Refactor integration tests to allow clock to be replaced.

bramble-core/src/main/java/org/briarproject/bramble/BrambleCoreModule.java

@@ -21,7 +21,6 @@ import org.briarproject.bramble.rendezvous.RendezvousModule;
 import org.briarproject.bramble.settings.SettingsModule;
 import org.briarproject.bramble.sync.SyncModule;
 import org.briarproject.bramble.sync.validation.ValidationModule;
-import org.briarproject.bramble.system.ClockModule;
 import org.briarproject.bramble.transport.TransportModule;
 import org.briarproject.bramble.versioning.VersioningModule;
 
@@ -29,7 +28,6 @@ import dagger.Module;
 
 @Module(includes = {
 		ClientModule.class,
-		ClockModule.class,
 		ConnectionModule.class,
 		ContactModule.class,
 		CryptoModule.class,

bramble-core/src/test/java/org/briarproject/bramble/test/BrambleCoreIntegrationTestModule.java

@@ -14,6 +14,7 @@ import dagger.Provides;
 		DefaultEventExecutorModule.class,
 		DefaultTaskSchedulerModule.class,
 		DefaultWakefulIoExecutorModule.class,
+		TestClockModule.class,
 		TestDatabaseConfigModule.class,
 		TestPluginConfigModule.class,
 		TestSecureRandomModule.class

bramble-core/src/test/java/org/briarproject/bramble/test/TestClockModule.java

@@ -0,0 +1,28 @@
+package org.briarproject.bramble.test;
+
+import org.briarproject.bramble.api.system.Clock;
+import org.briarproject.bramble.system.SystemClock;
+
+import java.util.concurrent.atomic.AtomicLong;
+
+import dagger.Module;
+import dagger.Provides;
+
+@Module
+public class TestClockModule {
+
+	private final Clock clock;
+
+	public TestClockModule() {
+		clock = new SystemClock();
+	}
+
+	public TestClockModule(AtomicLong time) {
+		clock = new SettableClock(time);
+	}
+
+	@Provides
+	Clock provideClock() {
+		return clock;
+	}
+}

bramble-java/src/main/java/org/briarproject/bramble/BrambleJavaModule.java

@@ -8,9 +8,9 @@ import org.briarproject.bramble.system.JavaSystemModule;
 import dagger.Module;
 
 @Module(includes = {
+		CircumventionModule.class,
 		JavaNetworkModule.class,
 		JavaSystemModule.class,
-		CircumventionModule.class,
 		SocksModule.class
 })
 public class BrambleJavaModule {

briar-android/src/main/java/org/briarproject/briar/android/AndroidComponent.java

@@ -29,6 +29,7 @@ import org.briarproject.bramble.api.system.AndroidWakeLockManager;
 import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.api.system.LocationUtils;
 import org.briarproject.bramble.plugin.tor.CircumventionProvider;
+import org.briarproject.bramble.system.ClockModule;
 import org.briarproject.briar.BriarCoreEagerSingletons;
 import org.briarproject.briar.BriarCoreModule;
 import org.briarproject.briar.android.attachment.AttachmentModule;
@@ -77,6 +78,7 @@ import dagger.Component;
 		BriarAccountModule.class,
 		AppModule.class,
 		AttachmentModule.class,
+		ClockModule.class,
 		MediaModule.class
 })
 public interface AndroidComponent

briar-android/src/test/java/org/briarproject/briar/android/logging/LoggingComponent.java

@@ -1,6 +1,7 @@
 package org.briarproject.briar.android.logging;
 
 import org.briarproject.bramble.BrambleCoreModule;
+import org.briarproject.bramble.system.ClockModule;
 import org.briarproject.bramble.test.TestSecureRandomModule;
 
 import java.security.SecureRandom;
@@ -11,6 +12,7 @@ import dagger.Component;
 
 @Singleton
 @Component(modules = {
+		ClockModule.class,
 		BrambleCoreModule.class,
 		TestSecureRandomModule.class,
 		LoggingModule.class,

briar-core/src/test/java/org/briarproject/briar/blog/BlogManagerIntegrationTest.java

@@ -127,7 +127,7 @@ public class BlogManagerIntegrationTest
 
 		// add a post to blog0
 		BlogPost p = blogPostFactory.createBlogPost(blog0.getId(),
-				clock.currentTimeMillis(), null, author0, text);
+				c0.getClock().currentTimeMillis(), null, author0, text);
 		blogManager0.addLocalPost(p);
 
 		// check that post is now in blog0
@@ -158,9 +158,8 @@ public class BlogManagerIntegrationTest
 	public void testBlogPostInWrongBlog() throws Exception {
 		// add a post to blog1
 		String text = getRandomString(42);
-		BlogPost p = blogPostFactory
-				.createBlogPost(blog1.getId(), clock.currentTimeMillis(), null,
-						author0, text);
+		BlogPost p = blogPostFactory.createBlogPost(blog1.getId(),
+				c0.getClock().currentTimeMillis(), null, author0, text);
 		blogManager0.addLocalPost(p);
 
