test: remove a bunch of usage of the remote module (#21119)

spec-main/fixtures/module/delete-buffer.js

@@ -0,0 +1,11 @@
+const path = require('path')
+const { remote } = require('electron')
+const { Buffer } = window
+
+delete window.Buffer
+delete global.Buffer
+
+// Test that remote.js doesn't use Buffer global
+remote.require(path.join(__dirname, 'print_name.js')).echo(Buffer.from('bar'))
+
+window.test = Buffer.from('buffer')

spec-main/fixtures/module/preload-remote.js

@@ -0,0 +1,5 @@
+const { ipcRenderer, remote } = require('electron')
+
+window.onload = function () {
+  ipcRenderer.send('remote', typeof remote)
+}

spec-main/fixtures/module/print_name.js

@@ -0,0 +1,36 @@
+exports.print = function (obj) {
+  return obj.constructor.name
+}
+
+exports.echo = function (obj) {
+  return obj
+}
+
+const typedArrays = {
+  Int8Array,
+  Uint8Array,
+  Uint8ClampedArray,
+  Int16Array,
+  Uint16Array,
+  Int32Array,
+  Uint32Array,
+  Float32Array,
+  Float64Array
+}
+
+exports.typedArray = function (type, values) {
+  const constructor = typedArrays[type]
+  const array = new constructor(values.length)
+  for (let i = 0; i < values.length; ++i) {
+    array[i] = values[i]
+  }
+  return array
+}
+
+exports.getNaN = function () {
+  return NaN
+}
+
+exports.getInfinity = function () {
+  return Infinity
+}