請問,關於有關Unit test 問題?

[mrvh]

C:\railsproj\demo>ruby test/unit/user_test.rb
Loaded suite test/unit/user_test
Started
E
Finished in 0.703 seconds.

1) Error:
test_truth(UserTest):
ActiveRecord::StatementInvalid: Mysql::Error: #42S02Table
'demo_test.users' does
n't exist: DELETE FROM `users`

------------------------------------------------------------------------------------------------------------------------
#require 'test_helper'
require File.dirname(__FILE__) + '/../test_helper'


class UserTest < ActiveSupport::TestCase

# Replace this with your real tests.
fixtures :users

def test_truth
assert true
end


end