Fix import defer test bugs

Author: nicolo-ribaudo

test/language/import/import-defer/deferred-namespace-object/exotic-object-behavior.js

@@ -43,10 +43,11 @@ assert.compareArray(
   "Deferred namespaces' keys are the exports sorted alphabetically, followed by @@toStringTag"
 );
 
-verifyProperty(ns, "foo", {
-  value: 1,
-  writable: true,
-  enumerable: true,
-  configurable: false,
-});
+// We cannot use `verifyProperty` because the property _looks_ writable, but it's actually not
+const desc = Reflect.getOwnPropertyDescriptor(ns, "foo");
+assert.sameValue(desc.value, 1, "The value of the 'foo' property is 1");
+assert.sameValue(desc.writable, true, "The 'foo' property is writable");
+assert.sameValue(desc.enumerable, true, "The 'foo' property is enumerable");
+assert.sameValue(desc.configurable, false, "The 'foo' property is not configurable");
+
 assert.sameValue(Reflect.getOwnPropertyDescriptor(ns, "non-existent"), undefined, "No descriptors for non-exports");

test/language/import/import-defer/errors/get-self-while-defer-evaluating/main.js

@@ -37,6 +37,6 @@ features: [import-defer]
 
 import defer * as ns from "./dep_FIXTURE.js";
 
-assert(globalThis["error on ns.foo"] instanceof TypeError, "ns.foo while evaluating throws a TypeError");
+ns.x;
 
-ns.foo;
+assert(globalThis["error on ns.foo"] instanceof TypeError, "ns.foo while evaluating throws a TypeError");

test/language/import/import-defer/errors/module-throws/import-defer-throws_FIXTURE.js

@@ -1,5 +1,5 @@
 // Copyright (C) 2024 Igalia, S.L. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 
-import defer * as ns from "./import-defer-throws_FIXTURE.js";
+import defer * as ns from "./throws_FIXTURE.js";
 export { ns };

test/language/import/import-defer/evaluation-top-level-await/flattening-order/main.js

@@ -63,8 +63,7 @@ assert.compareArray(globalThis.evaluations, [
   "2.1.1 end",
   "2.2 end",
   "4.1 start",
-  "4.1 end",
-  "5"
+  "4.1 end"
 ]);
 
 globalThis.evaluations = [];