How to expect some (but not all) arguments with RSpec should_receive?

Question

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

expects bar to be called with any arguments.

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

expects :baz and :qux to be passed in as the params.

How to expect the first param to equal :baz, and not care about the other params?

Answer 1

Use the anything matcher:

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

Answer 2

For Rspec 1.3 anything doesn't work when your method is receiving a hash as an argument, so please try with hash_including(:key => val):

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