Rails 單元測試，FlexMock 0.9.4 發布

FlexMock是一個比較流行的針對Rails單元測試的Mock工具，

安裝方法：$ gem install flexmock

FlexMock 0.9.4 發布，該版本主要改進內容包括：

1. This release adds support for stubbing return values on getter properties and non-callable attributes.
2. It also adds custom matcher object support to with_args(), stricter function signature checks, support for chained attributes, and iter support to Mock objects.
3. should_call() is fixed to work with class mocks, and_return() is fixed to return None by default, and partial mocks created using the func=return_value style will now use replace_with() instead of should_receive() for callable values.
4. As of this release, flexmock is also tested as working on PyPy and Jython

代碼示例：

  require 'test/unit'
  require 'flexmock/test_unit'

  class TemperatureSampler
    def initialize(sensor)
      @sensor = sensor
    end

    def average_temp
      total = (0...3).collect {
        @sensor.read_temperature
      }.inject { |i, s| i + s }
      total / 3.0
    end
  end

  class TestTemperatureSampler < Test::Unit::TestCase
    def test_sensor_can_average_three_temperature_readings
      sensor = flexmock("temp")
      sensor.should_receive(:read_temperature).times(3).
        and_return(10, 12, 14)

      sampler = TemperatureSampler.new(sensor)
      assert_equal 12, sampler.average_temp
    end
  end