rspec中的存根正則表達式

Question

正則表達式如何被存根？ 例如

# somewhere deep in the code 
reg = Regexp.new("foo bar") 
res = reg.match string 

# somewhere in rspec 
reg = Regexp.new("foo bar") 
reg.stub(:match).with(string).and_return "rspec_res" #doesn't work 

Answer 1

我認爲這應該工作：

reg = stub :match => "rspec_res" 
Regex.stub(:new) { reg }