blob: 6a57c3176d3ab539555f025b7eba6ef81f1a2297 [file] [log] [blame]
// Copyright (c) 2016, 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 'dart:async';
import 'dart:convert';
import 'dart:developer';
import 'dart:io';
import 'dart:isolate';
import 'package:async/async.dart';
import 'package:coverage/coverage.dart';
import 'package:path/path.dart' as p;
import 'package:stream_channel/isolate_channel.dart';
import 'package:stream_channel/stream_channel.dart';
import 'package:test_api/backend.dart';
import 'package:vm_service/vm_service.dart' hide Isolate;
import 'package:vm_service/vm_service_io.dart';
import '../../runner/configuration.dart';
import '../../runner/environment.dart';
import '../../runner/load_exception.dart';
import '../../runner/platform.dart';
import '../../runner/plugin/platform_helpers.dart';
import '../../runner/plugin/shared_platform_helpers.dart';
import '../../runner/runner_suite.dart';
import '../../runner/suite.dart';
import '../../util/io.dart';
import '../../util/package_config.dart';
import '../package_version.dart';
import 'environment.dart';
import 'test_compiler.dart';
var _shouldPauseAfterTests = false;
/// A platform that loads tests in isolates spawned within this Dart process.
class VMPlatform extends PlatformPlugin {
/// The test runner configuration.
final _config = Configuration.current;
final _compiler = TestCompiler(
p.join(p.current, '.dart_tool', 'test', 'incremental_kernel'));
final _closeMemo = AsyncMemoizer<void>();
final _workingDirectory = Directory.current.uri;
final _tempDir = Directory.systemTemp.createTempSync('dart_test.vm.');
Future<RunnerSuite?> load(String path, SuitePlatform platform,
SuiteConfiguration suiteConfig, Map<String, Object?> message) async {
assert(platform.runtime == Runtime.vm);
MultiChannel outerChannel;
var cleanupCallbacks = <void Function()>[];
Isolate? isolate;
if (platform.compiler == Compiler.exe) {
var serverSocket = await ServerSocket.bind('localhost', 0);
Process process;
try {
process =
await _spawnExecutable(path, suiteConfig.metadata, serverSocket);
} catch (error) {
var socket = await serverSocket.first;
outerChannel = MultiChannel<Object?>(jsonSocketStreamChannel(socket));
} else {
var receivePort = ReceivePort();
try {
isolate = await _spawnIsolate(path, receivePort.sendPort,
suiteConfig.metadata, platform.compiler);
if (isolate == null) return null;
} catch (error) {
outerChannel = MultiChannel(IsolateChannel.connectReceive(receivePort));
VmService? client;
StreamSubscription<Event>? eventSub;
// Typical test interaction will go across `channel`, `outerChannel` adds
// additional communication directly between the test bootstrapping and this
// platform to enable pausing after tests for debugging.
var outerQueue = StreamQueue(;
var channelId = (await as int;
var channel = outerChannel.virtualChannel(channelId).transformStream(
StreamTransformer.fromHandlers(handleDone: (sink) async {
if (_shouldPauseAfterTests) {
for (var fn in cleanupCallbacks) {
Environment? environment;
IsolateRef? isolateRef;
if (_config.debug) {
if (platform.compiler == Compiler.exe) {
throw UnsupportedError(
'Unable to debug tests compiled to `exe` (tried to debug $path with '
'the `exe` compiler).');
var info =
await Service.controlWebServer(enable: true, silenceOutput: true);
// ignore: deprecated_member_use, Remove when SDK constraint is at 3.2.0
var isolateID = Service.getIsolateID(isolate!)!;
var libraryPath = _absolute(path).toString();
var serverUri = info.serverUri!;
client = await vmServiceConnectUri(_wsUriFor(serverUri).toString());
var isolateNumber = int.parse(isolateID.split('/').last);
isolateRef = (await client.getVM())
.firstWhere((isolate) => isolate.number == isolateNumber.toString());
await client.setName(!, path);
var libraryRef = (await client.getIsolate(!))