 		// check that post is now in blog1
@@ -197,9 +196,8 @@ public class BlogManagerIntegrationTest
 	public void testBlogComment() throws Exception {
 		// add a post to blog0
 		String text = getRandomString(42);
-		BlogPost p = blogPostFactory
-				.createBlogPost(blog0.getId(), clock.currentTimeMillis(), null,
-						author0, text);
+		BlogPost p = blogPostFactory.createBlogPost(blog0.getId(),
+				c0.getClock().currentTimeMillis(), null, author0, text);
 		blogManager0.addLocalPost(p);
 
 		// sync the post over
@@ -242,9 +240,8 @@ public class BlogManagerIntegrationTest
 	public void testBlogCommentOnOwnPost() throws Exception {
 		// add a post to blog0
 		String text = getRandomString(42);
-		BlogPost p = blogPostFactory
-				.createBlogPost(blog0.getId(), clock.currentTimeMillis(), null,
-						author0, text);
+		BlogPost p = blogPostFactory.createBlogPost(blog0.getId(),
+				c0.getClock().currentTimeMillis(), null, author0, text);
 		blogManager0.addLocalPost(p);
 
 		// get header of own post
@@ -278,9 +275,8 @@ public class BlogManagerIntegrationTest
 	public void testCommentOnComment() throws Exception {
 		// add a post to blog0
 		String text = getRandomString(42);
-		BlogPost p = blogPostFactory
-				.createBlogPost(blog0.getId(), clock.currentTimeMillis(), null,
-						author0, text);
+		BlogPost p = blogPostFactory.createBlogPost(blog0.getId(),
+				c0.getClock().currentTimeMillis(), null, author0, text);
 		blogManager0.addLocalPost(p);
 
 		// sync the post over
@@ -366,9 +362,8 @@ public class BlogManagerIntegrationTest
 	public void testCommentOnOwnComment() throws Exception {
 		// add a post to blog0
 		String text = getRandomString(42);
-		BlogPost p = blogPostFactory
-				.createBlogPost(blog0.getId(), clock.currentTimeMillis(), null,
-						author0, text);
+		BlogPost p = blogPostFactory.createBlogPost(blog0.getId(),
+				c0.getClock().currentTimeMillis(), null, author0, text);
 		blogManager0.addLocalPost(p);
 
 		// sync the post over
@@ -411,9 +406,8 @@ public class BlogManagerIntegrationTest
 
 		// add a feed post to rssBlog
 		String text = getRandomString(42);
-		BlogPost p = blogPostFactory
-				.createBlogPost(rssBlog.getId(), clock.currentTimeMillis(),
-						null, author0, text);
+		BlogPost p = blogPostFactory.createBlogPost(rssBlog.getId(),
+				c0.getClock().currentTimeMillis(), null, author0, text);
 		blogManager0.addLocalPost(p);
 
 		// make sure it got saved as an RSS feed post
@@ -430,9 +424,8 @@ public class BlogManagerIntegrationTest
 	public void testFeedReblog() throws Exception {
 		// add a feed post to rssBlog
 		String text = getRandomString(42);
-		BlogPost p = blogPostFactory
-				.createBlogPost(rssBlog.getId(), clock.currentTimeMillis(),
-						null, author0, text);
+		BlogPost p = blogPostFactory.createBlogPost(rssBlog.getId(),
+				c0.getClock().currentTimeMillis(), null, author0, text);
 		blogManager0.addLocalPost(p);
 
 		// reblog feed post to own blog

briar-core/src/test/java/org/briarproject/briar/forum/ForumManagerTest.java

@@ -84,9 +84,9 @@ public class ForumManagerTest
 	@Test
 	public void testForumPost() throws Exception {
 		assertEquals(1, forumManager0.getForums().size());
-		long ms1 = clock.currentTimeMillis() - 1000L;
+		long ms1 = c0.getClock().currentTimeMillis() - 1000L;
 		String text1 = "some forum text";
-		long ms2 = clock.currentTimeMillis();
+		long ms2 = c0.getClock().currentTimeMillis();
 		String text2 = "some other forum text";
 		ForumPost post1 =
 				createForumPost(forum0.getGroup().getId(), null, text1, ms1);
@@ -136,7 +136,7 @@ public class ForumManagerTest
 	@Test
 	public void testForumPostDelivery() throws Exception {
 		// add one forum post
-		long time = clock.currentTimeMillis();
+		long time = c0.getClock().currentTimeMillis();
 		ForumPost post1 = createForumPost(groupId0, null, "a", time);
 		forumManager0.addLocalPost(post1);
 		assertEquals(1, forumManager0.getPostHeaders(groupId0).size());
@@ -150,7 +150,7 @@ public class ForumManagerTest
 		assertGroupCount(messageTracker1, groupId0, 1, 1, time);
 
