Add Object.freeze tests

test/built-ins/Object/assign/target-is-frozen-accessor-property-set-succeeds.js

@@ -0,0 +1,63 @@
+// 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 accessor property of frozen `target` succeeds.
+info: |
+  SetIntegrityLevel ( O, level )
+
+  [...]
+  3. Let status be ? O.[[PreventExtensions]]().
+  [...]
+  7. Else,
+    a. Assert: level is frozen.
+    b. For each element k of keys, do
+      i. Let currentDesc be ? O.[[GetOwnProperty]](k).
+      ii. If currentDesc is not undefined, then
+        1. If IsAccessorDescriptor(currentDesc) is true, then
+          a. Let desc be the PropertyDescriptor { [[Configurable]]: false }.
+        [...]
+        3. Perform ? DefinePropertyOrThrow(O, k, desc).
+  8. Return true.
+
+  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 = {
+  set foo(val) { value1 = val; },
+};
+
+Object.freeze(target1);
+Object.assign(target1, { foo: 2 });
+assert.sameValue(value1, 2);
+
+
+var sym = Symbol();
+var value2 = 1;
+var target2 = Object.freeze({
+  set [sym](val) { value2 = val; },
+});
+
+Object.freeze(target2);
+Object.assign(target2, { [sym]: 2 });
+assert.sameValue(value2, 2);

test/built-ins/Object/assign/target-is-frozen-data-property-set-throws.js

@@ -0,0 +1,59 @@
+// 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 data property of frozen `target` fails with TypeError.
+info: |
+  SetIntegrityLevel ( O, level )
+
+  [...]
+  3. Let status be ? O.[[PreventExtensions]]().
+  [...]
+  7. Else,
+    a. Assert: level is frozen.
+    b. For each element k of keys, do
+      i. Let currentDesc be ? O.[[GetOwnProperty]](k).
+      ii. If currentDesc is not undefined, then
+        1. If IsAccessorDescriptor(currentDesc) is true, then
+          [...]
+        2. Else,
+          a. Let desc be the PropertyDescriptor { [[Configurable]]: false, [[Writable]]: false }.
+        3. Perform ? DefinePropertyOrThrow(O, k, desc).
+  8. Return true.
+
+  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 )
+
+  [...]
+  3. If IsDataDescriptor(ownDesc) is true, then
+    a. If ownDesc.[[Writable]] is false, return false.
+features: [Symbol, Reflect]
+---*/
+
+var sym = Symbol();
+var target1 = { [sym]: 1 };
+
+Object.freeze(target1);
+assert.throws(TypeError, function() {
+  Object.assign(target1, { [sym]: 1 });
+});
+
+
+var target2 = Object.freeze({ foo: 1 });
+
+assert.throws(TypeError, function() {
+  Object.assign(target2, { foo: 1 });
+});