test: support for adding extra module paths (#26545)

Co-authored-by: David Sanders <[email protected]>

spec-main/index.js

@@ -4,6 +4,13 @@ const v8 = require('v8');
 
 Module.globalPaths.push(path.resolve(__dirname, '../spec/node_modules'));
 
+// Extra module paths which can be used to load Mocha reporters
+if (process.env.ELECTRON_TEST_EXTRA_MODULE_PATHS) {
+  for (const modulePath of process.env.ELECTRON_TEST_EXTRA_MODULE_PATHS.split(':')) {
+    Module.globalPaths.push(modulePath);
+  }
+}
+
 // We want to terminate on errors, not throw up a dialog
 process.on('uncaughtException', (err) => {
   console.error('Unhandled exception in main spec runner:', err);

spec/static/index.html

@@ -5,10 +5,18 @@
   // Deprecated APIs are still supported and should be tested.
   process.throwDeprecation = false
 
+  const Module = require('module');
   const path = require('path')
   const electron = require('electron')
   const { ipcRenderer } = electron
 
+  // Extra module paths which can be used to load Mocha reporters
+  if (process.env.ELECTRON_TEST_EXTRA_MODULE_PATHS) {
+    for (const modulePath of process.env.ELECTRON_TEST_EXTRA_MODULE_PATHS.split(':')) {
+      Module.globalPaths.push(modulePath);
+    }
+  }
+
   // Set up chai-as-promised here first to avoid conflicts
   // It must be loaded first or really strange things happen inside
   // chai that cause test failures