Question

我正在经历“学习Ruby”的艰辛之路，直到现在还很棒。我不能为我的生活找出为什么我的测试不起作用。我花了几个小时试图解决它，我确信这很简单。

对我而言，它似乎没有找到扫描方法，但我似乎可以找出原因。任何帮助表示赞赏！

这是代码

test_lexicon.rb文件

require_relative '../lib/ex48/lexicon.rb'
require "test/unit"

class TestNAME < Test::Unit::TestCase

  def test_directions
    assert_equal(Lexicon.scan("north"), 'north')
  end

end

lexicon.rb文件

class Lexicon

  def scan(text)
    return text
  end

end

以下是来自终端的错误：

运行测试：

[1/1] TestNAME＃test_directions = 0.00 s 1）错误： test_directions（测试名）： NoMethodError：未定义的方法scan' for Lexicon:Class /Users/guest1/Dropbox/ruby_projects/play/ex48/tests/test_lexicon.rb:7:in test_directions＆＃39; /Users/guest1/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/minitest/unit.rb:1301:in run' /Users/guest1/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/test/unit/testcase.rb:17:in运行＆＃39; /Users/guest1/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/minitest/unit.rb:919:in block in _run_suite' /Users/guest1/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/minitest/unit.rb:912:in map＆＃39; /Users/guest1/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/minitest/unit.rb:912:in _run_suite' /Users/guest1/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/test/unit.rb:657:in阻止_run_suites＆＃39; /Users/guest1/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/test/unit.rb:655:in each' /Users/guest1/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/test/unit.rb:655:in _ run_suites＆＃39; /Users/guest1/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/minitest/unit.rb:867:in _run_anything' /Users/guest1/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/minitest/unit.rb:1060:in run_tests＆＃39; /Users/guest1/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/minitest/unit.rb:1047:in block in _run' /Users/guest1/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/minitest/unit.rb:1046:in每个＆＃39; /Users/guest1/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/minitest/unit.rb:1046:in _run' /Users/guest1/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/minitest/unit.rb:1035:in运行＆＃39; /Users/guest1/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/test/unit.rb:21:in run' /Users/guest1/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/test/unit.rb:774:in run＆＃39; /Users/guest1/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/test/unit.rb:366:in block (2 levels) in autorun' /Users/guest1/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/test/unit.rb:27:in run_once＆＃39; /Users/guest1/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/test/unit.rb:365:in,clock in autorun＆＃39;

完成测试0.004470s，223.7136次测试/秒，0.0000断言/秒。 1个测试，0个断言，0个失败，1个错误，0个跳过

ruby -v：ruby 2.0.0p481（2014-05-08修订版45883）[x86_64-darwin13.1.0] 耙子流产了！

Answer 1

您已在班级中定义了一个实例方法：

def scan(text)
  return text
end

但是正在尝试在测试中调用类方法：

Lexicon.scan("north")

要使它成为类方法，请执行：

def self.scan(text)
  return text
end

编辑：这个答案没有解决你是否应该使用类，实例或模块方法。

简单的Ruby测试不起作用

1 个答案: