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// Copyright (C) 2015 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.google.gerrit.testing;
import static java.util.stream.Collectors.toList;
import com.google.auto.value.AutoValue;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.common.flogger.FluentLogger;
import com.google.gerrit.common.Nullable;
import com.google.gerrit.common.errors.EmailException;
import com.google.gerrit.mail.Address;
import com.google.gerrit.mail.EmailHeader;
import com.google.gerrit.mail.MailHeader;
import com.google.gerrit.server.git.WorkQueue;
import com.google.gerrit.server.mail.send.EmailSender;
import com.google.inject.AbstractModule;
import com.google.inject.Inject;
import com.google.inject.Singleton;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ExecutionException;
/**
* Email sender implementation that records messages in memory.
*
* <p>This class is mostly threadsafe. The only exception is that not all {@link EmailHeader}
* subclasses are immutable. In particular, if a caller holds a reference to an {@code AddressList}
* and mutates it after sending, the message returned by {@link #getMessages()} may or may not
* reflect mutations.
*/
@Singleton
public class FakeEmailSender implements EmailSender {
private static final FluentLogger logger = FluentLogger.forEnclosingClass();
public static class Module extends AbstractModule {
@Override
public void configure() {
bind(EmailSender.class).to(FakeEmailSender.class);
}
}
@AutoValue
public abstract static class Message {
private static Message create(
Address from,
Collection<Address> rcpt,
Map<String, EmailHeader> headers,
String body,
String htmlBody) {
return new AutoValue_FakeEmailSender_Message(
from, ImmutableList.copyOf(rcpt), ImmutableMap.copyOf(headers), body, htmlBody);
}
public abstract Address from();
public abstract ImmutableList<Address> rcpt();
public abstract ImmutableMap<String, EmailHeader> headers();
public abstract String body();
@Nullable
public abstract String htmlBody();
}
private final WorkQueue workQueue;
private final List<Message> messages;
private int messagesRead;
@Inject
FakeEmailSender(WorkQueue workQueue) {
this.workQueue = workQueue;
messages = Collections.synchronizedList(new ArrayList<Message>());
messagesRead = 0;
}
@Override
public boolean isEnabled() {
return true;
}
@Override
public boolean canEmail(String address) {
return true;
}
@Override
public void send(
Address from, Collection<Address> rcpt, Map<String, EmailHeader> headers, String body)
throws EmailException {
send(from, rcpt, headers, body, null);
}
@Override
public void send(
Address from,
Collection<Address> rcpt,
Map<String, EmailHeader> headers,
String body,
String htmlBody)
throws EmailException {
messages.add(Message.create(from, rcpt, headers, body, htmlBody));
}
public void clear() {
waitForEmails();
synchronized (messages) {
messages.clear();
messagesRead = 0;
}
}
public synchronized @Nullable Message peekMessage() {
if (messagesRead >= messages.size()) {
return null;
}
return messages.get(messagesRead);
}
public synchronized @Nullable Message nextMessage() {
Message msg = peekMessage();
messagesRead++;
return msg;
}
public ImmutableList<Message> getMessages() {
waitForEmails();
synchronized (messages) {
return ImmutableList.copyOf(messages);
}
}
public List<Message> getMessages(String changeId, String type) {
final String idFooter = "\n" + MailHeader.CHANGE_ID.withDelimiter() + changeId + "\n";
final String typeFooter = "\n" + MailHeader.MESSAGE_TYPE.withDelimiter() + type + "\n";
return getMessages().stream()
.filter(in -> in.body().contains(idFooter) && in.body().contains(typeFooter))
.collect(toList());
}
private void waitForEmails() {
// TODO(dborowitz): This is brittle; consider forcing emails to use
// a single thread in tests (tricky because most callers just use the
// default executor).
for (WorkQueue.Task<?> task : workQueue.getTasks()) {
if (task.toString().contains("send-email")) {
try {
task.get();
} catch (ExecutionException | InterruptedException e) {
logger.atWarning().withCause(e).log("error finishing email task");
}
}
}
}
}
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