 		// add another forum post
-		long time2 = clock.currentTimeMillis();
+		long time2 = c0.getClock().currentTimeMillis();
 		ForumPost post2 = createForumPost(groupId0, null, "b", time2);
 		forumManager1.addLocalPost(post2);
 		assertEquals(1, forumManager0.getPostHeaders(groupId0).size());
@@ -167,7 +167,7 @@ public class ForumManagerTest
 	@Test
 	public void testForumPostDeliveredAfterParent() throws Exception {
 		// add one forum post without the parent
-		long time = clock.currentTimeMillis();
+		long time = c0.getClock().currentTimeMillis();
 		ForumPost post1 = createForumPost(groupId0, null, "a", time);
 		ForumPost post2 = createForumPost(groupId0, post1, "a", time);
 		forumManager0.addLocalPost(post2);
@@ -199,7 +199,7 @@ public class ForumManagerTest
 		sync1To0(1, true);
 
 		// add one forum post with a parent in another forum
-		long time = clock.currentTimeMillis();
+		long time = c0.getClock().currentTimeMillis();
 		ForumPost post1 = createForumPost(g1, null, "a", time);
 		ForumPost post = createForumPost(groupId0, post1, "b", time);
 		forumManager0.addLocalPost(post);

briar-core/src/test/java/org/briarproject/briar/introduction/IntroductionIntegrationTest.java

@@ -1042,10 +1042,12 @@ public class IntroductionIntegrationTest
 		contactManager1.removeContact(contactId0From1);
 		SecretKey rootKey0_1 = getSecretKey();
 		contactId1From0 = contactManager0.addContact(author1, author0.getId(),
-				rootKey0_1, clock.currentTimeMillis(), true, true, true);
+				rootKey0_1, c0.getClock().currentTimeMillis(), true, true,
+				true);
 		contact1From0 = contactManager0.getContact(contactId1From0);
 		contactId0From1 = contactManager1.addContact(author0, author1.getId(),
-				rootKey0_1, clock.currentTimeMillis(), false, true, true);
+				rootKey0_1, c1.getClock().currentTimeMillis(), false, true,
+				true);
 		contact0From1 = contactManager1.getContact(contactId0From1);
 
 		// Sync initial client versioning updates and transport properties
@@ -1169,7 +1171,7 @@ public class IntroductionIntegrationTest
 				m -> new AcceptMessage(m.getMessageId(), m.getGroupId(),
 						m.getTimestamp(), m.getPreviousMessageId(),
 						m.getSessionId(), m.getEphemeralPublicKey(),
-						clock.currentTimeMillis(),
+						c0.getClock().currentTimeMillis(),
 						m.getTransportProperties(), NO_AUTO_DELETE_TIMER)
 		);
 	}

briar-core/src/test/java/org/briarproject/briar/messaging/MessagingManagerIntegrationTest.java

@@ -256,7 +256,7 @@ public class MessagingManagerIntegrationTest
 		// send legacy message
 		GroupId g = c0.getMessagingManager().getConversationId(contactId);
 		PrivateMessage m0 = messageFactory.createLegacyPrivateMessage(g,
-				clock.currentTimeMillis(), getRandomString(42));
+				c0.getClock().currentTimeMillis(), getRandomString(42));
 		c0.getMessagingManager().addLocalMessage(m0);
 		syncMessage(c0, c1, contactId, 1, true);
 
@@ -384,7 +384,8 @@ public class MessagingManagerIntegrationTest
 			throws Exception {
 		GroupId g = from.getMessagingManager().getConversationId(contactId);
 		PrivateMessage m = messageFactory.createPrivateMessage(g,
-				clock.currentTimeMillis(), text, attachments, autoDeleteTimer);
+				from.getClock().currentTimeMillis(), text, attachments,
+				autoDeleteTimer);
 		from.getMessagingManager().addLocalMessage(m);
 		syncMessage(from, to, contactId, 1 + attachments.size(), true);
 		return m;
@@ -395,7 +396,7 @@ public class MessagingManagerIntegrationTest
 		GroupId g = c.getMessagingManager().getConversationId(contactId);
 		InputStream stream = new ByteArrayInputStream(getRandomBytes(42));
 		return c.getMessagingManager().addLocalAttachment(g,
-				clock.currentTimeMillis(), "image/jpeg", stream);
+				c.getClock().currentTimeMillis(), "image/jpeg", stream);
 	}
 
 	private Collection<ConversationMessageHeader> getMessages(

briar-core/src/test/java/org/briarproject/briar/privategroup/PrivateGroupIntegrationTest.java

@@ -61,7 +61,7 @@ public class PrivateGroupIntegrationTest
 		privateGroup0 =
 				privateGroupFactory.createPrivateGroup("Test Group", author0);
 		groupId0 = privateGroup0.getId();
-		long joinTime = clock.currentTimeMillis();
+		long joinTime = c0.getClock().currentTimeMillis();
 		GroupMessage joinMsg0 = groupMessageFactory
 				.createJoinMessage(groupId0, joinTime, author0);
 		groupManager0.addPrivateGroup(privateGroup0, joinMsg0, true);
@@ -92,7 +92,8 @@ public class PrivateGroupIntegrationTest
 
 	@Test
 	public void testMembership() throws Exception {
-		sendInvitation(contactId1From0, clock.currentTimeMillis(), "Hi!");
+		sendInvitation(contactId1From0, c0.getClock().currentTimeMillis(),
+				"Hi!");
 
