1 files changed, 57 insertions, 0 deletions
diff --git a/testing/web-platform/tests/webstorage/defineProperty.window.js b/testing/web-platform/tests/webstorage/defineProperty.window.js
new file mode 100644
index 0000000000..d8ab163df6
--- /dev/null
+++ b/testing/web-platform/tests/webstorage/defineProperty.window.js
@@ -0,0 +1,57 @@
+["localStorage", "sessionStorage"].forEach(function(name) {
+    [9, "x"].forEach(function(key) {
+        test(function() {
+            var desc = {
+                value: "value",
+            };
+
+            var storage = window[name];
+            storage.clear();
+
+            assert_equals(storage[key], undefined);
+            assert_equals(storage.getItem(key), null);
+            assert_equals(Object.defineProperty(storage, key, desc), storage);
+            assert_equals(storage[key], "value");
+            assert_equals(storage.getItem(key), "value");
+        }, "Defining data property for key " + key + " on " + name);
+
+        test(function() {
+            var desc1 = {
+                value: "value",
+            };
+            var desc2 = {
+                value: "new value",
+            };
+
+            var storage = window[name];
+            storage.clear();
+
+            assert_equals(storage[key], undefined);
+            assert_equals(storage.getItem(key), null);
+            assert_equals(Object.defineProperty(storage, key, desc1), storage);
+            assert_equals(storage[key], "value");
+            assert_equals(storage.getItem(key), "value");
+
+            assert_equals(Object.defineProperty(storage, key, desc2), storage);
+            assert_equals(storage[key], "new value");
+            assert_equals(storage.getItem(key), "new value");
+        }, "Defining data property for key " + key + " on " + name + " twice");
+
+        test(function() {
+            var desc = {
+                value: {
+                    toString: function() { return "value"; }
+                },
+            };
+
+            var storage = window[name];
+            storage.clear();
+
+            assert_equals(storage[key], undefined);
+            assert_equals(storage.getItem(key), null);
+            assert_equals(Object.defineProperty(storage, key, desc), storage);
+            assert_equals(storage[key], "value");
+            assert_equals(storage.getItem(key), "value");
+        }, "Defining data property with toString for key " + key + " on " + name);
+    });
+});