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