mongo/jstests/core/basic3.js

// Tests that "." cannot be in field names
t = db.getCollection( "foo_basic3" );
t.drop()

//more diagnostics on bad save, if exception fails
doBadSave = function(param) {
    print("doing save with " + tojson(param))
    var res = t.save(param);
    // Should not get here.
    printjson(res);
}

//more diagnostics on bad save, if exception fails
doBadUpdate = function(query, update) {
    print("doing update with " + tojson(query) + " " + tojson(update))
    var res = t.update(query, update);
    // Should not get here.
    printjson(res);
}

assert.throws(doBadSave, [{"a.b":5}], ". in names aren't allowed doesn't work");

assert.throws(doBadSave, 
              [{ "x" : { "a.b" : 5 } }], 
              ". in embedded names aren't allowed doesn't work");

// following tests make sure update keys are checked
t.save({"a": 0,"b": 1})

assert.throws(doBadUpdate, [{a:0}, { "b.b" : 1 }], 
              "must deny '.' in key of update");

// upsert with embedded doc
assert.throws(doBadUpdate, [{a:10}, { c: {"b.b" : 1 }}], 
              "must deny embedded '.' in key of update");

// if it is a modifier, it should still go through
t.update({"a": 0}, {$set: { "c.c": 1}})
t.update({"a": 0}, {$inc: { "c.c": 1}})

// edge cases
assert.throws(doBadUpdate, [{a:0}, { "":{"b.b" : 1} }], 
              "must deny '' embedded '.' in key of update");
t.update({"a": 0}, {})