为什么我的Ruby代码中出现"错误的参数数量(0 for 2)"异常？

Question

我试图通过从"测试驱动开发:通过示例"重写Kent Beck的xUnit Python示例来改进我的Ruby.我已经走得很远了,但是现在我运行的时候出现了以下错误.

C:\Documents and Settings\aharmel\My Documents\My Workspace\TDD_Book\TDDBook_xUnit_RubyVersion\lib\main.rb:21:in `test_running': wrong number of arguments (0 for 2) (ArgumentError)
    from C:\Documents and Settings\aharmel\My Documents\My Workspace\TDD_Book\TDDBook_xUnit_RubyVersion\lib\main.rb:21:in `run'
    from C:\Documents and Settings\aharmel\My Documents\My Workspace\TDD_Book\TDDBook_xUnit_RubyVersion\lib\main.rb:85

我的代码看起来像这样:

class TestCase
  def initialize(name)
    puts "1.  inside TestCase.initialise: @name: #{name}"
    @name = name
  end
  def set_up
    # No implementation (but present to be overridden in WasRun) 
  end
  def run
    self.set_up
    self.send @name  # <<<<<<<<<<<<<<<<<<<<<<<<<= ERROR HERE!!!!!!
  end
end

class WasRun < TestCase
  attr_accessor :wasRun
  attr_accessor :wasSetUp 

  def initialize(name)
    super(name)
  end
  def set_up
    @wasRun = false
    @wasSetUp = true
  end
  def test_method
    @wasRun = true
  end
end

class TestCaseTest < TestCase
  def set_up
    @test = WasRun.new("test_method")
  end
  def test_running
    @test.run
    puts "test was run? (true expected): #{test.wasRun}"
  end
  def test_set_up
    @test.run
    puts "test was set up? (true expected): #{test.wasSetUp}"
  end
end

TestCaseTest.new("test_running").run

有谁可以指出我明显的错误？

Answer 1

这是你的印刷声明:

  puts "test was run? (true expected): #{test.wasRun}"

应该

  puts "test was run? (true expected): #{@test.wasRun}"

没有'@'你正在调用Kernel#test,它需要2个变量.