add gs

RCCService2018/content/LuaPackages/RoactImpl/ReconcilerCompat.spec.lua

@@ -0,0 +1,61 @@
+return function()
+	local ReconcilerCompat = require(script.Parent.ReconcilerCompat)
+	local Reconciler = require(script.Parent.Reconciler)
+	local createElement = require(script.Parent.createElement)
+
+	it("reify should only warn once per call site", function()
+		local callCount = 0
+		local lastMessage
+		ReconcilerCompat._warn = function(message)
+			callCount = callCount + 1
+			lastMessage = message
+		end
+
+		-- We're using a loop so that we get the same stack trace and only one
+		-- warning hopefully.
+		for _ = 1, 2 do
+			local handle = ReconcilerCompat.reify(createElement("StringValue"))
+			Reconciler.unmount(handle)
+		end
+
+		expect(callCount).to.equal(1)
+		expect(lastMessage:find("ReconcilerCompat.spec")).to.be.ok()
+
+		-- This is a different call site, which should trigger another warning.
+		local handle = ReconcilerCompat.reify(createElement("StringValue"))
+		Reconciler.unmount(handle)
+
+		expect(callCount).to.equal(2)
+		expect(lastMessage:find("ReconcilerCompat.spec")).to.be.ok()
+
+		ReconcilerCompat._warn = warn
+	end)
+
+	it("teardown should only warn once per call site", function()
+		local callCount = 0
+		local lastMessage
+		ReconcilerCompat._warn = function(message)
+			callCount = callCount + 1
+			lastMessage = message
+		end
+
+		-- We're using a loop so that we get the same stack trace and only one
+		-- warning hopefully.
+		for _ = 1, 2 do
+			local handle = Reconciler.mount(createElement("StringValue"))
+			ReconcilerCompat.teardown(handle)
+		end
+
+		expect(callCount).to.equal(1)
+		expect(lastMessage:find("ReconcilerCompat.spec")).to.be.ok()
+
+		-- This is a different call site, which should trigger another warning.
+		local handle = Reconciler.mount(createElement("StringValue"))
+		ReconcilerCompat.teardown(handle)
+
+		expect(callCount).to.equal(2)
+		expect(lastMessage:find("ReconcilerCompat.spec")).to.be.ok()
+
+		ReconcilerCompat._warn = warn
+	end)
+end