add math.clamp (#188)

lib/createEnvironment.lua

@@ -1,5 +1,6 @@
 local createSettings = import("./createSettings")
 local functions = import("./functions")
+local libs = import("./libs")
 local taskFunctions = import("./taskFunctions")
 local types = import("./types")
 local Enum = import("./Enum")
@@ -15,6 +16,10 @@ for key, value in pairs(types) do
 	baseEnvironment[key] = value
 end
 
+for key, lib in pairs(libs) do
+	baseEnvironment[key] = lib
+end
+
 baseEnvironment.Instance = Instance
 baseEnvironment.Enum = Enum
 baseEnvironment.__LEMUR__ = true

lib/libs/init.lua

@@ -0,0 +1,11 @@
+local names = {
+	"math",
+}
+
+local libs = {}
+
+for _, name in ipairs(names) do
+	libs[name] = import("./" .. name)
+end
+
+return libs

lib/libs/math.lua

@@ -0,0 +1,11 @@
+local rbxMath = {}
+
+for key, value in pairs(math) do
+	rbxMath[key] = value
+end
+
+rbxMath.clamp = function(n, min, max)
+	return math.min(max, math.max(min, n))
+end
+
+return rbxMath

lib/libs/math_spec.lua

@@ -0,0 +1,21 @@
+local math = import("./math")
+
+describe("libs.math", function()
+	describe("clamp", function()
+		it("should be a function", function()
+			assert.is_function(math.clamp)
+		end)
+
+		it("should clamp if > max", function()
+			assert.are.equals(1, math.clamp(2, 0, 1))
+		end)
+
+		it("should clamp if < min", function()
+			assert.are.equals(0, math.clamp(-1, 0, 1))
+		end)
+
+		it("should not clamp if value is between min and max", function()
+			assert.are.equals(0.5, math.clamp(0.5, 0, 1))
+		end)
+	end)
+end)