Move a bunch of src/ files into subdirectories.

lib/src/remote_exception.dart

-// Copyright (c) 2015, 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.
-
-library unittest.remote_exception;
-
-import 'dart:async';
-import 'dart:isolate';
-
-import 'package:stack_trace/stack_trace.dart';
-
-import 'expect.dart';
-
-/// An exception that was thrown remotely.
-///
-/// This could be an exception thrown in a different isolate, a different
-/// process, or on an entirely different computer.
-class RemoteException implements Exception {
-  /// The original exception's message, if it had one.
-  ///
-  /// If the original exception was a plain string, this will contain that
-  /// string.
-  final String message;
-
-  /// The value of the original exception's `runtimeType.toString()`.
-  final String type;
-
-  /// The value of the original exception's `toString()`.
-  final String _toString;
-
-  /// Serializes [error] and [stackTrace] into a JSON-safe object.
-  ///
-  /// Other than JSON- and isolate-safety, no guarantees are made about the
-  /// serialized format.
-  static serialize(error, StackTrace stackTrace) {
-    var message;
-    if (error is String) {
-      message = error;
-    } else {
-      try {
-        message = error.message.toString();
-      } on NoSuchMethodError catch (_) {
-        // Do nothing.
-      }
-    }
-
-    // It's possible (although unlikely) for a user-defined class to have
-    // multiple of these supertypes. That's fine, though, since we only care
-    // about core-library-raised IsolateSpawnExceptions anyway.
-    var supertype;
-    if (error is TestFailure) {
-      supertype = 'TestFailure';
-    } else if (error is IsolateSpawnException) {
-      supertype = 'IsolateSpawnException';
-    }
-
-    return {
-      'message': message,
-      'type': error.runtimeType.toString(),
-      'supertype': supertype,
-      'toString': error.toString(),
-      'stackChain': new Chain.forTrace(stackTrace).toString()
-    };
-  }
-
-  /// Deserializes an exception serialized with [RemoteException.serialize].
-  ///
-  /// The returned [AsyncError] is guaranteed to have a [RemoteException] as its
-  /// error and a [Chain] as its stack trace.
-  static AsyncError deserialize(serialized) {
-    return new AsyncError(
-        _deserializeException(serialized),
-        new Chain.parse(serialized['stackChain']));
-  }
-
-  /// Deserializes the exception portion of [serialized].
-  static RemoteException _deserializeException(serialized) {
-    var message = serialized['message'];
-    var type = serialized['type'];
-    var toString = serialized['toString'];
-
-    switch (serialized['supertype']) {
-      case 'TestFailure':
-        return new _RemoteTestFailure(message, type, toString);
-      case 'IsolateSpawnException':
-        return new _RemoteIsolateSpawnException(message, type, toString);
-      default:
-        return new RemoteException._(message, type, toString);
-    }
-  }
-
-  RemoteException._(this.message, this.type, this._toString);
-
-  String toString() => _toString;
-}
-
-/// A subclass of [RemoteException] that implements [TestFailure].
-///
-/// It's important to preserve [TestFailure]-ness, because tests have different
-/// results depending on whether an exception was a failure or an error.
-class _RemoteTestFailure extends RemoteException implements TestFailure {
-  _RemoteTestFailure(String message, String type, String toString)
-      : super._(message, type, toString);
-}
-
-/// A subclass of [RemoteException] that implements [IsolateSpawnException].
-class _RemoteIsolateSpawnException extends RemoteException
-    implements IsolateSpawnException {
-  _RemoteIsolateSpawnException(String message, String type, String toString)
-      : super._(message, type, toString);
-}