// Copyright 2014 The Flutter Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. import 'dart:async'; import 'package:flutter_tools/src/build_system/build_system.dart'; class TestBuildSystem implements BuildSystem { /// Create a [BuildSystem] instance that returns the provided results in order. TestBuildSystem.list(this._results, [this._onRun]) : _exception = null, _singleResult = null; /// Create a [BuildSystem] instance that returns the provided result for every build /// and buildIncremental request. TestBuildSystem.all(this._singleResult, [this._onRun]) : _exception = null, _results = <BuildResult>[]; /// Create a [BuildSystem] instance that always throws the provided error for every build /// and buildIncremental request. TestBuildSystem.error(this._exception) : _singleResult = null, _results = <BuildResult>[], _onRun = null; final List<BuildResult> _results; final BuildResult? _singleResult; final Exception? _exception; final void Function(Target target, Environment environment)? _onRun; int _nextResult = 0; @override Future<BuildResult> build(Target target, Environment environment, {BuildSystemConfig buildSystemConfig = const BuildSystemConfig()}) async { if (_onRun != null) { _onRun?.call(target, environment); } if (_exception != null) { throw _exception!; } if (_singleResult != null) { return _singleResult!; } if (_nextResult >= _results.length) { throw StateError('Unexpected build request of ${target.name}'); } return _results[_nextResult++]; } @override Future<BuildResult> buildIncremental(Target target, Environment environment, BuildResult? previousBuild) async { if (_onRun != null) { _onRun?.call(target, environment); } if (_exception != null) { throw _exception!; } if (_singleResult != null) { return _singleResult!; } if (_nextResult >= _results.length) { throw StateError('Unexpected buildIncremental request of ${target.name}'); } return _results[_nextResult++]; } }