 		// our group has only one member (ourselves)
 		Collection<GroupMember> members = groupManager0.getMembers(groupId0);
@@ -135,8 +136,10 @@ public class PrivateGroupIntegrationTest
 	@Test
 	public void testRevealContacts() throws Exception {
 		// invite two contacts
-		sendInvitation(contactId1From0, clock.currentTimeMillis(), "Hi 1!");
-		sendInvitation(contactId2From0, clock.currentTimeMillis(), "Hi 2!");
+		sendInvitation(contactId1From0, c0.getClock().currentTimeMillis(),
+				"Hi 1!");
+		sendInvitation(contactId2From0, c0.getClock().currentTimeMillis(),
+				"Hi 2!");
 		sync0To1(1, true);
 		sync0To2(1, true);
 
@@ -182,7 +185,7 @@ public class PrivateGroupIntegrationTest
 				getGroupMember(groupManager2, author1.getId()).getVisibility());
 
 		// 2 sends a message to the group
-		long time = clock.currentTimeMillis();
+		long time = c2.getClock().currentTimeMillis();
 		String text = "This is a test message!";
 		MessageId previousMsgId = groupManager2.getPreviousMsgId(groupId0);
 		GroupMessage msg = groupMessageFactory

briar-core/src/test/java/org/briarproject/briar/privategroup/PrivateGroupManagerIntegrationTest.java

@@ -83,7 +83,7 @@ public class PrivateGroupManagerIntegrationTest
 		addGroup();
 
 		// create and add test message
-		long time = clock.currentTimeMillis();
+		long time = c0.getClock().currentTimeMillis();
 		String text = "This is a test message!";
 		MessageId previousMsgId =
 				groupManager0.getPreviousMsgId(groupId0);
@@ -125,7 +125,7 @@ public class PrivateGroupManagerIntegrationTest
 
 		// create and add test message with no previousMsgId
 		GroupMessage msg = groupMessageFactory.createGroupMessage(groupId0,
-				clock.currentTimeMillis(), null, author0, "test", null);
+				c0.getClock().currentTimeMillis(), null, author0, "test", null);
 		groupManager0.addLocalMessage(msg);
 
 		// sync test message
@@ -136,9 +136,9 @@ public class PrivateGroupManagerIntegrationTest
 
 		// create and add test message with random previousMsgId
 		MessageId previousMsgId = new MessageId(getRandomId());
-		msg = groupMessageFactory
-				.createGroupMessage(groupId0, clock.currentTimeMillis(), null,
-						author0, "test", previousMsgId);
+		msg = groupMessageFactory.createGroupMessage(groupId0,
+				c0.getClock().currentTimeMillis(), null, author0, "test",
+				previousMsgId);
 		groupManager0.addLocalMessage(msg);
 
 		// sync test message
@@ -149,9 +149,9 @@ public class PrivateGroupManagerIntegrationTest
 
 		// create and add test message with wrong previousMsgId
 		previousMsgId = groupManager1.getPreviousMsgId(groupId0);
-		msg = groupMessageFactory
-				.createGroupMessage(groupId0, clock.currentTimeMillis(), null,
-						author0, "test", previousMsgId);
+		msg = groupMessageFactory.createGroupMessage(groupId0,
+				c0.getClock().currentTimeMillis(), null, author0, "test",
+				previousMsgId);
 		groupManager0.addLocalMessage(msg);
 
 		// sync test message
@@ -168,9 +168,9 @@ public class PrivateGroupManagerIntegrationTest
 		// create and add test message with random parentMsgId
 		MessageId parentMsgId = new MessageId(getRandomId());
 		MessageId previousMsgId = groupManager0.getPreviousMsgId(groupId0);
-		GroupMessage msg = groupMessageFactory
-				.createGroupMessage(groupId0, clock.currentTimeMillis(),
-						parentMsgId, author0, "test", previousMsgId);
+		GroupMessage msg = groupMessageFactory.createGroupMessage(groupId0,
+				c0.getClock().currentTimeMillis(), parentMsgId, author0, "test",
+				previousMsgId);
 		groupManager0.addLocalMessage(msg);
 
 		// sync test message
@@ -181,9 +181,9 @@ public class PrivateGroupManagerIntegrationTest
 
 		// create and add test message with wrong parentMsgId
 		parentMsgId = previousMsgId;
-		msg = groupMessageFactory
-				.createGroupMessage(groupId0, clock.currentTimeMillis(),
-						parentMsgId, author0, "test", previousMsgId);
+		msg = groupMessageFactory.createGroupMessage(groupId0,
+				c0.getClock().currentTimeMillis(), parentMsgId, author0, "test",
+				previousMsgId);
 		groupManager0.addLocalMessage(msg);
 
 		// sync test message
@@ -211,7 +211,7 @@ public class PrivateGroupManagerIntegrationTest
 		assertEquals(2, groupManager1.getHeaders(groupId0).size());
 