.firstWhere((library) => library.uri == libraryPath);
var url = _observatoryUrlFor(serverUri,!,!);
environment = VMEnvironment(url, isolateRef, client);
environment ??= const PluginEnvironment();
var controller = deserializeSuite(
path, platform, suiteConfig, environment, channel.cast(), message,
gatherCoverage: () => _gatherCoverage(environment!));
if (isolateRef != null) {
await client!.streamListen('Debug');
eventSub = client.onDebugEvent.listen((event) {
if (event.kind == EventKind.kResume) {
} else if (event.kind == EventKind.kPauseInterrupted ||
event.kind == EventKind.kPauseBreakpoint ||
event.kind == EventKind.kPauseException) {
return await controller.suite;
Future close() => _closeMemo.runOnce(() => Future.wait([
Uri _absolute(String path) {
final uri = p.toUri(path);
if (uri.isAbsolute) return uri;
return _workingDirectory.resolveUri(uri);
/// Compiles [path] to a native executable and spawns it as a process.
/// Sets up a communication channel as well by passing command line arguments
/// for the host and port of [socket].
Future<Process> _spawnExecutable(
String path, Metadata suiteMetadata, ServerSocket socket) async {
if (_config.suiteDefaults.precompiledPath != null) {
throw UnsupportedError(
'Precompiled native executable tests are not supported at this time');
var executable = await _compileToNative(path, suiteMetadata);
return await Process.start(
executable, [, socket.port.toString()]);
/// Compiles [path] to a native executable using `dart compile exe`.
Future<String> _compileToNative(String path, Metadata suiteMetadata) async {
var bootstrapPath = _bootstrapNativeTestFile(
suiteMetadata.languageVersionComment ??
await rootPackageLanguageVersionComment);
var output = File(p.setExtension(bootstrapPath, '.exe'));
var processResult = await, [
(await packageConfigUri).toFilePath(),
if (processResult.exitCode != 0 || !(await output.exists())) {
throw LoadException(path, '''
exitCode: ${processResult.exitCode}
stdout: ${processResult.stdout}
stderr: ${processResult.stderr}''');
return output.path;
/// Spawns an isolate with the current configuration and passes it [message].
/// This isolate connects an [IsolateChannel] to [message] and sends the
/// serialized tests over that channel.
/// Returns `null` if an exception occurs but [close] has already been called.
Future<Isolate?> _spawnIsolate(String path, SendPort message,
Metadata suiteMetadata, Compiler compiler) async {
try {
var precompiledPath = _config.suiteDefaults.precompiledPath;
if (precompiledPath != null) {
return _spawnPrecompiledIsolate(
path, message, precompiledPath, compiler);
} else if (_config.pubServeUrl != null) {
return _spawnPubServeIsolate(
path, message, _config.pubServeUrl!, compiler);
return switch (compiler) {
Compiler.kernel => _spawnIsolateWithUri(
await _compileToKernel(path, suiteMetadata), message),
Compiler.source => _spawnIsolateWithUri(
suiteMetadata.languageVersionComment ??
await rootPackageLanguageVersionComment),
_ => throw StateError(
'Unsupported compiler $compiler for the VM platform'),
} catch (_) {
if (_closeMemo.hasRun) return null;
/// Compiles [path] to kernel and returns the uri to the compiled dill.
Future<Uri> _compileToKernel(String path, Metadata suiteMetadata) async {
final response = await _compiler.compile(_absolute(path), suiteMetadata);
var compiledDill = response.kernelOutputUri?.toFilePath();
if (compiledDill == null || response.errorCount > 0) {
throw LoadException(path, response.compilerOutput ?? 'unknown error');
return _absolute(compiledDill);
/// Runs [uri] in an isolate, passing [message].
