sousa-gecko/testing/web-platform/tests/IndexedDB/idbcursor_iterating.any.js

// META: global=window,worker
// META: title=IDBCursor.continue() - object store
// META: script=resources/support.js

'use strict';

async_test(t => {
  let db;
  let count = 0;

  let open_rq = createdb(t);
  open_rq.onupgradeneeded = function (e) {
    db = e.target.result;
    t.add_cleanup(function () { db.close(); indexedDB.deleteDatabase(db.name); });
    let objStore = db.createObjectStore("test", { keyPath: "key" });

    for (let i = 0; i < 500; i++)
      objStore.add({ key: i, val: "val_" + i });

    let rq = objStore.add({ key: 500, val: "val_500" });

    rq.onsuccess = t.step_func(function () {
      for (let i = 999; i > 500; i--)
        objStore.add({ key: i, val: "val_" + i });
    });

    objStore.createIndex('index', ['key', 'val']);
  };

  open_rq.onsuccess = function (e) {
    let cursor_rq = db.transaction("test", "readwrite")
      .objectStore("test")
      .openCursor();

    cursor_rq.onsuccess = t.step_func(function (e) {
      let cursor = e.target.result,
        store = e.target.source;
      if (!cursor) {
        assert_equals(count, 997, "cursor run count");

        let rq = e.target.source.count();
        rq.onsuccess = t.step_func(function (e) {
          assert_equals(e.target.result, 995, "object count");
          t.done();
        });
        return;
      }

      switch (cursor.key) {
        case 10:
          assert_equals(count, cursor.key, "count");
          store.delete(11);
          break;

        case 12:
        case 499:
        case 500:
        case 501:
          assert_equals(count, cursor.key - 1, "count");
          break;

        // Delete the next key
        case 510:
          store.delete(511);
          break;

        // Delete randomly
        case 512:
          store.delete(611);
          store.delete(499);
          store.delete(500);
          break;

        // Delete and add a new key
        case 520:
          store.delete(521);
          store.add({ key: 521, val: "new" });
          break;

        case 521:
          assert_equals(cursor.value.val, "new");
          break;

        // We should only be here once although we're basically making the index
        // "heavier" with its new key.
        case 530:
          assert_equals(cursor.value.val, "val_530");
          cursor.update({ key: 530, val: "val_531" })

          store.get(530).onsuccess = t.step_func(function (e) {
            assert_equals(e.target.result.val, "val_531");
          });
          break;

        // Shouldn't happen.
        case 11:
        case 511:
        case 611:
          assert_unreached(cursor.key + " should be deleted and never run");
          break;
      }

      cursor.continue();
      count++;
    });
  };
}, "Iterate and Delete elements");