1 files changed, 42 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Proxy/defineProperty/targetdesc-not-configurable-writable-desc-not-writable.js b/js/src/tests/test262/built-ins/Proxy/defineProperty/targetdesc-not-configurable-writable-desc-not-writable.js
new file mode 100644
index 0000000000..902c835c04
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Proxy/defineProperty/targetdesc-not-configurable-writable-desc-not-writable.js
@@ -0,0 +1,42 @@
+// Copyright (C) 2019 Aleksey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-proxy-object-internal-methods-and-internal-slots-defineownproperty-p-desc
+description: >
+    Throw a TypeError exception if trap result is true, targetDesc is not configurable
+    and writable, while Desc is not writable.
+info: |
+    [[DefineOwnProperty]] (P, Desc)
+
+    ...
+    16. Else targetDesc is not undefined,
+        ...
+        c. If IsDataDescriptor(targetDesc) is true, targetDesc.[[Configurable]] is
+        false, and targetDesc.[[Writable]] is true, then
+            i. If Desc has a [[Writable]] field and Desc.[[Writable]] is
+            false, throw a TypeError exception.
+    ...
+features: [Proxy, Reflect, proxy-missing-checks]
+---*/
+
+var trapCalls = 0;
+var p = new Proxy({}, {
+  defineProperty: function(t, prop, desc) {
+    Object.defineProperty(t, prop, {
+      configurable: false,
+      writable: true,
+    });
+
+    trapCalls++;
+    return true;
+  },
+});
+
+assert.throws(TypeError, function() {
+  Reflect.defineProperty(p, "prop", {
+    writable: false,
+  });
+});
+assert.sameValue(trapCalls, 1);
+
+reportCompare(0, 0);