_in, quality=quality)
+  class(newItem) <- 'item'
+  newItem
+}
+
+as.character.item <- function(item) {
+  paste(item$name, ", ", item$sell_in, ", ", item$quality, sep='')
+}
+
+print.item <- function(item) {
+  print.default(as.character(item))
+}

R/runit_gilded_rose.R

@@ -0,0 +1,7 @@
+source('gilded_rose.R')
+
+test.foo <- function() {
+  items <- list( item('foo', 0, 0) )
+  items <- update_quality(items)
+  checkEquals('fixme', items[[1]]$name);
+}

R/test_setup.R

@@ -0,0 +1,7 @@
+# A little helper script to get the testing infrastructure started
+
+# install.packages("RUnit")
+require(RUnit)
+
+# execute single test file
+runTestFile("runit_gilded_rose.R")

R/texttest_fixture.R

@@ -0,0 +1,33 @@
+rm(list=ls())
+
+source('gilded_rose.R')
+
+writeLines('OMGHAI!')
+
+items <- list(
+  item('+5 Dexterity Vest', 10, 20),
+  item('Aged Brie', 2, 0),
+  item('Elixir of the Mongoose', 5, 7),
+  item('Sulfuras, Hand of Ragnaros', 0, 80),
+  item('Sulfuras, Hand of Ragnaros', -1, 80),
+  item('Backstage passes to a TAFKAL80ETC concert', 15, 20),
+  item('Backstage passes to a TAFKAL80ETC concert', 10, 49),
+  item('Backstage passes to a TAFKAL80ETC concert', 5, 49),
+  # This Conjured item does not work properly yet
+  item('Conjured Mana Cake', 3, 6)
+)
+
+days <- 2
+for (day in 0:days) {
+  writeLines(paste('-------- day ', day, ' --------', sep=''))
+  writeLines('name, sellIn, quality')
+  lapply(items, 
+    function(item) {
+      writeLines(as.character(item))
+    }
+  )
+  writeLines('')
+  items <- update_quality(items)
+}
+
+rm('day', 'days', 'items')