mongo/jstests/core/remove7.js

t = db.remove7;
t.drop();

function getTags(n) {
    n = n || 5;
    var a = [];
    for (var i = 0; i < n; i++) {
        var v = Math.ceil(20 * Math.random());
        a.push(v);
    }

    return a;
}

for (i = 0; i < 1000; i++) {
    t.save({tags: getTags()});
}

t.ensureIndex({tags: 1});

for (i = 0; i < 200; i++) {
    for (var j = 0; j < 10; j++)
        t.save({tags: getTags(100)});
    var q = {tags: {$in: getTags(10)}};
    var before = t.find(q).count();
    var res = t.remove(q);
    var after = t.find(q).count();
    assert.eq(0, after, "not zero after!");
    assert.writeOK(res);
}