Import web-platform-tests/webstorage

LayoutTests/imported/web-platform-tests/webstorage/event_basic.js

+testStorages(function(storageString) {
+    async_test(function(t) {
+        assert_true(storageString in window, storageString + " exist");
+        var storage = window[storageString];
+        t.add_cleanup(function() { storage.clear() });
+
+        storageEventList = new Array();
+        storage.clear();
+        assert_equals(storage.length, 0, "storage.length");
+
+        runAfterNStorageEvents(t.step_func(step1), 0);
+
+        function step1(msg)
+        {
+            storageEventList = new Array();
+            storage.setItem('FOO', 'BAR');
+
+            runAfterNStorageEvents(t.step_func(step2), 1);
+        }
+
+        function step2(msg)
+        {
+            if(msg != undefined) {
+                assert_unreached(msg);
+            }
+            assert_equals(storageEventList.length, 1);
+            assert_equals(storageEventList[0].key, "FOO");
+            assert_equals(storageEventList[0].oldValue, null);
+            assert_equals(storageEventList[0].newValue, "BAR");
+
+            storage.setItem('FU', 'BAR');
+            storage.setItem('a', '1');
+            storage.setItem('b', '2');
+            storage.setItem('b', '3');
+
+            runAfterNStorageEvents(t.step_func(step3), 5);
+        }
+
+        function step3(msg)
+        {
+            if(msg != undefined) {
+                assert_unreached(msg);
+            }
+            assert_equals(storageEventList.length, 5);
+            assert_equals(storageEventList[1].key, "FU");
+            assert_equals(storageEventList[1].oldValue, null);
+            assert_equals(storageEventList[1].newValue, "BAR");
+
+            assert_equals(storageEventList[2].key, "a");
+            assert_equals(storageEventList[2].oldValue, null);
+            assert_equals(storageEventList[2].newValue, "1");
+
+            assert_equals(storageEventList[3].key, "b");
+            assert_equals(storageEventList[3].oldValue, null);
+            assert_equals(storageEventList[3].newValue, "2");
+
+            assert_equals(storageEventList[4].key, "b");
+            assert_equals(storageEventList[4].oldValue, "2");
+            assert_equals(storageEventList[4].newValue, "3");
+
+            storage.removeItem('FOO');
+
+            runAfterNStorageEvents(t.step_func(step4), 6);
+        }
+
+        function step4(msg)
+        {
+            if(msg != undefined) {
+                assert_unreached(msg);
+            }
+            assert_equals(storageEventList.length, 6);
+            assert_equals(storageEventList[5].key, "FOO");
+            assert_equals(storageEventList[5].oldValue, "BAR");
+            assert_equals(storageEventList[5].newValue, null);
+
+            storage.removeItem('FU');
+
+            runAfterNStorageEvents(t.step_func(step5), 7);
+        }
+
+        function step5(msg)
+        {
+            if(msg != undefined) {
+                assert_unreached(msg);
+            }
+            assert_equals(storageEventList.length, 7);
+            assert_equals(storageEventList[6].key, "FU");
+            assert_equals(storageEventList[6].oldValue, "BAR");
+            assert_equals(storageEventList[6].newValue, null);
+
+            storage.clear();
+
+            runAfterNStorageEvents(t.step_func(step6), 8);
+        }
+
+        function step6(msg)
+        {
+            if(msg != undefined) {
+                assert_unreached(msg);
+            }
+            assert_equals(storageEventList.length, 8);
+            assert_equals(storageEventList[7].key, null);
+            assert_equals(storageEventList[7].oldValue, null);
+            assert_equals(storageEventList[7].newValue, null);
+
+            t.done();
+        }
+
+    }, storageString + " mutations fire StorageEvents that are caught by the event listener set via window.onstorage.");
+});