pkgs/test_descriptor/test/utils.dart

// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

import 'package:test/test.dart';

/// Converts a [Stream]`<List<int>>` to a flat byte future.
Future<List<int>> byteStreamToList(Stream<List<int>> stream) =>
    stream.fold(<int>[], (buffer, chunk) {
      buffer.addAll(chunk);
      return buffer;
    });

/// Returns a matcher that verifies that the result of calling `toString()`
/// matches [matcher].
Matcher toString(Object? matcher) => predicate(
      (object) {
        expect(object.toString(), matcher);
        return true;
      },
      'toString() matches $matcher',
    );