 		// create and add test message with good timestamp
-		long time = clock.currentTimeMillis();
+		long time = c0.getClock().currentTimeMillis();
 		msg = groupMessageFactory
 				.createGroupMessage(groupId0, time, null, author0, "test",
 						previousMsgId);
@@ -238,7 +238,7 @@ public class PrivateGroupManagerIntegrationTest
 	@Test
 	public void testWrongJoinMessages1() throws Exception {
 		// author0 joins privateGroup0 with wrong join message
-		long joinTime = clock.currentTimeMillis();
+		long joinTime = c0.getClock().currentTimeMillis();
 		GroupMessage joinMsg0 = groupMessageFactory
 				.createJoinMessage(privateGroup0.getId(), joinTime, author0,
 						joinTime, getRandomBytes(12));
@@ -251,7 +251,7 @@ public class PrivateGroupManagerIntegrationTest
 				contactId1From0, privateGroup0.getId(), SHARED));
 
 		// author1 joins privateGroup0 with wrong timestamp
-		joinTime = clock.currentTimeMillis();
+		joinTime = c1.getClock().currentTimeMillis();
 		long inviteTime = joinTime;
 		Contact c1 = contactManager0.getContact(contactId1From0);
 		byte[] creatorSignature = groupInvitationFactory
@@ -283,7 +283,7 @@ public class PrivateGroupManagerIntegrationTest
 	@Test
 	public void testWrongJoinMessages2() throws Exception {
 		// author0 joins privateGroup0 with wrong member's join message
-		long joinTime = clock.currentTimeMillis();
+		long joinTime = c0.getClock().currentTimeMillis();
 		long inviteTime = joinTime - 1;
 		BdfList toSign = groupInvitationFactory
 				.createInviteToken(author0.getId(), author0.getId(),
@@ -303,7 +303,7 @@ public class PrivateGroupManagerIntegrationTest
 				contactId1From0, privateGroup0.getId(), SHARED));
 
 		// author1 joins privateGroup0 with wrong signature in join message
-		joinTime = clock.currentTimeMillis();
+		joinTime = c1.getClock().currentTimeMillis();
 		inviteTime = joinTime - 1;
 		// signature uses joiner's key, not creator's key
 		Contact c1 = contactManager0.getContact(contactId1From0);
@@ -365,7 +365,7 @@ public class PrivateGroupManagerIntegrationTest
 				contactId2From0, privateGroup0.getId(), SHARED));
 
 		// author2 joins privateGroup0
-		long joinTime = clock.currentTimeMillis();
+		long joinTime = c2.getClock().currentTimeMillis();
 		long inviteTime = joinTime - 1;
 		Contact c2 = contactManager0.getContact(contactId2From0);
 		byte[] creatorSignature = groupInvitationFactory
@@ -447,7 +447,7 @@ public class PrivateGroupManagerIntegrationTest
 
 	private void addGroup() throws Exception {
 		// author0 joins privateGroup0
-		long joinTime = clock.currentTimeMillis();
+		long joinTime = c0.getClock().currentTimeMillis();
 		GroupMessage joinMsg0 = groupMessageFactory
 				.createJoinMessage(privateGroup0.getId(), joinTime, author0);
 		groupManager0.addPrivateGroup(privateGroup0, joinMsg0, true);
@@ -459,7 +459,7 @@ public class PrivateGroupManagerIntegrationTest
 				contactId1From0, privateGroup0.getId(), SHARED));
 
 		// author1 joins privateGroup0
-		joinTime = clock.currentTimeMillis();
+		joinTime = c1.getClock().currentTimeMillis();
 		long inviteTime = joinTime - 1;
 		Contact c1 = contactManager0.getContact(contactId1From0);
 		byte[] creatorSignature = groupInvitationFactory

briar-core/src/test/java/org/briarproject/briar/privategroup/invitation/GroupInvitationIntegrationTest.java

@@ -57,7 +57,7 @@ public class GroupInvitationIntegrationTest
 
 		privateGroup =
 				privateGroupFactory.createPrivateGroup("Testgroup", author0);
-		long joinTime = clock.currentTimeMillis();
+		long joinTime = c0.getClock().currentTimeMillis();
 		GroupMessage joinMsg0 = groupMessageFactory
 				.createJoinMessage(privateGroup.getId(), joinTime, author0);
 		groupManager0.addPrivateGroup(privateGroup, joinMsg0, true);
@@ -88,7 +88,7 @@ public class GroupInvitationIntegrationTest
 
 	@Test
 	public void testSendInvitation() throws Exception {
-		long timestamp = clock.currentTimeMillis();
+		long timestamp = c0.getClock().currentTimeMillis();
 		String text = "Hi!";
 		sendInvitation(timestamp, text);
 
@@ -120,7 +120,7 @@ public class GroupInvitationIntegrationTest
 
 	@Test
 	public void testInvitationDecline() throws Exception {
-		long timestamp = clock.currentTimeMillis();
+		long timestamp = c0.getClock().currentTimeMillis();
 		sendInvitation(timestamp, null);
 
 		sync0To1(1, true);
@@ -172,7 +172,7 @@ public class GroupInvitationIntegrationTest
 		setAutoDeleteTimer(c1, contactId0From1, MIN_AUTO_DELETE_TIMER_MS);
 
