Port TextTestFixture.

io/tests/correctness/TexttestFixture.io

@@ -0,0 +1,34 @@
+doRelativeFile("../../io/Item.io")
+doRelativeFile("../../io/GildedRose.io")
+
+writeln("OMGHAI!")
+
+items := list(
+    Item with("+5 Dexterity Vest", 10, 20), //
+    Item with("Aged Brie", 2, 0), //
+    Item with("Elixir of the Mongoose", 5, 7), //
+    Item with("Sulfuras, Hand of Ragnaros", 0, 80), //
+    Item with("Sulfuras, Hand of Ragnaros", -1, 80),
+    Item with("Backstage passes to a TAFKAL80ETC concert", 15, 20),
+    Item with("Backstage passes to a TAFKAL80ETC concert", 10, 49),
+    Item with("Backstage passes to a TAFKAL80ETC concert", 5, 49),
+    // this conjured item does not work properly yet
+    Item with("Conjured Mana Cake", 3, 6)
+)
+
+app := GildedRose with(items)
+
+days := 2
+if (System args size > 1,
+    days = System args at(1) asNumber + 1
+)
+
+for(i, 0, days - 1,
+    writeln("-------- day " .. i .. " --------")
+    writeln("name, sellIn, quality")
+    items foreach(item,
+        writeln(item)
+    )
+    writeln
+    app updateQuality
+)