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-rw-r--r--js/src/jit-test/tests/proxy/testDirectProxyValidateProperty5.js26
1 files changed, 26 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/proxy/testDirectProxyValidateProperty5.js b/js/src/jit-test/tests/proxy/testDirectProxyValidateProperty5.js
new file mode 100644
index 0000000000..0cc3cb8e0c
--- /dev/null
+++ b/js/src/jit-test/tests/proxy/testDirectProxyValidateProperty5.js
@@ -0,0 +1,26 @@
+load(libdir + "asserts.js");
+
+/*
+ * Throw a TypeError if both the current descriptor and the descriptor returned
+ * by the trap are data descriptors, the current descriptor is non-configurable
+ * and non-writable, and the descriptor returned by the trap does not have the
+ * same value.
+ */
+var target = {};
+Object.defineProperty(target, 'foo', {
+ value: 'bar',
+ writable: false,
+ configurable: false
+});
+var caught = false;
+assertThrowsInstanceOf(function () {
+ Object.getOwnPropertyDescriptor(new Proxy(target, {
+ getOwnPropertyDescriptor: function (target, name) {
+ return {
+ value: 'baz',
+ writable: false,
+ configurable: false
+ };
+ }
+ }), 'foo');
+}, TypeError);