Add evaluation tests for `import.defer` with sync/async modules (#4375)

* Add evaluation tests for `import.defer` with sync/async modules

* Remove accidental import declaration

test/language/expressions/dynamic-import/import-defer/import-defer-async-module/main.js

@@ -0,0 +1,72 @@
+// Copyright (C) 2025 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ContinueDynamicImport
+description: >
+  `import.defer` causes eager evaluation if the module has top-level await
+info: |
+  13.3.10.1.1 ContinueDynamicImport (
+    _payload_: a DynamicImportState Record,
+    _moduleCompletion_: either a normal completion containing a Module Record or a throw completion,
+  ): ~UNUSED~
+    1. Let _promiseCapability_ be _payload_.[[PromiseCapability]].
+    1. Let _phase_ be _payload_.[[Phase]].
+    1. ...
+    1. Let _module_ be _moduleCompletion_.[[Value]].
+    1. Let _loadPromise_ be _module_.LoadRequestedModules().
+    1. ...
+    1. Let _linkAndEvaluateClosure_ be a new Abstract Closure with no parameters that captures _module_, _promiseCapability_, _phase_ and _onRejected_ and performs the following steps when called:
+      1. ...
+      1. Let _fulfilledClosure_ be a new Abstract Closure with no parameters that captures _module_, _phase_, and _promiseCapability_ and performs the following steps when called:
+        1. Let _namespace_ be GetModuleNamespace(_module_, _phase_).
+        1. Perform ! Call(_promiseCapability_.[[Resolve]], *undefined*, « _namespace_ »).
+        1. Return ~UNUSED~.
+      1. If _phase_ is ~defer~, then
+        1. Let _evaluationList_ be GatherAsynchronousTransitiveDependencies(_module_).
+        1. If _evaluationList_ is empty, then
+          1. Perform _fulfilledClosure_().
+          1. Return ~UNUSED~.
+        1. Let _asyncDepsEvaluationPromises_ be a new empty List.
+        1. For each Module Record _dep_ of _evaluationList_, append _dep_.Evaluate() to _asyncDepsEvaluationPromises_.
+        1. Let _iterator_ be CreateListIteratorRecord(_asyncDepsEvaluationPromises_).
+        1. Let _pc_ be ! NewPromiseCapability(%Promise%).
+        1. Let _evaluatePromise_ be ! PerformPromiseAll(_iterator_, %Promise%, _pc_, %Promise.resolve%).
+      1. Else,
+        1. ...
+      1. Let _onFulfilled_ be CreateBuiltinFunction(_fulfilledClosure_, *""*, 0, « »).
+      1. Perform PerformPromiseThen(_evaluatePromise_, _onFulfilled_, _onRejected_).
+      1. Return ~UNUSED~.
+    1. Let _linkAndEvaluate_ be CreateBuiltinFunction(_linkAndEvaluateClosure_, *""*, 0, « »).
+    1. Perform PerformPromiseThen(_loadPromise_, _linkAndEvaluate_, _onRejected_).
+    1. Return ~UNUSED~.
+
+  GatherAsynchronousTransitiveDependencies ( _module_, [ _seen_ ] )
+    1. If _seen_ is not specified, let _seen_ be a new empty List.
+    1. Let _result_ be a new empty List.
+    1. If _seen_ contains _module_, return _result_.
+    1. Append _module_ to _seen_.
+    1. If _module_ is not a Cyclic Module Record, return _result_.
+    1. If _module_.[[Status]] is either ~evaluating~ or ~evaluated~, return _result_.
+    1. If _module_.[[HasTLA]] is *true*, then
+      1. Append _module_ to _result_.
+      1. Return _result_.
+    1. For each ModuleRequest Record _required_ of _module_.[[RequestedModules]], do
+      1. Let _requiredModule_ be GetImportedModule(_module_, _required_.[[Specifier]]).
+      1. Let _additionalModules_ be GatherAsynchronousTransitiveDependencies(_requiredModule_, _seen_).
+      1. For each Module Record _m_ of _additionalModules_, do
+        1. If _result_ does not contain _m_, append _m_ to _result_.
+    1. Return _result_.
+
+flags: [module, async]
+features: [import-defer, top-level-await]
+includes: [compareArray.js]
+---*/
+
+import "./setup_FIXTURE.js";
+
+import.defer("./tla_FIXTURE.js").then(ns => {
+  assert.compareArray(globalThis.evaluations, ["tla start", "tla end"]);
+  ns.x;
+  assert.compareArray(globalThis.evaluations, ["tla start", "tla end"]);
+}).then($DONE, $DONE);

