entries-api/filesystementry-getParent.html

<!DOCTYPE html>
<meta charset=utf-8>
<title>Entries API: FileSystemEntry.getParent() with script-created DataTransfer</title>
<link rel=help href="https://wicg.github.io/entries-api/#dom-filesystementry-getparent">
<link rel=author title="Euclid Ye" href="mailto:yezhizhenjiakang@gmail.com">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>

<script>
async_test(t => {
  const file = new File(['hello world'], 'test.txt', { type: 'text/plain' });
  const dt = new DataTransfer();
  dt.items.add(file);

  const entry = dt.items[0].webkitGetAsEntry();

  entry.getParent(
    t.step_func_done(parent => {
      assert_true(parent.isDirectory);
      assert_false(parent.isFile);
      assert_equals(parent.name, '');
      assert_equals(parent.fullPath, '/');
    }),
    t.unreached_func('getParent() should not invoke the error callback')
  );
}, 'getParent() on a root-level file entry returns the root directory');

async_test(t => {
  const file = new File(['hello world'], 'test.txt', { type: 'text/plain' });
  const dt = new DataTransfer();
  dt.items.add(file);

  const entry = dt.items[0].webkitGetAsEntry();
  const root = entry.filesystem.root;

  root.getParent(
    t.step_func_done(parent => {
      assert_true(parent.isDirectory, 'parent should be a directory');
      assert_equals(parent.name, '', 'root name is empty string');
      assert_equals(parent.fullPath, '/', 'parent of root is root itself');
    }),
    t.unreached_func('getParent() should not invoke the error callback')
  );
}, 'getParent() on the root directory returns the root itself');
</script>