From 47d5a385082fdf7e12cbfbb0d31a96579237e08e Mon Sep 17 00:00:00 2001
From: Sven Slootweg <admin@cryto.net>
Date: Sun, 16 Feb 2020 23:27:59 +0100
Subject: [PATCH] Add isPlainObject validator

---
 index.js     | 12 ++++++++++--
 package.json |  3 ++-
 2 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/index.js b/index.js
index 7654919..87fe4c0 100644
--- a/index.js
+++ b/index.js
@@ -3,6 +3,7 @@
 const createError = require("create-error");
 const assureArray = require("assure-array");
 const defaultValue = require("default-value");
+const isPlainObj = require("is-plain-obj");
 const util = require("util");
 
 let ValidationError = createError("ValidationError", { path: [] });
@@ -136,7 +137,13 @@ function aggregrateErrors(errors) {
 function validateArguments(args, rules) {
 	let errors = validateArgumentList(args, rules);
 
-		aggregrateErrors(errors);
+	aggregrateErrors(errors);
+}
+
+function isPlainObject(value) {
+	if (!isPlainObj(value)) {
+		throw new ValidationError("Must be a plain object (eg. object literal)");
+	}
 }
 
 module.exports = {
@@ -148,7 +155,7 @@ module.exports = {
 	},
 	validateOptions: function (args, optionsRules) {
 		return validateArguments(args, [
-			["options", optionsRules]
+			["options", isPlainObject].concat(assureArray(optionsRules))
 		]);
 	},
 	ValidationError: ValidationError,
@@ -183,6 +190,7 @@ module.exports = {
 			throw new ValidationError("Must be a Buffer object");
 		}
 	},
+	isPlainObject: isPlainObject,
 	either: function (...alternatives) {
 		if (alternatives.length === 0) {
 			throw new Error("Must specify at least one alternative");
diff --git a/package.json b/package.json
index 72f1a88..e937ca1 100644
--- a/package.json
+++ b/package.json
@@ -8,6 +8,7 @@
   "dependencies": {
     "assure-array": "^1.0.0",
     "create-error": "^0.3.1",
-    "default-value": "^1.0.0"
+    "default-value": "^1.0.0",
+    "is-plain-obj": "^2.0.0"
   }
 }