Mocha ES Modules Example

mochainstance.mjs

import Mocha from "mocha"
export default new Mocha()

postrequire.mjs

import mocha from "./mochainstance.mjs"

mocha.suite.emit(
  "post-require",
  global,
  "If anything uses the file argument, you'd actually need one pre-require, require and post-require per test file with the test file name hardcoded here",
  mocha);

prerequire.mjs

import mocha from "./mochainstance.mjs"

mocha.suite.emit(
  "pre-require",
  global,
  "If anything uses the file argument, you'd actually need one pre-require, require and post-require per test file with the test file name hardcoded here",
  mocha);

require.mjs

import mocha from "./mochainstance.mjs"

mocha.suite.emit(
  "require",
  null /* if this is actually needed... then like the file argument, you'd need one of this file per test file to import the test file and pass the test file here */,
  "If anything uses the file argument, you'd actually need one pre-require, require and post-require per test file with the test file name hardcoded here",
  mocha);

run.mjs

import "./prerequire.mjs"
import "./test-forwardslash-file1.mjs"
import "./require.mjs"
import "./postrequire.mjs"

import "./prerequire.mjs"
import "./test-forwardslash-file2.js"
import "./require.mjs"
import "./postrequire.mjs"

import "./prerequire.mjs"
import "./test-forwardslash-file3.mjs"
import "./require.mjs"
import "./postrequire.mjs"

import mocha from "./mochainstance.mjs"
mocha.run(function(failures) {
  process.on("exit", function() {
    process.exit(failures > 0 ? 1 : 0);
  });
});

test-forwardslash-file1.mjs

describe("ES Module file 1", function() {
  it("should load this test", function() {})
})

test-forwardslash-file2.js

describe("CommonJS Module file 2", function() {
  it("should load this test", function() {})
})

test-forwardslash-file3.mjs

describe("ES Module file 3", function() {
  it("should load this test", function() {})
})