Future<Isolate> _spawnIsolateWithUri(Uri uri, SendPort message) async {
return await Isolate.spawnUri(uri, [], message,
packageConfig: await packageConfigUri, checked: true);
Future<Isolate> _spawnPrecompiledIsolate(String testPath, SendPort message,
String precompiledPath, Compiler compiler) async {
testPath = _absolute('${p.join(precompiledPath, testPath)}.vm_test.dart')
switch (compiler) {
case Compiler.kernel:
var dillTestpath =
'${testPath.substring(0, testPath.length - '.dart'.length)}'
if (await File(dillTestpath).exists()) {
testPath = dillTestpath;
// TODO: Compile to kernel manually here? Otherwise we aren't compiling
// with kernel when we technically should be, based on the compiler
// setting.
case Compiler.source:
// Just leave test path as is.
throw StateError('Unsupported compiler for the VM platform $compiler.');
File? packageConfig =
File(p.join(precompiledPath, '.dart_tool/package_config.json'));
if (!(await packageConfig.exists())) {
packageConfig = File(p.join(precompiledPath, '.packages'));
if (!(await packageConfig.exists())) {
packageConfig = null;
return await Isolate.spawnUri(p.toUri(testPath), [], message,
packageConfig: packageConfig?.uri, checked: true);
/// Bootstraps the test at [testPath] and writes its contents to a temporary
/// file.
/// Returns the [Uri] to the created file.
Uri _bootstrapIsolateTestFile(
String testPath, String languageVersionComment) {
var file = File(p.join(
_tempDir.path, p.setExtension(testPath, '.bootstrap.isolate.dart')));
if (!file.existsSync()) {
..createSync(recursive: true)
_absolute(testPath), languageVersionComment));
return file.uri;
/// Bootstraps the test at [testPath] for native execution and writes its
/// contents to a temporary file.
/// Returns the path to the created file.
String _bootstrapNativeTestFile(
String testPath, String languageVersionComment) {
var file = File(p.join(
_tempDir.path, p.setExtension(testPath, '.bootstrap.native.dart')));
if (!file.existsSync()) {
..createSync(recursive: true)
_absolute(testPath), languageVersionComment));
return file.path;
/// Creates bootstrap file contents for running [testUri] in a VM isolate.
String _bootstrapIsolateTestContents(
Uri testUri, String languageVersionComment) =>
import "dart:isolate";
import "package:test_core/src/bootstrap/vm.dart";
import "$testUri" as test;
void main(_, SendPort sendPort) {
internalBootstrapVmTest(() => test.main, sendPort);
/// Creates bootstrap file contents for running [testUri] as a native
/// executable.
String _bootstrapNativeTestContents(
Uri testUri, String languageVersionComment) =>
import "dart:isolate";
import "package:test_core/src/bootstrap/vm.dart";
import "$testUri" as test;
void main(List<String> args) {
internalBootstrapNativeTest(() => test.main, args);
Future<Map<String, dynamic>> _gatherCoverage(Environment environment) async {
final isolateId = Uri.parse(environment.observatoryUrl!.fragment)
return await collect(environment.observatoryUrl!, false, false, false, {},
isolateIds: {isolateId!});
Future<Isolate> _spawnPubServeIsolate(String testPath, SendPort message,
Uri pubServeUrl, Compiler compiler) async {
if (compiler != Compiler.source) {
throw ArgumentError(
'The --pub-serve option requires the `--compiler none` option but the '
'compiler was $compiler');
var url = pubServeUrl.resolveUri(
p.toUri('${p.relative(testPath, from: 'test')}.vm_test.dart'));
try {
return await Isolate.spawnUri(url, [], message, checked: true);
} on IsolateSpawnException catch (error) {
if (error.message.contains('OS Error: Connection refused') ||
error.message.contains('The remote computer refused')) {
throw LoadException(
'Error getting $url: Connection refused\n'
'Make sure "pub serve" is running.');
} else if (error.message.contains('404 Not Found')) {
throw LoadException(
'Error getting $url: 404 Not Found\n'
'Make sure "pub serve" is serving the test/ directory.');
throw LoadException(testPath, error);
Uri _wsUriFor(Uri observatoryUrl) =>
observatoryUrl.replace(scheme: 'ws').resolve('ws');
Uri _observatoryUrlFor(Uri base, String isolateId, String id) => base.replace(
fragment: Uri(
path: '/inspect',
queryParameters: {'isolateId': isolateId, 'objectId': id}).toString());
var _hasRegistered = false;
void _setupPauseAfterTests() {
if (_hasRegistered) return;
_hasRegistered = true;
registerExtension('ext.test.pauseAfterTests', (_, __) async {
_shouldPauseAfterTests = true;
return ServiceExtensionResponse.result(jsonEncode({}));