mirror of https://github.com/tc39/test262.git
40 lines
1.2 KiB
JavaScript
40 lines
1.2 KiB
JavaScript
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// Copyright (C) 2018 Rick Waldron. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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description: Module is evaluated exactly once
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esid: sec-moduleevaluation
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info: |
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[...]
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4. If module.[[Evaluated]] is true, return undefined.
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5. Set module.[[Evaluated]] to true.
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6. For each String required that is an element of module.[[RequestedModules]] do,
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a. Let requiredModule be ? HostResolveImportedModule(module, required).
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b. Perform ? requiredModule.ModuleEvaluation().
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[...]
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This test is meant to be flagged as module code, it should not initially
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run as script code or the result will not be the same.
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includes: [fnGlobalObject.js]
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flags: [async, module]
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features: [dynamic-import]
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---*/
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var global = fnGlobalObject();
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if (typeof global.evaluated === 'undefined') {
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global.evaluated = 0;
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}
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global.evaluated++;
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Promise.all([
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import('./eval-self-once-module.js'),
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import('./eval-self-once-module.js'),
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]).then(async () => {
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// Use await to serialize imports
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await import('./eval-self-once-module.js');
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await import('./eval-self-once-module.js');
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assert.sameValue(global.evaluated, 1, 'global property was defined and incremented only once');
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}).then($DONE, $DONE);
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