test/language/expressions/dynamic-import/import-defer/import-defer-async-module/setup_FIXTURE.js

@@ -0,0 +1,4 @@
+// Copyright (C) 2025 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+globalThis.evaluations = [];

test/language/expressions/dynamic-import/import-defer/import-defer-async-module/tla_FIXTURE.js

@@ -0,0 +1,8 @@
+// Copyright (C) 2025 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+globalThis.evaluations.push("tla start");
+
+await Promise.resolve(0);
+
+globalThis.evaluations.push("tla end");

test/language/expressions/dynamic-import/import-defer/import-defer-transitive-async-module/imports-tla_FIXTURE.js

@@ -0,0 +1,6 @@
+// Copyright (C) 2025 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+import "./tla_FIXTURE.js";
+
+globalThis.evaluations.push("imports-tla");

test/language/expressions/dynamic-import/import-defer/import-defer-transitive-async-module/main.js

@@ -0,0 +1,72 @@
+// Copyright (C) 2025 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ContinueDynamicImport
+description: >
+  `import.defer` causes eager evaluation of transitive dependencies with top-level await
+info: |
+  13.3.10.1.1 ContinueDynamicImport (
+    _payload_: a DynamicImportState Record,
+    _moduleCompletion_: either a normal completion containing a Module Record or a throw completion,
+  ): ~UNUSED~
+    1. Let _promiseCapability_ be _payload_.[[PromiseCapability]].
+    1. Let _phase_ be _payload_.[[Phase]].
+    1. ...
+    1. Let _module_ be _moduleCompletion_.[[Value]].
+    1. Let _loadPromise_ be _module_.LoadRequestedModules().
+    1. ...
+    1. Let _linkAndEvaluateClosure_ be a new Abstract Closure with no parameters that captures _module_, _promiseCapability_, _phase_ and _onRejected_ and performs the following steps when called:
+      1. ...
+      1. Let _fulfilledClosure_ be a new Abstract Closure with no parameters that captures _module_, _phase_, and _promiseCapability_ and performs the following steps when called:
+        1. Let _namespace_ be GetModuleNamespace(_module_, _phase_).
+        1. Perform ! Call(_promiseCapability_.[[Resolve]], *undefined*, « _namespace_ »).
+        1. Return ~UNUSED~.
+      1. If _phase_ is ~defer~, then
+        1. Let _evaluationList_ be GatherAsynchronousTransitiveDependencies(_module_).
+        1. If _evaluationList_ is empty, then
+          1. Perform _fulfilledClosure_().
+          1. Return ~UNUSED~.
+        1. Let _asyncDepsEvaluationPromises_ be a new empty List.
+        1. For each Module Record _dep_ of _evaluationList_, append _dep_.Evaluate() to _asyncDepsEvaluationPromises_.
+        1. Let _iterator_ be CreateListIteratorRecord(_asyncDepsEvaluationPromises_).
+        1. Let _pc_ be ! NewPromiseCapability(%Promise%).
+        1. Let _evaluatePromise_ be ! PerformPromiseAll(_iterator_, %Promise%, _pc_, %Promise.resolve%).
+      1. Else,
+        1. ...
+      1. Let _onFulfilled_ be CreateBuiltinFunction(_fulfilledClosure_, *""*, 0, « »).
+      1. Perform PerformPromiseThen(_evaluatePromise_, _onFulfilled_, _onRejected_).
+      1. Return ~UNUSED~.
+    1. Let _linkAndEvaluate_ be CreateBuiltinFunction(_linkAndEvaluateClosure_, *""*, 0, « »).
+    1. Perform PerformPromiseThen(_loadPromise_, _linkAndEvaluate_, _onRejected_).
+    1. Return ~UNUSED~.
+
+  GatherAsynchronousTransitiveDependencies ( _module_, [ _seen_ ] )
+    1. If _seen_ is not specified, let _seen_ be a new empty List.
+    1. Let _result_ be a new empty List.
+    1. If _seen_ contains _module_, return _result_.
+    1. Append _module_ to _seen_.
+    1. If _module_ is not a Cyclic Module Record, return _result_.
+    1. If _module_.[[Status]] is either ~evaluating~ or ~evaluated~, return _result_.
+    1. If _module_.[[HasTLA]] is *true*, then
+      1. Append _module_ to _result_.
+      1. Return _result_.
+    1. For each ModuleRequest Record _required_ of _module_.[[RequestedModules]], do
+      1. Let _requiredModule_ be GetImportedModule(_module_, _required_.[[Specifier]]).
+      1. Let _additionalModules_ be GatherAsynchronousTransitiveDependencies(_requiredModule_, _seen_).
+      1. For each Module Record _m_ of _additionalModules_, do
+        1. If _result_ does not contain _m_, append _m_ to _result_.
+    1. Return _result_.
+
+flags: [module, async]
+features: [import-defer, top-level-await]
+includes: [compareArray.js]
+---*/
+
+import "./setup_FIXTURE.js";
+
+import.defer("./imports-tla_FIXTURE.js").then(ns => {
+  assert.compareArray(globalThis.evaluations, ["tla start", "tla end"]);
+  ns.x;
+  assert.compareArray(globalThis.evaluations, ["tla start", "tla end", "imports-tla"]);
+}).then($DONE, $DONE);

