Set module.path in Module constructor.

src/module.js

@@ -9,6 +9,7 @@ import SafeObject from "./safe/object.js"
 
 import assign from "./util/assign.js"
 import builtinIds from "./builtin-ids.js"
+import getModuleDirname from "./util/get-module-dirname.js"
 import isExtNode from "./path/is-ext-node.js"
 import isObjectLike from "./util/is-object-like.js"
 import maskFunction from "./util/mask-function.js"
@@ -31,14 +32,15 @@ const {
   ELECTRON
 } = ENV
 
-const Module = maskFunction(function (id, parent) {
+const Module = maskFunction(function (id = "", parent) {
   this.children = GenericArray.of()
   this.exports = GenericObject.create()
   this.filename = null
   this.id = id
   this.loaded = false
   this.parent = parent
   this.paths = void 0
+  this.path = getModuleDirname(this)
 
   const children = parent == null
     ? null

src/util/get-module-dirname.js

@@ -1,16 +1,35 @@
 import builtinLookup from "../builtin-lookup.js"
 import { dirname } from "../safe/path.js"
+import getFilePathfromURL from "./get-file-path-from-url.js"
+import isFileOrigin from "./is-file-origin.js"
 import isObject from "./is-object.js"
 import shared from "../shared.js"
 
 function init() {
   function getModuleDirname(mod) {
     if (isObject(mod)) {
-      const { filename } = mod
+      const { path } = mod
 
-      if (builtinLookup.has(mod.id)) {
+      if (typeof path === "string") {
+        return path
+      }
+
+      const { id } = mod
+
+      if (builtinLookup.has(id)) {
         return ""
-      } else if (typeof filename === "string") {
+      }
+
+      let { filename } = mod
+
+      if (filename === null &&
+          typeof id === "string") {
+        filename = isFileOrigin(id)
+          ? getFilePathfromURL(id)
+          : id
+      }
+
+      if (typeof filename === "string") {
         return dirname(filename)
       }
     }

test/cjs/intercept/dynamic-import.js

@@ -19,7 +19,7 @@ const content = [
 
 const filename = path.resolve(__dirname, "virtual.js")
 const intercepted = []
-const mod = new Module(".")
+const mod = new Module(filename)
 const oldRequire = Module.prototype.require
 
 Module.prototype.require = function (request) {

test/cjs/intercept/static-import.js

@@ -19,7 +19,7 @@ const content = [
 
 const filename = path.resolve(__dirname, "virtual.js")
 const intercepted = []
-const mod = new Module(".")
+const mod = new Module(filename)
 const oldRequire = Module.prototype.require
 
 Module.prototype.require = function (request) {