[import-defer]: Adding test to validate deferred namespaces exports

test/language/import/import-defer/deferred-namespace-object/deferred_ns_export_FIXTURE.js

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+// Copyright (C) 2026 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+import "./setup_FIXTURE.js";
+import defer * as ns from "./dep2_FIXTURE.js";
+
+globalThis.evaluations.push("reexport");
+
+export { ns };

test/language/import/import-defer/deferred-namespace-object/dep2_FIXTURE.js

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+// Copyright (C) 2026 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+globalThis.evaluations.push("dep");
+
+export let foo = 42;

test/language/import/import-defer/deferred-namespace-object/reexport-deferred-ns-evaluation.js

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+// Copyright (C) 2026 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-resolveexport
+description: >
+  Re-exported deferred namespace preserves deferred semantics
+info: |
+  ResolveExport ( _exportName_ )
+    1. ...
+    1. For each ExportEntry Record _e_ of _module_.[[IndirectExportEntries]], do
+      1. If _e_.[[ExportName]] is _exportName_, then
+        1. Assert: _e_.[[ModuleRequest]] is not *null*.
+        1. Let _importedModule_ be GetImportedModule(_module_, _e_.[[ModuleRequest]]).
+        1. If _e_.[[ImportName]] is ~all~, then
+          1. Assert: _module_ does not provide the direct binding for this export.
+          1. If _e_.[[ModuleRequest]].[[Phase]] is ~defer~, then
+            1. Return ResolvedBinding Record { [[Module]]: _importedModule_,
+               [[BindingName]]: ~deferred-namespace~ }.
+          1. Else,
+            1. Assert: _e_.[[Phase]] is ~evaluation~.
+            1. Return ResolvedBinding Record { [[Module]]: _importedModule_,
+               [[BindingName]]: ~namespace~ }.
+flags: [module]
+features: [import-defer]
+includes: [compareArray.js]
+---*/
+
+import { ns } from "./deferred_ns_export_FIXTURE.js";
+
+assert.compareArray(globalThis.evaluations, ["reexport"],
+  "deferred module should not be evaluated");
+
+assert.sameValue(ns[Symbol.toStringTag], "Deferred Module",
+  "'ns' should be a deferred namespace object");
+
+assert.sameValue(ns.foo, 42);
+assert.compareArray(globalThis.evaluations, ["reexport", "dep"],
+  "deferred module should be evaluated after property access");

test/language/import/import-defer/deferred-namespace-object/setup_FIXTURE.js

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+// Copyright (C) 2026 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+globalThis.evaluations = [];