1 files changed, 66 insertions, 0 deletions
diff --git a/testing/web-platform/tests/IndexedDB/idbindex_tombstones.any.js b/testing/web-platform/tests/IndexedDB/idbindex_tombstones.any.js
new file mode 100644
index 0000000000..7a2dcc9cb1
--- /dev/null
+++ b/testing/web-platform/tests/IndexedDB/idbindex_tombstones.any.js
@@ -0,0 +1,66 @@
+// META: title=Index Tombstones
+// META: script=resources/support-promises.js
+
+// This test is used to trigger a special case in Chrome with how it deals with
+// index creation & modification. This had caused issues before.
+// See https://crbug.com/1033996
+
+async function iterateAndReturnAllCursorResult(testCase, cursorRequest) {
+  return new Promise((resolve, reject) => {
+    let results = [];
+    cursorRequest.onsuccess = testCase.step_func(function(event) {
+      const cursor = event.target.result;
+      if (!cursor) {
+        resolve(results);
+        return;
+      }
+      results.push(cursor.value);
+      cursor.continue();
+    });
+    cursorRequest.onerror = reject;
+  });
+}
+
+async function createTombstones(testCase, db) {
+  const txn1 = db.transaction(['objectStore'], 'readwrite');
+  txn1.objectStore('objectStore').add({key: 'firstItem', indexedOn: 1});
+  txn1.objectStore('objectStore').add({key: 'secondItem', indexedOn: 2});
+  txn1.objectStore('objectStore').add({key: 'thirdItem', indexedOn: 3});
+  const txn2 = db.transaction(['objectStore'], 'readwrite');
+  txn2.objectStore('objectStore').put({key: 'firstItem', indexedOn: -10});
+  txn2.objectStore('objectStore').put({key: 'secondItem', indexedOn: 4});
+  txn2.objectStore('objectStore').put({key: 'thirdItem', indexedOn: 10});
+  await promiseForTransaction(testCase, txn1);
+  await promiseForTransaction(testCase, txn2);
+}
+
+async function run_test(testCase, transactionMode, direction) {
+  const db = await createDatabase(testCase, db => {
+    db.createObjectStore('objectStore', {keyPath: 'key'})
+        .createIndex('index', 'indexedOn');
+  });
+  await createTombstones(testCase, db);
+
+  const txn = db.transaction(['objectStore'], transactionMode);
+  cursor = txn.objectStore('objectStore').index('index').openCursor(
+      IDBKeyRange.bound(-11, 11), direction);
+  let results = await iterateAndReturnAllCursorResult(testCase, cursor);
+  assert_equals(results.length, 3);
+  db.close();
+}
+
+promise_test(async testCase => {
+  await run_test(testCase, 'readonly', 'next');
+}, 'Forward iteration over an index in a readonly transaction');
+
+promise_test(async testCase => {
+  await run_test(testCase, 'readonly', 'prev');
+}, 'Backward iteration over an index in a readonly transaction');
+
+promise_test(async testCase => {
+  await run_test(testCase, 'readwrite', 'next');
+}, 'Forward iteration over an index in a readwrite transaction');
+
+promise_test(async testCase => {
+  await run_test(testCase, 'readwrite', 'prev');
+}, 'Backward iteration over an index in a readwrite transaction');