 		// Send invitation
-		sendInvitation(clock.currentTimeMillis(), null);
+		sendInvitation(c0.getClock().currentTimeMillis(), null);
 		sync0To1(1, true);
 
 		// Decline invitation
@@ -194,7 +194,7 @@ public class GroupInvitationIntegrationTest
 
 	@Test
 	public void testInvitationAccept() throws Exception {
-		long timestamp = clock.currentTimeMillis();
+		long timestamp = c0.getClock().currentTimeMillis();
 		sendInvitation(timestamp, null);
 
 		// check that invitation message state is correct
@@ -257,7 +257,7 @@ public class GroupInvitationIntegrationTest
 		setAutoDeleteTimer(c1, contactId0From1, MIN_AUTO_DELETE_TIMER_MS);
 
 		// Send invitation
-		sendInvitation(clock.currentTimeMillis(), null);
+		sendInvitation(c0.getClock().currentTimeMillis(), null);
 		sync0To1(1, true);
 
 		// Accept invitation
@@ -281,7 +281,7 @@ public class GroupInvitationIntegrationTest
 
 	@Test
 	public void testGroupCount() throws Exception {
-		long timestamp = clock.currentTimeMillis();
+		long timestamp = c0.getClock().currentTimeMillis();
 		sendInvitation(timestamp, null);
 
 		// 0 has one read outgoing message
@@ -313,7 +313,7 @@ public class GroupInvitationIntegrationTest
 
 	@Test
 	public void testMultipleInvitations() throws Exception {
-		sendInvitation(clock.currentTimeMillis(), null);
+		sendInvitation(c0.getClock().currentTimeMillis(), null);
 
 		// invitation is not allowed before the first hasn't been answered
 		assertFalse(groupInvitationManager0
@@ -330,7 +330,7 @@ public class GroupInvitationIntegrationTest
 				.isInvitationAllowed(contact1From0, privateGroup.getId()));
 
 		// send and accept the second invitation
-		sendInvitation(clock.currentTimeMillis(), "Second Invitation");
+		sendInvitation(c0.getClock().currentTimeMillis(), "Second Invitation");
 		sync0To1(1, true);
 		groupInvitationManager1
 				.respondToInvitation(contactId0From1, privateGroup, true);
@@ -342,7 +342,8 @@ public class GroupInvitationIntegrationTest
 
 		// don't allow another invitation request
 		try {
-			sendInvitation(clock.currentTimeMillis(), "Third Invitation");
+			sendInvitation(c0.getClock().currentTimeMillis(),
+					"Third Invitation");
 			fail();
 		} catch (ProtocolStateException e) {
 			// expected
@@ -351,7 +352,7 @@ public class GroupInvitationIntegrationTest
 
 	@Test(expected = ProtocolStateException.class)
 	public void testInvitationsWithSameTimestamp() throws Exception {
-		long timestamp = clock.currentTimeMillis();
+		long timestamp = c0.getClock().currentTimeMillis();
 		sendInvitation(timestamp, null);
 		sync0To1(1, true);
 
@@ -369,7 +370,7 @@ public class GroupInvitationIntegrationTest
 	@Test(expected = ProtocolStateException.class)
 	public void testCreatorLeavesBeforeInvitationAccepted() throws Exception {
 		// Creator invites invitee to join group
-		sendInvitation(clock.currentTimeMillis(), null);
+		sendInvitation(c0.getClock().currentTimeMillis(), null);
 
 		// Creator's invite message is delivered to invitee
 		sync0To1(1, true);
@@ -392,7 +393,7 @@ public class GroupInvitationIntegrationTest
 	@Test
 	public void testCreatorLeavesBeforeInvitationDeclined() throws Exception {
 		// Creator invites invitee to join group
-		sendInvitation(clock.currentTimeMillis(), null);
+		sendInvitation(c0.getClock().currentTimeMillis(), null);
 
 		// Creator's invite message is delivered to invitee
 		sync0To1(1, true);
@@ -419,7 +420,7 @@ public class GroupInvitationIntegrationTest
 	public void testCreatorLeavesConcurrentlyWithInvitationAccepted()
 			throws Exception {
 		// Creator invites invitee to join group
-		sendInvitation(clock.currentTimeMillis(), null);
+		sendInvitation(c0.getClock().currentTimeMillis(), null);
 
 		// Creator's invite message is delivered to invitee
 		sync0To1(1, true);
@@ -450,7 +451,7 @@ public class GroupInvitationIntegrationTest
 	public void testCreatorLeavesConcurrentlyWithInvitationDeclined()
 			throws Exception {
 		// Creator invites invitee to join group
-		sendInvitation(clock.currentTimeMillis(), null);
+		sendInvitation(c0.getClock().currentTimeMillis(), null);
 
 		// Creator's invite message is delivered to invitee
 		sync0To1(1, true);
@@ -477,7 +478,7 @@ public class GroupInvitationIntegrationTest
 	public void testCreatorLeavesConcurrentlyWithMemberLeaving()
 			throws Exception {
 		// Creator invites invitee to join group
-		sendInvitation(clock.currentTimeMillis(), null);
+		sendInvitation(c0.getClock().currentTimeMillis(), null);
 
