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// Copyright (c) 2012, 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 MintMakerTest;
import 'dart:async';
import 'dart:isolate';
import 'package:unittest/unittest.dart';
import "remote_unittest_helper.dart";
class Mint {
Map<SendPort, Purse> _registry;
SendPort port;
Mint() : _registry = new Map<SendPort, Purse>() {
ReceivePort mintPort = new ReceivePort();
port = mintPort.sendPort;
serveMint(mintPort);
}
void serveMint(ReceivePort port) {
port.listen((message) {
int balance = message[0];
Purse purse = createPurse(balance);
message[1].send(purse.port);
});
}
Purse createPurse(int balance) {
Purse purse = new Purse(this, balance);
_registry[purse.port] = purse;
return purse;
}
Purse lookupPurse(SendPort port) {
return _registry[port];
}
}
class MintWrapper {
SendPort _mint;
MintWrapper(SendPort this._mint) {}
void createPurse(int balance, handlePurse(PurseWrapper purse)) {
ReceivePort reply = new ReceivePort();
reply.first.then((purse) {
handlePurse(new PurseWrapper(purse as SendPort));
});
_mint.send([balance, reply.sendPort]);
}
}
class Purse {
Mint mint;
int balance;
SendPort port;
Purse(this.mint, this.balance) {
ReceivePort recipient = new ReceivePort();
port = recipient.sendPort;
servePurse(recipient);
}
void servePurse(ReceivePort recipient) {
recipient.listen((message) {
String command = message[0];
if (command == "balance") {
SendPort replyTo = message.last;
replyTo.send(queryBalance());
} else if (command == "deposit") {
Purse source = mint.lookupPurse(message[2]);
deposit(message[1], source);
} else if (command == "sprout") {
SendPort replyTo = message.last;
Purse result = sproutPurse();
replyTo.send(result.port);
} else {
// TODO: Send an exception back.
throw new UnsupportedError("Unsupported commend: $command");
}
});
}
int queryBalance() {
return balance;
}
Purse sproutPurse() {
return mint.createPurse(0);
}
void deposit(int amount, Purse source) {
// TODO: Throw an exception if the source purse doesn't hold
// enough dough.
balance += amount;
source.balance -= amount;
}
}
class PurseWrapper {
SendPort _purse;
PurseWrapper(this._purse) {}
void _sendReceive<T>(String message, replyHandler(T reply)) {
ReceivePort reply = new ReceivePort();
_purse.send([message, reply.sendPort]);
reply.first.then((a) => replyHandler(a as T));
}
void queryBalance(handleBalance(int balance)) {
_sendReceive("balance", handleBalance);
}
void sproutPurse(handleSprouted(PurseWrapper sprouted)) {
_sendReceive("sprout", (SendPort sprouted) {
handleSprouted(new PurseWrapper(sprouted));
});
}
void deposit(PurseWrapper source, int amount) {
_purse.send(["deposit", amount, source._purse]);
}
}
mintMakerWrapper(SendPort replyPort) {
ReceivePort receiver = new ReceivePort();
replyPort.send(receiver.sendPort);
receiver.listen((replyTo) {
Mint mint = new Mint();
(replyTo as SendPort).send(mint.port);
});
}
class MintMakerWrapper {
final SendPort _port;
static Future<MintMakerWrapper> create() {
ReceivePort reply = new ReceivePort();
return Isolate
.spawn(mintMakerWrapper, reply.sendPort)
.then((_) => reply.first.then((port) => new MintMakerWrapper._(port)));
}
MintMakerWrapper._(this._port);
void makeMint(handleMint(MintWrapper mint)) {
ReceivePort reply = new ReceivePort();
reply.first.then((mint) {
handleMint(new MintWrapper(mint as SendPort));
});
_port.send(reply.sendPort);
}
}
_checkBalance(PurseWrapper wrapper, expected) {
wrapper.queryBalance(expectAsync((int balance) {
expect(balance, equals(expected));
}));
}
void main([args, port]) {
if (testRemote(main, port)) return;
test("creating purse, deposit, and query balance", () {
MintMakerWrapper.create().then(expectAsync((mintMaker) {
mintMaker.makeMint(expectAsync((MintWrapper mint) {
mint.createPurse(100, expectAsync((PurseWrapper purse) {
_checkBalance(purse, 100);
purse.sproutPurse(expectAsync((PurseWrapper sprouted) {
_checkBalance(sprouted, 0);
_checkBalance(purse, 100);
sprouted.deposit(purse, 5);
_checkBalance(sprouted, 0 + 5);
_checkBalance(purse, 100 - 5);
sprouted.deposit(purse, 42);
_checkBalance(sprouted, 0 + 5 + 42);
_checkBalance(purse, 100 - 5 - 42);
}));
}));
}));
}));
});
}