// Basic examples for $mul (multiply)
var coll = db.update_mul;
coll.drop();

// $mul positive
coll.remove()
coll.save({_id:1, a:2});
coll.update({}, {$mul: {a: 10}})
assert.gleSuccess(coll.getDB())
assert.eq(coll.findOne().a, 20)

// $mul negative
coll.remove()
coll.save({_id:1, a:2});
coll.update({}, {$mul: {a: -10}})
assert.gleSuccess(coll.getDB())
assert.eq(coll.findOne().a, -20)

// $mul zero
coll.remove()
coll.save({_id:1, a:2});
coll.update({}, {$mul: {a: 0}})
assert.gleSuccess(coll.getDB())
assert.eq(coll.findOne().a, 0)