jstests/core/counta.js


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// Check that count returns 0 in some exception cases.
//
// @tags: [requires_fastcount]

(function() {
'use strict';

var t = db.jstests_counta;
t.drop();

for (var i = 0; i < 10; ++i) {
    t.save({a: i});
}

// f() is undefined, causing an assertion
assert.throws(function() {
    t.count({
        $where: function() {
            if (this.a < 5) {
                return true;
            } else {
                f();
            }
        }
    });
});

// count must return error if collection name is absent
assert.commandFailedWithCode(db.runCommand("count"), ErrorCodes.InvalidNamespace);
})();