public void AppendEntriesReturnsFalseIfPrevEntryTermDoesNotMatch()
{
// Arrange
var message = new AppendEntriesRequest
{
PreviousLogIndex = 0,
PreviousLogTerm = 1
};
var raftNode = Substitute.For <INode>();
raftNode.CurrentState.Returns(NodeState.Follower);
var timer = Substitute.For <INodeTimer>();
var appendEntriesPublisher = Substitute.For <IPublishToBuffer <AppendEntriesRequested> >();
var nodePublisher = Substitute.For <IPublishToBuffer <NodeCommandScheduled, NodeCommandResult> >();
var service = new RaftService(appendEntriesPublisher, nodePublisher, timer, raftNode);
var raftLog = new NodeLog();
raftLog.SetLogEntry(1, 2L);
raftNode.Data.Returns(new NodeData {
Log = raftLog
});
// Act
var response = service.AppendEntries(message);
// Assert
response.Success.Should().BeFalse(
"because node cannot apply log if the term " +
"for the leaders previous log index does not match.");
}
public void ThrowsErrorIfCommitIndexIsLessThanOne()
{
// Arrange
var raftLog = new NodeLog();
// Act, Assert
Assert.Throws <IndexOutOfRangeException>(() => raftLog.SetLogEntry(0, 10));
}
public void CanTruncateLogFromGivenIndex()
{
// Arrange
const int initialCount = 10;
const int truncateFromIndex = 5;
var nodeLog = new NodeLog();
for (var i = 0; i < initialCount; i++)
{
nodeLog.SetLogEntry(i + 1, 1);
}
// Act
nodeLog.TruncateLog(truncateFromIndex);
// Assert
nodeLog[truncateFromIndex].Should().Be(1);
for (var i = truncateFromIndex; i < initialCount; i++)
{
nodeLog[i + 1].Should().NotHaveValue();
}
}
