jstests/core/invalid_db_name.js


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// Ensures that invalid DB names are reported as write errors
(function() {
    var invalidDB = db.getSiblingDB("NonExistentDB");

    // This is a hack to bypass invalid database name checking by the DB constructor
    invalidDB._name = "Invalid DB Name";

    var doWrite = function() {
        return invalidDB.coll.insert({x: 1});
    };

    // This will return a $err style error message if we use OP_INSERT, but a
    // {ok: 0, errmsg: "...", code: ...} style response if we use write commands.
    if (db.getMongo().writeMode() == "compatibility") {
        assert.throws(doWrite);
    } else {
        assert.writeError(doWrite());
    }

    // Ensure that no database was created
    var dbList = db.getSiblingDB('admin').runCommand({listDatabases: 1}).databases;
    dbList.forEach(function(dbInfo) {
        assert.neq('Invalid DB Name', dbInfo.name, 'database with invalid name was created');
    });
}());