jstests/core/find2.js


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// Test object id sorting.

function testObjectIdFind(db) {
    r = db.ed_db_find2_oif;
    r.drop();

    for (i = 0; i < 3; ++i)
        r.save({});

    f = r.find().sort({_id: 1});
    assert.eq(3, f.count());
    assert(f[0]._id < f[1]._id);
    assert(f[1]._id < f[2]._id);
}

testObjectIdFind(db);