1 files changed, 22 insertions, 0 deletions
diff --git a/testing/web-platform/tests/webstorage/storage_in.window.js b/testing/web-platform/tests/webstorage/storage_in.window.js
new file mode 100644
index 0000000000..148285a1eb
--- /dev/null
+++ b/testing/web-platform/tests/webstorage/storage_in.window.js
@@ -0,0 +1,22 @@
+["localStorage", "sessionStorage"].forEach(function(name) {
+    test(function() {
+        var storage = window[name];
+        storage.clear();
+
+        assert_false("name" in storage);
+        storage["name"] = "user1";
+        assert_true("name" in storage);
+    }, "The in operator in " + name + ": property access");
+
+    test(function() {
+        var storage = window[name];
+        storage.clear();
+
+        assert_false("name" in storage);
+        storage.setItem("name", "user1");
+        assert_true("name" in storage);
+        assert_equals(storage.name, "user1");
+        storage.removeItem("name");
+        assert_false("name" in storage);
+    }, "The in operator in " + name + ": method access");
+});