mongodb/jstests/noPassthrough/repl_set_resize_oplog.js

/**
 * Tests that resizing the oplog works as expected and validates input arguments.
 *
 * @tags: [requires_replication, requires_wiredtiger]
 */
(function() {
    "use strict";

    let replSet = new ReplSetTest({nodes: 2, oplogSize: 50});
    replSet.startSet();
    replSet.initiate();

    let primary = replSet.getPrimary();

    const MB = 1024 * 1024;
    const GB = 1024 * MB;
    const PB = 1024 * GB;
    const EB = 1024 * PB;

    assert.eq(primary.getDB('local').oplog.rs.stats().maxSize, 50 * MB);

    // Too small: 990MB
    assert.commandFailedWithCode(
        primary.getDB('admin').runCommand({replSetResizeOplog: 1, size: 900}),
        ErrorCodes.InvalidOptions,
        "Expected replSetResizeOplog to fail because the size was too small");

    // Way too small: -1GB
    assert.commandFailedWithCode(
        primary.getDB('admin').runCommand({replSetResizeOplog: 1, size: -1 * GB / MB}),
        ErrorCodes.InvalidOptions,
        "Expected replSetResizeOplog to fail because the size was too small");

    // Too big: 8EB
    assert.commandFailedWithCode(
        primary.getDB('admin').runCommand({replSetResizeOplog: 1, size: 8 * EB / MB}),
        ErrorCodes.InvalidOptions,
        "Expected replSetResizeOplog to fail because the size was too big");

    // The maximum: 1PB
    assert.commandWorked(
        primary.getDB('admin').runCommand({replSetResizeOplog: 1, size: 1 * PB / MB}));

    assert.eq(primary.getDB('local').oplog.rs.stats().maxSize, 1 * PB);

    replSet.stopSet();
})();