1 files changed, 70 insertions, 0 deletions
diff --git a/devtools/client/storage/test/browser_storage_dynamic_updates_localStorage.js b/devtools/client/storage/test/browser_storage_dynamic_updates_localStorage.js
new file mode 100644
index 0000000000..f220d16b0c
--- /dev/null
+++ b/devtools/client/storage/test/browser_storage_dynamic_updates_localStorage.js
@@ -0,0 +1,70 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+// Test dynamic updates in the storage inspector for localStorage.
+
+add_task(async function () {
+  const TEST_HOST = "https://test1.example.org";
+
+  await openTabAndSetupStorage(MAIN_DOMAIN_SECURED + "storage-updates.html");
+
+  gUI.tree.expandAll();
+
+  ok(gUI.sidebar.hidden, "Sidebar is initially hidden");
+
+  const expectedKeys = ["1", "2", "3", "4", "5", "null", "non-json-parsable"];
+
+  // Test on string keys that JSON.parse can parse without throwing
+  // (to verify the issue fixed by Bug 1578447 doesn't regress).
+  await testRemoveAndChange("null", expectedKeys, TEST_HOST);
+  await testRemoveAndChange("4", expectedKeys, TEST_HOST);
+  // Test on a string that makes JSON.parse to throw.
+  await testRemoveAndChange("non-json-parsable", expectedKeys, TEST_HOST);
+
+  // Clearing items.
+  await SpecialPowers.spawn(gBrowser.selectedBrowser, [], function () {
+    content.wrappedJSObject.clear();
+  });
+
+  await gUI.once("store-objects-cleared");
+
+  await checkState([[["localStorage", TEST_HOST], []]]);
+});
+
+async function testRemoveAndChange(targetKey, expectedKeys, host) {
+  await checkState([[["localStorage", host], expectedKeys]]);
+
+  await removeLocalStorageItem(targetKey);
+  await gUI.once("store-objects-edit");
+  await checkState([
+    [["localStorage", host], expectedKeys.filter(key => key !== targetKey)],
+  ]);
+
+  await setLocalStorageItem(targetKey, "again");
+  await gUI.once("store-objects-edit");
+  await checkState([[["localStorage", host], expectedKeys]]);
+
+  // Updating a row set to the string "null"
+  await setLocalStorageItem(targetKey, `key-${targetKey}-changed`);
+  await gUI.once("store-objects-edit");
+  checkCell(targetKey, "value", `key-${targetKey}-changed`);
+}
+
+async function setLocalStorageItem(key, value) {
+  await SpecialPowers.spawn(
+    gBrowser.selectedBrowser,
+    [[key, value]],
+    ([innerKey, innerValue]) => {
+      content.wrappedJSObject.localStorage.setItem(innerKey, innerValue);
+    }
+  );
+}
+
+async function removeLocalStorageItem(key) {
+  await SpecialPowers.spawn(gBrowser.selectedBrowser, [key], innerKey => {
+    content.wrappedJSObject.localStorage.removeItem(innerKey);
+  });
+}