1 files changed, 42 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Proxy/getOwnPropertyDescriptor/resultdesc-is-not-configurable-not-writable-targetdesc-is-writable.js b/js/src/tests/test262/built-ins/Proxy/getOwnPropertyDescriptor/resultdesc-is-not-configurable-not-writable-targetdesc-is-writable.js
new file mode 100644
index 0000000000..bc4537b651
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Proxy/getOwnPropertyDescriptor/resultdesc-is-not-configurable-not-writable-targetdesc-is-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-getownproperty-p
+description: >
+    Throws a TypeError exception if resultDesc is both non-configurable and
+    non-writable, while targetDesc is writable.
+info: |
+    [[GetOwnProperty]] (P)
+
+    ...
+    17. If resultDesc.[[Configurable]] is false, then
+        ...
+        b. If resultDesc has a [[Writable]] field and resultDesc.[[Writable]] is
+        false, then
+            i. If targetDesc.[[Writable]] is true, throw a TypeError exception.
+    ...
+features: [Proxy, proxy-missing-checks]
+---*/
+
+var trapCalls = 0;
+var p = new Proxy({}, {
+  getOwnPropertyDescriptor: function(t, prop) {
+    Object.defineProperty(t, prop, {
+      configurable: false,
+      writable: true,
+    });
+
+    trapCalls++;
+    return {
+      configurable: false,
+      writable: false,
+    };
+  },
+});
+
+assert.throws(TypeError, function() {
+  Object.getOwnPropertyDescriptor(p, "prop");
+});
+assert.sameValue(trapCalls, 1);
+
+reportCompare(0, 0);