1 files changed, 52 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Object/assign/target-is-non-extensible-existing-accessor-property.js b/js/src/tests/test262/built-ins/Object/assign/target-is-non-extensible-existing-accessor-property.js
new file mode 100644
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+++ b/js/src/tests/test262/built-ins/Object/assign/target-is-non-extensible-existing-accessor-property.js
@@ -0,0 +1,52 @@
+// Copyright (C) 2021 Alexey Shvayka. All rights reserved.
+// This code is governed by the license found in the LICENSE file.
+
+/*---
+esid: sec-object.assign
+description: >
+  [[Set]] to existing accessor property of non-extensible `target` is successful.
+info: |
+  OrdinaryPreventExtensions ( O )
+
+  1. Set O.[[Extensible]] to false.
+
+  Object.assign ( target, ...sources )
+
+  [...]
+  3. For each element nextSource of sources, do
+    a. If nextSource is neither undefined nor null, then
+      [...]
+      iii. For each element nextKey of keys, do
+        1. Let desc be ? from.[[GetOwnProperty]](nextKey).
+        2. If desc is not undefined and desc.[[Enumerable]] is true, then
+          [...]
+          b. Perform ? Set(to, nextKey, propValue, true).
+
+  OrdinarySetWithOwnDescriptor ( O, P, V, Receiver, ownDesc )
+
+  [...]
+  7. Perform ? Call(setter, Receiver, « V »).
+  8. Return true.
+features: [Symbol]
+---*/
+
+var value1 = 1;
+var target1 = Object.preventExtensions({
+  set foo(val) { value1 = val; },
+});
+
+Object.assign(target1, { foo: 2 });
+assert.sameValue(value1, 2);
+
+
+var sym = Symbol();
+var value2 = 1;
+var target2 = {
+  set [sym](val) { value2 = val; },
+};
+
+Object.preventExtensions(target2);
+Object.assign(target2, { [sym]: 2 });
+assert.sameValue(value2, 2);
+
+reportCompare(0, 0);