--require-main does not use --compilers flag

electron-mocha --renderer -R spec --compilers js:babel-core/register --require-main test/setup/main.js test/*.spec.js

Throws Unexpected token import.

Is there any way to enable babel compiler for main JS?

[inukshuk]

The preload scripts are inserted in the renderer’s browser window using script tags before mocha runs; it’s intended mostly for people testing UMD modules or websites, not really for Electron apps. I don’t know what ts-node/register does, but if it hooks into require for instance, it would certainly not convert your preload scripts.

[pronebird]

@inukshuk revisiting this problem once again after migrating to TypeScript. Basically here is what I do:

electron-mocha --renderer --reporter spec --require ts-node/register --require-main ts-node/register --require-main “test/setup/main.ts” --preload “test/setup/renderer.ts” “test/*.spec.ts”

But --preload script does not execute, I’ve modified the code of electron-mocha to print the options:

{ _allowUnknownOption: false,
  _versionOptionName: 'version',
  colors: true,
  reporter: 'spec',
  require: [ 'ts-node/register' ],
  ui: 'bdd',
  globals: [],
  timeouts: true,
  opts: 'test/mocha.opts',
  preload:
   [ '/Users/pronebird/app/test/setup/renderer.ts' ],
  requireMain:
   [ 'ts-node/register',
     '/Users/pronebird/app/test/setup/main.ts' ],
  rawArgs:
   [ '/Users/pronebird/app/node_modules/electron/dist/Electron.app/Contents/MacOS/Electron',
     '/Users/pronebird/app/node_modules/electron-mocha/index.js',
     '--renderer',
     '--reporter',
     'spec',
     '--require',
     'ts-node/register',
     '--require-main',
     'ts-node/register',
     '--require-main',
     'test/setup/main.ts',
     '--preload',
     'test/setup/renderer.ts',
     'test/jsonrpc-transport.spec.ts' ],
  renderer: true,
  files: [ 'test/jsonrpc-transport.spec.ts' ],
  reporterOptions: {} }

Replacing --preload with --require seem to fix this though.