Why the functional test fails?

Hello when run rake test:functionals, here's what I get on the shell :

1) Failure:
test_should_create_client(ClientsControllerTest) [test/functional/clients_controller_test.rb:20]:
    "Client.count" didn't change by 1.
    <2> expected but was
    <1>.

    7 tests, 9 assertions, 1 failures, 0 errors
    rake aborted!
    Command failed with status (1): [/System/Library/Frameworks/Ruby.framework/...]

and this is what I have on line 20 in the clients_controller_test.rb file:

 test "should create client" do
    assert_difference('Client.count') do
      post :create, :client => @client.attributes
    end   

Please can anyone tell me where the problem comes from?

Thank you so much nathanvda!!!!

I have pass the attributes to the test and it works.Here' the following code

  test "should create client" do
    assert_difference('Client.count') do
      post :create, :client => {:name => 'jeff', :adress => 'ter', :city => 'ny', 
                    :email =>'get@yahpp.fr', }
    end
    assert_redirected_to client_path(assigns(:client))
    assert_equal 'Client was successfully created.', flash[:notice]
  end

Here's what I get after rake:test:functionals:

Finished in 0.292246 seconds.

7 tests, 11 assertions, 0 failures, 0 error开发者_如何学编程s

Probably, due to some validation error in the attributes you pass to the controller, there was no new client created.