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Increase coverage for dynamic import and top-level await (#4421)
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// Copyright (C) 2025 Igalia, S.L. 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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esid: sec-ContinueDynamicImport
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description: >
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Dynamic import of an already errored module should fail
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info: |
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ContinueDynamicImport ( _promiseCapability_, _moduleCompletion_ )
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1. ...
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1. Let _module_ be _moduleCompletion_.[[Value]].
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1. Let _loadPromise_ be _module_.LoadRequestedModules().
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1. Let _rejectedClosure_ be a new Abstract Closure with parameters (_reason_) that captures _promiseCapability_ and performs the following steps when called:
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1. Perform ! Call(_promiseCapability_.[[Reject]], *undefined*, « _reason_ »).
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1. Return ~unused~.
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1. Let _onRejected_ be CreateBuiltinFunction(_rejectedClosure_, 1, *""*, « »).
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1. Let _linkAndEvaluateClosure_ be a new Abstract Closure with no parameters that captures _module_, _promiseCapability_, and _onRejected_ and performs the following steps when called:
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1. Let _link_ be Completion(_module_.Link()).
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1. ...
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1. Let _evaluatePromise_ be _module_.Evaluate().
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1. Let _fulfilledClosure_ be a new Abstract Closure with no parameters that captures _module_ and _promiseCapability_ and performs the following steps when called:
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1. Let _namespace_ be GetModuleNamespace(_module_).
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1. Perform ! <emu-meta effects="user-code">Call</emu-meta>(_promiseCapability_.[[Resolve]], *undefined*, « _namespace_ »).
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1. Return ~unused~.
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1. Let _onFulfilled_ be CreateBuiltinFunction(_fulfilledClosure_, 0, *""*, « »).
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1. Perform PerformPromiseThen(_evaluatePromise_, _onFulfilled_, _onRejected_).
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1. Return ~unused~.
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1. Let _linkAndEvaluate_ be CreateBuiltinFunction(_linkAndEvaluateClosure_, 0, *""*, « »).
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1. Perform PerformPromiseThen(_loadPromise_, _linkAndEvaluate_, _onRejected_).
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1. Return ~unused~.
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_module_ . Evaluate ( )
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4. If _module_.[[TopLevelCapability]] is not ~empty~, then
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a. Return _module_.[[TopLevelCapability]].[[Promise]].
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flags: [async]
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features: [dynamic-import]
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includes: [asyncHelpers.js]
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---*/
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asyncTest(async function () {
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await assert.throwsAsync(
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Error,
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() => import('./import-errored-module_FIXTURE.js'),
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'The import should reject (first import)'
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);
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await assert.throwsAsync(
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Error,
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() => import('./import-errored-module_FIXTURE.js'),
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'The import should reject (second import)'
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);
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});
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// Copyright (C) 2025 Igalia, S.L. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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throw new Error("boom");
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// Copyright (C) 2025 Igalia, S.L. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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// Copyright (C) 2025 Igalia, S.L. 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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esid: sec-ContinueDynamicImport
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description: >
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Dynamic import of an ~evaluating-async~ module waits for the module to finish its evaluation
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info: |
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ContinueDynamicImport ( _promiseCapability_, _moduleCompletion_ )
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1. ...
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1. Let _module_ be _moduleCompletion_.[[Value]].
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1. Let _loadPromise_ be _module_.LoadRequestedModules().
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1. Let _rejectedClosure_ be a new Abstract Closure with parameters (_reason_) that captures _promiseCapability_ and performs the following steps when called:
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1. Perform ! Call(_promiseCapability_.[[Reject]], *undefined*, « _reason_ »).
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1. Return ~unused~.
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1. Let _onRejected_ be CreateBuiltinFunction(_rejectedClosure_, 1, *""*, « »).
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1. Let _linkAndEvaluateClosure_ be a new Abstract Closure with no parameters that captures _module_, _promiseCapability_, and _onRejected_ and performs the following steps when called:
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1. Let _link_ be Completion(_module_.Link()).
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1. ...
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1. Let _evaluatePromise_ be _module_.Evaluate().
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1. Let _fulfilledClosure_ be a new Abstract Closure with no parameters that captures _module_ and _promiseCapability_ and performs the following steps when called:
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1. Let _namespace_ be GetModuleNamespace(_module_).
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1. Perform ! <emu-meta effects="user-code">Call</emu-meta>(_promiseCapability_.[[Resolve]], *undefined*, « _namespace_ »).
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1. Return ~unused~.
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1. Let _onFulfilled_ be CreateBuiltinFunction(_fulfilledClosure_, 0, *""*, « »).
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1. Perform PerformPromiseThen(_evaluatePromise_, _onFulfilled_, _onRejected_).
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1. Return ~unused~.
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1. Let _linkAndEvaluate_ be CreateBuiltinFunction(_linkAndEvaluateClosure_, 0, *""*, « »).
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1. Perform PerformPromiseThen(_loadPromise_, _linkAndEvaluate_, _onRejected_).
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1. Return ~unused~.
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_module_ . Evaluate ( )
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4. If _module_.[[TopLevelCapability]] is not ~empty~, then
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a. Return _module_.[[TopLevelCapability]].[[Promise]].
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flags: [async]
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features: [dynamic-import]
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includes: [asyncHelpers.js]
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---*/
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let continueExecution;
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globalThis.promise = new Promise((resolve) => continueExecution = resolve);
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const executionStartPromise = new Promise((resolve) => globalThis.executionStarted = resolve);
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asyncTest(async function () {
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const promiseForNamespace = import("./dynamic-import-of-waiting-module_FIXTURE.js");
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await executionStartPromise;
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const promiseForNamespace2 = import("./dynamic-import-of-waiting-module_FIXTURE.js");
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// We only continue execution of the first fixture file after importing a second,
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// empty, fixture file. This is so that if the implementation uses a separate
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// queue to resolve dynamic import promises, if dynamic-import-of-waiting-module_FIXTURE
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// wasn't waiting on top-level await its top-level promise would already be resolved.
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await import("./dynamic-import-of-waiting-module-2_FIXTURE.js");
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continueExecution();
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let secondPromiseResolved = false;
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await Promise.all([
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promiseForNamespace.then(() => {
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assert(!secondPromiseResolved, "The second import should not resolve before the first one");
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}),
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promiseForNamespace2.then(() => {
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secondPromiseResolved = true;
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})
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]);
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});
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// Copyright (C) 2025 Igalia, S.L. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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globalThis.executionStarted();
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export let x = 1;
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await globalThis.promise;
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