esm: improve fetch_module test coverage and remove hack

PR-URL: https://github.com/nodejs/node/pull/41947
Reviewed-By: Geoffrey Booth <webadmin@geoffreybooth.com>

lib/internal/modules/esm/fetch_module.js

@@ -20,7 +20,6 @@ const {
 } = require('internal/errors').codes;
 const { URL } = require('internal/url');
 const net = require('net');
-const path = require('path');
 
 /**
  * @typedef CacheEntry
@@ -263,15 +262,9 @@ function fetchModule(parsed, { parentURL }) {
   if (parsed.protocol === 'http:') {
     return PromisePrototypeThen(isLocalAddress(parsed.hostname), (is) => {
       if (is !== true) {
-        let parent = parentURL;
-        const parentName = path.basename(parent.pathname);
-        if (
-          parentName === '[eval]' ||
-          parentName === '[stdin]'
-        ) parent = 'command-line';
         throw new ERR_NETWORK_IMPORT_DISALLOWED(
           href,
-          parent,
+          parentURL,
           'http can only be used to load local resources (use https instead).'
         );
       }

test/es-module/test-http-imports-cli.mjs

@@ -0,0 +1,48 @@
+import { mustCall } from '../common/index.mjs';
+import { match, notStrictEqual } from 'assert';
+import { spawn } from 'child_process';
+import { execPath } from 'process';
+
+{
+  const child = spawn(execPath, [
+    '--experimental-network-imports',
+    '--input-type=module',
+    '-e',
+    'import "http://example.com"',
+  ]);
+
+  let stderr = '';
+  child.stderr.setEncoding('utf8');
+  child.stderr.on('data', (data) => {
+    stderr += data;
+  });
+  child.on('close', mustCall((code, _signal) => {
+    notStrictEqual(code, 0);
+
+    // [ERR_NETWORK_IMPORT_DISALLOWED]: import of 'http://example.com/' by
+    //   …/[eval1] is not supported: http can only be used to load local
+    // resources (use https instead).
+    match(stderr, /[ERR_NETWORK_IMPORT_DISALLOWED]/);
+  }));
+}
+{
+  const child = spawn(execPath, [
+    '--experimental-network-imports',
+    '--input-type=module',
+  ]);
+  child.stdin.end('import "http://example.com"');
+
+  let stderr = '';
+  child.stderr.setEncoding('utf8');
+  child.stderr.on('data', (data) => {
+    stderr += data;
+  });
+  child.on('close', mustCall((code, _signal) => {
+    notStrictEqual(code, 0);
+
+    // [ERR_NETWORK_IMPORT_DISALLOWED]: import of 'http://example.com/' by
+    //   …/[stdin] is not supported: http can only be used to load local
+    // resources (use https instead).
+    match(stderr, /[ERR_NETWORK_IMPORT_DISALLOWED]/);
+  }));
+}

test/es-module/test-http-imports.mjs

@@ -114,7 +114,7 @@ for (const { protocol, createServer } of [
     }));
     await assert.rejects(
       import(crossProtocolRedirect.href),
-      'should not be able to redirect across protocols'
+      { code: 'ERR_NETWORK_IMPORT_DISALLOWED' }
     );
 
     const deps = new URL(url.href);
@@ -135,7 +135,8 @@ for (const { protocol, createServer } of [
       export default 1;`);
     await assert.rejects(
       import(fileDep.href),
-      'should not be able to load file: from http:');
+      { code: 'ERR_INVALID_URL_SCHEME' }
+    );
 
     const builtinDep = new URL(url.href);
     builtinDep.searchParams.set('body', `
@@ -144,7 +145,7 @@ for (const { protocol, createServer } of [
     `);
     await assert.rejects(
       import(builtinDep.href),
-      'should not be able to load node: from http:'
+      { code: 'ERR_INVALID_URL_SCHEME' }
     );
 
     const unprefixedBuiltinDep = new URL(url.href);
@@ -154,7 +155,7 @@ for (const { protocol, createServer } of [
     `);
     await assert.rejects(
       import(unprefixedBuiltinDep.href),
-      'should not be able to load unprefixed builtins from http:'
+      { code: 'ERR_INVALID_URL_SCHEME' }
     );
 
     const unsupportedMIME = new URL(url.href);
@@ -162,7 +163,7 @@ for (const { protocol, createServer } of [
     unsupportedMIME.searchParams.set('body', '');
     await assert.rejects(
       import(unsupportedMIME.href),
-      'should not be able to load unsupported MIMEs from http:'
+      { code: 'ERR_UNKNOWN_MODULE_FORMAT' }
     );
 
     server.close();