lib: use validateObject

Used the validateObject() validator to keep consistency instead of a
custom validator which was only used to validate objects.
Refs: nodejs#39595

Author: VoltrexKeyva

lib/internal/encoding.js

@@ -39,7 +39,10 @@ const {
   isUint8Array
 } = require('internal/util/types');
 
-const { validateString } = require('internal/validators');
+const {
+  validateString,
+  validateObject,
+} = require('internal/validators');
 
 const {
   encodeInto,
@@ -63,12 +66,6 @@ function validateDecoder(obj) {
     throw new ERR_INVALID_THIS('TextDecoder');
 }
 
-function validateArgument(prop, expected, propName, expectedName) {
-  // eslint-disable-next-line valid-typeof
-  if (typeof prop !== expected)
-    throw new ERR_INVALID_ARG_TYPE(propName, expectedName, prop);
-}
-
 const CONVERTER_FLAGS_FLUSH = 0x1;
 const CONVERTER_FLAGS_FATAL = 0x2;
 const CONVERTER_FLAGS_IGNORE_BOM = 0x4;
@@ -381,7 +378,10 @@ function makeTextDecoderICU() {
   class TextDecoder {
     constructor(encoding = 'utf-8', options = {}) {
       encoding = `${encoding}`;
-      validateArgument(options, 'object', 'options', 'Object');
+      validateObject(options, 'options', {
+        nullable: true,
+        allowArray: true
+      });
 
       const enc = getEncodingFromLabel(encoding);
       if (enc === undefined)
@@ -413,7 +413,10 @@ function makeTextDecoderICU() {
                                        ['ArrayBuffer', 'ArrayBufferView'],
                                        input);
       }
-      validateArgument(options, 'object', 'options', 'Object');
+      validateObject(options, 'options', {
+        nullable: true,
+        allowArray: true
+      });
 
       let flags = 0;
       if (options !== null)
@@ -447,7 +450,10 @@ function makeTextDecoderJS() {
   class TextDecoder {
     constructor(encoding = 'utf-8', options = {}) {
       encoding = `${encoding}`;
-      validateArgument(options, 'object', 'options', 'Object');
+      validateObject(options, 'options', {
+        nullable: true,
+        allowArray: true
+      });
 
       const enc = getEncodingFromLabel(encoding);
       if (enc === undefined || !hasConverter(enc))
@@ -481,7 +487,10 @@ function makeTextDecoderJS() {
                                        ['ArrayBuffer', 'ArrayBufferView'],
                                        input);
       }
-      validateArgument(options, 'object', 'options', 'Object');
+      validateObject(options, 'options', {
+        nullable: true,
+        allowArray: true
+      });
 
       if (this[kFlags] & CONVERTER_FLAGS_FLUSH) {
         this[kBOMSeen] = false;