add gs

RCCService2020/ExtraContent/LuaPackages/AppTempCommon/Common/Signal.spec.lua

@@ -0,0 +1,114 @@
+return function()
+	local Signal = require(script.Parent.Signal)
+
+	it("should construct from nothing", function()
+		local signal = Signal.new()
+
+		expect(signal).to.be.ok()
+	end)
+
+	it("should fire connected callbacks", function()
+		local callCount = 0
+		local value1 = "Hello World"
+		local value2 = 7
+
+		local callback = function(arg1, arg2)
+			expect(arg1).to.equal(value1)
+			expect(arg2).to.equal(value2)
+			callCount = callCount + 1
+		end
+
+		local signal = Signal.new()
+
+		local connection = signal:connect(callback)
+		signal:fire(value1, value2)
+
+		expect(callCount).to.equal(1)
+
+		connection:disconnect()
+		signal:fire(value1, value2)
+
+		expect(callCount).to.equal(1)
+	end)
+
+	it("should disconnect handlers", function()
+		local callback = function()
+			error("Callback was called after disconnect!")
+		end
+
+		local signal = Signal.new()
+
+		local connection = signal:connect(callback)
+		connection:disconnect()
+
+		signal:fire()
+	end)
+
+	it("should fire handlers in order", function()
+		local signal = Signal.new()
+		local x = 0
+		local y = 0
+
+		local callback1 = function()
+			expect(x).to.equal(0)
+			expect(y).to.equal(0)
+			x = x + 1
+		end
+
+		local callback2 = function()
+			expect(x).to.equal(1)
+			expect(y).to.equal(0)
+			y = y + 1
+		end
+
+		signal:connect(callback1)
+		signal:connect(callback2)
+		signal:fire()
+
+		expect(x).to.equal(1)
+		expect(y).to.equal(1)
+	end)
+
+	it("should continue firing despite mid-event disconnection", function()
+		local signal = Signal.new()
+		local countA = 0
+		local countB = 0
+
+		local connectionA
+		connectionA = signal:connect(function()
+			connectionA:disconnect()
+			countA = countA + 1
+		end)
+
+		signal:connect(function()
+			countB = countB + 1
+		end)
+
+		signal:fire()
+
+		expect(countA).to.equal(1)
+		expect(countB).to.equal(1)
+	end)
+
+	it("should skip listeners that were disconnected during event evaluation", function()
+		local signal = Signal.new()
+		local countA = 0
+		local countB = 0
+
+		local connectionB
+
+		signal:connect(function()
+			countA = countA + 1
+			connectionB:disconnect()
+		end)
+
+		connectionB = signal:connect(function()
+			countB = countB + 1
+		end)
+
+		signal:fire()
+
+		expect(countA).to.equal(1)
+		expect(countB).to.equal(0)
+	end)
+end