Sinon mocking strings and integers

sinon_expect_fail.js

// FAILING TEST
describe('#test', function () {
    it('tests args', function () {
        storageMock.expects('test').once().withExactArgs(1234);
        storageManager.otherFunctionThatCallsTest(chapter_obj.id); // should call #test with args: 1234
        storageMock.verify();
    });
});
/* Console Output:
 * Unexpected call: test(1234)
 *          Expected test(1234) once (never called)
 */

sinon_expect_pass.js

// PASSING TEST
describe('#test', function () {
    it('tests args', function () {
        storageMock.expects('test').once().withExactArgs('1234');
        storageManager.otherFunctionThatCallsTest(chapter_obj.id); // should call #test with args: 1234
        storageMock.verify();
    });
});
/* Console Output:
 * ... SUCCESS!
 */