Ruby 使用RSpec的测试驱动开发

我是测试新手，我需要向代码文件中的类添加代码，以便在规范文件中创建的测试能够通过

我在代码文件中写了一条注释，我认为应该在这里编写测试，但是我如何编写它们以使它们通过呢

我的规范代码如下所示：

require "wad_TIM_00_gen"

module ImpossibleMachine
    # Input and output constants processed by subprocesses
    DOWN_ARROW = 1
    UP_ARROW = 2
    RIGHT_ARROW = 3
    REPEAT_ARROW = 4
    END_PROCESS = 5 
    START_CURRENT = 6

    # RSpec Tests 
    describe Game do
        describe "#start The impossible machine game" do
            before(:each) do
                @process = []
                @output = double('output').as_null_object
                @game = Game.new(@output)
            end

            it "sends a welcome message" do
                @output.should_receive(:puts).with('Welcome to the Impossible Machine!')
                @game.start
            end

            it "sends a starting message" do
                @output.should_receive(:puts).with('Starting game...')
                @game.start         
            end
        end
    end

# Main class module
module ImpossibleMachine
    # Input and output constants processed by subprocesses. MUST NOT change.
    DOWN_ARROW = 1
    UP_ARROW = 2
    RIGHT_ARROW = 3
    REPEAT_ARROW = 4
    END_PROCESS = 5 
    START_CURRENT = 6

    class Game
        attr_reader :process, :output
        attr_writer :process, :output

        def initialize(output)
            @output = output
            puts "[#{@output}]"
        end

        # I think the tests should be written here

    end
end

我的代码文件如下所示：

require "wad_TIM_00_gen"

module ImpossibleMachine
    # Input and output constants processed by subprocesses
    DOWN_ARROW = 1
    UP_ARROW = 2
    RIGHT_ARROW = 3
    REPEAT_ARROW = 4
    END_PROCESS = 5 
    START_CURRENT = 6

    # RSpec Tests 
    describe Game do
        describe "#start The impossible machine game" do
            before(:each) do
                @process = []
                @output = double('output').as_null_object
                @game = Game.new(@output)
            end

            it "sends a welcome message" do
                @output.should_receive(:puts).with('Welcome to the Impossible Machine!')
                @game.start
            end

            it "sends a starting message" do
                @output.should_receive(:puts).with('Starting game...')
                @game.start         
            end
        end
    end

# Main class module
module ImpossibleMachine
    # Input and output constants processed by subprocesses. MUST NOT change.
    DOWN_ARROW = 1
    UP_ARROW = 2
    RIGHT_ARROW = 3
    REPEAT_ARROW = 4
    END_PROCESS = 5 
    START_CURRENT = 6

    class Game
        attr_reader :process, :output
        attr_writer :process, :output

        def initialize(output)
            @output = output
            puts "[#{@output}]"
        end

        # I think the tests should be written here

    end
end

---

在

TDD

中，首先为要编写的代码编写测试。正如我看到的，您已经编写了测试，现在您需要在您评论的地方编写实际的实现。您需要实现

start

功能，以便通过测试

---

您可以阅读关于

TDD

，以及关于

TDD

与

RSpec

的内容，您可以给我一个启动函数的示例吗？首先，您没有正确编写

RSpec

测试，您应该将

start

函数的输出响应与建议的输出匹配。当您为这个函数的所有可能输出编写了测试之后，就可以开始实现它了。我建议您阅读本文，这将有助于您理解这些概念。