local iter = require "util.iterators"; describe("util.iterators", function () describe("join", function () it("should produce a joined iterator", function () local expect = { "a", "b", "c", 1, 2, 3 }; local output = {}; for x in iter.join(iter.values({"a", "b", "c"})):append(iter.values({1, 2, 3})) do table.insert(output, x); end assert.same(output, expect); end); end); end);