Add test for importing already evaluated async module

test/language/module-code/top-level-await/import-evaluated-non-root-module.js

@@ -0,0 +1,40 @@
+// Copyright (C) 2025 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-moduleevaluation
+description: >
+  Import of an async module that is already evaluated, was not previously used
+  as an entrypoint, and is not in a cycle, and thus has an [[CycleRoot]] that
+  refers to itself and an empty [[TopLevelCapability]].
+info: |
+     Cyclic Module Record's Evaluate ( )
+        1. Assert: This call to Evaluate is not happening at the same time as another call to Evaluate within the surrounding agent.
+        2. Assert: module.[[Status]] is one of linked, evaluating-async, or evaluated.
+        3. If module.[[Status]] is either evaluating-async or evaluated, set module to module.[[CycleRoot]].
+        4. If module.[[TopLevelCapability]] is not empty, then
+          a. Return module.[[TopLevelCapability]].[[Promise]].
+        5. Let stack be a new empty List.
+        6. Let capability be ! NewPromiseCapability(%Promise%).
+        7. Set module.[[TopLevelCapability]] to capability.
+        8. Let result be Completion(InnerModuleEvaluation(module, stack, 0)).
+        9. If result is an abrupt completion, then
+          ...
+        10. Else,
+          a. Assert: module.[[Status]] is either evaluating-async or evaluated.
+          b. Assert: module.[[EvaluationError]] is empty.
+          c. If module.[[Status]] is evaluated, then
+            i. Assert: module.[[AsyncEvaluationOrder]] is not an integer.
+            ii. Perform ! Call(capability.[[Resolve]], undefined, « undefined »).
+          d. Assert: stack is empty.
+        11. Return capability.[[Promise]].
+flags: [module, async]
+features: [top-level-await]
+---*/
+
+import "./import-evaluated-non-root-module_FIXTURE.js";
+
+const ns = await import("./import-evaluated-non-root-module_FIXTURE.js");
+assert.sameValue(ns.x, 1);
+
+$DONE();

test/language/module-code/top-level-await/import-evaluated-non-root-module_FIXTURE.js

@@ -0,0 +1,5 @@
+// Copyright (C) 2025 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+await null;
+export let x = 1;