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37 lines
1.3 KiB
JavaScript
37 lines
1.3 KiB
JavaScript
// Copyright (C) 2018 Leo Balter. 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: >
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Dynamic Import receives an AssignmentExpression (ImportMeta)
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esid: prod-ImportCall
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info: |
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ImportCall [Yield]:
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import ( AssignmentExpression[+In, ?Yield] )
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Runtime Semantics: Evaluation
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ImportCall : import ( AssignmentExpression )
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...
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5. Let specifierString be ToString(specifier).
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6. IfAbruptRejectPromise(specifierString, promiseCapability).
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features: [dynamic-import, import.meta]
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flags: [module, async]
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---*/
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const p = import(import.meta);
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// We can at least assert p is a promise.
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assert.sameValue(Promise.resolve(p), p, 'Assert that p is a promise');
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// The keys of import.meta are implementation defined, but we know its
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// [[Prototype]] is null. In this case, import() should reject the
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// promise it returns, unless a toPrimitive related method is set.
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if (!Object.prototype.hasOwnProperty.call(import.meta, 'toString') &&
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!Object.prototype.hasOwnProperty.call(import.meta, 'valueOf') &&
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!Object.prototype.hasOwnProperty.call(import.meta, Symbol.toPrimitive)) {
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p.catch(error => assert.sameValue(error.constructor, TypeError, 'import() cannot resolve import.meta')).then($DONE, $DONE);
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} else {
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$DONE();
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}
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