1 files changed, 51 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/expressions/new/spread-obj-override-immutable.js b/js/src/tests/test262/language/expressions/new/spread-obj-override-immutable.js
new file mode 100644
index 0000000000..2689c35e24
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/new/spread-obj-override-immutable.js
@@ -0,0 +1,51 @@
+// This file was procedurally generated from the following sources:
+// - src/spread/obj-override-immutable.case
+// - src/spread/default/member-expr.template
+/*---
+description: Object Spread overriding immutable properties (`new` operator)
+esid: sec-new-operator-runtime-semantics-evaluation
+features: [object-spread]
+flags: [generated]
+includes: [propertyHelper.js]
+info: |
+    MemberExpression : new MemberExpression Arguments
+
+    1. Return EvaluateNew(MemberExpression, Arguments).
+
+    12.3.3.1.1 Runtime Semantics: EvaluateNew
+
+    6. If arguments is empty, let argList be an empty List.
+    7. Else,
+       a. Let argList be ArgumentListEvaluation of arguments.
+       [...]
+---*/
+
+let o = {b: 2};
+Object.defineProperty(o, "a", {value: 1, enumerable: true, writable: false, configurable: true});
+
+
+var callCount = 0;
+
+new function(obj) {
+  assert.sameValue(obj.a, 3)
+  assert.sameValue(obj.b, 2);
+
+  verifyProperty(obj, "a", {
+    enumerable: true,
+    writable: true,
+    configurable: true,
+    value: 3
+  });
+
+  verifyProperty(obj, "b", {
+    enumerable: true,
+    writable: true,
+    configurable: true,
+    value: 2
+  });
+  callCount += 1;
+}({...o, a: 3});
+
+assert.sameValue(callCount, 1);
+
+reportCompare(0, 0);