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// Test the populating lastOpVisible field of the ReplSetMetadata.
// First we do a writeConcern-free write and ensure that a local read will return the same
// lastOpVisible, and that majority read with afterOpTime of lastOpVisible will return it as well.
// We then confirm that a writeConcern majority write will be seen as the lastVisibleOp by a
// majority read.
load("jstests/replsets/rslib.js");
(function() {
"use strict";
var name = 'lastOpVisible';
var replTest = new ReplSetTest(
{name: name, nodes: 3, nodeOptions: {enableMajorityReadConcern: ''}, waitForKeys: true});
if (!startSetIfSupportsReadMajority(replTest)) {
jsTestLog("Skipping test since storage engine doesn't support majority read concern.");
return;
}
replTest.initiate();
var primary = replTest.getPrimary();
// Do an insert without writeConcern.
var res = primary.getDB(name).runCommandWithMetadata({insert: name, documents: [{x: 1}]},
{"$replData": 1});
assert.commandWorked(res.commandReply);
var last_op_visible = res.metadata["$replData"].lastOpVisible;
// A find should return the same lastVisibleOp.
res = primary.getDB(name).runCommandWithMetadata({find: name, readConcern: {level: "local"}},
{"$replData": 1});
assert.commandWorked(res.commandReply);
assert.eq(last_op_visible, res.metadata["$replData"].lastOpVisible);
// A majority readConcern with afterOpTime: lastOpVisible should also return the same
// lastVisibleOp.
res = primary.getDB(name).runCommandWithMetadata(
{find: name, readConcern: {level: "majority", afterOpTime: last_op_visible}},
{"$replData": 1});
assert.commandWorked(res.commandReply);
assert.eq(last_op_visible, res.metadata["$replData"].lastOpVisible);
// Do an insert without writeConcern.
res = primary.getDB(name).runCommandWithMetadata(
{insert: name, documents: [{x: 1}], writeConcern: {w: "majority"}}, {"$replData": 1});
assert.commandWorked(res.commandReply);
last_op_visible = res.metadata["$replData"].lastOpVisible;
// A majority readConcern should return the same lastVisibleOp.
res = primary.getDB(name).runCommandWithMetadata({find: name, readConcern: {level: "majority"}},
{"$replData": 1});
assert.commandWorked(res.commandReply);
assert.eq(last_op_visible, res.metadata["$replData"].lastOpVisible);
}());
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