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Thinking in Lua · 10 / 69

Combine conditions

YOUR TASK

Make this happen

3 steps

  1. Use and when both conditions must hold. An order may proceed only when it is paid and not cancelled. Lua’s logical operators short-circuit.

  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.ready = function(paid: boolean, cancelled: boolean): boolean
  return paid
end

lesson.test.lua

local t = require("test")
local subject = require("cococo.subject")

t.it("paid and active", function()
  local s = subject.load()
  t.expect(s.ready(true, false)):eq(true)
end)

t.it("cancelled wins", function()
  local s = subject.load()
  t.expect(s.ready(true, true)):eq(false)
end)

t.it("payment required", function()
  local s = subject.load()
  t.expect(s.ready(false, false)):eq(false)
end)