Feature: must_receive

  So that I can write accurate specifications
  As an RSpec user
  I want to be able to use #must_receive instead of #should_receive

  Scenario: #must_receive when expectation is met
    Given a file named "must_receive_met_spec.rb" with:
      """
      require 'rspec'
      require 'rspec/must'

      describe Object do
        it 'receives a message' do
          o = double('object')
          o.must_receive :class
          o.class
        end
      end
      """
    When I run `rspec must_receive_met_spec.rb`
    Then the example must pass

  Scenario: #must_receive when expectation is not met
    Given a file named "must_receive_not-met_spec.rb" with:
      """
      require 'rspec'
      require 'rspec/must'

      describe Object do
        it 'receives a message' do
          o = double('object')
          o.must_receive :class
        end
      end
      """
    When I run `rspec must_receive_not-met_spec.rb`
    Then the example must fail
    And the output must contain "received: 0 times"