add deepExtend & tests

Author: icebob

lib/helpers/deep-extend.js

@@ -0,0 +1,16 @@
+"use strict";
+
+function deepExtend(destination, source) {
+	for (let property in source) {
+		if (typeof source[property] === "object" &&
+			source[property] !== null) {
+			destination[property] = destination[property] || {};
+			deepExtend(destination[property], source[property]);
+		} else {
+			destination[property] = source[property];
+		}
+	}
+	return destination;
+}
+
+module.exports = deepExtend;

lib/validator.js

@@ -1,6 +1,7 @@
 "use strict";
 
 const flatten = require("./helpers/flatten");
+const deepExtend = require("./helpers/deep-extend");
 const defaultMessages = require("./messages");
 
 function loadRules() {
@@ -26,14 +27,14 @@ function loadRules() {
  * @param {Object} opts 
  */
 function Validator(opts = {}) {
-	this.opts = Object.assign(opts, {
+	this.opts = deepExtend({
 		messages: defaultMessages
-	});
+	}, opts);
 
 	this.messages = this.opts.messages;
 
 	// Load rules
-	this.rules = loadRules()
+	this.rules = loadRules();
 }
 
 /**

test/helpers/deep-extend.spec.js

@@ -0,0 +1,35 @@
+
+const deepExtend = require("../../lib/helpers/deep-extend");
+
+describe("deepExtend", () => {
+	it("should return a merged object", () => {
+		const result = deepExtend({
+			a: {
+				b: 5,
+				c: 6
+			},
+			d: true
+		}, {
+			a: {
+				b: 10,
+				e: "Hello"
+			},
+			f: "F",
+			g: {
+				h: "H"
+			}
+		});
+		expect(result).toEqual({
+			a: {
+				b: 10,
+				c: 6,
+				e: "Hello"
+			},
+			d: true,
+			f: "F",
+			g: {
+				h: "H"
+			}
+		});
+	});
+});

test/helpers/flatten.spec.js

@@ -1,8 +1,8 @@
 
-const flatten = require('../../lib/helpers/flatten');
+const flatten = require("../../lib/helpers/flatten");
 
-describe('flatten', () => {
-	it('should return a flat array', () => {
+describe("flatten", () => {
+	it("should return a flat array", () => {
 		const result = flatten([0, [1, 1], 2, [3, 3, [4, [5, 6]], [[[[7]]], [8]], [9]], [10, [[11], 12]], 13]);
 		expect(result.length).toEqual(16);
 		expect(result).toEqual([0, 1, 1, 2, 3, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13]);