存根和模拟 Minitest

Question

我正在尝试实施和学习测试（似乎 minitest 是要走的路）。而且我在测试内部模块类方法时失败了。

这或多或少是我想要做的用例。 （也许我的做法完全错误）

module Zombie
  class << self
    # This is the method/code I want to test/execute
    def intimidate
      roar('slardar')
    end

    # This is the method that is internal, that I want to stub.
    # Actual method(not this mocked one) is stateful. So I want to have 
    # mocked predefined data. 
    def roar(a)
      'rawrger' + a
    end
  end
end

# Test Thingy
class ZombieTest < Minitest::Test
  def test_mr_mock
    @mock = Minitest::Mock.new
    @mock.expect(:roar, 'rawrgerslardar', ['slardar'])
    Zombie.stub :roar, @mock do
      Zombie.intimidate
    end
    @mock.verify
  end
end

Answer 1

您可以使用 lambda 来传递参数：

class ZombieTest < Minitest::Test
  def test_mr_mock
    @mock = Minitest::Mock.new
    @mock.expect(:roar, 'rawrgerslardar', ['slardar'])
    Zombie.stub :roar, ->(a) { @mock.roar(a) } do
      Zombie.intimidate
    end
    @mock.verify
  end
end