jstests/noPassthroughWithMongod/default_read_pref.js


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// Tests that the default read preference is 'unset', and that the slaveOk bit is not set
// on read commands run with an 'unset' read preference.
(function() {

    "use strict";

    var mongo = db.getMongo();
    try {
        var commandsRan = [];
        db._mongo = {
            getSlaveOk: function() { return false; },
            getReadPrefMode: function() { return mongo.getReadPrefMode(); },
            getReadPref: function() { return mongo.getReadPref(); },
            runCommand: function(db, cmd, opts) {
                commandsRan.push({db: db, cmd: cmd, opts:opts});
            }
        };

        db.runReadCommand({ping: 1});
        assert.eq(commandsRan.length, 1);
        assert.docEq(commandsRan[0].cmd, {ping: 1}, "The command should not have been wrapped.");
        assert.eq(commandsRan[0].opts & DBQuery.Option.slaveOk, 0, "The slaveOk bit should not be set.");

    } finally {
        db._mongo = mongo;
    }

})();