rspec 的 .should 在 Ruby 2 中失败(在 describe/it 块之外)? [英] rspec's .should fails (outside describe/it block) in Ruby 2?

问题描述

在 Ruby 2 中，使用 gem rspec 2.14.1(Ubuntu 的最新版本)，但未安装 Rails，为什么会失败?

In Ruby 2, with gem rspec 2.14.1 (Ubuntu's most recent), with Rails not installed, why does this fail?

require 'rubygems'
require 'rspec'
3 .should == 3

NoMethodError: undefined method `should' for 3:Fixnum

多年来我一直依赖于方便的习语x .should == y.

I've relied for years on the convenient idiom x .should == y.

https://www.relishapp.com/rspec/rspec-expectations/v/2-14/docs/syntax-configuration 和https://www.relishapp.com/rspec/rspec-expectations/docs/syntax-configuration 表示默认情况下仍然支持此语法.

https://www.relishapp.com/rspec/rspec-expectations/v/2-14/docs/syntax-configuration and https://www.relishapp.com/rspec/rspec-expectations/docs/syntax-configuration say that this syntax is still supported by default.

在标题中添加了outside describe/it block"，因为这似乎是根本原因.

added "outside describe/it block" to title, as that seems to be the root cause.

推荐答案

如果您想在 describe/it 块之外使用它，似乎您必须先启用它，尽管文档说明它默认启用.我假设 默认启用 意味着在规范文件 [source] 仅.例如:

If you want to use it outside a describe/it block, it seems you'd have to enable it first, although the documentation states it is enabled by default. I assume that by enable by default means within an spec file [source] only. For instance:

require 'rubygems'
require 'rspec'

RSpec.configure do |config|
  config.expect_with :rspec do |c|
    c.syntax = :should
  end
end

p 3.should == 3 # true

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