return function()local W=game:GetService("\082\101\112\108\105\099\097\116\101\100\083\116\111\114\097\103\101")local Y=W.Packages local R=require(Y.Llama)local I=R.Set local G=I.union it("\115\104\111\117\108\100 \118\097\108\105\100\097\116\101 \116\121\112\101\115",function()local W,Y=pcall(function()G(0)end);(expect(string.find(Y,"\101\120\112\101\099\116\101\100\044 \103\111\116"))).to.be.ok()end)it("\115\104\111\117\108\100 \114\101\116\117\114\110 \097 \110\101\119 \116\097\098\108\101",function()local W={};(expect(G(W))).never.to.equal(W)end)it("\115\104\111\117\108\100 \110\111\116 \109\117\116\097\116\101 \112\097\115\115\101\100 \105\110 \116\097\098\108\101\115\040\115\041",function()local W={foo=true,bar=true;baz=true}local Y={foobar=true,barbaz=true,bazfoo=true}local R=0 local I=0 setmetatable(W,{__newindex=function()R=R+1 end})setmetatable(Y,{__newindex=function()I=I+1 end})G(W,Y);(expect(R)).to.equal(0);(expect(I)).to.equal(0)end)it("\115\104\111\117\108\100 \114\101\116\117\114\110 \116\104\101 \117\110\105\111\110 \098\101\116\119\101\101\110 \112\114\111\118\105\100\101\100 \115\101\116\115",function()local W={foo=true}local Y={bar=true}local R={baz=true}local I=G(W,Y,R);(expect(I.foo)).to.equal(true);(expect(I.bar)).to.equal(true);(expect(I.baz)).to.equal(true)end)end
return function()
	local ReplicatedStorage = game:GetService("ReplicatedStorage")

	local Packages = ReplicatedStorage.Packages
	local Llama = require(Packages.Llama)

	local Set = Llama.Set
	local union = Set.union

	it("should validate types", function()
		local _, err = pcall(function()
			union(0)
		end)

		expect(string.find(err, "expected, got")).to.be.ok()
	end)

	it("should return a new table", function()
		local a = {}

		expect(union(a)).never.to.equal(a)
	end)
	
	it("should not mutate passed in tables(s)", function()
		local a = {
			foo = true,
			bar = true,
			baz = true,
		}
		local b = {
			foobar = true,
			barbaz = true,
			bazfoo = true,
		}
		local mutationsA = 0
		local mutationsB = 0

		setmetatable(a, {
			__newindex = function()
				mutationsA = mutationsA + 1
			end
		})

		setmetatable(b, {
			__newindex = function()
				mutationsB = mutationsB + 1
			end
		})

		union(a, b)

		expect(mutationsA).to.equal(0)
		expect(mutationsB).to.equal(0)
	end)

	it("should return the union between provided sets", function()
		local a = {
			foo = true,
		}
		local b = {
			bar = true,
		}
		local c = {
			baz = true,
		}

		local together = union(a, b, c)
		
		expect(together.foo).to.equal(true)
		expect(together.bar).to.equal(true)
		expect(together.baz).to.equal(true)
	end)
end