vm: reuse validateString of internal/validators

PR-URL: #25074
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Anto Aravinth <anto.aravinth.cse@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Daijiro Wachi <daijiro.wachi@gmail.com>

lib/vm.js

@@ -33,7 +33,11 @@ const {
   ERR_VM_MODULE_NOT_MODULE,
 } = require('internal/errors').codes;
 const { isModuleNamespaceObject, isArrayBufferView } = require('util').types;
-const { validateInt32, validateUint32 } = require('internal/validators');
+const {
+  validateInt32,
+  validateUint32,
+  validateString
+} = require('internal/validators');
 const kParsingContext = Symbol('script parsing context');
 
 const ArrayForEach = Function.call.bind(Array.prototype.forEach);
@@ -58,9 +62,7 @@ class Script extends ContextifyScript {
       [kParsingContext]: parsingContext,
     } = options;
 
-    if (typeof filename !== 'string') {
-      throw new ERR_INVALID_ARG_TYPE('options.filename', 'string', filename);
-    }
+    validateString(filename, 'options.filename');
     validateInt32(lineOffset, 'options.lineOffset');
     validateInt32(columnOffset, 'options.columnOffset');
     if (cachedData !== undefined && !isArrayBufferView(cachedData)) {
@@ -149,11 +151,6 @@ function validateContext(sandbox) {
   }
 }
 
-function validateString(prop, propName) {
-  if (prop !== undefined && typeof prop !== 'string')
-    throw new ERR_INVALID_ARG_TYPE(propName, 'string', prop);
-}
-
 function validateBool(prop, propName) {
   if (prop !== undefined && typeof prop !== 'boolean')
     throw new ERR_INVALID_ARG_TYPE(propName, 'boolean', prop);
@@ -208,8 +205,10 @@ function getContextOptions(options) {
         wasm: options.contextCodeGeneration.wasm,
       } : undefined,
     };
-    validateString(contextOptions.name, 'options.contextName');
-    validateString(contextOptions.origin, 'options.contextOrigin');
+    if (contextOptions.name !== undefined)
+      validateString(contextOptions.name, 'options.contextName');
+    if (contextOptions.origin !== undefined)
+      validateString(contextOptions.origin, 'options.contextOrigin');
     if (contextOptions.codeGeneration) {
       validateBool(contextOptions.codeGeneration.strings,
                    'options.contextCodeGeneration.strings');
@@ -244,10 +243,9 @@ function createContext(sandbox = {}, options = {}) {
     codeGeneration
   } = options;
 
-  if (typeof name !== 'string') {
-    throw new ERR_INVALID_ARG_TYPE('options.name', 'string', options.name);
-  }
-  validateString(origin, 'options.origin');
+  validateString(name, 'options.name');
+  if (origin !== undefined)
+    validateString(origin, 'options.origin');
   validateObject(codeGeneration, 'options.codeGeneration');
 
   let strings = true;
@@ -319,18 +317,12 @@ function runInThisContext(code, options) {
 }
 
 function compileFunction(code, params, options = {}) {
-  if (typeof code !== 'string') {
-    throw new ERR_INVALID_ARG_TYPE('code', 'string', code);
-  }
+  validateString(code, 'code');
   if (params !== undefined) {
     if (!ArrayIsArray(params)) {
       throw new ERR_INVALID_ARG_TYPE('params', 'Array', params);
     }
-    ArrayForEach(params, (param, i) => {
-      if (typeof param !== 'string') {
-        throw new ERR_INVALID_ARG_TYPE(`params[${i}]`, 'string', param);
-      }
-    });
+    ArrayForEach(params, (param, i) => validateString(param, `params[${i}]`));
   }
 
   const {
@@ -343,9 +335,7 @@ function compileFunction(code, params, options = {}) {
     contextExtensions = [],
   } = options;
 
-  if (typeof filename !== 'string') {
-    throw new ERR_INVALID_ARG_TYPE('options.filename', 'string', filename);
-  }
+  validateString(filename, 'options.filename');
   validateUint32(columnOffset, 'options.columnOffset');
   validateUint32(lineOffset, 'options.lineOffset');
   if (cachedData !== undefined && !isArrayBufferView(cachedData)) {