1 files changed, 81 insertions, 0 deletions
diff --git a/testing/web-platform/tests/webstorage/symbol-props.window.js b/testing/web-platform/tests/webstorage/symbol-props.window.js
new file mode 100644
index 0000000000..61dd8f83dc
--- /dev/null
+++ b/testing/web-platform/tests/webstorage/symbol-props.window.js
@@ -0,0 +1,81 @@
+["localStorage", "sessionStorage"].forEach(function(name) {
+    test(function() {
+        var key = Symbol();
+
+        var storage = window[name];
+        storage.clear();
+
+        storage[key] = "test";
+        assert_equals(storage[key], "test");
+    }, name + ": plain set + get (loose)");
+
+    test(function() {
+        "use strict";
+        var key = Symbol();
+
+        var storage = window[name];
+        storage.clear();
+
+        storage[key] = "test";
+        assert_equals(storage[key], "test");
+    }, name + ": plain set + get (strict)");
+
+    test(function() {
+        var key = Symbol();
+
+        var storage = window[name];
+        storage.clear();
+
+        Object.defineProperty(storage, key, { "value": "test" });
+        assert_equals(storage[key], "test");
+    }, name + ": defineProperty + get");
+
+    test(function() {
+        var key = Symbol();
+
+        var storage = window[name];
+        storage.clear();
+
+        Object.defineProperty(storage, key, { "value": "test", "configurable": false });
+        assert_equals(storage[key], "test");
+        var desc = Object.getOwnPropertyDescriptor(storage, key);
+        assert_true(desc.configurable, "configurable");
+
+        assert_true(delete storage[key]);
+        assert_equals(storage[key], undefined);
+    }, name + ": defineProperty not configurable");
+
+    test(function() {
+        var key = Symbol();
+        Storage.prototype[key] = "test";
+        this.add_cleanup(function() { delete Storage.prototype[key]; });
+
+        var storage = window[name];
+        storage.clear();
+
+        assert_equals(storage[key], "test");
+        var desc = Object.getOwnPropertyDescriptor(storage, key);
+        assert_equals(desc, undefined);
+    }, name + ": get with symbol on prototype");
+
+    test(function() {
+        var key = Symbol();
+
+        var storage = window[name];
+        storage.clear();
+
+        storage[key] = "test";
+        assert_true(delete storage[key]);
+        assert_equals(storage[key], undefined);
+    }, name + ": delete existing property");
+
+    test(function() {
+        var key = Symbol();
+
+        var storage = window[name];
+        storage.clear();
+
+        assert_true(delete storage[key]);
+        assert_equals(storage[key], undefined);
+    }, name + ": delete non-existent property");
+});