test/language/expressions/dynamic-import/import-defer/import-defer-transitive-async-module/setup_FIXTURE.js

@@ -0,0 +1,4 @@
+// Copyright (C) 2025 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+globalThis.evaluations = [];

test/language/expressions/dynamic-import/import-defer/import-defer-transitive-async-module/tla_FIXTURE.js

@@ -0,0 +1,8 @@
+// Copyright (C) 2025 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+globalThis.evaluations.push("tla start");
+
+await Promise.resolve(0);
+
+globalThis.evaluations.push("tla end");

test/language/expressions/dynamic-import/import-defer/sync-dependency-of-deferred-async-module/dep_FIXTURE.js

@@ -0,0 +1,4 @@
+// Copyright (C) 2025 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+globalThis.evaluations.push("dep");

test/language/expressions/dynamic-import/import-defer/sync-dependency-of-deferred-async-module/imports-tla-with-dep_FIXTURE.js

@@ -0,0 +1,6 @@
+// Copyright (C) 2025 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+import "./tla-with-dep_FIXTURE.js";
+
+globalThis.evaluations.push("imports-tla-with-dep");

test/language/expressions/dynamic-import/import-defer/sync-dependency-of-deferred-async-module/main.js

@@ -0,0 +1,78 @@
+// Copyright (C) 2025 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ContinueDynamicImport
+description: >
+  `import.defer` causes eager evaluation of synchronous dependencies of async dependencies
+info: |
+  13.3.10.1.1 ContinueDynamicImport (
+    _payload_: a DynamicImportState Record,
+    _moduleCompletion_: either a normal completion containing a Module Record or a throw completion,
+  ): ~UNUSED~
+    1. Let _promiseCapability_ be _payload_.[[PromiseCapability]].
+    1. Let _phase_ be _payload_.[[Phase]].
+    1. ...
+    1. Let _module_ be _moduleCompletion_.[[Value]].
+    1. Let _loadPromise_ be _module_.LoadRequestedModules().
+    1. ...
+    1. Let _linkAndEvaluateClosure_ be a new Abstract Closure with no parameters that captures _module_, _promiseCapability_, _phase_ and _onRejected_ and performs the following steps when called:
+      1. ...
+      1. Let _fulfilledClosure_ be a new Abstract Closure with no parameters that captures _module_, _phase_, and _promiseCapability_ and performs the following steps when called:
+        1. Let _namespace_ be GetModuleNamespace(_module_, _phase_).
+        1. Perform ! Call(_promiseCapability_.[[Resolve]], *undefined*, « _namespace_ »).
+        1. Return ~UNUSED~.
+      1. If _phase_ is ~defer~, then
+        1. Let _evaluationList_ be GatherAsynchronousTransitiveDependencies(_module_).
