/**
 * Tests that the 'newTermStartDate' and 'wMajorityWriteAvailabilityDate' fields of the
 * replSetGetStatus 'electionCandidateMetrics' section are present only when they should be.
 */

(function() {
"use strict";
load("jstests/libs/write_concern_util.js");
load("jstests/replsets/rslib.js");

const name = jsTestName();
const rst = new ReplSetTest({name: name, nodes: 3});

rst.startSet();
rst.initiateWithHighElectionTimeout();
rst.awaitReplication();

// The default WC is majority and stopServerReplication will prevent satisfying any majority writes.
assert.commandWorked(rst.getPrimary().adminCommand(
    {setDefaultRWConcern: 1, defaultWriteConcern: {w: 1}, writeConcern: {w: "majority"}}));
rst.awaitReplication();
stopServerReplication(rst.nodes);

// Step up one of the secondaries.
const newPrimary = rst.getSecondary();
assert.soonNoExcept(function() {
    assert.commandWorked(newPrimary.adminCommand({replSetStepUp: 1}));
    rst.awaitNodesAgreeOnPrimary(rst.kDefaultTimeoutMS, rst.nodes, newPrimary);
    return newPrimary.adminCommand('replSetGetStatus').myState === ReplSetTest.State.PRIMARY;
}, 'failed to step up node ' + newPrimary.host, rst.kDefaultTimeoutMS);

// Wait until the new primary completes the transition to primary and writes a no-op.
assert.eq(rst.getPrimary(), newPrimary);

// Check that the 'electionCandidateMetrics' section of the replSetGetStatus response has the
// 'newTermStartDate' field once the transition to primary is complete.
let res = assert.commandWorked(newPrimary.adminCommand({replSetGetStatus: 1}));
assert(res.electionCandidateMetrics,
       () => "Response should have an 'electionCandidateMetrics' field: " + tojson(res));
assert(res.electionCandidateMetrics.newTermStartDate,
       () => "Response should have an 'electionCandidateMetrics.newTermStartDate' field: " +
           tojson(res.electionCandidateMetrics));

// Check that the 'electionCandidateMetrics' section of the replSetGetStatus response does not have
// the 'wMajorityWriteAvailabilityDate' field before the new term oplog entry has been replicated.
assert(
    !res.electionCandidateMetrics.wMajorityWriteAvailabilityDate,
    () =>
        "Response should not have an 'electionCandidateMetrics.wMajorityWriteAvailabilityDate' field: " +
        tojson(res.electionCandidateMetrics));

restartReplSetReplication(rst);
rst.awaitLastOpCommitted();

// Check that the 'electionCandidateMetrics' section of the replSetGetStatus response has the
// 'wMajorityWriteAvailabilityDate' field once the new term oplog entry is in the committed
// snapshot.
res = assert.commandWorked(newPrimary.adminCommand({replSetGetStatus: 1}));
assert(res.electionCandidateMetrics,
       () => "Response should have an 'electionCandidateMetrics' field: " + tojson(res));
assert(
    res.electionCandidateMetrics.wMajorityWriteAvailabilityDate,
    () =>
        "Response should have an 'electionCandidateMetrics.wMajorityWriteAvailabilityDate' field: " +
        tojson(res.electionCandidateMetrics));

rst.stopSet();
})();