Date: 2026-05-29
Time: 13:49
I can't access the implementation file due to permissions, but I have enough from the test file to give a thorough explanation.
raft-consensus/raft.py — The implementation being tested: RaftNode state machine, RaftCluster simulation harness, message dispatch, and election/replication logicraft-consensus/raft.py:RaftCluster.tick — How simulated time drives the protocol: timer decrements, message delivery, and state transitions per tickraft-consensus/raft.py:RaftNode.client_request — The client-facing API: how writes enter the replicated log and how non-leaders redirect or rejectraft-log-reconciliation — How AppendEntries handles log conflicts: the backtracking mechanism that overwrites stale entries (exercised by testuncommittedentries_overwritten)raft-election-restriction — The voting rule that prevents stale-log candidates from winning (exercised by teststalelogcandidateloses_election): how lastLogIndex and lastLogTerm are comparedraft-follower-rejects-writes — RaftNode.client_request() on a follower returns {"success": False, "error": "not leader"} rather than raising an exceptionraft-cluster-deterministic-simulation — RaftCluster uses tick-based deterministic simulation with no real clocks or network I/O, making all tests reproducibleraft-uncommitted-entries-overwritten — Uncommitted log entries from a deposed leader are overwritten when the node receives AppendEntries from a new leader with conflicting entries at the same indexraft-minority-cannot-elect — A partition containing fewer than ⌈(n+1)/2⌉ nodes cannot elect a leader; get_leader() returns None in this scenarioraft-terms-strictly-increase — Each new leader has a strictly higher term than the previous leader; terms never repeat or decrease across leader transitions