TEST_F(LogStateTest, Diff)
{
Future<Variable<Slaves>> future1 = state->fetch<Slaves>("slaves");
AWAIT_READY(future1);
Variable<Slaves> variable = future1.get();
Slaves slaves = variable.get();
ASSERT_EQ(0, slaves.slaves().size());
for (size_t i = 0; i < 1024; i++) {
Slave* slave = slaves.add_slaves();
slave->mutable_info()->set_hostname("localhost" + stringify(i));
}
variable = variable.mutate(slaves);
Future<Option<Variable<Slaves>>> future2 = state->store(variable);
AWAIT_READY(future2);
ASSERT_SOME(future2.get());
variable = future2.get().get();
Slave* slave = slaves.add_slaves();
slave->mutable_info()->set_hostname("localhost1024");
variable = variable.mutate(slaves);
future2 = state->store(variable);
AWAIT_READY(future2);
ASSERT_SOME(future2.get());
// It's possible that we're doing truncation asynchronously which
// will cause the test to fail because we'll end up getting a
// pending position from Log::Reader::ending which will cause
// Log::Reader::read to fail. To remedy this, we pause the clock and
// wait for all executing processe to settle.
Clock::pause();
Clock::settle();
Clock::resume();
Log::Reader reader(log);
Future<Log::Position> beginning = reader.beginning();
Future<Log::Position> ending = reader.ending();
AWAIT_READY(beginning);
AWAIT_READY(ending);
Future<list<Log::Entry>> entries = reader.read(beginning.get(), ending.get());
AWAIT_READY(entries);
// Convert each Log::Entry to a Operation.
vector<Operation> operations;
foreach (const Log::Entry& entry, entries.get()) {
// Parse the Operation from the Log::Entry.
Operation operation;
google::protobuf::io::ArrayInputStream stream(
entry.data.data(),
entry.data.size());
ASSERT_TRUE(operation.ParseFromZeroCopyStream(&stream));
operations.push_back(operation);
}
ASSERT_EQ(2u, operations.size());
EXPECT_EQ(Operation::SNAPSHOT, operations[0].type());
EXPECT_EQ(Operation::DIFF, operations[1].type());
}
TEST_F(LogStateTest, Diff)
{
Future<Variable<Slaves>> future1 = state->fetch<Slaves>("slaves");
AWAIT_READY(future1);
Variable<Slaves> variable = future1.get();
Slaves slaves = variable.get();
ASSERT_EQ(0, slaves.slaves().size());
for (size_t i = 0; i < 1024; i++) {
Slave* slave = slaves.add_slaves();
slave->mutable_info()->set_hostname("localhost" + stringify(i));
}
variable = variable.mutate(slaves);
Future<Option<Variable<Slaves>>> future2 = state->store(variable);
AWAIT_READY(future2);
ASSERT_SOME(future2.get());
variable = future2.get().get();
Slave* slave = slaves.add_slaves();
slave->mutable_info()->set_hostname("localhost1024");
variable = variable.mutate(slaves);
future2 = state->store(variable);
AWAIT_READY(future2);
ASSERT_SOME(future2.get());
Log::Reader reader(log);
Future<Log::Position> beginning = reader.beginning();
Future<Log::Position> ending = reader.ending();
AWAIT_READY(beginning);
AWAIT_READY(ending);
Future<list<Log::Entry>> entries = reader.read(beginning.get(), ending.get());
AWAIT_READY(entries);
// Convert each Log::Entry to a Operation.
vector<Operation> operations;
foreach (const Log::Entry& entry, entries.get()) {
// Parse the Operation from the Log::Entry.
Operation operation;
google::protobuf::io::ArrayInputStream stream(
entry.data.data(),
entry.data.size());
ASSERT_TRUE(operation.ParseFromZeroCopyStream(&stream));
operations.push_back(operation);
}
ASSERT_EQ(2u, operations.size());
EXPECT_EQ(Operation::SNAPSHOT, operations[0].type());
EXPECT_EQ(Operation::DIFF, operations[1].type());
}