 		// Creator's invite message is delivered to invitee
 		sync0To1(1, true);
@@ -517,7 +518,7 @@ public class GroupInvitationIntegrationTest
 	public void testDeletingAllMessagesWhenCompletingSession()
 			throws Exception {
 		// send invitation
-		sendInvitation(clock.currentTimeMillis(), null);
+		sendInvitation(c0.getClock().currentTimeMillis(), null);
 		sync0To1(1, true);
 
 		// messages can not be deleted
@@ -572,7 +573,7 @@ public class GroupInvitationIntegrationTest
 	@Test
 	public void testDeletingAllMessagesWhenDeclining() throws Exception {
 		// send invitation
-		sendInvitation(clock.currentTimeMillis(), null);
+		sendInvitation(c0.getClock().currentTimeMillis(), null);
 		sync0To1(1, true);
 
 		// respond
@@ -608,7 +609,7 @@ public class GroupInvitationIntegrationTest
 		assertGroupCount(messageTracker1, g0From1.getId(), 0, 0);
 
 		// creator can re-invite
-		sendInvitation(clock.currentTimeMillis(), null);
+		sendInvitation(c0.getClock().currentTimeMillis(), null);
 		sync0To1(1, true);
 
 		// now new messages can not be deleted anymore
@@ -639,7 +640,7 @@ public class GroupInvitationIntegrationTest
 	@Test
 	public void testDeletingSomeMessages() throws Exception {
 		// send invitation
-		sendInvitation(clock.currentTimeMillis(), null);
+		sendInvitation(c0.getClock().currentTimeMillis(), null);
 		sync0To1(1, true);
 
 		// deleting the invitation will fail for both

briar-core/src/test/java/org/briarproject/briar/sharing/ForumSharingIntegrationTest.java

@@ -725,7 +725,7 @@ public class ForumSharingIntegrationTest
 		assertResponseReceived(listener0, contactId1From0, true);
 
 		// sharer posts into the forum
-		long time = clock.currentTimeMillis();
+		long time = c0.getClock().currentTimeMillis();
 		String text = getRandomString(42);
 		ForumPost p = forumPostFactory
 				.createPost(forum.getId(), time, null, author0, text);
@@ -743,7 +743,7 @@ public class ForumSharingIntegrationTest
 		assertEquals(author0, header.getAuthor());
 
 		// now invitee creates a post
-		time = clock.currentTimeMillis();
+		time = c1.getClock().currentTimeMillis();
 		text = getRandomString(42);
 		p = forumPostFactory
 				.createPost(forum.getId(), time, null, author1, text);
@@ -789,7 +789,7 @@ public class ForumSharingIntegrationTest
 		assertResponseReceived(listener0, contactId1From0, true);
 
 		// now invitee creates a post
-		time = clock.currentTimeMillis();
+		time = c1.getClock().currentTimeMillis();
 		text = getRandomString(42);
 		p = forumPostFactory
 				.createPost(forum.getId(), time, null, author1, text);
@@ -848,7 +848,7 @@ public class ForumSharingIntegrationTest
 		// send an accept message for the same forum
 		Message m = messageEncoder.encodeAcceptMessage(
 				forumSharingManager0.getContactGroup(contact1From0).getId(),
-				forum.getId(), clock.currentTimeMillis(), invitationId);
+				forum.getId(), c0.getClock().currentTimeMillis(), invitationId);
 		c0.getClientHelper().addLocalMessage(m, new BdfDictionary(), true);
 
 		// sync unexpected message and the expected abort message back

briar-core/src/test/java/org/briarproject/briar/test/BriarIntegrationTest.java

@@ -26,7 +26,6 @@ import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.sync.MessageId;
 import org.briarproject.bramble.api.sync.event.MessageStateChangedEvent;
 import org.briarproject.bramble.api.sync.event.MessagesAckedEvent;
-import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.test.TestTransportConnectionReader;
 import org.briarproject.bramble.test.TestTransportConnectionWriter;
 import org.briarproject.bramble.test.TestUtils;
@@ -96,8 +95,6 @@ public abstract class BriarIntegrationTest<C extends BriarIntegrationTestCompone
 	private LifecycleManager lifecycleManager0, lifecycleManager1,
 			lifecycleManager2;
 
-	@Inject
-	protected Clock clock;
 	@Inject
 	protected CryptoComponent crypto;
 	@Inject
@@ -139,9 +136,9 @@ public abstract class BriarIntegrationTest<C extends BriarIntegrationTestCompone
 	private final SecretKey rootKey0_2 = getSecretKey();
 	private final SecretKey rootKey1_2 = getSecretKey();
 
-	protected File t0Dir = new File(testDir, AUTHOR0);
-	protected File t1Dir = new File(testDir, AUTHOR1);
-	protected File t2Dir = new File(testDir, AUTHOR2);
+	protected final File t0Dir = new File(testDir, AUTHOR0);
+	protected final File t1Dir = new File(testDir, AUTHOR1);
+	protected final File t2Dir = new File(testDir, AUTHOR2);
 