+        1. If _evaluationList_ is empty, then
+          1. Perform _fulfilledClosure_().
+          1. Return ~UNUSED~.
+        1. Let _asyncDepsEvaluationPromises_ be a new empty List.
+        1. For each Module Record _dep_ of _evaluationList_, append _dep_.Evaluate() to _asyncDepsEvaluationPromises_.
+        1. Let _iterator_ be CreateListIteratorRecord(_asyncDepsEvaluationPromises_).
+        1. Let _pc_ be ! NewPromiseCapability(%Promise%).
+        1. Let _evaluatePromise_ be ! PerformPromiseAll(_iterator_, %Promise%, _pc_, %Promise.resolve%).
+      1. Else,
+        1. ...
+      1. Let _onFulfilled_ be CreateBuiltinFunction(_fulfilledClosure_, *""*, 0, « »).
+      1. Perform PerformPromiseThen(_evaluatePromise_, _onFulfilled_, _onRejected_).
+      1. Return ~UNUSED~.
+    1. Let _linkAndEvaluate_ be CreateBuiltinFunction(_linkAndEvaluateClosure_, *""*, 0, « »).
+    1. Perform PerformPromiseThen(_loadPromise_, _linkAndEvaluate_, _onRejected_).
+    1. Return ~UNUSED~.
+
+  GatherAsynchronousTransitiveDependencies ( _module_, [ _seen_ ] )
+    1. If _seen_ is not specified, let _seen_ be a new empty List.
+    1. Let _result_ be a new empty List.
+    1. If _seen_ contains _module_, return _result_.
+    1. Append _module_ to _seen_.
+    1. If _module_ is not a Cyclic Module Record, return _result_.
+    1. If _module_.[[Status]] is either ~evaluating~ or ~evaluated~, return _result_.
+    1. If _module_.[[HasTLA]] is *true*, then
+      1. Append _module_ to _result_.
+      1. Return _result_.
+    1. For each ModuleRequest Record _required_ of _module_.[[RequestedModules]], do
+      1. Let _requiredModule_ be GetImportedModule(_module_, _required_.[[Specifier]]).
+      1. Let _additionalModules_ be GatherAsynchronousTransitiveDependencies(_requiredModule_, _seen_).
+      1. For each Module Record _m_ of _additionalModules_, do
+        1. If _result_ does not contain _m_, append _m_ to _result_.
+    1. Return _result_.
+
+flags: [module, async]
+features: [import-defer, top-level-await]
+includes: [compareArray.js]
+---*/
+
+import "./setup_FIXTURE.js";
+
+import.defer("./imports-tla-with-dep_FIXTURE.js").then(ns => {
+  assert.compareArray(
+    globalThis.evaluations,
+    ["dep", "tla-with-dep start", "tla-with-dep end"]
+  );
+  ns.x;
+  assert.compareArray(
+    globalThis.evaluations,
+    ["dep", "tla-with-dep start", "tla-with-dep end", "imports-tla-with-dep"]
+  );
+}).then($DONE, $DONE);

test/language/expressions/dynamic-import/import-defer/sync-dependency-of-deferred-async-module/setup_FIXTURE.js

