/**
 * Tests that the `versionContext` oplog field, which allows applying an oplog entry using a
 * fixed FCV snapshot when checking feature flags, is allowed by the `applyOps` command.
 *
 * @tags: [
 *   requires_replication,
 *   # versionContext is only guaranteed to be available from fcv 8.2 onwards.
 *   requires_fcv_82,
 * ]
 */
import {ReplSetTest} from "jstests/libs/replsettest.js";

const rst = new ReplSetTest({nodes: 2});
rst.startSet();
rst.initiate();
const db = rst.getPrimary().getDB("test");

const collName = "mycollection";
const cmdNss = db.getName() + ".$cmd";

const currentFCV = assert.commandWorked(db.adminCommand({getParameter: 1, featureCompatibilityVersion: 1}))
    .featureCompatibilityVersion.version;
const testVersionContext = {
    OFCV: currentFCV,
};

// versionContext is allowed in applyOps, and gets replicated in the produced oplog entries
assert.commandWorked(
    db.adminCommand({
        applyOps: [{op: "c", ns: cmdNss, o: {create: collName}, versionContext: testVersionContext}],
    }),
);

rst.awaitReplication();
assert(
    rst.getSecondary().getDB("local").oplog.rs.findOne({
        op: "c",
        ns: cmdNss,
        "o.create": collName,
        versionContext: testVersionContext,
    }),
);

// versionContext is not allowed in nested applyOps
assert.commandFailedWithCode(
    db.adminCommand({
        applyOps: [
            {
                op: "c",
                ns: "admin.$cmd",
                o: {
                    applyOps: [{op: "c", ns: cmdNss, o: {create: collName}, versionContext: testVersionContext}],
                },
            },
        ],
    }),
    10296501,
);

rst.stopSet();