diff --git a/tests/unit/functions/weatherforecast_spec.js b/tests/unit/functions/weatherforecast_spec.js
new file mode 100644
index 00000000..57c386dd
--- /dev/null
+++ b/tests/unit/functions/weatherforecast_spec.js
@@ -0,0 +1,74 @@
+var fs = require("fs");
+var path = require("path");
+var chai = require("chai");
+var expect = chai.expect;
+var vm = require("vm");
+
+
+describe("Functions module weatherforecast", function() {
+
+	before(function(){
+		Module = {};
+		config = {};
+		Module.definitions = {};
+		Module.register = function (name, moduleDefinition) {
+			Module.definitions[name] = moduleDefinition;
+		};
+		require("../../../modules/default/weatherforecast/weatherforecast.js");
+		Module.definitions.weatherforecast.config = {};
+	});
+
+	describe("roundValue", function() {
+
+		describe("this.config.roundTemp is true", function() {
+			before(function(){
+				Module.definitions.weatherforecast.config.roundTemp = true;
+			});
+
+			var values = [
+				// index 0 value
+				// index 1 expect
+				[1      ,  "1"],
+				[1.0    ,  "1"],
+				[1.02   ,  "1"],
+				[10.12  , "10"],
+				[2.0    ,  "2"],
+				["2.12" ,  "2"],
+				[10.1   , "10"]
+			]
+
+			values.forEach(value => {
+				it(`for ${value[0]} should be return ${value[1]}`, function() {
+					expect(Module.definitions.weatherforecast.roundValue(value[0])).to.equal(value[1]);
+				});
+			});
+		});
+
+
+		describe("this.config.roundTemp is false", function() {
+
+			before(function(){
+				Module.definitions.weatherforecast.config.roundTemp = false;
+			});
+
+			var values = [
+				// index 0 value
+				// index 1 expect
+				[1      ,  "1.0"],
+				[1.0    ,  "1.0"],
+				[1.02   ,  "1.0"],
+				[10.12  , "10.1"],
+				[2.0    ,  "2.0"],
+				["2.12" ,  "2.1"],
+				[10.1   , "10.1"],
+				[10.10  , "10.1"]
+			]
+
+			values.forEach(value => {
+				it(`for ${value[0]} should be return ${value[1]}`, function() {
+					expect(Module.definitions.weatherforecast.roundValue(value[0])).to.equal(value[1]);
+				});
+			});
+		});
+	});
+});