private Builder getTestSubscriberBuilder(MessageReceiver receiver) { return Subscriber.newBuilder(TEST_SUBSCRIPTION, receiver) .setExecutorProvider(FixedExecutorProvider.create(fakeExecutor)) .setSystemExecutorProvider(FixedExecutorProvider.create(fakeExecutor)) .setChannelProvider( FixedTransportChannelProvider.create(GrpcTransportChannel.create(testChannel))) .setCredentialsProvider(NoCredentialsProvider.create()) .setClock(fakeExecutor.getClock()) .setParallelPullCount(1); } }