JSTests/test262/test/language/expressions/dynamic-import/eval-rqstd-once.js

// Copyright (C) 2018 Rick Waldron. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
description: Requested modules are evaluated exactly once
esid: sec-moduleevaluation
info: |
    [...]
    4. If module.[[Evaluated]] is true, return undefined.
    5. Set module.[[Evaluated]] to true.
    6. For each String required that is an element of module.[[RequestedModules]] do,
       a. Let requiredModule be ? HostResolveImportedModule(module, required).
       b. Perform ? requiredModule.ModuleEvaluation().
    [...]
includes: [fnGlobalObject.js]
flags: [async]
features: [dynamic-import]
---*/

var global = fnGlobalObject();

Promise.all([
  import('./eval-rqstd-once_FIXTURE.js'),
  import('./eval-rqstd-once_FIXTURE.js'),
]).then(async () => {
  // Use await to serialize imports
  await import('./eval-rqstd-once_FIXTURE.js');
  await import('./eval-rqstd-once_FIXTURE.js');

  assert.sameValue(global.test262, 262, 'global property was defined');
}).then($DONE, $DONE);