@@ -0,0 +1,4 @@
+// Copyright (C) 2025 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+globalThis.evaluations = [];

test/language/expressions/dynamic-import/import-defer/sync-dependency-of-deferred-async-module/tla-with-dep_FIXTURE.js

@@ -0,0 +1,10 @@
+// Copyright (C) 2025 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+import "./dep_FIXTURE.js";
+
+globalThis.evaluations.push("tla-with-dep start");
+
+await Promise.resolve(0);
+
+globalThis.evaluations.push("tla-with-dep end");

test/language/expressions/dynamic-import/import-defer/sync/dep_FIXTURE.js

@@ -0,0 +1,4 @@
+// Copyright (C) 2025 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+globalThis.evaluations.push("dep");

test/language/expressions/dynamic-import/import-defer/sync/main.js

@@ -0,0 +1,46 @@
+// Copyright (C) 2025 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ContinueDynamicImport
+description: >
+  `import.defer` of a sync module graph does not cause evaluation
+info: |
+  13.3.10.1.1 ContinueDynamicImport (
+    _payload_: a DynamicImportState Record,
+    _moduleCompletion_: either a normal completion containing a Module Record or a throw completion,
+  ): ~UNUSED~
+    1. Let _promiseCapability_ be _payload_.[[PromiseCapability]].
+    1. Let _phase_ be _payload_.[[Phase]].
+    1. ...
+    1. Let _module_ be _moduleCompletion_.[[Value]].
+    1. Let _loadPromise_ be _module_.LoadRequestedModules().
+    1. ...
+    1. Let _linkAndEvaluateClosure_ be a new Abstract Closure with no parameters that captures _module_, _promiseCapability_, _phase_ and _onRejected_ and performs the following steps when called:
+      1. ...
+      1. Let _fulfilledClosure_ be a new Abstract Closure with no parameters that captures _module_, _phase_, and _promiseCapability_ and performs the following steps when called:
+        1. Let _namespace_ be GetModuleNamespace(_module_, _phase_).
+        1. Perform ! Call(_promiseCapability_.[[Resolve]], *undefined*, « _namespace_ »).
+        1. Return ~UNUSED~.
+      1. If _phase_ is ~defer~, then
+        1. Let _evaluationList_ be GatherAsynchronousTransitiveDependencies(_module_).
+        1. If _evaluationList_ is empty, then
+          1. Perform _fulfilledClosure_().
+          1. Return ~UNUSED~.
+      1. ...
+    1. Let _linkAndEvaluate_ be CreateBuiltinFunction(_linkAndEvaluateClosure_, *""*, 0, « »).
+    1. Perform PerformPromiseThen(_loadPromise_, _linkAndEvaluate_, _onRejected_).
+    1. Return ~UNUSED~.
+
+flags: [module, async]
+features: [import-defer]
+includes: [compareArray.js]
+---*/
+
+import "./setup_FIXTURE.js";
+
+import.defer("./sync_FIXTURE.js").then(ns => {
+  assert.compareArray(globalThis.evaluations, []);
+  ns.x;
+  assert.compareArray(globalThis.evaluations, ["dep", "sync"]);
+}).then($DONE, $DONE);

test/language/expressions/dynamic-import/import-defer/sync/setup_FIXTURE.js

@@ -0,0 +1,4 @@
+// Copyright (C) 2025 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+globalThis.evaluations = [];

test/language/expressions/dynamic-import/import-defer/sync/sync_FIXTURE.js

@@ -0,0 +1,6 @@
+// Copyright (C) 2025 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+import "./dep_FIXTURE.js";
+
+globalThis.evaluations.push("sync");