Test a module depending on a non-root node of an async cycle

Author: nicolo-ribaudo

test/language/module-code/top-level-await/pending-async-dep-from-cycle.js

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+// Copyright (C) 2025 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-innermoduleevaluation
+description: >
+  A module depending on an async module of a separate cycle should wait for the cycle root to complete
+info: |
+  Module graph:
+
+                ┌──────────────────┐
+                │   entrypoint     │
+                └──────────────────┘
+                    │           │
+                    ▼           ▼
+    ┌──────────────────┐     ┌────────────────────────┐
+    │ cycle root (TLA) │     │ importer of cycle leaf │
+    └──────────────────┘     └────────────────────────┘
+           │    ▲               │
+           ▼    │               │
+    ┌──────────────────┐        │
+    │ cycle leaf (TLA) │ ◄──────┘
+    └──────────────────┘
+
+  This test exercises step 11.c.iv.1 of the following algorithm when _module_ is
+  "importer of cycle leaf", _requiredModule_ is "cycle leaf (TLA)", and
+  _requiredModule_.[[CycleRoot]] is "cycle root (TLA)".
+  The [[Status]] of "cycle leaf (TLA)" and of "cycle root (TLA)" is ~evaluating-async~,
+  because they have alredy been traversed and they are blocked on the TLA in "cycle leaf (TLA)".
+  Thus, their [[AsyncEvaluationOrder]] is an integer, so the _requiredModule_ variable is used
+  to determine what module "importer of cycle leaf" should wait for.
+
+    InnerModuleEvaluation ( module, stack, index )
+        ...
+        11. For each ModuleRequest Record request of module.[[RequestedModules]], do
+            a. Let requiredModule be GetImportedModule(module, request).
+            b. Set index to ? InnerModuleEvaluation(requiredModule, stack, index).
+            c. If requiredModule is a Cyclic Module Record, then
+                i. Assert: requiredModule.[[Status]] is one of evaluating, evaluating-async, or evaluated.
+                ii. Assert: requiredModule.[[Status]] is evaluating if and only if stack contains requiredModule.
+                iii. If requiredModule.[[Status]] is evaluating, then
+                    1. Set module.[[DFSAncestorIndex]] to min(module.[[DFSAncestorIndex]], requiredModule.[[DFSAncestorIndex]]).
+                iv. Else,
+                    1. Set requiredModule to requiredModule.[[CycleRoot]].
+                    2. Assert: requiredModule.[[Status]] is either evaluating-async or evaluated.
+                    3. If requiredModule.[[EvaluationError]] is not empty, return ? requiredModule.[[EvaluationError]].
+                v. If requiredModule.[[AsyncEvaluationOrder]] is an integer, then
+                    1. Set module.[[PendingAsyncDependencies]] to module.[[PendingAsyncDependencies]] + 1.
+                    2. Append module to requiredModule.[[AsyncParentModules]].
+
+flags: [module, async]
+features: [top-level-await]
+includes: [compareArray.js]
+---*/
+
+import "./pending-async-dep-from-cycle_setup_FIXTURE.js";
+import "./pending-async-dep-from-cycle_cycle-root_FIXTURE.js";
+import "./pending-async-dep-from-cycle_import-cycle-leaf_FIXTURE.js";
+
+assert.compareArray(globalThis.logs, [
+  "cycle leaf start",
+  "cycle leaf end",
+  "cycle root start",
+  // Without the step covered by this test,
+  // these last two entries would be swapped.
+  "cycle root end",
+  "importer of cycle leaf"
+]);
+
+$DONE();

test/language/module-code/top-level-await/pending-async-dep-from-cycle_cycle-leaf_FIXTURE.js

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+// Copyright (C) 2025 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+import "./pending-async-dep-from-cycle_cycle-root_FIXTURE.js";
+
+globalThis.logs.push("cycle leaf start");
+await 1;
+globalThis.logs.push("cycle leaf end");

test/language/module-code/top-level-await/pending-async-dep-from-cycle_cycle-root_FIXTURE.js

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+// Copyright (C) 2025 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+import "./pending-async-dep-from-cycle_cycle-leaf_FIXTURE.js";
+
+globalThis.logs.push("cycle root start");
+await 1;
+globalThis.logs.push("cycle root end");

test/language/module-code/top-level-await/pending-async-dep-from-cycle_import-cycle-leaf_FIXTURE.js

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+// Copyright (C) 2025 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+import "./pending-async-dep-from-cycle_cycle-leaf_FIXTURE.js";
+
+globalThis.logs.push("importer of cycle leaf");

test/language/module-code/top-level-await/pending-async-dep-from-cycle_setup_FIXTURE.js

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