 	@Before
 	public void setUp() throws Exception {
@@ -269,16 +266,20 @@ public abstract class BriarIntegrationTest<C extends BriarIntegrationTestCompone
 
 	protected void addDefaultContacts() throws Exception {
 		contactId1From0 = contactManager0.addContact(author1, author0.getId(),
-				rootKey0_1, clock.currentTimeMillis(), true, true, true);
+				rootKey0_1, c0.getClock().currentTimeMillis(), true, true,
+				true);
 		contact1From0 = contactManager0.getContact(contactId1From0);
 		contactId0From1 = contactManager1.addContact(author0, author1.getId(),
-				rootKey0_1, clock.currentTimeMillis(), false, true, true);
+				rootKey0_1, c1.getClock().currentTimeMillis(), false, true,
+				true);
 		contact0From1 = contactManager1.getContact(contactId0From1);
 		contactId2From0 = contactManager0.addContact(author2, author0.getId(),
-				rootKey0_2, clock.currentTimeMillis(), true, true, true);
+				rootKey0_2, c0.getClock().currentTimeMillis(), true, true,
+				true);
 		contact2From0 = contactManager0.getContact(contactId2From0);
 		contactId0From2 = contactManager2.addContact(author0, author2.getId(),
-				rootKey0_2, clock.currentTimeMillis(), false, true, true);
+				rootKey0_2, c2.getClock().currentTimeMillis(), false, true,
+				true);
 		contact0From2 = contactManager2.getContact(contactId0From2);
 
 		// Sync initial client versioning updates
@@ -297,9 +298,11 @@ public abstract class BriarIntegrationTest<C extends BriarIntegrationTestCompone
 	protected void addContacts1And2(boolean haveTransportProperties)
 			throws Exception {
 		contactId2From1 = contactManager1.addContact(author2, author1.getId(),
-				rootKey1_2, clock.currentTimeMillis(), true, true, true);
+				rootKey1_2, c1.getClock().currentTimeMillis(), true, true,
+				true);
 		contactId1From2 = contactManager2.addContact(author1, author2.getId(),
-				rootKey1_2, clock.currentTimeMillis(), false, true, true);
+				rootKey1_2, c2.getClock().currentTimeMillis(), false, true,
+				true);
 
 		// Sync initial client versioning updates
 		sync1To2(1, true);

briar-core/src/test/java/org/briarproject/briar/test/BriarIntegrationTestComponent.java

@@ -11,6 +11,7 @@ import org.briarproject.bramble.api.identity.AuthorFactory;
 import org.briarproject.bramble.api.identity.IdentityManager;
 import org.briarproject.bramble.api.lifecycle.LifecycleManager;
 import org.briarproject.bramble.api.properties.TransportPropertyManager;
+import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.test.BrambleCoreIntegrationTestModule;
 import org.briarproject.briar.api.attachment.AttachmentReader;
 import org.briarproject.briar.api.autodelete.AutoDeleteManager;
@@ -134,6 +135,8 @@ public interface BriarIntegrationTestComponent
 
 	AutoDeleteManager getAutoDeleteManager();
 
+	Clock getClock();
+
 	class Helper {
 
 		public static void injectEagerSingletons(

briar-headless/src/main/java/org/briarproject/briar/headless/HeadlessModule.kt

@@ -17,6 +17,7 @@ import org.briarproject.bramble.network.JavaNetworkModule
 import org.briarproject.bramble.plugin.tor.CircumventionModule
 import org.briarproject.bramble.plugin.tor.UnixTorPluginFactory
 import org.briarproject.bramble.socks.SocksModule
+import org.briarproject.bramble.system.ClockModule
 import org.briarproject.bramble.system.DefaultTaskSchedulerModule
 import org.briarproject.bramble.system.DefaultWakefulIoExecutorModule
 import org.briarproject.bramble.system.DesktopSecureRandomModule
@@ -36,6 +37,7 @@ import javax.inject.Singleton
     includes = [
         AccountModule::class,
         CircumventionModule::class,
+        ClockModule::class,
         DefaultBatteryManagerModule::class,
         DefaultEventExecutorModule::class,
         DefaultTaskSchedulerModule::class,

briar-headless/src/test/java/org/briarproject/briar/headless/HeadlessTestModule.kt

@@ -14,6 +14,7 @@ import org.briarproject.bramble.event.DefaultEventExecutorModule
 import org.briarproject.bramble.network.JavaNetworkModule
 import org.briarproject.bramble.plugin.tor.CircumventionModule
 import org.briarproject.bramble.socks.SocksModule
+import org.briarproject.bramble.system.ClockModule
 import org.briarproject.bramble.system.DefaultTaskSchedulerModule
 import org.briarproject.bramble.system.DefaultWakefulIoExecutorModule
 import org.briarproject.bramble.system.JavaSystemModule
@@ -34,6 +35,7 @@ import javax.inject.Singleton
         JavaSystemModule::class,
         AccountModule::class,
         CircumventionModule::class,
+        ClockModule::class,
         DefaultEventExecutorModule::class,
         DefaultTaskSchedulerModule::class,
         DefaultWakefulIoExecutorModule::class,