node/test/addons/hello-world-esm/test.js

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'use strict';
const common = require('../../common');
const assert = require('assert');
const { spawnSync } = require('child_process');
const { copyFileSync } = require('fs');
const { join } = require('path');
const buildDir = join(__dirname, 'build');
copyFileSync(join(buildDir, common.buildType, 'binding.node'),
join(buildDir, 'binding.node'));
const result = spawnSync(process.execPath,
['--experimental-modules', `${__dirname}/test.mjs`]);
assert.ifError(result.error);
// TODO: Uncomment this once ESM is no longer experimental.
// assert.strictEqual(result.stderr.toString().trim(), '');
assert.strictEqual(result.stdout.toString().trim(), 'binding.hello() = world');