如何期待一些（但不是全部）參數與RSpec should_receive？

Question

class Foo 
    def bar(a, b) 
    ... 

Foo.should_receive(:bar) 

期望bar被任何參數調用。

Foo.should_receive(:bar).with(:baz, :qux) 

預計：baz和：qux將作爲params被傳入。

如何期望第一個參數等於：baz，而不關心其他參數？

Answer 1

使用anything匹配：

Foo.should_receive(:bar).with(:baz, anything) 

Answer 2

對於Rspec的1.3anything不工作時，你的方法是接收哈希作爲參數，所以請儘量用hash_including(:key => val)：

Connectors::Scim::Preprocessors::Builder. 
    should_receive(:build). 
    with(
     hash_including(:connector => connector) 
    ). 
    and_return(preprocessor) 
}