<!DOCTYPE html>
<meta charset=utf-8>
<title>Entries API: FileSystemDirectoryReader manual test</title>
<link rel=help href="https://wicg.github.io/entries-api/#api-directoryreader">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support.js"></script>

<script>
entry_test((t, entry) => {
  const reader = entry.createReader();

  assert_idl_attribute(reader, 'readEntries', 'FileSystemDirectoryReader has readEntries');
  assert_equals(typeof reader.readEntries, 'function', 'readEntries() is a method');

  t.done();
}, 'FileSystemDirectoryReader - interface');


entry_test((t, entry) => {
  getChildEntry(entry, 'subdir', t.step_func(dir => {
    const reader = dir.createReader();
    assert_equals(typeof reader.readEntries, 'function');

    const found_names = [];
    const do_chunk = t.step_func(() =>
      reader.readEntries(t.step_func(entries => {

        if (entries.length > 0) {
          entries.forEach(t.step_func(entry => found_names.push(entry.name)));
          do_chunk();
          return;
        }

        found_names.sort();
        assert_array_equals(found_names, ['1.txt', '2.txt', '3.txt'],
                            'directory contents should match');
        t.done();
      })));

    do_chunk();
  }), t.unreached_func('A child entry should be found'));
}, 'FileSystemDirectoryReader - basic enumeration');

entry_test((t, entry) => {
  const reader = entry.createReader();
  reader.readEntries(() => {}, t.unreached_func('readEntries should succeed'));
  reader.readEntries(
    t.unreached_func('readEntries() should fail if already reading'),
    t.step_func(error => {
      assert_equals(error.name, 'InvalidStateError', 'invalid state if already reading');
      t.done();
    }));
}, 'FileSystemDirectoryReader - reading flag');

entry_test((t, entry) => {
  const reader = entry.createReader();

  const do_chunk = t.step_func(() =>
    reader.readEntries(t.step_func(entries => {
      if (entries.length > 0) {
        do_chunk();
        return;
      }
      reader.readEntries(t.step_func(entries => {
        assert_equals(
          entries.length, 0,
          'calling readEntries() when done should yield and empty sequence');
        t.done();
      }));
    })));

  do_chunk();
}, 'FileSystemDirectoryReader - done flag');

// TODO: Manual tests where directory contents are changed during the test.
</script>