IndexedDB/clone-before-keypath-eval.html

<!doctype html>
<meta charset=utf-8>
<title>IndexedDB: </title>
<meta name="help" href="https://w3c.github.io/IndexedDB/#dom-idbobjectstore-put">
<meta name="help" href="https://w3c.github.io/IndexedDB/#dom-idbcursor-update">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support.js"></script>
<script>

function ProbeObject() {
  this.id_count = 0;
  this.invalid_id_count = 0;
  this.prop_count = 0;
  Object.defineProperties(this, {
    id: {
      enumerable: true,
      get() {
        ++this.id_count;
        return 1000 + this.id_count;
      },
    },
    invalid_id: {
      enumerable: true,
      get() {
        ++this.invalid_id_count;
        return {};
      },
    },
    prop: {
      enumerable: true,
      get() {
        ++this.prop_count;
        return 2000 + this.prop_count;
      },
    },
  });
}

indexeddb_test(
  (t, db) => {
    db.createObjectStore('store', {keyPath: 'id', autoIncrement: true});
  },
  (t, db) => {
    const tx = db.transaction('store', 'readwrite');
    const store = tx.objectStore('store');
    const obj = new ProbeObject();
    store.put(obj);
    assert_equals(
        obj.id_count, 1,
        'put() operation should access primary key property once');
    assert_equals(
        obj.prop_count, 1,
        'put() operation should access other properties once');
    t.done();
  }, 'Key generator and key path validity check operates on a clone');

indexeddb_test(
  (t, db) => {
    db.createObjectStore('store', {keyPath: 'invalid_id', autoIncrement: true});
  },
  (t, db) => {
    const tx = db.transaction('store', 'readwrite');
    const store = tx.objectStore('store');
    const obj = new ProbeObject();
    assert_throws_dom('DataError', () => { store.put(obj); },
                      'put() should throw if primary key cannot be injected');
    assert_equals(
        obj.invalid_id_count, 1,
        'put() operation should access primary key property once');
    assert_equals(
        obj.prop_count, 1,
        'put() operation should access other properties once');
    t.done();
  }, 'Failing key path validity check operates on a clone');

indexeddb_test(
  (t, db) => {
    const store = db.createObjectStore('store');
    store.createIndex('index', 'prop');
  },
  (t, db) => {
    const tx = db.transaction('store', 'readwrite');
    const store = tx.objectStore('store');
    const obj = new ProbeObject();
    store.put(obj, 'key');
    assert_equals(
        obj.prop_count, 1, 'put() should access index key property once');
    assert_equals(
        obj.id_count, 1,
        'put() operation should access other properties once');
    t.done();
  }, 'Index key path evaluations operate on a clone');

indexeddb_test(
  (t, db) => {
    const store = db.createObjectStore('store', {keyPath: 'id'});
    store.createIndex('index', 'prop');
  },
  (t, db) => {
    const tx = db.transaction('store', 'readwrite');
    const store = tx.objectStore('store');
    const obj = new ProbeObject();
    store.put(obj);
    assert_equals(
        obj.id_count, 1, 'put() should access primary key property once');
    assert_equals(
        obj.prop_count, 1, 'put() should access index key property once');
    t.done();
  }, 'Store and index key path evaluations operate on the same clone');

indexeddb_test(
  (t, db) => {
    const store = db.createObjectStore('store', {keyPath: 'id'});
    store.createIndex('index', 'prop');
  },
  (t, db) => {
    const tx = db.transaction('store', 'readwrite');
    const store = tx.objectStore('store');
    store.put(new ProbeObject());

    store.openCursor().onsuccess = t.step_func((event) => {
      const cursor = event.target.result;

      const obj = new ProbeObject();
      cursor.update(obj);
      assert_equals(
          obj.id_count, 1, 'put() should access primary key property once');
      assert_equals(
          obj.prop_count, 1, 'put() should access index key property once');

      t.done();
    });
  }, 'Cursor update checks and keypath evaluations operate on a clone');
</script>