CoCoCoCoCoCo / docs
← Lua Academy

Typed Lua · 36 / 69

Describe map values

YOUR TASK

Make this happen

3 steps

  1. A map annotation constrains each value while allowing different string keys. Build a map of numeric stock levels.

  2. Read the cases in lesson.test.lua, then choose Check solution to see what needs to change.

  3. Update subject.lua until every test passes. Keep the supplied tests unchanged.

Start with Check solution, then use the failures to guide your edits.

Read the starter and tests

subject.lua

exports.stock = function(): { [string]: number }
  return { paper = "12", ink = 3 }
end

lesson.test.lua

local t = require("test")
local subject = require("cococo.subject")
t.it("numeric stock", function()
  local s = subject.load()
  t.expect(s.stock().paper):eq(12)
end)