问无法使用RSpec 2和边缘Rails 3进行控制器测试

EN

require 'spec_helper'

describe DiscrepanciesController do
  before :each do
    Discrepancy.delete_all
  end

  it "resolves a discrepancy" do
 discrepancy = Discrepancy.create(:my_number=>"12345", :status=>"Open")

 get :resolve, :id => discrepancy.id

 retrieved_discrepancy = Discrepancy.find_by_my_number("12345")
 retrieved_discrepancy.status.should == "Resolved"
  end
end

1) DiscrepanciesController resolves a discrepanc
    Failure/Error: Unable to find C to read failed line
    undefined method `get' for #<RSpec::Core::ExampleGroup::Nested_1:0xc9170d0 @__memoized={}>
    # ./spec/controllers/discrepancies_controller_spec.rb:38 (ignore the line number, commented out code was removed from the sample)
    # C:/Users/Patrick_Gannon/.bundle/ruby/1.8/bundler/gems/rails-16a5e918a06649ffac24fd5873b875daf66212ad-master/activesupport/lib/active_support/dependencies.rb:212:in `inject'
    # C:/Ruby187/bin/rake:19:in `load'
    # C:/Ruby187/bin/rake:19

"__memoized", "__should_for_example_group__", "__should_not_for_example_group__", "_fixture_class_names", "_fixture_path", "_fixture_table_names", "_pre_loaded_fixtures", "_setup_mocks", "_teardown_mocks", "_use_instantiated_fixtures", "_use_transactional_fixtures", "_verify_mocks", "a_kind_of", "allow_message_expectations_on_nil", "an_instance_of", "any_args", "anything", "assert", "assert_block", "assert_equal", "assert_in_delta", "assert_instance_of", "assert_kind_of", "assert_match", "assert_nil", "assert_no_match", "assert_not_equal", "assert_not_nil", 
"assert_not_same", "assert_nothing_raised", "assert_nothing_thrown", "assert_operator", "assert_raise", "assert_raises", "assert_respond_to", "assert_same", "assert_send", "assert_throws", "be", "be_a", "be_a_kind_of", "be_a_new", "be_an", "be_an_instance_of", "be_close", "be_false", "be_instance_of", "be_kind_of", "be_nil", "be_true", "boolean", "build_message", "change", "described_class", "double", "duck_type", "eq", "eql", "equal", "example", "example=", "exist", "expect", "fixture_class_names", "fixture_class_names?", "fixture_path", "fixture_path?", "fixture_table_names", 
"fixture_table_names?", "flunk", "hash_including", "hash_not_including", "have", "have_at_least", "have_at_most", "have_exactly", "include", "instance_of", "kind_of", "match", "method_missing", "method_name", "mock", "mock_discrepancy", "mock_model", "no_args", "pending", "pre_loaded_fixtures", "pre_loaded_fixtures?", "raise_error", "respond_to", "run_in_transaction?", "running_example", "satisfy", "setup_fixtures", "stub_model", "subject", "teardown_fixtures", "throw_symbol", "use_instantiated_fixtures", "use_instantiated_fixtures?", "use_transactional_fixtures", "use_transactional_fixtures?"