1 files changed, 125 insertions, 0 deletions
diff --git a/dom/indexedDB/test/unit/test_cursor_mutation.js b/dom/indexedDB/test/unit/test_cursor_mutation.js
new file mode 100644
index 0000000000..6af7df5c9b
--- /dev/null
+++ b/dom/indexedDB/test/unit/test_cursor_mutation.js
@@ -0,0 +1,125 @@
+/**
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+/* exported testGenerator */
+var testGenerator = testSteps();
+
+function* testSteps() {
+  const objectStoreData = [
+    // This one will be removed.
+    { ss: "237-23-7732", name: "Bob" },
+
+    // These will always be included.
+    { ss: "237-23-7733", name: "Ann" },
+    { ss: "237-23-7734", name: "Ron" },
+    { ss: "237-23-7735", name: "Sue" },
+    { ss: "237-23-7736", name: "Joe" },
+
+    // This one will be added.
+    { ss: "237-23-7737", name: "Pat" },
+  ];
+
+  // Post-add and post-remove data ordered by name.
+  const objectStoreDataNameSort = [1, 4, 5, 2, 3];
+
+  let request = indexedDB.open(
+    this.window ? window.location.pathname : "Splendid Test",
+    1
+  );
+  request.onerror = errorHandler;
+  request.onupgradeneeded = grabEventAndContinueHandler;
+  let event = yield undefined;
+
+  let db = event.target.result;
+  event.target.onsuccess = continueToNextStep;
+
+  let objectStore = db.createObjectStore("foo", { keyPath: "ss" });
+  objectStore.createIndex("name", "name", { unique: true });
+
+  for (let i = 0; i < objectStoreData.length - 1; i++) {
+    objectStore.add(objectStoreData[i]);
+  }
+  yield undefined;
+
+  let count = 0;
+
+  let sawAdded = false;
+  let sawRemoved = false;
+
+  db.transaction("foo").objectStore("foo").openCursor().onsuccess = function (
+    event
+  ) {
+    event.target.transaction.oncomplete = continueToNextStep;
+    let cursor = event.target.result;
+    if (cursor) {
+      if (cursor.value.name == objectStoreData[0].name) {
+        sawRemoved = true;
+      }
+      if (
+        cursor.value.name == objectStoreData[objectStoreData.length - 1].name
+      ) {
+        sawAdded = true;
+      }
+      cursor.continue();
+      count++;
+    }
+  };
+  yield undefined;
+
+  is(count, objectStoreData.length - 1, "Good initial count");
+  is(sawAdded, false, "Didn't see item that is about to be added");
+  is(sawRemoved, true, "Saw item that is about to be removed");
+
+  count = 0;
+  sawAdded = false;
+  sawRemoved = false;
+
+  db
+    .transaction("foo", "readwrite")
+    .objectStore("foo")
+    .index("name")
+    .openCursor().onsuccess = function (event) {
+    event.target.transaction.oncomplete = continueToNextStep;
+    let cursor = event.target.result;
+    if (cursor) {
+      if (cursor.value.name == objectStoreData[0].name) {
+        sawRemoved = true;
+      }
+      if (
+        cursor.value.name == objectStoreData[objectStoreData.length - 1].name
+      ) {
+        sawAdded = true;
+      }
+
+      is(
+        cursor.value.name,
+        objectStoreData[objectStoreDataNameSort[count++]].name,
+        "Correct name"
+      );
+
+      if (count == 1) {
+        let objectStore = event.target.transaction.objectStore("foo");
+        objectStore.delete(objectStoreData[0].ss).onsuccess = function (event) {
+          objectStore.add(
+            objectStoreData[objectStoreData.length - 1]
+          ).onsuccess = function (event) {
+            cursor.continue();
+          };
+        };
+      } else {
+        cursor.continue();
+      }
+    }
+  };
+  yield undefined;
+
+  is(count, objectStoreData.length - 1, "Good final count");
+  is(sawAdded, true, "Saw item that was added");
+  is(sawRemoved, false, "Didn't see item that was removed");
+
+  finishTest();
+
+  objectStore = null; // Bug 943409 workaround.
+}